Hori M, Sato T, Kaneko K, Okaue M, Matsumoto M, Sato H, Tanaka H
Department of Oral and Maxillofacial Surgery, Nihon University School of Dentistry, Tokyo, Japan.
J Oral Sci. 2001 Jun;43(2):139-44. doi: 10.2334/josnusd.43.139.
In patients with extensive bone resorption, implant placement posterior to the mental foramen is a problematic surgical procedure. This paper reports the results in 6 patients (aged 20-61) with edentulous areas in the posterior part of the mandible, in whom 26 Nobelpharma implants were placed, including 17 with transposition of the inferior alveolar nerve allowing the use of implant fixtures of at least 10 mm in length. Subsequent neurosensory function, based on British Medical Research Council definitions, and implant survival rate were examined. In all cases, postoperative numbness occurred in the lower lip and mental area. Three years after surgery, while one patient had completely recovered neurosensory function, five patients still experienced partial numbness, although this was not perceived as a problem by those patients. The implant survival rate was 100% approximately three years after surgery. The results suggest that a higher implant survival rate is likely when longer fixtures are used, but this is also more likely to lead to slight long-term neurosensory dysfunction.
在广泛骨吸收的患者中，在下颌孔后方植入种植体是一项有问题的外科手术。本文报告了6例（年龄20 - 61岁）下颌后部无牙区患者的治疗结果，在这些患者中植入了26枚诺贝尔pharma种植体，其中17枚采用了下牙槽神经移位术，从而能够使用长度至少为10毫米的种植体基台。根据英国医学研究委员会的定义，对随后的神经感觉功能和种植体存活率进行了检查。所有病例术后下唇及颏部均出现麻木。术后三年，1例患者神经感觉功能完全恢复，5例患者仍有部分麻木，但这些患者并未将其视为问题。术后约三年种植体存活率为100%。结果表明，使用较长的种植体基台时种植体存活率可能更高，但这也更有可能导致轻微的长期神经感觉功能障碍。
