Section of Periodontology, Faculty of Odontology, University Complutense of Madrid, Madrid, Spain.
Faculty of Veterinary Lugo, University of Santiago de Compostela, Lugo, Spain.
J Clin Periodontol. 2017 Aug;44(8):842-853. doi: 10.1111/jcpe.12747. Epub 2017 Jul 26.
To study the healing of peri-implant tissues around implants with a triangular coronal third (test) or cylindrical (control).
In eight beagle dogs, immediate and delayed implants were placed. Test and control implants were randomly assigned and the hard and soft tissue healing was evaluated with histology and micro-CT analysis at 4 and 12 weeks. The soft tissue contour changes were assessed by image analysis software.
When measured at the implant shoulder level, the buccal crestal width (primary outcome assessed in mm) attained similar values in test and control implants. More apically (3 mm) test implants had greater buccal crestal width in delayed and immediate sites. For vertical soft and hard tissue measurements, no significant differences were found between Test and Control. Micro-CT evaluation of the buccal volume of interest showed less volume of implant component in T implants in all sites, although bone volume was not significantly different between T/C. Soft tissue contours were similar around T/C implants.
Triangular implants showed similar percentage of osseointegration, buccal bone volume and soft tissue contours, although attaining greater buccal crestal bone width. No differences were found in regard to soft tissue dimensions and the position of the first bone-to-implant contact.
研究具有三角形冠部第三部分（测试）或圆柱形（对照）的种植体周围种植体组织的愈合情况。
在 8 只比格犬中，立即和延迟植入物被放置。测试和对照植入物被随机分配，在第 4 周和第 12 周通过组织学和微 CT 分析评估硬组织和软组织愈合情况。使用图像分析软件评估软组织轮廓变化。
当在种植体肩台水平测量时，颊侧牙槽嵴宽度（以毫米为单位评估的主要结果）在测试和对照植入物中达到相似的值。在延迟和即刻部位，测试植入物的颊侧牙槽嵴宽度在根尖处（3 毫米）更大。对于垂直软组织和硬组织测量，测试和对照之间没有发现显著差异。对颊侧感兴趣容积的微 CT 评估显示，在所有部位，T 植入物中的植入物组件体积较小，但 T/C 之间的骨体积无显著差异。T/C 植入物周围的软组织轮廓相似。
尽管三角形种植体获得了更大的颊侧牙槽嵴骨宽度，但表现出相似的骨整合百分比、颊侧骨量和软组织轮廓。在软组织尺寸和第一骨-种植体接触位置方面没有发现差异。
