PDF(Pubmed)
Abstract：
Orthodontic mini-implants are devices used for anchorage in various orthodontic treatments. We conducted a pilot study which aimed to observe preliminary trends regarding the impact of heat treatment on the elastic modulus of Ti6Al4V alloy and stainless steel 316L mini-implants. The initial phase involved testing the impact of heat treatment on the mechanical properties of Ti6Al4V alloy and stainless steel 316L mini-implants.
METHODS: Ten self-drilling mini-implants sourced from two distinct manufacturers (Jeil Medical Corporation® and Leone®) with dimensions of 2.0 mm diameter and 10 mm length were tested. They were separated into two material groups: Ti6Al4V and 316L. Using the CETRUMT-2 microtribometer equipment, indentation testing was conducted employing a diamond-tipped Rockwell penetrator at a constant force of 4.5 N.
RESULTS: Slight differences were observed in the elastic modulus of the Ti6Al4V alloy (103.99 GPa) and stainless steel 316L (203.20 GPa) compared to natural bone. The higher elastic moduli of these materials indicate that they are stiffer, which could potentially lead to stress-shielding phenomena and bone resorption. Heat treatment resulted in significant changes in mechanical properties, including elastic modulus reductions of approximately 26.14% for Ti6Al4V and 24.82% for 316L, impacting their performance in orthodontic applications.
CONCLUSIONS: Understanding the effects of heat treatment on these alloys is crucial for optimizing their biomechanical compatibility and longevity in orthodontic treatment. To fully evaluate the effects of heat treatment on mini-implants and to refine their design and efficacy in clinical practice, further research is needed.
METHODS: Ten self-drilling mini-implants sourced from two distinct manufacturers (Jeil Medical Corporation® and Leone®) with dimensions of 2.0 mm diameter and 10 mm length were tested. They were separated into two material groups: Ti6Al4V and 316L. Using the CETRUMT-2 microtribometer equipment, indentation testing was conducted employing a diamond-tipped Rockwell penetrator at a constant force of 4.5 N.
RESULTS: Slight differences were observed in the elastic modulus of the Ti6Al4V alloy (103.99 GPa) and stainless steel 316L (203.20 GPa) compared to natural bone. The higher elastic moduli of these materials indicate that they are stiffer, which could potentially lead to stress-shielding phenomena and bone resorption. Heat treatment resulted in significant changes in mechanical properties, including elastic modulus reductions of approximately 26.14% for Ti6Al4V and 24.82% for 316L, impacting their performance in orthodontic applications.
CONCLUSIONS: Understanding the effects of heat treatment on these alloys is crucial for optimizing their biomechanical compatibility and longevity in orthodontic treatment. To fully evaluate the effects of heat treatment on mini-implants and to refine their design and efficacy in clinical practice, further research is needed.
摘要：
正畸微型植入物是在各种正畸治疗中用于锚固的装置。我们进行了一项初步研究，旨在观察热处理对Ti6Al4V合金和不锈钢316L微型植入物弹性模量的影响的初步趋势。初始阶段涉及测试热处理对Ti6Al4V合金和不锈钢316L微型植入物的机械性能的影响。
方法：测试了来自两个不同制造商（JeilMedicalCorporation®和Leone®）的10个直径为2.0mm，长度为10mm的自钻孔微型植入物。它们分离为两个材料组：Ti6Al4V和316L。使用CETRUMT-2微型摩擦计设备，在4.5N的恒力下使用金刚石尖端的Rockwell穿透器进行压痕测试。
结果:与天然骨相比,在Ti6Al4V合金(103.99GPa)和不锈钢316L(203.20GPa)的弹性模量方面观察到微小差异。这些材料的较高的弹性模量表明它们更坚硬，这可能会导致应力屏蔽现象和骨吸收。热处理导致机械性能发生显著变化，包括Ti6Al4V的弹性模量降低约26.14%，316L的弹性模量降低约24.82%，影响他们在正畸应用中的表现。
结论：了解热处理对这些合金的影响对于优化正畸治疗中的生物力学相容性和寿命至关重要。为了充分评估热处理对微型植入物的影响，并在临床实践中完善其设计和疗效，需要进一步的研究。
方法：测试了来自两个不同制造商（JeilMedicalCorporation®和Leone®）的10个直径为2.0mm，长度为10mm的自钻孔微型植入物。它们分离为两个材料组：Ti6Al4V和316L。使用CETRUMT-2微型摩擦计设备，在4.5N的恒力下使用金刚石尖端的Rockwell穿透器进行压痕测试。
结果:与天然骨相比,在Ti6Al4V合金(103.99GPa)和不锈钢316L(203.20GPa)的弹性模量方面观察到微小差异。这些材料的较高的弹性模量表明它们更坚硬，这可能会导致应力屏蔽现象和骨吸收。热处理导致机械性能发生显著变化，包括Ti6Al4V的弹性模量降低约26.14%，316L的弹性模量降低约24.82%，影响他们在正畸应用中的表现。
结论：了解热处理对这些合金的影响对于优化正畸治疗中的生物力学相容性和寿命至关重要。为了充分评估热处理对微型植入物的影响，并在临床实践中完善其设计和疗效，需要进一步的研究。
