This study is a case report of the tapered implant fixture which developed 29 months after prosthetic loading. When bone resorption
occurs more than 5 mm, the thickness, surface area and strength of the tapered fixture are reduced sharply. The shape deformation and
damage of the fixture occur when the yield strength of this material reach at 85% level. Fatigue fracture of the implant can be caused
by the implant connection type (external and internal connection), the shape of the implant (straight and taper) and bone absorption.
It is very important to prevent the progressive bone loss through periodic maintenance care and to change the tapered fixture design
and the length of the abutment screw. (JOURNAL OF DENTAL IMPLANT RESEARCH 2015;34(2):35-40)