口腔颌面外科杂志
口腔頜麵外科雜誌
구강합면외과잡지
CHINESE JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY
2014年
5期
364-369
,共6页
种植体直径%种植体长度%直径长度比%相关度%有限元分析
種植體直徑%種植體長度%直徑長度比%相關度%有限元分析
충식체직경%충식체장도%직경장도비%상관도%유한원분석
dental implants diameter%dental implants length%diameter-length ratio%relevancy%finite element analysis
目的：探讨直径与长度连续变化时选择种植体尺寸的方法。方法：运用Pro/E和ANSYS软件建立不同长度(7~16 mm)、不同直径(3~6 mm)的三维有限元模型，施加垂直荷载和侧向荷载，观察种植体位移峰值和骨组织Von-Mises应力峰值等评估指标。结果：垂直或侧向荷载作用下，随着直径和长度的增大，各评估指标均明显下降(60%~80%)，相关度分析显示，两种荷载下直径的影响均较大(约90%)，长度的影响与荷载有关(垂直荷载：18%~60%；侧向荷载：<7%)。直径-长度比兼顾种植体直径与长度，当确定皮质骨承载力及安全系数，便可由直径-长度关系曲线选择合适的种植体直径与长度。结论：种植体直径与长度均可明显影响种植体位移和骨组织应力峰值。本文介绍的直径长度比法可为临床医生选择、优化种植体提供一种新的思路。
目的：探討直徑與長度連續變化時選擇種植體呎吋的方法。方法：運用Pro/E和ANSYS軟件建立不同長度(7~16 mm)、不同直徑(3~6 mm)的三維有限元模型，施加垂直荷載和側嚮荷載，觀察種植體位移峰值和骨組織Von-Mises應力峰值等評估指標。結果：垂直或側嚮荷載作用下，隨著直徑和長度的增大，各評估指標均明顯下降(60%~80%)，相關度分析顯示，兩種荷載下直徑的影響均較大(約90%)，長度的影響與荷載有關(垂直荷載：18%~60%；側嚮荷載：<7%)。直徑-長度比兼顧種植體直徑與長度，噹確定皮質骨承載力及安全繫數，便可由直徑-長度關繫麯線選擇閤適的種植體直徑與長度。結論：種植體直徑與長度均可明顯影響種植體位移和骨組織應力峰值。本文介紹的直徑長度比法可為臨床醫生選擇、優化種植體提供一種新的思路。
목적：탐토직경여장도련속변화시선택충식체척촌적방법。방법：운용Pro/E화ANSYS연건건립불동장도(7~16 mm)、불동직경(3~6 mm)적삼유유한원모형，시가수직하재화측향하재，관찰충식체위이봉치화골조직Von-Mises응력봉치등평고지표。결과：수직혹측향하재작용하，수착직경화장도적증대，각평고지표균명현하강(60%~80%)，상관도분석현시，량충하재하직경적영향균교대(약90%)，장도적영향여하재유관(수직하재：18%~60%；측향하재：<7%)。직경-장도비겸고충식체직경여장도，당학정피질골승재력급안전계수，편가유직경-장도관계곡선선택합괄적충식체직경여장도。결론：충식체직경여장도균가명현영향충식체위이화골조직응력봉치。본문개소적직경장도비법가위림상의생선택、우화충식체제공일충신적사로。
[Abstrat] Objective: The aim of this study was to discuss the methodology of selecting implant with continuous changes of diameter and length. Methods: The Pro/engineering software was used to created 3-D models of dental implants with different diameters (3 mm~6 mm) and length (7 mm~16 mm), being assembled to 3-D models of mandible bone segments, which were imported into ANSYS finite element analysis software and meshed to create finite models. The values of dis-placement and Von-Mises stress of implant and bone were obtained, after models were loaded with vertical force and oblique load. Results: After models were loaded both by vertical and oblique loads, with the increase of implant diameter and length, the values of each evaluation indicators were significantly reduced (60%~80%). Effect of implant diameter was more significant (≈90%), the implant length was related to the types of loading (vertical force: 18%~60%;oblique load: <7%). The ratio construed by diameter and length was used for the selection of dental implants when safety factor was de-termined. Conclusion: Increasing the implant diameter and length can significantly reduce the displacement of implant and stress of bone tissue. Introduction of methodology of diameter-length ratio establishes a new practical and effective method for implants selection in clinical practices.
