Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
Department of Prosthodontics, Faculty of Odontology, Malmoe University, Malmo, Sweden.
Clin Exp Dent Res. 2023 Jun;9(3):425-436. doi: 10.1002/cre2.750. Epub 2023 May 17.
The aim of this study was to investigate the association of the Mucosal Emergence Angle (MEA) with peri-implant tissue mucositis.
Forty-seven patients with 103 posterior bone level implants underwent clinical and radiographic examination. Three-dimensional data from Cone Bean Computer Tomography and Optica Scan were transposed. Three angles were defined: MEA, Deep Angle (DA) and Total Angle (TA) and measured at six sites for each implant.
There was a significant correlation between MEA and Bleeding on Probing for all sites with an overall odds ratio of odd ratio 1.07 (95% confidence interval [CI] 1.05-1.09, p < 0.001). Sites with MEA ≥ 30°, 40°, 50°, 60°, and 70° had a higher risk for bleeding with an odds ratio of 3.1, 5, 7.5, 11.4 and 33.55, respectively. When all 6 sites of an implant prostheses had MEA ≥ 40°, the risk of having bleeding at all 6 sites was 9.5 times higher (95% CI 1.70-52.97, p = 0.010).
Maintaining MEA no wider than 30°-40° is advisable, while the aim should be to keep this angle as narrow as clinically feasible. Registered in Thai Clinical Trials Registry: http://www.thaiclinicaltrials.org/show/TCTR20220204002.
本研究旨在探讨黏膜突角（MEA）与种植体周围组织黏膜炎的关系。
47 名患者共 103 枚后牙区骨水平种植体接受了临床和影像学检查。将 Cone Bean 计算机断层扫描和 Optica Scan 的三维数据进行转换。定义了三个角度：MEA、深角（DA）和总角（TA），并在每个种植体的六个位点进行测量。
MEA 与探诊出血在所有位点均呈显著相关，总体比值比为 1.07（95%置信区间[CI] 1.05-1.09，p<0.001）。MEA≥30°、40°、50°、60°和 70°的位点探诊出血的风险更高，比值比分别为 3.1、5、7.5、11.4 和 33.55。当一个种植体的 6 个位点的 MEA 均≥40°时，所有 6 个位点探诊出血的风险增加 9.5 倍（95%CI 1.70-52.97，p=0.010）。
建议保持 MEA 不超过 30°-40°，并应尽可能保持此角度狭窄。于 2022 年 2 月 4 日在泰国临床试验注册中心注册，注册号为 TCTR20220204002。
