odontogenic infection dentist6
TRANSCRIPT
ODONTOGENIC INFECTION
Babak Saedi
Tehran university of medical science
Background Among most frequently encountered
infections in human body Plagued our species for as long as we have
existed Pre-Columbian Indians, unearthed in the
American Midwest Early Egypt revealed bony crypts of dental
abscesses, sinus tracts, and the ravages of osteomyelitis of the mandible
Treatment of localized dental infection was probably the first primitive surgical procedure performed, using a sharp stone or pointed stick to establish drainage
MICROBIOLOGY OF ODONTOGENIC INFECTIONS Usually caused by endogenous bacteria Aerobic bacteria alone rarely causative agents Streptococcus species are usually the etiologic
organisms if aerobic bacteria present Half odontogenic infections: anaerobes Most odontogenic infections due to mixed flora Mixed infections may have 5-10 organisms
present
Continued…. Bacterial composition
1. 5%-aerobic bacteria 2. 60%-anaerobic bacteria3. 35% mixed aerobic and anaerobic bacteria
Commonly cultured organisms: alpha-hemolytic Streptococcus, Peptostreptococcus, Peptococcus, Eubacterium, Bacteroides (Prevotella) melaninogenicus, and Fusobacterium.
Quantitative estimations of the number of microorganisms in saliva and plaque range as high as 1011/ml.
Presentation
History-previous toothaches, onset, duration, presence of fever, and previous treatments (antibiotics ) important
Patients may complain of trismus, dysphagia and have shortness of breath should be investigated.
Findings vary from mild swelling and pain to life-threatening airway compromise and CNS impairment
Continued….
Possibly fatal infections may present with respiratory impairment, dysphagia, impaired vision, ophthalmoplegia, hoarseness, lethargy and decreased level of consciousness
Exam findings: Toxic, CNS impairment (decreased level of consciousness, meningeal irritation, severe headache, and vomiting), eyelid edema; and ophthalmoplegia.
Continued…. Rubor- (redness) cutaneous surface involved due
to vasodilatation effect of inflammation Tumor-(swelling) occurs due to the accumulation
of pus or fluid exudate Calor-(heat) is the result of increased blood flow to
the area due to the vasodilatation. Dolor-(or pain) results from pressure on sensory
nerve endings from tisssue distention caused by edema or infection
Functiolaesa-(loss of function) problems with mastication, trismus, dysphagia, and respiratory impairment
Continued…. Inspection, palpation, and percussion are
integral parts of the exam Begin extraorally and then move inraorally Skin of the face, head, and neck for
swelling, fluctuation, erythema, sinus or fistula formation, and subcutaneous crepitus
Assess for cervical lymphadenopathy and fascial space involvement
Assess for the presence and magnitude of trismus
Continued…. Inspect teeth for presence of caries and
large restorations, localized swellings, fistulas, and mobility
FOM inspected to assess for fascial space involvement
Visualize Wharton’s and Stenson’s ducts for quality of fluid (pus or saliva)
Ophthalmologic examination: extraocular muscle function, proptosis, presence of preseptal or postseptal edema
Potential pathways of extension of deep fascial space infections of the head and neck
Alveolar bone
Soft tissue
Fascial space
Alveolar bone
Soft tissue
Fascial space
Trait of anatomyTrait of anatomy
Tooth
Caries
Pulpitis
Apical infection
Caries
Pulpitis
Apical infection
Continued….
Fascial Spaces Fascial planes offer anatomic highways for
infection to spread superficial to deep planes Antibiotic availability in fascial spaces is
limited due to poor vascularity Treatment of fascial space infections
depends on I and D Fascial spaces are contiguous and infection
readily spreads from one space to another (open primary and secondary spaces)
Despite I and D the etiologic agent (tooth) must be removed
Primary Mandibular Spaces Submental space
1. Infection can result directly due to infected mandibular incisor or indirectly from the submandibular space
2. Space located between the anterior bellies of the digastric muscle laterally, deeply by the mylohyoid muscle, and superiorly by the deep cervical fascia, the platysma muscle, the superficial cervical fascia, and the skin
3. Dependent drainage of this space is performed by placing a horizontal incision in the most dependent area of the swelling extraorally with a cosmetic scar being the result
Continued…. Submandibular Space
1. Boundaries:1. Superior-mylohyoid muscle and inferior border of
the mandible
2. Anteriorly-anterior belly of the digastric muscle
3. Posteriorly-posterior belly of the digastric muscle
4. Inferiorly-hyoid bone
5. Superficially-platysma muscle and superficial layer of the deep cervical fascia
2. Infected mandibular 2nd and 3rd molars cause submandibular space involvement since root apices lay below mylohyoid muscle
Submandibular Space Abscess
Sublingual Space Infection
Continued….
Buccal Space1. Boundaries:
1. Lateral-Skin of the face
2. Medial-Buccinator muscle
2. Both a primary mandibular and maxillary space
3. Most infections caused by posterior maxillary teeth
Buccal Space Abscess
Secondary Mandibular Spaces
Referred to as secondary spaces since they are infected after involvement of primary mandibular spaces
Failure to treat a primary space infection or a compromised host results in secondary space involvement
Connective tissue fascia has poor blood supply hence treatment usually surgical to drain purulent exudates
The secondary mandibular spaces include the masseteric, pterygomandibular, and temporal spaces
Continued….
Masseteric Space1. Located between lateral aspect of the
mandible and the masseter muscle
2. Involvement of this space generally occurs from buccal space primary involvement
3. Signs of involvement of the masseteric space include trismus and posterior-inferior face swelling
Continued….
Pterygomandibular Space1. Location: between medial aspect of the
mandible and the medial pterygoid muscle (communicates with infratemporal spaces)
2. 2ndary infection results from spread from the sublingual and submandibular spaces
3. Symptoms: 1. Trismus
2. Minimal swelling on exam
Continued…. Temporal Space
1. Location: posterior and superior to the masseteric and pterygomandibular spaces
2. Bounded laterally by the temporalis fascia and medially by the temporal bone
3. Two components:1. Superficial temporal space: located
between temporal fascia and temporalis muscle
2. Deep temporal space: located between the temporalis muscle and the temporal bone1. Continuous with the infratemporal space
Continued…. Masseteric, pterygomandibular, and
temporal spaces referred to as masticator space due to delineation by the muscles of mastication
1. Communicate freely with one another and are simultaneously involved
Secondary Mandibular Spaces
Primary Maxillary Spaces Canine Space
1. Location: between the levator anguli oris and the levator labii superioris muscles
2. Involvement primarily due to maxillary canine tooth infection
3. Long root allows erosion through the alveolar bone of the maxilla
4. Signs: 1. Obliteration of the nasolabial fold 2. Superior extension can involve lower eyelid
Buccal Space1. Posterior maxillary teeth are source of most buccal space
infections2. Results when infection erodes through bone superior to
attachment of buccinator muscle
Continued…. Infratemporal Space
1. Location: posterior to the maxilla 2. Boundaries:
1. Medial: lateral plate of the pterygoid process of the sphenoid bone
2. Superior: skull base 3. Lateral: infratemporal space is continuous
with the deep temporal space 3. Rare involvement with odontogenic
infections, but when occurs related to 3rd maxillary molar infections
Continued…. Primary maxillary space (canine, buccal,
and infratemporal space) involvement can ascend to cause orbital cellulitis (preseptal or postseptal) or cavernous sinus thrombosis
1. Ocular findings include erythema and swelling of the eyelids, and ophthalmoplegia
2. Cavernous sinus thrombosis 1. Can result from hematogenous spread of odontogenic
infections 2. Bacterial routes of spread:
1. Posterior: via pterygoid plexus or emissary veins 2. Anterior: via angular vein and inferior or superior
ophthalmic veins to the cavernous sinus3. Veins of the face and orbit valve less so retrograde flow
can occur
Orbital Abscess
Deep Neck Spaces Extension of odontogenic infections beyond the
primary spaces of maxilla and mandible is uncommon When occurs upper airway compromise and
descending mediastinitis are possible adverse sequelae
Posterior spread of ptyerygomandibular space infection is to lateral pharyngeal space
Lateral Pharyngeal space 1. Shape of an inverted cone with its base at the skull base and
its apex at the hyoid bone2. Location: medial to the medial pterygoid muscle and lateral
to the superior pharyngeal constrictor muscle 3. Anterior: pterygomandibular raphe4. Posterior: prevertebral fascia.
Continued…. Lateral pharyngeal space communicates with
retropharyngeal space. The styloid process separates posterior
compartment of the lateral pharyngeal space that contains the great vessels from the anterior space
Clinical presentation1. Severe trismus2. Lateral swelling of the neck3. Bulging of the lateral pharyngeal wall4. Rapid progression of infection in this space is common 5. Posterior compartment involvement can result in
thrombosis of the internal jugular vein, erosion of the carotid artery or its branches, and interference with cranial nerves IX to XII
Lateral Pharyngeal Space Abscess
Ludwig’s Angina
Early Ludwig's angina
Management of Odontogenic Infections Goals of management of odontogenic
infection:1. Airway protection
2. Surgical drainage
3. Medical support of the patient
4. Identification of etiologic bacteria
5. Selection of appropriate antibiotic therapy
Infection in masseteric spaceInfection in masseteric space
Infection in multi-spaceInfection in multi-space
Ludwig’s angina
Ludwig’s angina
Thank
you
Thank
you