DENTAL MATERIALS

ASST PROFESSORDR MUMTAZ UL ISLAM

B.Sc. BDS. MHR. M.Phil.

INTRODUCTION

• Material ?• Why dental materials ?• Science of dental materials• Composition properties interaction• The purpose • Confidence

Dentistry

• Branches of dentistry • Diversity from soft to hardest• Temperature variations 32 - 37 even 0 - 70º C • Acidity & alkalinity pH 4 - 8.5 extreme 2 - 11• Stresses durability of materials

Rationale

• Dental materials importance• Sound knowledge essential• Logical basis for a course of action • Manipulation and handling• Dentist, assistant and laboratory technician

Materials and applications

Classification of dental materials

• Preventive • Restorative • Rehabilitation • Auxiliary

Therapeutic

Selection of dental materials

• Analysis of the problem• Consideration of requirements • Available materials & their properties• Choice of material

Evaluation

• Lab based (In Vitro)• Inside its original body (In Vivo)• Inside cells or tissue out side body ( Ex Vivo)• Direct and indirect restorations• Temporary intermediate and permanent• Clinical trials

Evaluation of materials

• Standard specifications• Tests often do not cover critical aspects• Laboratory evaluations • Clinical trials• Good results in the laboratory• Failure in clinical use

Standards

• Federation Dentaire International (FDI)– Only dental products

• International Organization for Standards (ISO)– Deals with all products– Non governmentalAmerican Dental Association (ADA)

Formulation of standards

• Technical committee (TC)– Dental products comes under TC106

• Sub committees (SC)– Specific areas (products)

• Working groups (WG)– Individual product or item

• TC 106/SC 1: WG 7– Describes mercury and amalgam

Thanks