Patil Ratnadeep, den Hartog Laurens, Dilbaghi Anjali, de Jong Bart, Kerdijk Wouter, Cune Marco S
Department of Clinical Dentistry, Smile Care®, Mumbai, India.
Department of Oral & Maxillofacial Surgery and Special Dental Care, University Medical Center, The University of Groningen, Groningen, The Netherlands.
Clin Oral Implants Res. 2016 Dec;27(12):1506-1510. doi: 10.1111/clr.12594. Epub 2015 Apr 6.
To evaluate the influence of abutment geometry on papillary fill in the esthetic zone in a delayed crown protocol.
Twenty-six subjects received two non-adjacent endosseous implants in the esthetic zone. Functional temporary crowns were installed 17-19 weeks later, using conventional (control) and curved (experimental) abutments. The abutments were randomized in each patient independently. Final crowns were cemented after 2 months (T0). Standard intraoral photographs and radiographs were made to evaluate papillary fill after 12 months (T12). The interproximal papilla fill was measured by means of the papilla index score (PIS) and related to the maximum bone level between the implant and the adjacent root as well as the peri-implant marginal bone level at T12, both measured radiographically.
No statistically significant difference between the experimental and the control group could be demonstrated (P = 0.25). Ordinal regression analysis showed a positive correlation between the maximum bone level and papilla fill (P < 0.01) and a negative correlation between the peri-implant marginal bone level and papilla fill (P < 0.05).
A concave abutment does not exhibit a better fill of the papilla compared with a straight abutment in single-tooth implant placement using a delayed protocol in the esthetic zone after 12 months of function.
在延期牙冠修复方案中，评估基台几何形状对美学区乳头充盈情况的影响。
26名受试者在美学区植入两颗不相邻的骨内种植体。17 - 19周后安装功能性临时牙冠，分别使用传统（对照）基台和弧形（实验）基台。每个患者的基台随机分配。2个月后（T0）粘结最终牙冠。在12个月后（T12）拍摄标准口腔内照片和X光片，以评估乳头充盈情况。通过乳头指数评分（PIS）测量邻间隙乳头充盈情况，并与种植体和相邻牙根之间的最大骨水平以及T12时种植体周围边缘骨水平相关，两者均通过X光片测量。
实验组与对照组之间未显示出统计学上的显著差异（P = 0.25）。有序回归分析显示，最大骨水平与乳头充盈呈正相关（P < 0.01），种植体周围边缘骨水平与乳头充盈呈负相关（P < 0.05）。
在美学区采用延期方案进行单颗牙种植时，使用弧形基台与使用直形基台相比，在12个月功能期后，乳头的充盈情况并无更好表现。
