Department of Dentistry, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
J Oral Implantol. 2021 Jun 1;47(3):236-241. doi: 10.1563/aaid-joi-D-19-00210.
This study aimed to evaluate bone regeneration within infected extraction sockets with bone defects using cone-beam computed tomography (CBCT) at a 1-year follow-up after implant placement in a prosthetically driven implant position. Forty-eight patients requiring premolar or molar tooth extraction due to bone defects caused by periodontal diseases were included. Vertical and horizontal bone volumes were assessed by overlapping the CBCT scan images with the full digital process. At 1-year post-extraction, a prosthetically-driven implant was planned using virtual implant planning software. At 1 year after extraction, CBCT revealed significant horizontal and vertical bone gains; an overall mean buccolingual bone width gain of 5.46 ± 2.87 mm, and an overall mean vertical bone gain of 0.27 ± 1.28 mm for the lingual bone plate level and 3.50 ± 1.81 mm for the buccal bone plate level were observed. Except for 4 (out of 48) sites, implants were virtually positioned in the center of the edentulous spaces. In summary, despite the dimensional changes after tooth extraction in compromised posterior sockets, there was sufficient bone for placing an implant using the prosthetically driven approach.
本研究旨在通过锥形束 CT（CBCT）评估牙周病导致骨缺损的拔牙窝内的骨再生情况，并在种植体植入后 1 年进行随访。共纳入 48 例因牙周病导致骨缺损而需拔除前磨牙或磨牙的患者。通过将 CBCT 扫描图像与全数字处理进行重叠，评估垂直和水平骨量。在拔牙后 1 年，使用虚拟种植体规划软件进行种植体驱动的种植体规划。拔牙后 1 年，CBCT 显示出明显的水平和垂直骨增量；颊侧骨板水平的总体平均颊舌向骨宽度增加了 5.46 ± 2.87mm，舌侧骨板水平的总体平均垂直骨增加了 0.27 ± 1.28mm，而颊侧骨板水平的总体平均垂直骨增加了 3.50 ± 1.81mm。除了 4 个（48 个中的 4 个）部位外，种植体被虚拟定位在无牙颌空间的中心。总之，尽管拔牙后在后牙部位的牙槽窝中存在尺寸变化，但仍有足够的骨量可以通过种植体驱动的方法进行种植。
