Surgical Procedure for Mandibular Reconstruction using Apatite Porous Block

1）磷灰石多孔块成骨的动物实验用两种不同材料和三种不同孔径（80%、60%和40%）的种植体材料在日本猴体内进行成骨实验，虽然两种材料和三种不同孔径的种植体材料在成骨方面没有显著差异，具有最大孔隙（80%）的材料在研究早期注意到的软组织侵入形成方面最有利。2）临床应用a）下颌骨节段性切除后的充填使用磷灰石多孔块结合纯钛板进行下颌骨节段性缺损的修复，接骨机制根据患者的临床病程，该手术提供了良好的钢板固定和继发性骨形成。3）接受该<99m>手术的患者的TC骨密度图研究所有病例的骨密度图均显示术后骨生成，证实骨密度图所见可作为骨生成的指标。然而，观察到不同年龄、接受不同剂量放疗和不同类型化疗的个体患者的骨生成差异。

SURGICAL PROCEDURE FOR MANDIBULAR RECONSTRUCTION USING APATITE POROUS BLOCK1) An animal study of osteogenesis with Apatite Porous BlocksOsteogenesis using implant materials two different kinds and three different pore sizes, 80%, 60%, and 40%, was investigeted in japanese monkey.Although no significant difference in bone formation were observed among two materials and three different porous types, the materials with the largestpore (80%) was most advantageous in terms of intrusive formation of soft tissues that was noted in the early period of the study.2) Crinical applicationa) Filling after segmental mandibular resectionSegmental mandebular defects were reconstructed using apatite porous blocks conjunction with a pure titanium plate that works by a compression osteosynthesis mechanism. According to the clinical course of patient, this procedure provided good plate fixation and secondary bone formation.3) ^<99m>TC bone scintigraphic study in patients who underwent the prosedureThe bone scintigrams revealed postoperative osteogenesis in all cases, confirming that bone scintigraphic findings may be used as an index of osteogenesis.However, differences in osteogenesis among individual patients of different ages and who underwent different amounts of radiation and different types of chemotherapy were observed.