Department of Implantology, The Affiliated Stomatology Hospital of Zhejiang University, Hangzhou, China.
Department of Oral Implantology and Prosthetic Dentistry, Academic Center of Dentistry (ACTA), Move Research Institute, University of Amsterdam and VU University, Louisiana, Amsterdam, The Netherlands.
Clin Implant Dent Relat Res. 2019 Jun;21(3):503-509. doi: 10.1111/cid.12787. Epub 2019 May 6.
The perfect position and axis of an implant is often limited by the morphology of the alveolar ridge, especially in Asians.
The aim of this study was to investigate the frequency at which ideal implant placement position in the anterior maxilla of Chinese Asians would require facial bone augmentation given by an initial facial bone profile.
Implants were virtually placed in 303 sites without tooth loss in the anterior maxilla. The incidence and characters of implant facial plate fenestration were analyzed. If there was no facial fenestration, the thinnest buccal plate (TB) amount adjacent to the implant was measured and recorded.
A total of 79 (26.07%) sites showed fenestrations. The mean length, width, and area of exposure in the fenestration sites were 2.94 ± 1.67 mm, 1.52 ± 0.97 mm, and 2.84 ± 3.13 mm , respectively. In the nonfenestrated sites, the TB of facial bone around the virtual implants was 1.10 ± 0.78 mm. Among the 224 nonfenestrated sites, 126 sites had a TB of less than 1 mm.
It can be concluded that the initial facial bone profile should be considered when designing restorations and choosing an optimal implant position in the anterior maxilla.
种植体的理想位置和轴往往受到牙槽嵴形态的限制，尤其是在亚洲人群中。
本研究旨在探讨在不考虑初始面骨轮廓的情况下，理想的种植体在前上颌骨中的位置需要进行多少面骨增量。
在 303 个无缺牙的上前牙槽嵴部位虚拟植入种植体。分析种植体颊侧骨板开窗的发生率和特点。如果没有颊侧骨板开窗，则测量并记录与种植体相邻的最薄颊侧骨板（TB）的厚度。
共 79 个（26.07%）部位出现开窗。开窗部位的平均暴露长度、宽度和面积分别为 2.94±1.67mm、1.52±0.97mm 和 2.84±3.13mm。在非开窗部位，虚拟种植体周围面骨的 TB 厚度为 1.10±0.78mm。在 224 个非开窗部位中，有 126 个部位的 TB 厚度小于 1mm。
可以得出结论，在设计修复体和选择前上颌最佳种植体位置时，应考虑初始面骨轮廓。
