02 evaluation and selection of dental materials
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Evaluation and Selection of Dental Materials
Dr. Layla Abu Naba’a
BDS, PhD, MFD RCS
Assistant Professor of Prosthodontics
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OBJECTIVES
• What Are Biomaterials?• Selection Of Dm Is A Part Of The Dental Care
Spectrum• DM Is One Of The Fastest Developing Dental
Sciences, With Ancient Roots (History)• How Do You Select Your Material• How Are Dental Materials Evaluated• Role Of The Dental Team• How To Extract Dental Material Information • References
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WHAT ARE BIOMATERIALS?
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BIOMATERIALS
Definition:
• A none living material designed to
interact with a biological system
“Human Body”.
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DENTAL MATERIALS
Definition:The study of the materials related to the dental
treatment in terms of :
CompositionProperties Interactions with the oral environment Selection
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DM, The part of a spectrun
Dental CareEx
amin
atio
n
Dia
gnos
isH
alt ac
tive
Dis
ease
Stab
ilize
Reh
abili
tate
Prev
ent
Furt
her
Prog
ress
ion
DM
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VARIETIES of DM
Soft or hardIntra-oral or extra-oralRestorative
Direct or indirect restorative material Permanent or temporary Fixed or removable
Preventive Therapeutic protective
Auxiliary Required for the fabrication Not part of the final prosthesis
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GROUPS OF DM
•Metals
•Ceramics
•Polymers
•Composites
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DM is one of the fastest developing dental sciences, with ancient roots.
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HISTORY
2500 BCE Dental Diseases Treated
600-300 Bridges/ Gold Rings, Teeth
Romans Gold Shells, Fixed Bridges Full And Partial Dentures
1700 Ivory Basis And Natural Teeth Dentures 1700 Porcelain Teeth
1844 Vulcanate Denture Base
650 -1800 Silver Paste
1846 Band Amalgam
1850 Vulcanite (Sulphur Hardened Rubber)
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HISTORY
1879 Zinc Phosphate Cement
1880 Sillicate Cements Are Developed
1895 Amalgam Formula
1855 Gold Foil
1907 Casting Gold Inlays
1932 Resins For Denture Bases
1955 Acid Etching
• 1874 Fluorides
• 1945 Fluoridation Of Water
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HISTORY 1950s Acrylic Resin For Fillings/ Dentures
1955 Acid-etch Technique For Enamel
1970 Composites Replace Silicate Cements
1976 Glass-ionomer Cements
1978 Light-activated Composites Appear On The Market
1983 Resin-bonded Ceramic Veneer
1985 Dentine Bonding Agents
1988 Resin-modified Glass-ionomer
1994 Compomer
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How do you select the material?
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AnalysisSituations requiring the dental material provide
different conditions Example
Filling material• Age• Position• Depth of cavity • Colour • Stress
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RequirementsWhat are the criteria the dental material must
have to perform optimally in the previous situation
FillingsAdhesive ColourCompatible with other material
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Available material
In the country
In the store
In the surgery
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Choice of material
Knowledge
Personal preference
Experience
Quality
Application
Cost
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Evaluation of dental materials
Quality assurance
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Standard Specifications
Identifies the required properties
of material to insure satisfactory
performance if the material is
properly manipulated.
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Standard Specifications
Develop new specifications (a minimal
permissible result)
Review old standards regularly
Look for evidence of
Safety
Efficacy evidence
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Quality assurance Bodies and Programs
American National standards institute (ANSI) American Dental Association (ADA)
Standards committee for dental products (SCDP)Council on scientific affairs (CSA)
Food and Drug Administration (FDA) Federation Dentaire internationale (FDI) International organization for Standardisation
(ISO) ISO technical committee, ISO TC 106-
Dentistry CE
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Sources of Standards information Research organisations
Universities
Dental Profession
Manufacturers
Users
Consumer groups
Dental vendors
Testing laboratories
Governments
• Laboratory evidence
(in-vitro)
• Clinical Evidence
(in-vivo)
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Role Of The Dental Team
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Dentists, Assistants & Technicians
Proper Selection
Care
Safety
Delivery
Application
Use and handling
Disposal
Advice
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How to extract information
Get the most of what you have
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Sources of DM Knowledge Text books (Basic) Professional journals (Scientific) Lectures (General) Review bodies (Comparisons) Certificates prerequisites (Detailed) Materials containers, leaflets and packages (Use) Internet links Manufacturers Expert personal contact Material representatives
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Evidence based knowledge;Clinical studies
Systematic review articles, meta analysis
Critical reviews
Long term clinical trials
Cohort studies on subjects
Follow up studies of material longevity
Short term clinical studies
Animal experiments
Physical properties data
In-vitro experiments
Deductions from clinical trials
(if more F release then less caries, high strength ceramics have less failure)
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Examples of Review bodies
• Reality
• Dental advisor
• Clinical research associates
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The package
• Name of the material• Company or manufacturer details• Main and sub category• Uses• Ingredients• Contents• Approval body• Production and expiry dates
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The package
• Storage (Temperature and humidity) • Dispensation method• Working and Setting times• Handling (read symbols)• Safety instructions• Disposal method recommended• Other specifications
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Storage6
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Clinical use6
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Caution and Safety6
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Thank you
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REFERENCESNAME AUTHORS
PUBLICATION COMPANY
ED YEAR CODE
Clinical experience,Assistant professor, Prosthodontics
Dr Layla Abu-Naba'aBDS, PhD, MFDRCS
Jordan university of Science and Technology
2006
Philips Science of Dental Materials
Kenneth J.Anusavice
Saunders Publications
11 2003
Applied Dental Materials J.F. McCabe Blackwell Scientific
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Introduction to Dental Materials Van Noort Mosby 2 2002
Dental Materials and Their Selection
William J. ObrienQuintessense Books
32002
Dental Materials. Clinical Applications for Dental Assistants and Dental Hygienists
CD. Hatrick et al Saunders Publications
1 2003
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