多凝聚螺纹设计的窄直径牙科种植体在有和没有骨凿的骨中的初期稳定性：一项体外研究。

Primary stability of narrow-diameter dental implants with a multiple condensing thread design placed in bone with and without osteotomes: An in vitro study.

机构信息

Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA.

Department of Oral Surgery and Implant Dentistry, School of Dentistry, Johann Wolfgang Goethe University, Frankfurt, Germany.

出版信息

Clin Implant Dent Relat Res. 2020 Jun;22(3):409-414. doi: 10.1111/cid.12908. Epub 2020 Apr 13.

DOI:10.1111/cid.12908

PMID:32285602

Abstract

BACKGROUND

The authors hypothesized that there is no difference in the primary stability (PS) of multiple condensing thread design (MCTD) implants placed in simulated type-IV bone with and without using osteotomes.

PURPOSE

This in vitro study assessed the PS of narrow-diameter dental implants with MCTD placed in simulated soft (type-IV) bone with and without using osteotomes.

MATERIALS AND METHODS

Sixty MCT-designed implants (diameter: 3.0 mm; length: 11.5 mm) were placed using 800 rpm drilling speed in cellular rigid polyurethane foam bone-blocks that simulated type-IV bone. Prior to placement, the implants were divided into three groups (20 implants per group) depending upon the protocol used for osteotomy preparation-Group-1: Conventional drilling (CD); Group-2: CD followed by osseous condensation using a chisel-shaped tapered osteotome with maximum diameter of 3 mm; and Group-3: CD followed by osseous condensation using a cylindrical osteotome with maximum diameter of 3 mm. Abutments were connected to all implants and PS was recorded using resonance frequency analysis (RFA) and the periotest (PTV). Group comparisons were performed using analysis and Bonferroni post-hoc adjustment tests. Level of significance was set at P < .05.

RESULTS

There was no statistically significant difference in the RFA values for the MCT-designed implants placed in groups 1, 2, and 3 (59.85 ± 0.72, 59.67 ± 0.76 and 59.42 ± 0.92, respectively). There was no statistically significant difference in the PTV values for MCT-designed implants in groups 1, 2, and 3 (1.655 ± 0.82, 1.405 ± 0.57, and 1.078 ± 0.63, respectively).

CONCLUSION

The MCTD implants with narrow diameters have a high PS in artificial soft bone in vitro. Due to the condensation effect of the thread design, there is no need for additional condensation of the peri-osteotomy bone in order to improve implant stability.

摘要

背景

作者假设，在不使用骨凿的情况下，使用多凝聚螺纹设计（MCTD）植入物在模拟的 IV 型骨中进行初次稳定性（PS）没有差异。

目的

本体外研究评估了具有 MCTD 的窄直径牙科植入物在使用和不使用骨凿的模拟软（IV 型）骨中的 PS。

材料和方法

在模拟 IV 型骨的细胞刚性聚氨酯泡沫骨块中，以 800rpm 的钻孔速度放置 60 个 MCT 设计的植入物（直径：3.0mm；长度：11.5mm）。放置前，根据骨切开术准备方案将植入物分为三组（每组 20 个植入物）-组 1：常规钻孔（CD）；组 2：CD 后用最大直径为 3mm 的锥形凿状骨凿进行骨凝聚；组 3：CD 后用最大直径为 3mm 的圆柱形骨凿进行骨凝聚。将基台连接到所有植入物上，并使用共振频率分析（RFA）和牙周测试（PTV）记录 PS。使用分析和 Bonferroni 事后调整检验进行组间比较。显著性水平设置为 P <.05。

结果

放置在组 1、2 和 3 的 MCT 设计植入物的 RFA 值没有统计学上的显著差异（分别为 59.85 ± 0.72、59.67 ± 0.76 和 59.42 ± 0.92）。放置在组 1、2 和 3 的 MCT 设计植入物的 PTV 值没有统计学上的显著差异（分别为 1.655 ± 0.82、1.405 ± 0.57 和 1.078 ± 0.63）。