Int J Periodontics Restorative Dent. 2021 Jan-Feb;41(1):51-59. doi: 10.11607/prd.4703.
The purpose of this prospective study was to evaluate the success rates and prosthetic complications of implants with a modified sandblasted and acid-etched (SLA) surface inserted for posterior single-implant crown restorations. Final crowns were placed 3 to 4 weeks after surgery, and patient follow-up spanned 10 years in a private practice setting. A total of 22 patients (8 women, 14 men) with 25 posterior implants placed (16 mandible, 9 maxilla) were selected, including only implants for posterior single-implant crowns with insertion torque values of ≥ 35 Ncm at placement. Twenty-one implants passed the reverse torque test at 3 to 4 weeks after implant placement, and final restorations were placed. Three patients (4 implants) had "spinners," and there was one patient dropout after completion of the final restoration. All patients were recalled for clinical exams, digital periapical radiographs, and clinical photos at short-term (≤ 5 years) and long-term (> 5 years) follow-up appointments. The Community Periodontal Index of Treatment Needs was also determined at the initial and follow-up visits. Crestal bone level was measured at crown placement (T1), short-term follow-up (T2; mean: 29.4 months), and long-term follow-up appointments (T3; mean: 114.4 months). Twenty patients (23 implants) returned for examination at T2, and 15 (18 implants) were available at T3. For the 17 implants available at all evaluations, statistically significant bone loss was found from T1 to T2 (0.23 ± 0.30 mm), and the mean crestal bone level appeared stable from T2 to T3. Based on clinical and radiographic findings, the success rate for the implants and restorations at T2 and T3 was graded as 100%. Therefore, it can be stated that an early loading protocol of 3 to 4 weeks using a modified SLA surface at premolar/molar single-tooth locations can result in favorable clinical and radiographic long-term results.
本前瞻性研究旨在评估改良喷砂酸蚀（SLA）表面种植体在后牙单冠修复中的成功率和修复体并发症。术后 3 至 4 周时最终冠修复体就位，患者在私人诊所接受 10 年的随访。共选择了 22 名患者（8 名女性，14 名男性）的 25 个后牙种植体（16 个下颌，9 个上颌），仅包括植入扭矩值≥35 Ncm 的后牙单冠种植体。在植入后 3 至 4 周时，21 个种植体通过了反向扭矩测试，最终修复体就位。3 名患者（4 个种植体）出现“旋转”现象，1 名患者在最终修复完成后失访。所有患者均在短期（≤5 年）和长期（>5 年）随访时进行临床检查、数字化根尖片和临床照片，并在短期（T1）、短期随访（T2；平均：29.4 个月）和长期随访（T3；平均：114.4 个月）时测量种植体颈缘骨吸收量。还在初始和随访时测量社区牙周治疗需要指数。在牙冠就位时（T1）、短期随访时（T2；平均：29.4 个月）和长期随访时（T3；平均：114.4 个月）测量种植体颈缘骨吸收量。20 名患者（23 个种植体）在 T2 时接受检查，15 名患者（18 个种植体）在 T3 时接受检查。在所有评估中，有 17 个种植体可用，从 T1 到 T2 时发现有统计学意义的骨吸收（0.23±0.30mm），从 T2 到 T3 时种植体颈缘骨水平似乎稳定。基于临床和影像学检查结果，T2 和 T3 时种植体和修复体的成功率评为 100%。因此，可以说在磨牙或前磨牙单牙位使用改良 SLA 表面的 3 至 4 周早期负荷方案可获得良好的临床和影像学长期结果。
