Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, Malmö, Sweden.
Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden.
Clin Oral Implants Res. 2022 Jan;33(1):78-93. doi: 10.1111/clr.13867. Epub 2021 Oct 12.
This randomised controlled trial compares the 3-year outcomes, that is, marginal bone-level (MBL) changes and clinical parameters, between an abutment-level (AL) and implant-level (IL) connection for implants with an internal conical connection (ICC) supporting a screw-retained fixed partial denture.
Fifty patients with 119 implants were randomly allocated to either the AL or IL group. Radiographic and clinical examinations were performed after one, two, and 3 years. A linear mixed model was used to evaluate the differences between groups.
The MBL change was not significantly different between the groups at any point. The MBL was 0.12 ± 0.31 mm (AL) and 0.23 ± 0.26 mm (IL) after 1 year; 0.15 ± 0.34 mm (AL) and 0.17 ± 0.22 mm (IL) after 2 years; 0.18 ± 0.39 mm (AL) and 0.15 ± 0.21 mm (IL) after 3 years. The bleeding on probing was 43.44 ± 39.24% (AL) and 58.19 ± 41.20% (IL) after 1 year; 35.78 ± 39.22% (AL) and 50.43 ± 41.49% (IL) after 2 years; 51.27 ± 44.63% (AL) and 49.57 ± 37.31% (IL) after 3 years and was significantly different (p = .025) between 1 and 2 years. The probing depth showed a significant difference at each time point while the plaque was not significant between the groups. The overall technical, biological and prosthetic complication rates were 5.04%, 3.36%, and 16.00%, respectively.
The MBL change was similar in the groups. The slight differences in the soft tissue complications between the groups are likely not of clinical relevance. An IL connection is considered to be a valid alternative to an AL set-up in ICC implants.
本随机对照试验比较了种植体采用内部锥形连接（ICC）支持螺丝固位固定修复体时，基台水平（AL）和种植体水平（IL）连接在 3 年的边缘骨水平（MBL）变化和临床参数方面的结果。
将 50 名患者的 119 个种植体随机分配至 AL 或 IL 组。分别在 1、2 和 3 年后进行影像学和临床检查。采用线性混合模型评估组间差异。
两组在任何时间点的 MBL 变化均无显著差异。1 年后，MBL 分别为 0.12±0.31mm（AL）和 0.23±0.26mm（IL）；2 年后分别为 0.15±0.34mm（AL）和 0.17±0.22mm（IL）；3 年后分别为 0.18±0.39mm（AL）和 0.15±0.21mm（IL）。探诊出血率在 1 年后分别为 43.44±39.24%（AL）和 58.19±41.20%（IL）；2 年后分别为 35.78±39.22%（AL）和 50.43±41.49%（IL）；3 年后分别为 51.27±44.63%（AL）和 49.57±37.31%（IL），在 1 年至 2 年之间差异具有统计学意义（p=0.025）。探诊深度在每个时间点均有显著差异，而菌斑在组间无显著差异。总的技术、生物学和修复体并发症发生率分别为 5.04%、3.36%和 16.00%。
两组的 MBL 变化相似。两组软组织并发症的轻微差异可能无临床意义。IL 连接被认为是 ICC 种植体中 AL 装置的有效替代方案。
