1st imc alumni congress allied with german surgical foundation … · 2020. 4. 3. · this...

1st IMC® Alumni Congressallied with German Surgical Foundation

Update in Oral Medicine4th – 5th October 2018Münster | GermanyProgram and Abstractbook


Dear Colleagues,

On behalf of the Organising Committee I would like to thank you all for coming to

Münster for this 1st IMC® Alumni Congress allied with German Surgical Foundation.

This conference offers an interesting and diverse scientific programme with a true

international perspective. The certificates of participation will be issued by the IMC and

the German Surgical Foundation. Especially for the IMC Master Graduate Alumni

this congress provides a session where they have the possibility to present their own

research, experience and special cases.

Moreover – as a highlight - the German Surgical Foundation (DCS) which is allied to

this congress bestows the Ruth-Erwig-Award for the five best master theses of the

IMC-Master-Examination year 2017 in the total amount of 5.000,-€.

Furthermore the congress gives you/us the opportunity to visit again Münster and to

meet your former colleagues. We hope that you will benefit from both educational and

social events. We are looking forward to welcome you at the 2nd IMC Alumni Congress

in 2020 in Münster again.

With kind regards

Univ.-Prof. Dr. Dr. Dr. h. c. mult. Ulrich Joos,

FRCS, FDSRCS

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Program | Thursday Program | Friday

English language program

Chairmen: Prof. Weischer, Prof. Sculean

09.00 - 09.30 Welcome Prof. Joos

09.30 - 10.15 Navigated implantology Prof. Piffko10.15 - 11.00 Implantology in complicated cases Prof. Weber/Pd. Engel 11.00 - 11.30 Break

11.30 - 12.15 How to avoid complications in implantology? Prof. Weischer12.15 - 13.00 Navigated dental surgery Pd. Fillies

13.00 - 13.45 Lunch

Chairmen: Priv. Doz. Dr. Fillies, Prof. Beikler

13.45 - 14.30 Treatment of periodontitis and implantitis Prof. Beikler 14.30 - 15.15 Lingual technique only for aesthetic reasons? Prof. Wiechmann15.15 - 16.00 Surgery first a valid procedure for aesthetic outcome in orthognathic surgery? Prof. Stamm

16.00 - 16.30 Break

16.30 - 17.15 Anterior aesthetics: direct composite restorations or indirect ceramic veneers? Prof. Manhart17.15 - 18.00 Treatment of soft tissue defects at natural teeth and dental implants. The Bernese Concept Prof. Sculean

18.00 - 19.30 Welcome reception

English language program

Chairmen: Prof. Markus, Prof. Khoury

09.00 - 10.00 How to avoid or overcome failures in implantat prosthodontic Prof. Zöllner

10.00 - 11.00 Does navigated implantology improve the functional and aesthetic outcome and does it enhance patient safety? Prof. Neukam

11.00 - 11.30 Break

11.30 - 12.00 Alumni presentations

12.00 - 13.00 Bone reconstruction for implants in anterior zone Prof. Khoury

13.00 - 14.00 Lunch

Chairmen: Prof. Joos, Prof. Piffko

14.00 - 15.00 Treatment possibilities in CMF disorders Prof. Yang short-term change: Craniomandibular disorders, neuropathies and facial pain – the role of orthodontics Prof. Stamm

15.00 - 16.00 Special lecture Prof. Shen short-term change: Treatment of TMJ diseases Prof. Joos

16.00 - 16.30 Break

16.30 - 17.15 Diode laser in immediate implant placement in alveols with periapical pathology Prof. Weischer

17.15- 18.00 Award ceremony winners of DCS Ruth Erwig Price

18.00 Closing ceremony

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Abstract 1:Clinically relevant concerns regardingguided implant surgery: Our clinical and experimental results

József Piffkó, Kristóf Boa, Ibrahim BarrakSzeged, Hungary

BackgroundStatic navigation systems in guided implant placement are gaining more and more field

in oral implantology, however, there are certain questions arising amongst clinicians concerning the precision of the technique and the effectiveness of external irrigation. The aim of our clinical study was to assess the in vivo accuracy of a simplified protocol. The aim of our first experimental study was to evaluate the role of different irrigation fluid temperatu-res in controlling intraosseous temperature in guided and freehand implant site preparation, whereas the aim of our second experimental study was to evaluate the effect of extensive use of drill bits in guided implant surgery at different drilling speeds, using different handling and sterilization protocols.

Materials and methodsOne hundred and five guided implant placements were performed in our clinical study,

pre- and postoperative CBCT scans were used for evaluation of the accuracy. In the first experimental setting, different drill diameters, drilling speeds, and irrigation fluid temperatu-res were evaluated in guided and freehand settings alike. Temperature was measured using K-type thermocouples. In the second experimental setting, study groups were defined by the combination of drilling speed and handling/sterilization protocol. One cycle included 3 drillings, followed by handling/sterilization. After every tenth cycle, intraosseous tempera-ture measurements were performed. Bovine ribs with proper cortical thickness were used as a bone model. Axial pressure was controlled at 2 kg.

Results Our clinical results showed an overall mean deviation of 1.21 mm at the entry point, 1.58

mm at the apex, and 4.99°, whereas the three-dimensional overlap was 61.65%. At 2000 RPM, only irrigation fluid pre-cooled to 10°C was able to hold the temperature rise below the threshold, whereas at 800 RPM, all irrigation fluid groups were able to hold the mean rise below 3°C, and no single measurement exceeded 5°C. Pre-cooling the irrigation fluid to 10°C held the mean temperature rise below 2°C at 1200 RPM, and below 1°C at 800 RPM, regardless of the surgical method or the drill diameter. Regarding excessive usage, all study groups showed above-critical temperature rise after 90 drillings (30 cycles) at 2000 RPM. At 1500 and 1200 RPM, both “hard” and “soft” groups showed critical elevations after 90 drilling (30 cycles). At 800 RPM, the “hard” group reached critical increment after 210 drillings (70 cycles).

Conclusions The use of the simplified method in guided surgery provides high accuracy and predicta-

bility. The combination of low drilling speed and cooled irrigation fluid is advisable, as well as a “soft” handling/sterilization protocol.

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Diode laser in immediate implant placement in alveols with periapical osteolysisThomas Weischer, Essen, Germany

Laser – periapical osteolysis – immediate implant placement. What do these things have in common? In the lecture a strategy of immediate implant placement in alveols with periapical osteolysis by decontamination of the alveol using the antimicrobic photodyna-mic therapy is introduced. Many clinical cases will be presented. The purpose of the concept is to stabilize the alveolar bone, to minimize the necessarity of extensive prepro-sthetic surgery and to reduce the treatment time.

How to avoid complications in surgical implantology?

Complications in implantology, probably extensive complications, can happen. In the lecture not only surgical complications will be presented, but also concepts to solve and to avoid these complications. The purpose of the lecture is to convey knowledge which should improve the implantological treatment security in the daily office.

Implantology in complicated cases

Eva EngelTübingen, Germany

Patients with extra- or intraoral tissue defects belong to the most complex cases which very often cannot be solved without the means of dental implants. The intraoral conditions of maxillo-facial patients are changed because of hereditary or acquired - accidents or mostly neoplasms - diseases.

Those cases present a plethora of difficulties to the rehabilitation team (prosthodontist, dental nurses, dental technician) pertaining to an often grossly changed interarch relations-hip due to operations or to soft tissues alterations based on surgical interventions as well as a sequence of the applied irradiation therapy in cancer patients.

In my lecture cases are presented which should demonstrate how beneficial implants are in these conditions and that only a best team approach can restore those patients to a more or less acceptable life.

Abstract 2: Abstract 3:

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Abstract 4:Treatment of periodontitis and peri-implantitisThomas Beikler, Hamburg, Germany

Periodontitis and peri-implantitis share similar clinical symptoms without being conside-red identical diseases. If left untreated both diseases result into failures, i.e. tooth or implant loss.

Since both diseases pose a significant burden for the patient as well as the provider, prevention and early detection are the hallmark of a predictable und succesful treatment strategy. In addition to that controling risk factors and regular maintenance are mandatory for the longterm success of dental implant and periodontal therapy.

This presentation aims to provide an overview about the current strategies for the prevention and treatment of peri-implant and periodontal diseases.

Surgery first - A valid procedure for aesthetic outcome in orthognathic surgery?Thomas Stamm, Münster, Germany

The term “Surgery First” was introduced in the orthognathic surgery field in 1999. The concept behind is to place the orthodontic treatment after surgery with the aim to reduce the overall treatment time. It was observed that in some circumstances the orthodontic preparation for surgery could be challenging, especially in class III patients, deep bite, or high angle cases.

The good results in lower front teeth decompensation and flattening the curve of Spee after surgery leads to the assumption that “Surgery First” is advantageous for any kind of orthognathic surgery. Nearly 20 years after the introduction of Surgery First practitioners experience and research have led to various optimal times of surgery ranging from "Surgery First" to "Surgery Late".

In this oral presentation different cases are presented to explain which patient could benefit from early surgery in view of aesthetics, occlusion, relaps and treatment time.

Abstract 5:

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Abstract 6: Abstract 7:Anterior aesthetics: Direct composite restorations or indirect ceramic veneers?Jürgen Manhart, Munich, Germany

For the restoration of anterior teeth, esthetics plays a dominant role for most of the patients. The impairment of the integrity of anterior teeth and identifiable restorations constitute mostly a severe problem. For the dentist, these situations are a great challenge and commitment, as an esthetic perfect restitution is mandatory due to the exposed position of these teeth.

Today, direct composite restorations in the anterior region allow to satisfy highest esthetic demands. The realization of anterior composite restorations with excellent function and perfect esthetic appearance paralleled by an excellent longevity makes high demands on the restorative material and on the dentist's treatment skills. To obtain reproducible and most notably predictable results with a high degree of naturalness, a profound knowledge of the technical and esthetical basics as well as an understanding of the correct layering technique with composite pastes of different shades and translucencies is necessary.

Ceramic veneers allow in many cases the treatment of a compromised anterior dentition with optimum esthetics. Veneers are used in single tooth cases and extend their indications to complete "Smile Design"-cases. Their outstanding esthetic and functional possibilities are supported by an excellent clinical survival rate. Clinical strategies for the use of ceramic veneers in anterior and posterior teeth are presented in this course in a very practically oriented way. Numerous clinical step-by-step patient cases show detailed the different treatment indications.

Treatment of soft tissue defects at teeth and dental implants: The Bernese ConceptAnton Sculean, Bern, Switzerland

Predictable coverage of multiple adjacent recessions and of single mandibular deep recessions is still a challenge for the clinician. New data indicate that the use of the modified coronally advanced tunnel (MCAT) or the newly developed laterally closed tunnel (LCT) in conjunction with biologic factors such as enamel matrix proteins, connective tissue grafts, certain collagen based soft tissue grafts or combinations thereof may result in predictable coverage of single and multiple adjacent gingival recessions providing also long-term stability.

Moreover, in certain, well selected cases this technique can also be successfully applied to correct soft tissue defects around dental implants. The present lecture will provide a comprehensive treatment philosophy on the surgical risk factors and biologic principles that need to be considered to optimize the results.

Presentations of clinical cases and of surgical videos will demonstrate the step-by- step procedure for the MCAT and LMT in the treatment of various types of soft tissue defects around teeth and dental implants. Long-term results with a follow-up of up to 6 years support the clinical relevance of these techniques.

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Abstract 8: Abstract 9:How to avoid or overcome failuresin implant prostheticsAxel Zöllner,Witten, Germany

The success of implant borne suprastructure is influenced by a number of different factors:

1. number and the position of implantsConcerning the soft tissue profile around implants a natural like papilla height is most

difficultly to achieve between adjacent implants whereas the soft tissue in partially edentulous regions can be molded by a specific pontic design.

2. type of suprastructure for fixed restorationsBoth – implant borne single crowns and bridges reveal a predictable treatment outcome

comparable to restorations on natural teeth. However, the combination of natural teeth and implants might be a treatment choice only for special indications as it is characterized by a higher number of failures.

3. crown/implant length ratioA mean biological crown to implant length ration of 1.5/1 has no impact on survival rates,

technical an biological failures. Extra short implants may influence crestal bone loss more significantly.

4. type of attachments for removable suprastructuresFor restoring edentulous patients with removable dentures different attachments are

available. In general they can be divided into those primarily (bar retention) or secondarily (ball attachments, locator, double crowns) splinting implants. Little evidence is available to favour a specific treatment protocol. Based on clinical cases selection criteria especially for double crown techniques or bar retainers will be discussed

5. functional aspects and material selectionFull ceramic, CAD/CAM based restorations are widely used to restore implants. However,

chipping is a major complication. Even if a strong evidence can not be found so far, scientific data suggest the increasing use of monolithic restorations. As a lack of staining improves both, the soft tissue adherence and the surface roughness influencing the wear of the opposing dentition, the use of multilayer full-ceramic restorations is promising.

Does navigated implantology improve the functional and aesthetic outcome and does it enhance patient safety?Friedrich Wilhelm Neukam, Erlangen, Germany

Computer-assisted navigation systems in combination with three-dimensional (3D) imaging by cone-beam computed tomography involving implants have become increa-singly important in recent years for improving virtual planning and manufacturing surgical template and restoration prior to surgery. It makes individual patient-centered care and a prosthetically driven approach possible. Along with that approach navigated implants show significantly better functional and aesthetic outcome and higher patient safety than freehand-inserted implants.

The computer-guided technique can help to decrease postoperative pain and swelling, as it makes implant placement with minimal surgical trauma possible, allows for immediate function and preoperatively prefabricated dental prostheses. Computer-aided navigation systems and their application possibilities in the partially edentulous and edentulous jaw are presented in patient examples.

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Abstract 10: Abstract 11:Oral rehabilitation in patient with severe bone loss in the aesthetic areaFouad Khoury,Olsberg/Münster, Germany

Unaesthetic restorations in implant prosthetics can be traced to faulty implant placement and to bony and soft tissue alveolar ridge defects. Use of various hard and soft tissue augmentations techniques can help to get satisfaction with the end esthetic and functional result. In order to achieve predictable outcomes of the regeneration, the methods have to be rooted in biologic principles supported by scientific evidence.

Autogenous bone graft is still the gold standard for the reconstruction of severe atrophy of the maxilla or the mandible. Two & 3 dimensional bony defects need for the reconstructi-on special surgical grafting procedures to assure at long term an acceptable functional and esthetical result. Autogenous bone graft harvested from intraoral sites, especially the retromolar area of the mandible, and used following the split bone block (SBB) technique is offering many possibilities for different bone reconstructions with stable long term results. Splitting the thick cortical block in to 2 or 3 thin blocks is augmenting the number of blocks allowing the reconstruction of larger atrophic crest and giving a better adaptation to the recipient site especially for vertical bone augmentation.

Soft tissue management, however, remains a primordial factor for uneventful healing of the grafted/implant site. Soft tissue augmentation (pedicle or free connective tissue graft) is also important for supporting the long term stability of the esthetical final result

Craniomandibular disorders, neuropathies and facial pain - The role of orthodonticsThomas StammMünster, Germany

Craniomandibular disorders is a general term comprising different clinical signs of malfunction and/or pain in the region of the temporomandibular joint and the related masticatory musculature.

Pain can radiate to other structures of the head and/or to the cervical spine and vice versa. Cause and coincidence in such painful circumstances are often difficult to differentia-te. There is still controversy that orthodontic treatment can cause or cure episodes of pain and malfunction which is believed to be associated with malocclusion, parafunctional habits, asymmetries, head and body posture.

There is evidence that treatment which alters the condyle position has an effect on pain episodes. A clear-cut diagnosis facilitates the treatment regimen. The presence of pre-treat-ment symptoms, type of malocclusion or jaw deformity did not identify which patient would benefit from orthodontic treatment alone.

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Abstract 12:Treatment of TMJ diseasesUlrich JoosMünster, Germany

TMJ diseases can be congenital, acquired or by tumor formation. Especially the treatment options in malformations are very limited and clear treatment protocols do not exist, though various surgical or orthodontic protocols are recommended.

Acquired TMJ problems are often not recognized in early childhood and the necessary

treatment will not thus be performed, leading in most cases to severe ancylosis. For tumor formation in the TMJ area the treatment protocols are clear, but the replacement of the condyle usually needs a very specific treatment.

The different treatment options in children and adults will be discussed together with a treatment recommendation, taking the current literature into account.

Abstract 13:Efficiency of non-surgicalperiimplantitis treatmentAziza Altarmisi 1, Ulrich Joos 2, Susanne Bierbaum 21 Heilbronn, Germany, 2 IMC Münster, Münster, Germany

Background & Aim: Periimplantitis has become the most threatening object that dentists can face. The

current study aims to review the literature on how efficient the different methods of non-surgical treatment (chemical, mechanical, laser, combination) are in reducing or eliminating symptoms and signs of periimplantitis.

Methods:A computer-based search of electronic databases “PubMed”, ‘Science Direct’, and ‘Google

scholar’ between the year 1992 and 2014 retrieved 213 articles. The search included periimplantitis, biofilm on periimplantitis and antimicrobial treatment of periimplantitis, non-surgical treatment of periimplantitis such as: laser treatment, chemical local and systemic treatment, and mechanical treatment of periimplantitis, in addition to prognosis of periimplantitis treatment as key words. The studies included were cross sectional studies, case control studies and cohort studies. After full text reading and due to the exclusion and inclusion criteria only 34 articles were selected.

Results: The 34 articles included showed that using mechanical methods alone was extremely

difficult or impossible. The combination of mechanical debridement and antibiotics/antisep-tic showed more progress in improving the clinical parameter then others. Er YAG laser was able to remove subgingival calculus without heat generations in comparison to CO2 Laser or diode laser.

Conclusion: Non-surgical treatment leads to disturbance of biofilm but only for a limited period of

time. The elimination of the biofilm is essential for treatment success in addition to maintenance and follow up for long stability.

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Abstract 14: Abstract 15:Sinus lift update: Crestal window techniqueYaarob KassemCairo, Egypt

In the course of rehabilitation of the posterior maxilla, sinus grafting procedures are necessary in almost 50% of the cases -according to literature- before implant placement. External and internal sinus floor elevation techniques are well known and highly predictable procedures. Still they come with a number of complications and additional patient discom-fort.

The “Crestal Window Sinus Lift” technique utilizes modified rotary and hand instrumentati-on and special implant design, to offer a possibly more convenient & less complicated replacement for both fore-mentioned traditional techniques - in most cases - with less patient apprehension and morbidity.

The technique, its indications, advantages & limitations would be described in the presentation, showing clinical cases (split mouth cases comparing old techniques to new technique).

Deformation of bone under loading in implants and natural teeth; comparisonin biomechanics strains effects from acro to micromolecular to the nucleus signaling remodellingTeofilo F. SerafinNY, US

IntroductionComparing the deformation in the biostructures and biointerfaces, after loading an

implant and a tooth, the mechanical values will give us an idea of how the differences in stress-strain distribution play a role in cell signaling at the micromolecular level for bone remodeling.

MaterialsRetrospective study in FEA studies in the field on biomechanics in axial loading of natural

teeth and implants, especially in the deformation of structures and interfaces in both.

ResultsThe comparison of deformation in cortical and cancellous bone in strains using FEA

analysis gives us unpredictable, high values for implantable devices around 5-10 times higher than for natural teeth.

Conclusions500% -1.000 % more deformation in structures around dental implants is a huge

biomechanical value. Reduction of this value is needed.

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Abstract 16: Abstract 17:Antibacterial effects of plant-derived polyphenols on periodontal pathogens and their modulatory effects on host inflammatory responseKübra BunteFriedrichshafen, Germany

ObjectiveTo assess the antibacterial effects of polyphenols against periodontal pathogens and their

modulatory effects on host inflammatory response.

Materials and methods The original search returned a total of two hundred fifteen studies. Of theses in vitro

studies for the assessment of antibacterial effect and ex vivo studies for the assessment of anti-inflammatory effect that were published in the last five years and only in English language were selected; animal studies and co-application of antibiotics were excluded. Two groups were formed from the selected articles (n=29) to assess the antibacterial effects on planktonic periodontal pathogens and anti-inflammatory effects on host immune response.

ResultsPolyphenols showed an antibacterial effect against planktonic periodontal pathogens by

inhibiting their growth, adhesion to oral cells and proteolytic activity, and an anti-inflammato-ry effect on host response by reducing secretion of pro-inflammatory and increasing secretion of anti-inflammatory cytokines. Studies showed a comparable antibacterial and anti-inflam-matory effect of the extracts in manner depending on dosage and time exposure. Flavan-3-ols and proanthocyanidins belonging to the flavonoid group were reported more frequently for their antibacterial, anti-proteolytic and anti-inflammatory effects.

ConclusionDue to the large variety both in application methods used and in active compounds tested,

it is difficult to extract clear and reliable conclusions, but polyphenols, especially flavonoids, appear to have a great potential in developing new ways to manage periodontal disease.

Two implants vs. three implants: A finite element study of implant-supported fixed partial dentures in the posterior mandibleTse-Min ChangTainan, Taiwan

ObjectiveUse finite element analysis to analyse the difference of stress values and stress distribution

in implants and peri-implant bone between fixed partial dentures supported by two or three implants, and provide information to assist in clinical decision making.

Materials and methods3-dimensional models of fixed prostheses of different lengths (20 mm, 25 mm, 30 mm

and 35 mm) supported by two or three implants (diameter 4.0 mm, length 10 mm, abutment length 4.5 mm) were created and tested with 300 N axial force and 130 N disto-buccal horizontal force under three different modes of force application (continuous force, mesio-distal force and distal only force). Pattern of stress distribution and the extreme von Mises stress values as well as maximum and minimum principal stresses are evaluated.

ResultsStress concentration for implant and peri-implant bone at the implant neck area was

observed in all models. The two implants group has comparable (von Mises stress and minimum principal stress) or superior (maximum principal stress) mechanical properties to the three implants group only for the 20 mm prostheses; starting from 25 mm the three implants group is mechanically superior. A spike in the most extreme stress values is observed when two implants span over 25 mm or when three implants span under 25 mm.

ConclusionThree implants only seem to be mechanically advantageous compared to two implants if

the prostheses are 25 mm or longer.

Ruth Erwig Award Ruth Erwig Award

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Abstract 18: Abstract 19:Can innovative implant surfaces increase the survival rate of short dental implants?Sumeeta DhanoaPerak, Malaysia

ObjectiveTo determine the influence of different surfaces in combination with the implant crown

ratio on the survival rate of short dental implants, and thus to assess if short dental implants with surface modification can be considered a viable and predictable option in implant dentistry.

Materials and methodsAn electronic search using PubMed library database was carried out to identify human

clinical studies on short dental implants with surface modification from 2007 to March 2017. The data extracted included types of implant surfaces, methods used to modify surfaces of implants, numbers of implants placed and lost, the survival rate of short dental implants based on length and surface property, crown implant ratio and marginal bone loss.

Results14 clinical studies were used in this review to determine the effect of surface modification

on the survival rate of short dental implants and the effect of crown implant ratio on marginal bone loss. A total number of 1299 short dental implants were analyzed, 393 were machined (survival rate of 94.1%) and 906 were surface modified (survival rate of 94. 7%).There was no significant difference of marginal bone loss or implant survival rate when crown implant ratio was larger than 1.

ConclusionShort dental implants can be considered a predictable alternative in less than ideal

clinical situations, but differences in surface topography did not significantly affect the survival rates, and increasing the crown implant ratio did not increase marginal bone loss.

Orthodontic bracket reuse: A feasible and economical option?Ming Wei Goh Auckland, New Zealand

ObjectiveTo provide orthodontic practitioners with an up to date comprehensive literature review

and meta-analysis on the practicality of reusing debonded metal orthodontic brackets.

Materials and methodsA search of MEDLINE and EBSCOhost Research Databases between January 1989 and

June 2017 yielded 63 studies after deduplication. Of the 47 were potentially relevant ones, 28 of were excluded. The remaining 19 studies were grouped into Group I (studies with same bracket brand and bonding agent) and Group II (studies with different bracket brand and bonding agents). Meta-analysis and sensitivity tests were carried out using RevMan Analysis Statistical Package in Review Manager (version 5.3).

ResultsMean shear bond strength (SBS) to debond a new bracket was 10.16 MPa. Five different

chairside recycling methods were investigated and compared: erbium laser, aluminium oxide sandblasting, high speed grinding, slow speed grinding and direct flaming method. The mean reduction of SBS when using the aforementioned methods were 0.65 MPa, 0.89 MPa, 2.82 MPa, 3.49 MPa and 3.93 MPa, respectively. Erbium laser recycling was the most efficient method, but cairside aluminum oxide sandblasting with microetcher can produce SBS comparable to the erbium laser method. Rebonding strength for both high and low speed grinding was lower compared to the sandblasting method, with high speed grinding produced somewhat better SBS than slow speed grinding, and direct flaming gave the lowest SBS.

ConclusionErbium laser recycling was the most efficient method, however, the high cost of an

erbium laser may be a hindrance. Chairside sandblasting appears to be the most feasible methods for recycling debonded metal orthodontic brackets if both SBS and economical aspects are considered.

Ruth Erwig Award Ruth Erwig Award

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Abstract 20: Abstract 21:Dental implants in patients withrheumatoid arthritis undergoing a methotrexat (MTX) therapyHarm-Dirk SteinkopfBühl/Baden, Germany

ObjectiveTo investigate the effects of the immunosuppressive and anti-inflammatory drug

methotrexate (MTX) on the rehabilitation of the stomatognathic system with dental implants in patients suffering from rheumatoid arthritis, and to examine whether significant-ly higher implant losses occur under low-dose methotrexate therapy (LDMTX, 5-20 mg / week). It is to be determined whether MTX administration is a limiting factor for implant therapy, and which complications can be expected.

Material and methodsPubMed / Medline and Cochrane Library were searched using "dental implants and

rheumatoid arthritis", "dental implants and methotrexate", "peri-implantitis and rheumatoid patients / rheumatoid arthritis", " peri-implantitis and methotrexate "," TMJ and rheumatoid arthritis "," TMJ and methotrexate "," MTX and oral mucositis / oral lesions ".

ResultsCurrent in vitro studies show that even at very low doses MTX inhibits the proliferation of

osteoblasts and umbilical vein endothelial cells (indicators of wound healing). Clinical studies, on the other hand, show relatively moderate implant loss rates or marginal bone loss in people suffering from rheumatoid arthritis.

ConclusionsThe inhibition of osteoblasts and umbilical vein endothelial cells in in vitro studies alone

does not seem to be a parameter that is sufficient to draw conclusions about the in vivo bone metabolism. With careful surgical and prosthetic methodology, implants can be successful in patients with rheumatoid arthritis that are undergoing LDMTX therapy. MTX-typical side effects must be expected at each therapy section. An intensive aftercare must be guaranteed and improves the prognosis.

Molar anchorage of class II malocclusion using miniplatesNanthaphak ChokamonratchanaNakhonratchasima, Thailand

ObjectiveIt was the aim of this study to compare different miniplate systems to implant-supported

systems with respect to anchorage loss in the treatment of dental or skeletal malocclusions. The parameters investigated were amount of molar distal movement/ tipping (mm./degree) and the amount of central incisor mesial movement/ tipping (mm./degree), as well as reduction of overjet and amount of molar or premolars mesialization during the distalization of the maxillary premolar and canine teeth

Materials and methodsThe medical databases used were ScienceDirect and Pubmed, the timeframe was 2000 to

2017. The initial search of PubMed and ScienceDirect yielded 1,579 studies; after removing duplicates and applying the inclusion and exclusion criteria, the final pool of studies allowed for the identification of 15 relevant articles. The relevant articles were either prospective or retrospective and included case studies using miniplates in skeletal or dental class II malocclusion.

ResultsThree systems of miniplates used for correction of Class II malocclusion were compared,

namely Zygoma-Gear Appliance (ZGA), Zygoma Anchorage System (ZAS); and Skeletal Anchorage System (SAS). All miniplate systems helped were effectve in the treatment in Class II malocclusion in the ways of distalization of molars and retraction of incisors without unwanted tooth movement effect.

ConclusionUsing miniplates for molar distalization and incisor retraction appears to be efficient and

produce fewer undesirable side effects comapred to implant-supported pendulums (ISP), but due to the lack of high-quality studies theses findings should be interpreted with care.

Ruth Erwig Award

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Abstract 22: Abstract 23:The osteogenic capacity of tooth-derived bone graft materialHsu-Kuang ChungHsinchu County, Taiwan

ObjectiveTo evaluate the osteogenic capacity of tooth-derived bone graft material based on

literature data on its effectiveness through clinical, histological, and radiological analysis.

Materials and methodsLiterature review with scientific articles in English language from PubMed in the time

frame of 2007 to 2017. 30 arcticles were ultimately included in the review.

ResultsTooth-derived bone graft material was found to be biocompatible, causing no or minor

inflammation, and possessing the potential to increase blood vessel formation in the grafted sites. Obvious evidence was seen of new bone formation induced by the graft regardless of autogenic, allogenic, or xenogenic origin oth the teeth. Integration between tooth bone graft and surrounding host tissue was noticed in most of the cases of the articles reviewed. From a clinical point of view, the Initial Stability Quotient (ISQ) value and the capacity to maintenance space were satisfactory compared with traditional bone graft material. Clinical availability has improved through new processing techniques that dental practitioners can use in their private practice.

ConclusionTooth-derived bone graft material was found to be an option for alveolar bone repair due

to its good osteogenic capacity, especially when extraction of teeth was unavoidable.

Behavior of soft tissue around single immediate implants in the aesthetic zoneFang-Yun Yen Kaohsiung City, Taiwan

ObjectiveThe aim of this thesis is to review soft tissue profiles and aesthetic outcome after surgery

with immediate implantation of single implants in the aethetic zone, and to determine how changes in hard and soft tissues after immediate placement of dental implants comapre to those after delayed implantation. This study should provide basic knowledge for clinicians to confidently make decisions on the use of implants in the aesthetic zone, including condi-tions of implantation and cautions.

Materials and methodsAn electronic search on PubMed and Google Scholar was performed between 2012 to

2017. Through this search and by following citations in relevant articles, 18 relevant studies were identified that met the inclusin criteria.

Results509 patients with 516 implants were included in the 18 studies, with follow-up time

ranging from 6 months to 153 months. Mean overall recession of midfacial, mesial, and distal soft tissue was 0.29 ± 0.30 mm, 0.2 mm ± 0.23 mm, and 0.25 mm ± 0.27 mm, respectively. Papilla index showed the presence of interdental papilla in most cases. Flapless surgeries were performed in 14 of the studies. Mean PES/WES score was 9.21/9 and the average of VAS was 8.69.

ConclusionDespite different implantation procedures in the reviewed studies, it can be concluded

that acceptable aesthetic outcomes can be achieved for single immediate implants in the anterior aesthetic zone, and that there are even some advantages in overall outcomes for immediate implants over delayed implants. However, further studies should include more data and be more standardized to allow statistically significant analysis.

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Speakers

Univ.-Prof. Dr. med. dent. Thomas BeiklerUniversity Medical Center Hamburg-Eppendorf (UKE)Director of the Department of Preventive and Restorative Dentistry

Pd. Dr. EngelUniversitätsklinikum Tübingen, Ltd. OÄ, Poliklinik für Zahnärztliche Prothetik mit Propädeutik

Pd. Dr. Dr. Thomas FilliesDirector of the Clinic and Policlinic for Oral and Cranio-MaxillofacialSurgery Marienhospital Stuttgart

Univ.-Prof. Dr. med. Dr. med. dent. Dr. h.c. mult. Ulrich JoosDirector Emeritus of the Clinic and Policlinic for Oral and Cranio-MaxillofacialSurgery of Münster Westphalian Wilhelms University, Director of the IMC

Prof. Dr. med. dent. Fouad KhourySchloss Schellenstein, private dental clinic, Am Schellenstein 1, 59939 Olsberg-Bigge

Prof. Dr. Jürgen ManhartLudwig-Maximilians-Universität München, OA,Poliklinik für Zahnerhaltung und Parodontologie

Univ.-Prof. Dr. Dr. Dr. h.c. Friedrich Wilhelm NeukamDirector Emeritus of the Clinic and Policlinic for Oral and Cranio-Maxillofacial Surgeryof the University of Erlangen

Univ.-Prof. Dr. med. Dr. med. dent. József PiffkóSzeged University Clinic (Szegedi Tudományegyetem), Faculty of Medicine Albert Szent-Györgyi, Medical and Pharmaceutical Center, Director of the Department of Oral and Maxillofacial Surgery

Univ.-Prof. Dr. med. dent. Anton Sculean, Dr. h.c., M.S.Director of the University Clinic for Periodontology, Freiburgstrasse 7, CH-Bern

Prof. Dr. Steve GF ShenPresident Ninth People's Hospital Shanghai, Dean Jiao Tong University School of Medicine639 Zhi Zao Ju Road, 200011 Shanghai, P. R. of China

Prof. Dr. med. dent. Thomas StammAssistant medical director of the Policlinic for Orthodontics, Münster University Hospital [UKM], Department of Orthodontics

Univ.-Prof. Dr. med. dent. Heiner WeberUniversitätsklinikum Tübingen, Ärztlicher Direktor der Poliklinik fürZahnärztliche Prothetik mit Propädeutik

Prof. Dr. med. dent. Thomas WeischerHospitals Essen-Mitte, Protestant Huyssens-Foundation,Department of Cranio-Maxillofacial Surgery

Prof. Dr. Dr. h. c. Dirk WiechmannUniversity Hannover

Univ. Prof Dr. Chi YangNinth People's Hospital Shanghai, Jiao Tong University School of MedicineDept. of Oral and Maxillofacial Surgery, 639 Zhi Zao Ju Road, 200011 Shanghai, P. R. of China

Prof. Dr. med. dent. Axel ZöllnerPrivate dental clinic, Witten

30 31


Aesculap AG

Am Aesculap Platz | D-78532 Tuttlingen

Tel.: +49 7461-950 | Fax: +49 7461-952600

E-Mail: [email protected] | www.bbraun.com

Kulzer GmbH

Leipziger Straße 2 | 63450 D-Hanau

Tel.: +49 (0) 06181 96892000

E-Mail [email protected] | www.kulzer-dental.com

IMC International Medical College

Gartenstraße 21 | D-48147 Münster

Tel: +49 (0)251 287 699 90 | Fax: +49 (0)251 535 566 40

E-Mail: [email protected] | www.med-college.de

MIB IT-Solutions

Gartenstraße 21 | D-48147 Münster

Tel.: +49 (0)251 210 86 39 | Fax: +49 (0)251 210 87 64

E-Mail: [email protected] | www.mib-it-solutions.de

Ruth Erwig Award recipients:Bunte KübraChang, Tse-MinDhanoa, SumeetaGoh, Ming WeiSteinkopf, Dr. med. dent. Harm-Dirk

Alumni speakers:Altarmisi, Dr. (LAR) AzizaKassem, YaarobSerafin, Teofilo F.

Poster presenters:Chokamonratchana, NanthaphakChung, Dr. (TWN) Hsu-KuangYen, Fang-Yun

IT-SolutionsMIB GmbH

Medizin-Informationund Beratung

Exhibition:

3332


Brumaba GmbH & Co. KG

Bürgermeister-Graf-Ring 17 | 82538 Geretsried

Tel.: +49 (0)8171 26720

E-Mail: [email protected] | www.brumaba.de

Demedi-Dent GmbH & Co. KG

Brambauerstr. 295 | 44536 Lünen

Tel.: +49 (0)231 4278474 | Fax: +49 (0)231 4278475

E-Mail: [email protected] | www.demedi-dent.com

Dentsply Sirona Implants

Steinzeugstr. 50 | 68229 Mannheim

Tel.: +49 (0)621 4302006

E-Mail: [email protected]

www.dentsplysirona.com

3534

Titelfoto: fotolia.de

www.med-college.deInternational Medical College

Gartenstraße 21 | D-48147 MünsterTel: +49 (0)251 287 699 90 | Fax: +49 (0)251 590 834 20

E-Mail: [email protected]

1st imc alumni congress allied with german surgical foundation … · 2020. 4. 3. · this...

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