新型人工牙根系統於高扭力承載下之有限元素分析與生物力學研究

本研究以有限元素分析方法探討二件式人工牙根於不同扭力作用下，牙科植體與齒槽骨之間的影響及應力分布情形，並選用直徑3.5 mm之國維人工牙根系統進行模擬分析以及扭力試驗。結果顯示同一長度之牙科植體與齒槽骨會隨著扭力增加，而使得等效應力增加，研究中以設定最高扭力值為75 N-cm之分析結果顯示，以長度8.8 mm之植體表現出的等效應力值最大為678.2 MPa，但其最大等效應力值仍小於鈦金屬之降伏強度，能確保材料不會產生形變現象；長度13.5 mm以上尺寸之牙科植體於等效應力表現則明顯比最大等效應力降低51.88 %以上。在實測扭力試驗之結果顯示國維人工牙根(???n3.5 mm × L13.5 mm)之扭斷強度為217.39 ± 78.44 N-cm，由模擬分析結果同樣可證明國維人工牙根能有效承載高扭力，且不影響植體周圍齒槽骨之結構。

關鍵字

人工牙根；有限元素分析；扭力試驗

並列摘要

In the present study, the finite element analysis method was adopted for simulation thestress distributionand effect betweendental implant and alveolar boneof Dr. Wells two pieces dental implant system with diameter of O3.5 mm(GWOWEI TECHNOLOGY CO., LTD) under torsion test. The results indicated that the equivalent stress (Von Mises stress σeqv) of the implant system increasing with the torsion force increased. Under the maximum torsion 75 N-cmanalyses, it revealed that the dental implant with the length of 8.8 mm exhibited a maximumis678.2MPa. But, the equivalent stress is less than of the yield strength of pure titanium implant which can ensure will not generate deformation. As the implant with the length above 13.5 mm, the equivalent stressof dental implantperformance significantly lower than the maximum equivalentstressofpure titanium implant about 51.88%. The measured torque test results displayed that thetorque stress of Dr. Wells dental implant system with dimension of O3.5 mm × 13.5 mm) is approximately 217.39 ± 78.44 N-cm. Therefore, the simulation analysis results also demonstrated that the Dr. Wells dental implant system can effectively withstand the high torque force, and does not affect the structure of the alveolar bone around implants.

並列關鍵字

Dental implant ； Finite element analysis ； Torsion test

參考文獻

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[2] Adell R, Eriksson B, Lekholm U, Branemark PI, Jemt T. Long-term follow-upstudy of osseointegrated implants in the treatment of totally edentulous jaws.Int J Oral Maxillofac Implants 1990;5(4):347-59.

[3] Adell R, Lekholm U, Rockler B, Branemark PI. A 15-year study ofosseointegrated implants in the treatment of the edentulous jaw. Int J Oral Surg1981;10(6):387-416.

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新型人工牙根系統於高扭力承載下之有限元素分析與生物力學研究

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