Int J Oral Maxillofac Implants. 2020 Sep/Oct;35(5):974-981. doi: 10.11607/jomi.8328.
The aim of this retrospective clinical case series report was to evaluate the outcomes of patients who underwent zygomatic implant surgery with a recent technical modification of the extrasinus surgical protocol.
The implant system presented in this study had a novel designed unthreaded body with a 12.5-mm sharp threaded apical end for obtaining maximum retention to the zygomatic bone. A total of 92 patients with severely atrophic maxillae were included in this study. All the patients were treated with a modification of the extrasinus protocol for insertion of 261 zygomatic implants. The mean follow-up of the patients was 34.5 ± 17.1 (SD) months (range: 6 to 72 months). The implant survival rate was the primary outcome. The intraoperative and postoperative complications were evaluated as additional criteria for success.
The cumulative implant survival rate was 97.99%. Definitive or provisional prostheses were delivered on the same day of surgery, which resulted in an improvement in the quality of life of the patients. Five implants failed in four patients. No sinusitis or mucositis was seen in any of the patients. Eleven postoperative complications occurred in seven patients.
The novel zygomatic surgery protocol introduced in this study can be an effective alternative to augmentation procedures and conventional implants, especially in cases of extremely atrophic posterior maxillae.
本回顾性临床病例系列报告的目的是评估接受颧骨种植手术患者的治疗效果，这些患者采用了最近改进的窦外手术方案。
本研究中使用的种植系统具有新颖的无螺纹体设计，其尖锐的 12.5mm 螺纹根尖端可获得与颧骨的最大保留力。共有 92 名严重上颌骨萎缩的患者纳入本研究。所有患者均采用窦外方案的改良方法植入 261 个颧骨种植体。患者的平均随访时间为 34.5±17.1（SD）个月（范围：6 至 72 个月）。种植体存活率为主要结果。术中及术后并发症被评估为成功的附加标准。
累积种植体存活率为 97.99%。当天手术时就为患者提供了永久性或临时性修复体，这提高了患者的生活质量。4 名患者中有 5 个种植体失败。所有患者均未出现鼻窦炎或黏膜炎。7 名患者中发生了 11 例术后并发症。
本研究中引入的新型颧骨手术方案可作为增强程序和传统种植体的有效替代方案，尤其是在极度萎缩的后上颌骨病例中。
