很少有zy骨植入物(ZI)设计可用。这项非干预性研究的目的是报告两种新的特定部位ZI的有效性。选择并按照zygoma解剖引导入路(ZAGA)放置。
根据ZAGA概念建议,连续出现使用ZI康复指征的患者进行治疗。按照制造商的说明立即装载植入物。关于假肢偏移的成功标准,犀牛窦状态,软组织状况,和植入物稳定性也被用作结果参数。
20例患者随访12~28个月,平均18.8个月。10人接受了2个ZI加常规前植入物;1人接受了3个ZI加常规植入物,9人接受了4个ZI。总的来说,放置了59个ZI,34(58%)StraumannZAGA扁平化设计,和25(42%)ZAGA-Round。49%的地点被归类为ZAGA-4型,27%被归类为ZAGA-2型。4例(20%)在手术前出现鼻窦-鼻底不连续性,15例(75%)出现先前的鼻窦混浊。所有植入物一根都达到了45N以上。厘米的插入扭矩。未观察到手术并发症。一年后,17例患者的改良Lund-Mackay评分为阴性.与手术后1年的CBCT相比,11例患者的17个部位的不透明性降低。所有的植入物和假体保持稳定和功能。
该研究总结出100%的植入物/假体存活率和低并发症水平。在样本和观察期的限制内,结果表明,即使在上颌骨极度吸收的情况下(根据本研究的情况),当按照ZAGA方案恢复萎缩性上颌骨时,ZAGA-Flat和ZAGA-RoundZI是可行的治疗选择。
There are few zygomatic implants (ZI) designs available. The objective of this non-interventional study was to report the effectiveness of two new site-specific ZI, selected and placed following the zygoma anatomy-guided approach (
ZAGA).
Consecutive patients presenting indications for rehabilitation using ZI were treated according to
ZAGA Concept recommendations. Implants were immediately loaded following the manufacturer\'s instructions. Success criteria regarding prosthetic offset, rhino-sinus status, soft tissue condition, and implant stability were additionally used as outcome parameters.
Twenty patients were followed for a period of 12 to 28 months (average 18.8 months). Ten received 2 ZI plus regular anterior implants; One received 3 ZI plus regular implants and nine received 4 ZI. In total, 59 ZI were placed, 34 (58%) Straumann
ZAGA-Flat design, and 25 (42%)
ZAGA-Round. Forty-nine percent of the sites were classified as
ZAGA-4 type and 27% as
ZAGA-2. Four patients (20%) presented discontinuities of the sinus-nose floor before surgery and 15 patients (75%) presented previous sinus opacities. All implants bar one reached more than 45 N.cm of insertion torque. No surgical complications were observed. After 1 year, the modified Lund-Mackay score was negative in 17 patients. Seventeen sites in 11 patients exhibited decreased opacity when pre-surgical imaging was compared to 1-year post-surgical CBCT. All implants and prostheses remained stable and in function.
The study concluded 100% implant/prosthesis survival rates and low complication levels. Within the limitations of the sample and observation period, results suggest that even in cases of extremely resorbed maxillae (as per cases in this study), ZAGA-Flat and
ZAGA-Round ZI are viable treatment options when restoring atrophic maxillae following the
ZAGA protocol.