Total Pageviews

Monday, May 7, 2012

Insight on Dental implant materials

A dental implant is a "root" device, usually made of titanium, used in dentistry to support restorations that resemble a tooth or group of teeth to replace missing teeth.


Materials used :


Metals - stainless steel
               Cobalt-chromium-molybdenum based                    
               Titanium and its alloys 
              Surface coated titanium


Ceramics - Hydroxyapatite
                   Bioglass
                   Aluminum oxide 


Polymers and composites
Others- Gold,tantalum,carbon etc .




TITANIUM : Commercially pure titanium is currently the most widely used material for implants.


Basically because  :

1.Low density ( 4.5 gm/cm2) but high strenght)
2. minimal biocorrosion due to its passivating effect
3. biocompatible

Titanium also has good stiffness. Although its stiffness is only half that of steel,it is still 5-10 times higher than that of bone.

CERAMICS : 
These may be bioactive or bioinert.
Limited application due to their low tensile strength and ductility.

Bio active : Hyroxyapatite,bioglass

Bio inert : Aluminium oxide is used either in the polycrystalline form or as a single crystal.

STAINLESS STEEL :

 Austentic  steel is used as an implant material.
High strenght and ductility 


 

No comments:

Post a Comment

Indian doctor becomes WHO’s Deputy Director General

The World Health Organization has an Indian doctor for its new Deputy Director General for Programmes. Dr. Soumya Swaminathan, the directo...