Int J Periodontics Restorative Dent. 2022 Sep-Oct;42(5):683-689. doi: 10.11607/prd.5005.
The high biomechanical loads in molar region wounds challenge the indication for short implants to be used as a single-unit implant. This study reports on the outcomes of single-unit short implants (≤ 8.0 mm) in the maxillary and mandibular molar regions. Forty-nine short implants were placed in 48 patients to replace a missing molar tooth. Two-piece restorations with screw retention were fabricated. During the follow-up, implant survival and marginal bone loss (MBL) were assessed. The known implant length was used as a reference to calibrate the linear measurements on digital periapical radiographs, and descriptive statistical analysis was performed. The implants were followed over a period of 47 ± 12 months. No implant failure was recorded, and no prosthesis failure was observed. The average MBL was 0.15 ± 0.5 mm. The mean crown height space was 13 ± 3 mm. The overall crown-to-implant ratio was 1.7 ± 0.4. Two technical complications occurred due to the loosening of the unit abutment. After screw re-tightening, no more screw loosening was observed. This study supports the use of short implants as a single-unit implant in the maxillary and mandibular molar regions.
磨牙区的高生物力学负荷对短种植体作为单单位植入物的适应证提出了挑战。本研究报告了上颌和下颌磨牙区单单位短种植体（≤8.0mm）的治疗结果。48 名患者共植入 49 颗短种植体以替代缺失的磨牙。采用螺丝固位的两部分修复体。在随访过程中，评估了种植体的存活率和边缘骨吸收（MBL）。使用已知的种植体长作为参考来校准数字化根尖片上的线性测量值，并进行描述性统计分析。这些种植体的随访时间为 47±12 个月。未记录到种植体失败，也未观察到修复体失败。平均 MBL 为 0.15±0.5mm。平均冠高空间为 13±3mm。总体冠-种植体比为 1.7±0.4。由于单位基台松动，发生了 2 起技术并发症。螺丝重新拧紧后，未再观察到螺丝松动。本研究支持在上颌和下颌磨牙区将短种植体作为单单位植入物使用。
