Department of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Narayanapuram, Pallikaranai, Chennai, India.
Head of Department, Department of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Narayanapuram, Pallikaranai, Chennai, India.
J World Fed Orthod. 2020 Mar;9(1):13-17. doi: 10.1016/j.ejwf.2020.01.002. Epub 2020 Feb 13.
The aim of this study was to devise a modification of a temporary anchorage device (TAD) by coating titanium mini screw implants with yttrium stabilized zirconia and to evaluate the insertion torque and surface integrity of it.
Five titanium implants (Absoanchor, Dentos, South Korea) from each of the four groups comprising of 6 SH 13-08, 6 SH 13 -10 cylindrical and 6 SH 1312-08, 6 SH 1312-10 tapered mini screw implants were selected to be in the experimental group (Zr Ti) of implants, wherein they were coated with yttrium stabilised zirconia using a RF/DC magnetron sputtering unit. One mini screw implant from each of the four groups remained without coating to serve as control (Ti). After the coating of the titanium mini screw implants, scanning electron microscope (SEM) study was performed to evaluate the thickness and uniformity of the coating obtained. The insertion torque of all implants were evaluated by inserting the implant into bone sample using a manual torque wrench (ADIN). The implants were retrieved from the bone sample and a post insertion SEM study was performed to evaluate any changes in the surface of the Zr-Ti and Ti implants. X-ray diffraction (XRD) analysis was done to confirm the presence of Zirconia in the implants from the experimental group.
There was no statistically significant difference between the insertion torque for the zirconia coated mini screw implants and the titanium mini screw implants, where the P value < 0.05 was considered as statistically significant. The values for insertion torque for Zr Ti cylindrical group of 8 mm length ranged from 19-20 N-cm and that for the tapered group of 8 mm length ranged from 15-17 N-cm. The insertion torque for the Zr Ti tapered group of 8 mm ranged from 21-22 N-cm and that of the tapered group ranged from 16-18 N-cm.The insertion torque values for the Ti cylindrical implant for length of 8 mm was 20 N-cm and 21 N-cm for length of 10 mm. The insertion torque values for the Ti tapered implant was 15N-cm for 8 mm length and 16N-cm for 10 mm length.
The Zirconia coating on the Titanium mini screw implants was of 2.6 µm in thickness. There was no statistically significant difference in the insertion torque of the Zirconia coated mini screw implants and the non-coated titanium mini screw implants which retained their structural integrity.
本研究的目的是通过在钛微型螺钉种植体上涂覆钇稳定氧化锆来改进一种临时锚固装置（TAD），并评估其植入扭矩和表面完整性。
从每组的 6 个 SH 13-08、6 个 SH 13-10 圆柱形和 6 个 SH 1312-08、6 个 SH 1312-10 锥形微型螺钉种植体中各选择 5 个钛种植体（Absoanchor，Dentos，韩国），作为实验组（ZrTi）的种植体，使用射频/直流磁控溅射单元对其进行了钇稳定氧化锆涂层。每组中的一个微型螺钉种植体未进行涂层，作为对照组（Ti）。在钛微型螺钉种植体涂层后，通过扫描电子显微镜（SEM）研究评估获得的涂层的厚度和均匀性。使用手动扭矩扳手（ADIN）将种植体插入骨样本中，评估所有种植体的植入扭矩。从骨样本中取出种植体，进行植入后 SEM 研究，以评估 Zr-Ti 和 Ti 种植体表面的任何变化。进行 X 射线衍射（XRD）分析以确认实验组中种植体中存在氧化锆。
Zr 涂层微型螺钉种植体与 Ti 微型螺钉种植体的植入扭矩无统计学差异，P 值<0.05 被认为具有统计学意义。ZrTi 圆柱形 8mm 长度组的植入扭矩范围为 19-20 N-cm，而锥形 8mm 长度组的植入扭矩范围为 15-17 N-cm。ZrTi 锥形 8mm 长度组的植入扭矩范围为 21-22 N-cm，锥形组的植入扭矩范围为 16-18 N-cm。Ti 圆柱形 8mm 长度种植体的植入扭矩值为 20N-cm，10mm 长度种植体的植入扭矩值为 21N-cm。Ti 锥形种植体的植入扭矩值为 8mm 长度 15N-cm，10mm 长度 16N-cm。
Ti 微型螺钉种植体上的氧化锆涂层厚度为 2.6µm。Zr 涂层微型螺钉种植体和保持结构完整性的未涂层钛微型螺钉种植体的植入扭矩无统计学差异。
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