Department of Neurosciences, School of Dentistry, University of Padova, Padova, Italy.
Department of Civil, Environmental and Architectural Engineering, University of Padova, Padova, Italy.
Clin Oral Implants Res. 2021 Mar;32(3):324-336. doi: 10.1111/clr.13702. Epub 2021 Jan 8.
Implantoplasty (IP) is a treatment option for peri-implantitis. Mechanical concerns were raised on fracture resistance of implants subjected to this procedure. This study aimed to compare two methods of IP in terms of implant wear and fracture resistance, and of surface topography.
Eighteen cylindrical screw-shaped dental implants (4 mm diameter, 13 mm length) with an external hexagonal connection were used. IP was performed on the first 6-mm implant surface with a sequence of burs or diamond sonic tips, both followed by an Arkansas finishing. IP duration and implant weight variation were recorded. Micro-computed tomography (micro-CT) was used to evaluate material loss. Implant fracture resistance was assessed by static compression test. Surface topography analysis was performed with a stylus profilometer. Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) was applied for implant surface morphology and elemental characterization.
Micro-CT showed less material loss in sonic compared to burs. No statistically significant difference was found between the mean fracture resistance values reached in bur and sonic, both followed by Arkansas, and with respect to control. IP performed with burs led to a smoother surface compared to sonic. Equivalent final surface roughness was found after Arkansas in both IP procedures. SEM-EDS showed a deburring effect associated to sonic and revealed carbon and aluminum peaks attributable to contamination with sonic diamond tips and Arkansas bur, respectively.
IP with sonic diamond tips was found to be more conservative in terms of structure loss. This could have a clinical relevance in case of narrow-diameter implants.
种植体周围炎的治疗选择之一是种植体整形术（IP）。有人对该程序下种植体的抗断裂能力提出了机械方面的担忧。本研究旨在比较两种 IP 方法在种植体磨损和抗断裂能力以及表面形貌方面的差异。
使用了 18 个带有外部六方连接的圆柱形螺丝状牙科种植体（直径 4mm，长度 13mm）。用球钻或金刚石超声尖的顺序对前 6mm 种植体表面进行 IP，然后均进行阿肯色州修整。记录 IP 持续时间和种植体重量变化。使用微计算机断层扫描（micro-CT）评估材料损失。通过静态压缩试验评估种植体抗断裂能力。使用触针轮廓仪进行表面形貌分析。扫描电子显微镜-能谱（SEM-EDS）用于种植体表面形貌和元素特征分析。
micro-CT 显示超声法比球钻法的材料损失更少。球钻和超声法（均经阿肯色州修整）与对照组相比，其平均抗断裂值之间无统计学差异。与超声法相比，球钻法进行 IP 导致表面更光滑。两种 IP 方法经阿肯色州修整后，最终表面粗糙度相当。SEM-EDS 显示超声法具有去毛刺效果，并显示出与超声金刚石尖和阿肯色州球钻相关的碳和铝峰值，分别为污染所致。
与球钻相比，超声金刚石尖的 IP 方法在结构损失方面更为保守。在直径较窄的种植体情况下，这可能具有临床意义。
