Galindo-Moreno Pablo, Concha-Jeronimo Ada, Lopez-Chaichio Lucia, Rodriguez-Alvarez Roque, Sanchez-Fernandez Elena, Padial-Molina Miguel
Department of Oral Surgery and Implant Dentistry, School of Dentistry, University of Granada, 18071 Granada, Spain.
Research Group in Oral Biology and Regeneration (CTS-1028), Junta de Andalucia, 18071 Granada, Spain.
J Clin Med. 2021 Nov 20;10(22):5427. doi: 10.3390/jcm10225427.
The aim of this study was to analyze the differences in terms of the marginal bone level (MBL) around implants with either an internal conical or an internal hexagonal implant-prosthesis connection. A randomized clinical trial included patients in need of a single implant-supported restoration. The implant-prosthesis connection was either internal conical or internal hexagonal while maintaining the same type of implant macro- and microarchitecture. Clinical and radiographical variables were registered up to 12 months of follow-up, including MBL. A total of 30 patients were included in the study. The main outcome variable, MBL 12 months after prosthesis delivery, was statistically different in both groups: -0.25 (0.12) vs. -0.70 (0.43) (conical vs. hexagonal; = 0.033). Differences were also observed at the 3- and 6-month follow-up visits as well as for the MBL change from prosthesis delivery to the 12-month follow-up (-0.15 (0.13) vs. -0.56 (0.44); conical vs. hexagonal; = 0.023). Correlations between MBL around the implants and radiographic measurements on the adjacent teeth, buccal bone to implant, tissue thickness or keratinized tissue were not significant neither globally nor when analyzed independently by group. In view of such results, it can be concluded that single-unit restorations with internal hexagonal-connection implants induce higher marginal bone loss after 12 months of follow-up from prosthesis delivery than internal conical-connection implants.
本研究的目的是分析采用内锥形或内六角形种植体-修复体连接方式的种植体周围边缘骨水平（MBL）的差异。一项随机临床试验纳入了需要单颗种植体支持修复的患者。种植体-修复体连接方式为内锥形或内六角形，同时保持种植体的宏观和微观结构类型相同。在长达12个月的随访中记录临床和影像学变量，包括MBL。共有30名患者纳入本研究。主要观察变量，即修复体交付后12个月时的MBL，在两组中具有统计学差异：-0.25（0.12）对比-0.70（0.43）（锥形对比六角形；P = 0.033）。在3个月和6个月的随访中以及从修复体交付到12个月随访期间的MBL变化方面也观察到差异（-0.15（0.13）对比-0.56（0.44）；锥形对比六角形；P = 0.023）。种植体周围的MBL与相邻牙齿的影像学测量、种植体颊侧骨、组织厚度或角化组织之间的相关性，无论是总体上还是按组独立分析时均无显著意义。鉴于这些结果，可以得出结论，从修复体交付开始随访12个月后，采用内六角形连接种植体的单单位修复体比内锥形连接种植体导致更高的边缘骨丢失。
