Gao EnFeng, Hei Wei-Hong, Park Jong-Chul, Pang KangMi, Kim Sun Kyung, Kim Bongju, Kim Soung-Min, Lee Jong-Ho
Department of Stomatology, China-Japan Friendship Hospital, Beijing, China.
Key Laboratory for Oral Biomedical Engineering of Ministry of Education, Wuhan University School and Hospital of Stomatology, Wuhan, China.
J Periodontal Implant Sci. 2017 Oct;47(5):312-327. doi: 10.5051/jpis.2017.47.5.312. Epub 2017 Oct 30.
This study assessed marginal bone remodeling and soft tissue esthetics after the loading of single bone-level implants in the anterior maxilla.
An open, single-arm observational clinical trial with 3 years of follow-up was performed, including 22 implants. The patients presented with a single tooth gap in the anterior maxilla (tooth positions 14-24), with natural or restored adjacent teeth. An implant was placed at least 8 weeks post-extraction and healed submerged for 6 weeks. After the second-stage operation, a fixed provisional prosthesis was provided. The final restoration was placed 6 months after the provisional restoration. The time of the provisional crown connection was considered to be the baseline in this study. Esthetic parameters and the marginal bone level were assessed at 6, 12, 24, and 36 months.
All implants were well integrated in the bone. A statistically significant increase was found in the mean implant stability quotient between the time of the provisional prosthesis and the time of the final prosthesis. Most implants (95.5%) revealed marginal bone resorption (<0.5 mm), and just 1 implant (4.5%) showed a change of 2.12 mm from baseline to 36 months (mean 0.07±0.48 mm), while the crestal bone level decreased significantly, from 2.34±0.93 mm at baseline to 1.70±1.10 mm at 36 months. The facial gingival margin and papilla were stable and the esthetic scores indicated high patient and dentist satisfaction.
Platform-switching bone-level implants placed in maxillary single-tooth gaps resulted in successful osseointegration with minimal marginal bone resorption. The peri-implant soft tissue was also esthetically satisfying and stable.
本研究评估了上颌前部单颗骨水平种植体加载后的边缘骨重塑和软组织美学效果。
进行了一项开放的单臂观察性临床试验，随访3年，包括22颗种植体。患者上颌前部存在单颗牙间隙（牙位14 - 24），相邻牙齿为天然牙或修复牙。拔牙后至少8周植入种植体，并潜行愈合6周。二期手术后，提供固定临时修复体。最终修复体在临时修复体6个月后放置。本研究中，临时冠连接时间被视为基线。在6、12、24和36个月时评估美学参数和边缘骨水平。
所有种植体均在骨内良好整合。在临时修复体到最终修复体期间，平均种植体稳定性商数有统计学显著增加。大多数种植体（95.5%）显示边缘骨吸收（<0.5 mm），只有1颗种植体（4.5%）从基线到36个月显示变化为2.12 mm（平均0.07±0.48 mm），而嵴顶骨水平显著下降，从基线时的2.34±0.93 mm降至36个月时的1.70±1.10 mm。面部牙龈边缘和龈乳头稳定，美学评分表明患者和牙医满意度高。
在上颌单颗牙间隙植入平台转换型骨水平种植体可实现成功的骨整合，边缘骨吸收最小。种植体周围软组织在美学上也令人满意且稳定。
