To compare tissue response to two implant systems, featuring internal hexed connections with different designs. Patients enrolled in this randomized controlled trial were assigned to two groups. In Group 1, patients were treated with implants with a 5° conical internal hexed connection (Anyridge®, MegaGen, South Korea). In Group 2, patients were treated with implants with an internal hexed connection (Core®, Kristal, Italy). After implant placement and a provisionalisation period of 12 months, impressions were taken, stone casts were poured and digitised with a desktop scanner (D700®, 3Shape, Copenhagen, Denmark). In a digital environment, for each fixture, two values were collected at the buccal zenith: the height of the peri-implant mucosa (mucosal height; MH), calculated from the vestibular shoulder of the implant analogue to the upper gingival margin of the supra-implant tissue; and the width of the peri-implant mucosa (mucosal thickness; MT), calculated from the vestibular shoulder of the analogue to the external mucosa point perpendicular to the implant major axis. The mean and standard deviation for MH and MT, as well as their ratios, were calculated for each group; the sectors in which the implants were placed were also considered. Finally, correlation between MH, MT, connection type and sector was assessed by Pearson’s correlation coefficient, with significance level set at 0.05, and a confidence interval (CI) set at 95%. Data deriving from 188 implants placed in 104 patients were evaluated. The mean MH values were 3.32 (± 0.12) and 2.70 (± 0.16) mm for Groups 1 and 2, respectively. The mean MT values were 4.37 (± 0.16) and 3.93 (± 0.18) mm for Groups 1 and 2, respectively. Group 1 showed higher MH and MT values and a better ratio (1.50 ± 0.88) than Group 2 (1.81 ± 1.20). The MH, MT and MH/MT ratio were significantly influenced both by sector (p = 0.015) and group (p = 0.047). Within the limits of this study, the 5° connection implants supported a more extended tissue height and thickness at the buccal zenith, and a better ratio between them. This study was retrospectively registered in Clinicaltrials.gov, with number NCT04160689, dated 13/11/2019.

中文翻译：

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种植体-基台连接对颊天顶组织高度与厚度之比的影响：一项针对104位患者的188个种植体的随机对照试验。

为了比较组织对两个植入系统的反应，这两个系统具有不同设计的内部六角形连接。参加这项随机对照试验的患者分为两组。在第1组中，患者接受了带有5°锥形内六角连接的植入物治疗（Anyridge®，MegaGen，韩国）。在第2组中，患者接受了带有内部六角形连接件的植入物治疗（Core®，意大利克里斯塔尔）。放置植入物并临时安置12个月后，进行压模，浇铸石铸件，并使用台式扫描仪（D700®，3Shape，哥本哈根，丹麦）进行数字化。在数字环境中，对于每个固定装置，在颊天顶收集了两个值：种植体周围黏膜的高度（黏膜高度； MH），从种植体类似物的前庭肩到种植体上组织的上龈缘进行计算；从类似物的前庭肩到垂直于植入物主轴线的外部黏膜点计算的植入物周围黏膜的宽度（黏膜厚度； MT）。计算每组的MH和MT的平均值和标准差及其比率。还考虑了放置植入物的扇区。最后，通过Pearson相关系数评估MH，MT，连接类型和扇区之间的相关性，显着性水平设置为0.05，置信区间（CI）设置为95％。评估了来自104位患者的188个植入物的数据。第一组和第二组的MH平均值分别为3.32（±0.12）mm和2.70（±0.16）mm。第一组和第二组的平均MT值分别为4.37（±0.16）mm和3.93（±0.18）mm。第1组比第2组（1.81±1.20）表现出更高的MH和MT值，以及更好的比率（1.50±0.88）。MH，MT和MH / MT比值受部门（p = 0.015）和组（p = 0.047）的影响很大。在这项研究的范围内，5°连接植入物支持颊天顶处更大的组织高度和厚度，以及它们之间更好的比率。该研究回顾性注册于Clinicaltrials.gov，编号为NCT04160689，日期为2019年11月11日。047）。在这项研究的范围内，5°连接植入物支持颊天顶处更大的组织高度和厚度，以及它们之间更好的比率。该研究回顾性注册于Clinicaltrials.gov，编号为NCT04160689，日期为2019年11月11日。047）。在这项研究的范围内，5°连接植入物支持颊天顶处更大的组织高度和厚度，以及它们之间更好的比率。该研究回顾性注册于Clinicaltrials.gov，编号为NCT04160689，日期为2019年11月11日。