Fortin Yvan
Int J Oral Maxillofac Implants. 2017 May/Jun;32(3):633-641. doi: 10.11607/jomi.5230.
This study was designed to evaluate long-term performance of zygomatic implants using an alternative apical fixation point to establish the posterior restorative foundation for fixed full-arch restoration.
A retrospective study of all consecutively treated patients with advanced maxillary resorption who were treated with zygomatic implants to support fixed prostheses from August 14, 2001 through November 24, 2009 was conducted; the final follow-up was August 31, 2015. All zygomatic implants were placed using the malar prominence of the maxillary bone for apical fixation. Initial study casts were analyzed to compute the anterior/posterior implant distribution, distance between bilateral zygomatic implants, and variation from ideal zygomatic implant positioning relative to the soft tissue crest. Soft tissue, implant, and restorative complications also were recorded.
Fifty-eight consecutively treated patients with advanced maxillary resorption were included in the study- 18 men and 40 women, with a mean ± SD age of 65.3 ± 8.0 years and range of 49 to 85 years. Forty-nine patients received bilateral zygomatic implants placed apically into the malar process of the maxillary bone, and nine patients received similarly placed unilateral zygomatic implants with 107 zygomatic implants reported. All patients had supplemental anterior implants and were restored with a one-piece splint framework and fully implant-supported restoration. Follow-up of 5 to 13 years was conducted, with a mean follow-up time of 8.4 years per zygomatic implant. No losses of zygomatic implants occurred. No major surgical or restorative complications were observed.
Utilizing the malar prominence of the maxilla for apical fixation of zygomatic implants predictably allows prosthetic placement of the implant platform in a favorable first molar position, eliminating prosthetic compromise.
本研究旨在评估颧骨种植体的长期性能，该种植体使用替代根尖固定点来为全牙弓固定修复建立后部修复基础。
对2001年8月14日至2009年11月24日期间所有连续接受治疗的上颌骨重度吸收患者进行回顾性研究，这些患者接受颧骨种植体以支持固定修复体；最后随访时间为2015年8月31日。所有颧骨种植体均以上颌骨颧突作为根尖固定点植入。对初始研究模型进行分析，以计算种植体的前后分布、双侧颧骨种植体之间的距离以及相对于软组织嵴的理想颧骨种植体位置的偏差。还记录了软组织、种植体和修复并发症。
本研究纳入了58例连续接受治疗的上颌骨重度吸收患者，其中男性18例，女性40例，平均年龄±标准差为65.3±8.0岁，年龄范围为49至85岁。49例患者接受双侧颧骨种植体，种植体根尖植入上颌骨颧突，9例患者接受单侧颧骨种植体，共植入107枚颧骨种植体。所有患者均有辅助前牙种植体，并采用一体式夹板框架和完全种植体支持的修复体进行修复。随访时间为5至13年，每枚颧骨种植体的平均随访时间为8.4年。未发生颧骨种植体丢失。未观察到重大手术或修复并发症。
利用上颌骨颧突作为颧骨种植体的根尖固定点，可以可预测地将种植体平台放置在有利的第一磨牙位置，避免修复妥协。
