Departamento de Estomatología, Universitat de València, C/ Gascó Oliag 1, 46010 - Valencia (Spain),
Med Oral Patol Oral Cir Bucal. 2019 Sep 1;24(5):e643-e651. doi: 10.4317/medoral.22946.
To evaluate the changes in the peri-implant soft tissues of convergent collar implants with biologically oriented preparation technique (BOPT) crowns, 10 months after loading.
A pilot study was carried out from January 2016 to October 2017 involving 14 patients with one or two implants in the posterior mandibular sector. A total of 32 convergent collar implants were placed using a non-submerged protocol. Three months later the provisional cemented crowns were fitted using the BOPT approach with the finish line 1-1.5 mm below the gingival margin, simulating coronal emergence of a natural tooth. The soft tissue changes were measured with an intraoral scanner at two different timepoints: a) on the day of provisionalization, before prosthetic loading; and b) 10 months later without the provisional prosthesis. The STL files were superimposed and the soft tissue changes were recorded using a color scale with measurement of the volumetric changes in mm3.
A mean increase in peri-implant mucosal volume of 64.7 mm3 was observed in 29 implants. The zones with the greatest increase in soft tissue volume were the papillae of implants with adjacent teeth and the peri-implant buccal margin. Three implants showed a mean decrease in soft tissue volume of -25.1 mm3.
The fitting and design of crowns using the biologically oriented preparation technique (BOPT) over convergent collar implants affords a significant increase in peri-implant soft tissue volume both at the level of the papillae and in the buccal margin.
评估采用生物学导向预备技术（BOPT）的冠修复后，10 个月时种植体周围软组织的变化。
一项试点研究于 2016 年 1 月至 2017 年 10 月进行，共纳入 14 名患者，在下颌后牙区有一个或两个种植体。共植入 32 个会聚套管种植体，采用非埋入式方案。3 个月后，使用 BOPT 方法临时粘结冠，边缘线位于龈缘下 1-1.5mm 处，模拟天然牙的牙冠突度。软组织变化使用口内扫描仪在两个不同时间点进行测量：a）在临时修复体放置当天，在修复体加载之前；b）10 个月后，无临时修复体。使用 STL 文件叠加，并使用颜色比例尺记录软组织变化，测量 mm3 的体积变化。
在 29 个种植体中，观察到种植体周围黏膜体积平均增加 64.7mm3。软组织体积增加最大的区域是邻牙种植体的乳头和种植体颊侧边缘。3 个种植体的软组织体积平均减少了-25.1mm3。
采用生物学导向预备技术（BOPT）制作冠修复会聚套管种植体，可以显著增加种植体周围软组织的体积，无论是在乳头水平还是颊侧边缘。
