Abstract: Objective: To evaluate and analyze three-dimensional structure of bone around the pure titanium plasma-sprayed cylindrical endosseous implants by histomorphometric method. Methods: Bilateral mandibular teeth (P2 and P4) of two healthy adult beagle dogs were extracted. After three months, pure titanium plasma-sprayed cylindrical endosseous implants were implanted. Three months later, the dogs were sacrificed and the mandible were harvested, fixed, sliced, stained, photographed and digitized. Data were imported into computer to construct three-dimensional model and analyzed. Results: The average bone contact ratio(BCR) of the implant was (64.5±5.3)%, peaked at lingual direction and upper portion, bottomed at mesial or distal direction and bottom portion. The average BVR was (68.9±4.4)%, peaked at lingual 150-225μm zone and upper portion, bottomed at mesial or distal 0-75μm zone and bottom portion. Conclusion: The three-dimensional structure of bone around pure titanium plasma-sprayed cylindrical endosseous implants can be established. Implants can achieve good osseointegration, especially at lingual and upper portion with dense cortical bone.

Key words: Pure titanium plasma-sprayed, Implant , Animal experiments , Histomorphology, Analysis of three-dimensional structure