Second Dental Clinic, Department of Oral Implantology, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, National Clinical Research Center of Stomatology, Shanghai, China.
Department of Prosthodontics, Shanghai Ninth People's Hospital Affiliated with Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Clin Oral Implants Res. 2018 Jul;29(7):679-687. doi: 10.1111/clr.13259. Epub 2018 May 17.
The purpose of this retrospective study was to evaluate the long-term changes in the thickness of Schneiderian membranes after zygomatic implant placement using cone beam computed tomography (CBCT).
Twenty-five consecutive patients were included in this study. All the patients underwent bilateral zygomatic implant placement. Schneiderian membrane thickness (SMT) in 49 maxillary sinuses (one sinus was not included because of early loss of the zygomatic implants) was measured using CBCT before and at least 1 year after zygomatic implant placement. Ostium patency of each sinus was also evaluated and recorded.
In total, 84 zygomatic implants and 30 regular implants were placed in included patients. Two unilateral maxillary zygomatic implants in one patient were removed 2 months after implant placement. The SMT increased from 1.03 mm (inter-quartile range: 1.57 mm) to 1.33 mm (inter-quartile range: 1.98 mm) after a median follow-up time of 23.00 months (inter-quartile range: 14 months), and the difference was statistically significant. Before zygomatic implant insertion, 24.5% (12/49) of sinuses had SMT greater than 2 mm, whereas this value was 28.6% (14/49) after zygomatic implant placement. The percentage of sinuses observed with ostium patency also increased from 2.0% (1/49) to 12.2% (6/49).
Chronic Schneiderian membrane thickening could result from zygomatic implant insertion. Intensive postoperative care and clinical and radiographic monitoring are recommended after zygomatic implant placement.
本回顾性研究旨在通过锥形束计算机断层扫描（CBCT）评估颧骨种植体植入后施莱歇尔膜厚度的长期变化。
本研究纳入了 25 例连续患者。所有患者均行双侧颧骨种植体植入术。在颧骨种植体植入术前及至少 1 年后，使用 CBCT 测量 49 个上颌窦（1 个上颌窦因颧骨种植体早期丢失而未包括在内）的施莱歇尔膜厚度（SMT）。同时评估并记录每个窦口的通畅情况。
共在纳入患者中放置了 84 枚颧骨种植体和 30 枚常规种植体。1 例患者的 2 枚单侧上颌颧骨种植体在植入后 2 个月被取出。SMT 从植入后中位数随访时间 23.00 个月（四分位距：14 个月）时的 1.03mm（四分位距：1.57mm）增加至 1.33mm，差异具有统计学意义。颧骨种植体植入前，24.5%（12/49）的窦腔 SMT 大于 2mm，而植入后这一比例为 28.6%（14/49）。窦口通畅的窦腔比例也从 2.0%（1/49）增加至 12.2%（6/49）。
颧骨种植体植入可能导致慢性施莱歇尔膜增厚。建议颧骨种植体植入后进行强化术后护理及临床和影像学监测。
