612 Theories and techniques of oral implantology

A

B

C

D

E

F

Fig. 14-6. A, Six different implants are seen in the same mouth. Left to right: Two Linkow titanium vent-plants, a narrow ridge (M. Chercheve) implant, a Chercheve spiral-shaft implant, a Muratori spiral implant, and a Sandhaus crystalline bone screw (aluminum oxide). The picture was taken immediately after the implants were placed. B, Three months later a breakdown of bone had started around the synthetic sapphire implant. C, Fourteen months postoperatively, the continued breakdown around the crystalline bone screw, but not around any of the others, is clearly shown. D, A blade-vent is acting as anchor tooth while the crystalline bone screw is anterior to it. Evidence of osteolysis is seen only around the anterior implant. E, Poorly trephined bone shows the holes around both implants made larger and deeper than their diameter. F, Two years later the bone has filled in around the deep portions of the vent-plant but not around the synthetic sapphire.