1. 1. BY PUSHPENDU SARKAR UNDER GUAIDANCE OF DR. SANJAY PRASAD ASSC. PROFESSOR DEPARTMENT OF PROSTHODONTICS AND CROWN AND BRIDGE NORTH BENGAL DENTAL COLLEGE AND HOSPITAL HYDROXYAPATITE AND THEIR USE AS COATING MATERIAL IN DENTAL IMPLANTS:-A REVIEW
2. 2. What is DENTAL IMPLANT ? What is COATING IN DENTAL IMPLANT ? What is HYDROXYAPATITE MATERIALS ? What are the advantages and disadvantages to use Hydroxyapatite materials in dental implant ? INTRODUCTION
3. 3. WHAT IS DENTAL IMPLANT ?
4. 4. A dental implant (also known as an endosseous implant or fixture) is a surgical component that interfaces with the bone of the jaw or skull to support a dental prosthesis such as a crown, bridge, denture, facial prosthesis or to act as an orthodontic anchor WHAT IS DENTAL IMPLANT ?
5. 5. A coating is a covering that is applied to the surface of an object, usually referred to as the substrate. And the materials which is used in coating are called coating material. WHAT IS COATING MATERIALS ?
6. 6. HISTORICAL BACKGROUND STRUCTURE OF HYDROXYAPATITE CRYSTAL CHEMICAL COMPOSITION OF HYDROXYAPATITE COMPARISON BETWEEN HUMAN TOOTH ENAMEL AND STOICHOMETRIC HYDROXYAPATITE PHYSICAL PROPERTIES OF HYDROXYAPATITE MATERIAL HYDROXYAPATITE COATING METHODOLOGY ADVANTAGES OF HYDROXYAPATITE COATING DISADVANTAGES OF HYDROXYAPATITE COATING CLINICAL SUCCESS AND FAILURE OF HYDROXYAPATITE COATING HYDROXYAPATITE
7. 7. HISTORICAL BACKGROUND
8. 8. STRUCTURE OF HYDROXYAPATITE
9. 9. Apatite serve as a host for many foreign ions , thus a large number of other minerals can be expected. Hydroxyapatite , fluroapatite , chloroapatite conform to their empirical formula Ca5(PO4)3(OH,F,Cl). Fluorine , chlorine ,hydroxyl group can be mutually substituted. CHEMICAL COMPOSITION OF HYDROXYAPATITE MATERIALS
10. 10. CONSTITUENT STOICHIOMETRIC HA* (w/t%) Ca 39.90 P 18.50 OH 3.38 CHEMICAL COMPOSITION OF HYDROXY APATITE MATERIAL
11. 11. COMPARISON BETWEEN HUMAN TOOTH ENAMEL AND STOICHOMETRIC HYDROXYAPATITE CONSTITUENT HUMAN TOOTH ENAMEL(w/t%) Ca 36.40 P 17.80 OH ----- CO2 2.05 H2O