抄録
In clinical levels, the prosthetic restoration of edentulous mandibles with severe alveolar ridge atrophy cause numerous problems.
This report concerns a successful case in which the root form Shape Memory Implant was used Perio Root Implant(P.R.I.).
In this case, five pieces of PT type of P.R.I. were implanted between left and right mental foramens.
These implants were combined to the fixed removable bridge by samarium-cobalt magnets.
The patient has been healthy for 3 years and 6 months since the operation. The PT type of P.R.I.bulges and expands at one-third of the apical area by the shape memory function after implantation.This is an osteo-integrated type implant which is expected to obtain good primary fixation and continue supporting occlusal forces.
There are four kinds of P.R.I., P-type, PS-type,PI-type, and PT-type. They are used according to the condition of the clinical case.
In conclusion, the type of P.R.I. is useful for prosthetic restoration of Anodontia.
