Farzad Payam, Andersson Lars, Gunnarsson Sten, Johansson Berndt
Department of Oral and Maxillofacial Surgery, Central Hospital, 721 89 Västerås, Sweden.
Int J Oral Maxillofac Implants. 2006 May-Jun;21(3):399-404.
The aim of the present study was to describe experiences of 11 consecutively treated patients who received zygomatic implants. Patient results were assessed through clinical and radiographic evaluations of tissue conditions, including resonance frequency analysis (RFA).
Eleven patients were treated with implant-retained fixed prostheses. A total of 64 implants were placed, 22 of which were placed in the zygoma. Fixed prostheses were removed to allow clinical and radiographic evaluations at a follow-up visit 18 to 46 months following implant placement. RFA was performed on all implants. A visual analog scale was used to assess patient satisfaction before and after treatment.
All patients received implant-supported prostheses. All zygomatic implants demonstrated clinical signs of osseointegration. One anterior implant was lost during follow-up. Mean ISQ values for the zygomatic and anterior implants were 65.9 (range, 42 to 100) and 61.5 (range, 48 to 71), respectively. Twenty-four implants showed moderate inflammation, with 3 exhibiting severe inflammation. Most anterior implants (75.6%) showed a marginal bone recession of 1 thread or less. Four zygomatic implants showed bone loss of 4 to 5 threads, and 5 zygomatic implants exhibited no marginal bone support. Patients described significant improvement in chewing ability and esthetics but did not describe changes in speech.
The use of zygomatic implants can help the clinician avoid the need for bone grafting and reduce morbidity. In addition, it can shorten the treatment time considerably.
This preliminary report demonstrates that zygomatic implants can provide posterior support to fixed prostheses in patients who lack bone volume to place conventional implants without encroaching upon the maxillary sinus.
本研究旨在描述11例连续接受颧骨种植体治疗患者的经历。通过对包括共振频率分析（RFA）在内的组织状况进行临床和影像学评估来评估患者的治疗结果。
11例患者接受了种植体支持的固定修复体治疗。共植入64枚种植体，其中22枚植入颧骨。在种植体植入后18至46个月的随访中，拆除固定修复体以进行临床和影像学评估。对所有种植体进行RFA。使用视觉模拟量表评估治疗前后患者的满意度。
所有患者均接受了种植体支持的修复体。所有颧骨种植体均表现出骨结合的临床体征。随访期间有1枚前牙种植体脱落。颧骨种植体和前牙种植体的平均种植体稳定性商数（ISQ）值分别为65.9（范围42至100）和61.5（范围48至71）。24枚种植体出现中度炎症，3枚表现为重度炎症。大多数前牙种植体（75.6%）显示边缘骨吸收1个螺纹或更少。4枚颧骨种植体显示骨吸收4至5个螺纹，5枚颧骨种植体没有边缘骨支持。患者表示咀嚼能力和美观度有显著改善，但未提及言语方面的变化。
使用颧骨种植体可帮助临床医生避免骨移植的需求并降低发病率。此外，它可大幅缩短治疗时间。
本初步报告表明，颧骨种植体可为骨量不足无法植入传统种植体且不侵犯上颌窦的患者的固定修复体提供后部支持。
