Zygomatic Unit, Hepler Bone Clinic, ZAGA Center Barcelona, Roman Macaya, 22-24, 08022, Barcelona, Spain.
International Teaching Scholar, Indiana University School of Dentistry, Indianapolis, USA.
Int J Implant Dent. 2024 Jun 10;10(1):30. doi: 10.1186/s40729-024-00548-9.
This non-interventional study investigates variations in the type and frequency of late complications linked to novel zygomatic implant designs, installed adhering to the Zygoma Anatomy-Guided Approach (ZAGA) concept, over an extended follow-up period of at least 3 years.
Consecutive patients presenting indications for treatment with ZIs were treated according to ZAGA recommendations. Implants were immediately loaded. The ORIS success criteria for prosthetic offset, stability, sinus changes and soft-tissue status were used to evaluate the outcome.
Twenty patients were treated. Ten patients received two ZIs and regular implants; one received three ZIs plus regular implants, and nine received four ZIs. Fifty-nine ZIs were placed: thirty-six (61%) Straumann ZAGA-Flat implants and twenty-three (39%) Straumann ZAGA-Round implants. Four patients (20%) presented earlier sinus floor discontinuities. Fifteen patients (75%) had prior sinus opacities. Nineteen patients were followed for between 38 and 53 months (mean 46.5 months). One patient dropped out after 20 months. When comparing pre-surgical CBCT with post-surgical CBCT, 84.7% of the sites presented identical or less sinus opacity; nine locations (15%) showed decreased, and another nine increased (15%) post-surgical sinus opacity. Fifty-three ZIs (89.8%) maintained stable soft tissue. Six ZIs had recessions with no signs of infection. ZIs and prosthesis survival rate was 100%.
The study highlights the effectiveness of ZAGA-based zygomatic implant rehabilitations using Round and Flat designs. Despite patient number constraints, minimal changes in the frequency of late complications from the 1-year follow-up were observed. 100% implant and prosthesis survival rate over a mean follow-up of 46.5 months is reported.
本非介入性研究调查了在至少 3 年的延长随访期内，采用 Zygoma Anatomy-Guided Approach（ZAGA）概念安装新型颧骨种植体设计的种植体，其与晚期并发症的类型和频率的变化。
根据 ZAGA 建议，对有 ZI 治疗适应证的连续患者进行治疗。种植体立即加载。使用 ORIS 修复体偏移、稳定性、窦变化和软组织状况的成功标准来评估结果。
共治疗 20 例患者。10 例患者接受了 2 个 ZI 和常规种植体治疗；1 例患者接受了 3 个 ZI 和常规种植体治疗，9 例患者接受了 4 个 ZI 治疗。共植入 59 个 ZI：36 个（61%）Straumann ZAGA-Flat 种植体和 23 个（39%）Straumann ZAGA-Round 种植体。4 例患者（20%）出现早期窦底不连续。15 例患者（75%）有既往窦腔混浊。19 例患者的随访时间为 38 至 53 个月（平均 46.5 个月）。1 例患者在 20 个月后脱落。将术前 CBCT 与术后 CBCT 进行比较，84.7%的部位呈现出相同或更少的窦腔混浊；9 个部位（15%）显示术后窦腔混浊减少，另外 9 个部位（15%）增加。53 个 ZI（89.8%）保持稳定的软组织。6 个 ZI 出现了无感染迹象的退缩。ZI 和修复体的存活率为 100%。
该研究强调了基于 ZAGA 的颧骨种植体修复使用圆形和平面设计的有效性。尽管受到患者数量的限制，但从 1 年随访观察到晚期并发症的频率几乎没有变化。在平均 46.5 个月的随访中，报告了 100%的种植体和修复体存活率。
