Evaluation of mechanical strengths of three types of mini-implants in artificial bones

详细信息    查看全文

• 作者：Yu-Chuan Tseng^a ; ^b ; Ju-Hui Wu^c ; Chun-Chan Ting^a ; Hong-Sen Chen^c ; Chun-Ming Chen^a ; ^d ; ^{komschen@gmail.com}
• 关键词：Anchor area ; Infrazygomatic mini-implant ; Insertion torque ; Removal torque ; Resonance frequency
• 刊名：The Kaohsiung Journal of Medical Sciences
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：33
• 期：2
• 页码：96-101
• 全文大小：771 K
• 卷排序：33

文摘

We investigates the effect of the anchor area on the mechanical strengths of infrazygomatic mini-implants. Thirty mini-implants were divided into three types based on the material and shape: Type A (titanium alloy, 2.0 × 12 mm), Type B (stainless steel, 2.0 × 12 mm), and Type C (titanium alloy, 2.0 × 11 mm).The mini-implants were inserted at 90° and 45° into the artificial bone to a depth of 7 mm, without predrilling. The mechanical strengths [insertion torque (IT), resonance frequency (RF), and removal torque (RT)] and the anchor area were measured. We hypothesized that no correlation exists among the mechanical forces of each brand. In the 90° tests, the IT, RF, and RT of Type C (8.5 N cm, 10.2 kHz, and 6.1 N cm, respectively) were significantly higher than those of Type A (5.0 N cm, 7.7 kHz, and 4.7 N cm, respectively). In the 45° test, the RFs of Type C (9.2 kHz) was significantly higher than those of Type A (7.0 kHz) and Type B (6.7 kHz). The anchor area of the mini-implants was in the order of Type C (706 mm2) > Type B (648 mm2) > Type A (621 mm2). Type C exhibited no significant correlation in intragroup comparisons, and the hypothesis was accepted. In the 90° and 45° tests, Type C exhibited the largest anchor area and the highest mechanical strengths (IT, RF, and RT) among the three types of mini-implants. The anchor area plays a crucial role in the mechanical strength of mini-implants.