Yi Yang-Jin, Park In-Woo, Ku Jeong-Kui, Jo Deuk-Won, Han Jung-Suk, Kim Young-Kyun
Department of Prosthodontics, Section of Dentistry, Seoul National University Bundang Hospital, 82, Gumi-ro 173 beon-gil, Bundang-gu, Seongnam, Korea.
Department of Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, 101, Daehak-ro Jongno-gu, Seoul, Korea.
Sci Rep. 2021 Apr 12;11(1):7913. doi: 10.1038/s41598-021-87062-9.
The purpose of the retrospective study was to investigate the long-term result of implant-induced injury on the adjacent tooth. The subjects of this retrospective study were patients who had received implants and had tooth injury; direct invasion of root (group I), root surface contact (group II), or < 1 mm distance of the implant from the root (group III). Clinical and pathological changes were periodically examined using radiographs and intra-oral examinations. Paired t-tests and chi-square tests were used to evaluate the implant stability quotient (ISQ) of implant and tooth complications, respectively (α = 0.05). A total of 32 implants and teeth in 28 patients were observed for average 122.7 (± 31.7, minimum 86) months. Seven teeth, three of which were subsequently extracted, needed root canal treatment. Finally, 90.6% of the injured teeth remained functional. Complications were significant and varied according to the group, with group I showing higher events than the others. The ISQs increased significantly. One implant in group I resulted in osseointegration failure. The implant survival rate was 96.9%. In conclusion, it was found even when a tooth is injured by an implant, immediate extraction is unnecessary, and the osseointegration of the invading implant is also predictable.
这项回顾性研究的目的是调查种植体对邻牙造成损伤的长期结果。该回顾性研究的对象是接受过种植体植入且存在牙齿损伤的患者；包括牙根直接受侵（I组）、牙根表面接触（II组）或种植体与牙根距离<1mm（III组）。通过X线片和口腔内检查定期观察临床和病理变化。分别采用配对t检验和卡方检验评估种植体的种植体稳定性商数（ISQ）和牙齿并发症（α=0.05）。共观察了28例患者的32颗种植体和牙齿，平均观察时间为122.7（±31.7，最短86）个月。7颗牙齿需要进行根管治疗，其中3颗随后被拔除。最后，90.6%的受伤牙齿仍保持功能。并发症明显且因组而异，I组的并发症发生率高于其他组。ISQ值显著增加。I组中有1颗种植体发生骨结合失败。种植体存活率为96.9%。总之，研究发现即使牙齿受到种植体损伤，也无需立即拔除，侵入性种植体的骨结合情况也是可预测的。
