"Centre of Implantology and Dental Aesthetics", Région Stéphanoise, France.
Department of Neurosciences, Reproductive Sciences and Dental Sciences, University Federico II of Naples, Italy.
Biomed Res Int. 2018 Jul 24;2018:2908484. doi: 10.1155/2018/2908484. eCollection 2018.
Novel one-piece implants with concave smooth neck have been introduced to promote the formation of a thick mucosal layer and preserve marginal bone. A retrospective study on 70 patients with 1- to 6-year follow-up was carried out. Cumulative survival rates were assessed. Variations of marginal bone level were measured on periapical radiographs as distance of the implant-abutment junction from the bone crest. Influence of different variables on treatment outcome was evaluated. Cumulative success rate after 6 years was 99.4 % at implant level and 98.6 % at patient level. Marginal bone level changed in a significant way over time. After 4 months, an increase of radiographic bone level of 0.173 ± 1.088 mm at implant level and 0.18 ± 1.019 mm at patient level was recorded. Mean marginal bone loss after 5 years was 0.573 ± 0.966 mm at implant level and 0.783 ± 1.213 mm at patient level. Age, sex, smoking habits, implant sites, implant lengths and diameters, prosthetic retentions, and timing of loading did not influence marginal bone remodeling in a statistically significant way. At 4-year follow-up partial restorations lost a mean of 0.96 mm of more marginal bone compared with single restorations. This difference was statistically significant.
新型一体式种植体具有凹面光滑颈部，有助于形成较厚的黏膜层并保留边缘骨。对 70 例患者进行了为期 1 至 6 年的回顾性研究。评估了累积存活率。通过根尖片测量边缘骨水平的变化，即种植体-基台连接与骨嵴之间的距离。评估了不同变量对治疗结果的影响。6 年后种植体水平的累积成功率为 99.4%，患者水平的累积成功率为 98.6%。边缘骨水平随时间呈显著变化。4 个月后，种植体水平的影像学骨水平增加了 0.173 ± 1.088 mm，患者水平增加了 0.18 ± 1.019 mm。种植体水平的平均边缘骨丢失为 0.573 ± 0.966 mm，患者水平为 0.783 ± 1.213 mm。年龄、性别、吸烟习惯、种植部位、种植体长度和直径、修复体保留方式以及加载时机在统计学上均未对边缘骨重塑产生显著影响。在 4 年随访中，与单个修复体相比，部分修复体失去了平均 0.96mm 更多的边缘骨，这一差异具有统计学意义。
