Department of Oral and Maxillofacial Surgery, Västervik Hospital, Västervik, Sweden.
Department of Oral and Maxillofacial Surgery, Linköping University Hospital, Linköping, Sweden.
Clin Implant Dent Relat Res. 2017 Dec;19(6):1023-1033. doi: 10.1111/cid.12530. Epub 2017 Aug 29.
Insertion of an implant in the edentulous posterior maxilla is a challenging procedure because of poor bone quality and increased pneumatization of the maxillary sinus after tooth extraction. To increase the amount of bone, several surgical bone grafting techniques have been used-with considerable morbidity for patients. Osteotome sinus floor elevation (OSFE) is a less invasive technique. The clinical and radiographic outcome of 53 implants placed with this technique without bone graft has been reported previously.
Here we report the clinical and radiographic findings after 10 years of implant load bearing.
In a retrospective study, 34 Astra implants in 25 patients were subjected to 10-year follow-up radiologically and clinically. Each patient received 1 or 2 conical Astra implants. The level of the marginal bone and the height of the residual peri-implant alveolar bone (RPAB) for each implant were measured from digital intra-oral radiographs.
Two implants in edentulous patients were lost at the 1-year follow-up, and 1 more at the 3-year examination. There was no loss between 3-year and 10-year follow-up. At 10-year follow-up 36 implants were included. Implants used in single-tooth replacements and in partially edentulous cases had a 100% survival rate. The mean marginal bone loss was 0.6 ± 0.8 mm. The bone height at the time of implant insertion ranged from 1.8 to 6.9 mm, with a mean value of 4.3 ± 1.0 mm. At 10-year follow-up the mean gain in bone at the implant sites for all implants was 2.6 ± 1.2 mm.
The OSFE technique is a reliable method for rehabilitation of patients with atrophied posterior maxilla. However, the success of this method is associated with the amount of the residual bone. In the present study, this surgical approach without bone graft showed reliable long-term results with Astra implants.
由于拔牙后上颌窦骨质质量差和气化增加，在后牙缺失的上颌牙槽嵴植入种植体是一项具有挑战性的手术。为了增加骨量，已经使用了几种外科植骨技术，但这些技术对患者有较大的发病率。使用骨凿上颌窦底提升（OSFE）技术是一种侵袭性较小的技术。此前已经报道了使用该技术不进行骨移植而植入 53 个种植体的临床和影像学结果。
在此，我们报告使用该技术植入种植体 10 年后的临床和影像学结果。
在一项回顾性研究中，对 25 名患者的 34 颗 Astra 种植体进行了 10 年的影像学和临床随访。每位患者接受了 1 或 2 个锥形 Astra 种植体。从数字化口腔内放射影像中测量每个种植体的边缘骨水平和剩余种植体周围牙槽骨（RPAB）的高度。
在 1 年的随访中，2 颗无牙患者的种植体丢失，3 年的检查中又有 1 颗种植体丢失。在 3 年和 10 年的随访中没有种植体丢失。在 10 年的随访中，有 36 颗种植体被纳入研究。用于单牙修复和部分缺牙病例的种植体的存活率为 100%。平均边缘骨吸收为 0.6±0.8mm。种植体植入时的骨高度范围为 1.8 至 6.9mm，平均为 4.3±1.0mm。在 10 年的随访中，所有种植体的种植部位的平均骨量增加为 2.6±1.2mm。
OSFE 技术是一种用于修复萎缩性上颌后牙区的可靠方法。然而，这种方法的成功与剩余骨量有关。在本研究中，这种不进行骨移植的手术方法使用 Astra 种植体显示出可靠的长期结果。
