The clarification of the mechanisms of peri-implant bone resorption caused by the mechanical stress and the proposal of proper shape of the implant body

• Project/Area Number: 23659903
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Prosthetic dentistry
• Research Institution: Kyushu University
• Principal Investigator: KOYANO Kiyoshi 九州大学, 歯学研究院, 教授 (50195872)
• Co-Investigator(Kenkyū-buntansha): AYUKAWA Yasunori 九州大学, 大学病院, 講師 (50304697)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: インプラント / オーバーロード / 骨吸収 / 応力

Research Abstract

This study was performed to clarify the effect of stress distribution around periimplantbone on the localization of osteoclast. Histological observation revealed that osteoclasts were observed not only at the perimeter of the periimplant bone, but also between the implant body and periimplant bone. The presence of countersink and the differences of thread pitch and the thread angle greatly affected the maximum stress value at the periimplant bone. No apparent relationship was indicated between the periimplantstress distribution and osteoclast localization.