Department of Oral and Maxillofacial Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
Dental School, Department of Fixed and Removable Prosthodontics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
Clin Implant Dent Relat Res. 2017 Aug;19(4):717-724. doi: 10.1111/cid.12498. Epub 2017 May 23.
The design of the implant neck might be significant for preservation of marginal bone.
To compare the 5-year radiographic and clinical outcome of single anterior implants provided with a smooth neck, a rough neck or a scalloped rough neck.
93 Patients with a missing anterior tooth in the maxilla were included. At random, patients received an implant with a 1.5 mm smooth neck ("smooth group"), a rough neck with grooves ("rough group") or a scalloped rough neck with grooves ("scalloped group"). Implants were installed in healed sites. Follow-up visits were conducted after final crown delivery and 1 year and 5 years later.
Scalloped implants showed significantly more initial marginal bone resorption. The total amount of bone loss was 1.26 ± 0.90 mm in the smooth group, 1.20 ± 1.1 mm in the rough group and 2.28 ± 0.97 mm in the scalloped group (P < .05). Survival rates were 96.2% for the smooth and scalloped group and 100% for the rough group. Scalloped implants showed deeper pocket depths, more bleeding and more technical complications. There were no differences in esthetic outcome nor in patient satisfaction.
For anterior single tooth replacements, scalloped implants show less favorable radiographic and clinical outcome compared to regular implants with a smooth neck or rough neck.
种植体颈部的设计对于维持边缘骨高度可能具有重要意义。
比较 5 年影像学和临床结果，评估具有光滑颈部、粗糙颈部或锯齿形粗糙颈部的单前牙种植体。
共纳入 93 名上颌缺失单个前牙的患者。随机将患者植入具有 1.5mm 光滑颈部的种植体（“光滑组”）、具有凹槽的粗糙颈部种植体（“粗糙组”）或具有凹槽的锯齿形粗糙颈部种植体（“锯齿组”）。种植体均在愈合的部位植入。在最终牙冠修复后、1 年和 5 年后进行随访。
锯齿种植体显示出明显更多的初始边缘骨吸收。光滑组的总骨损失量为 1.26±0.90mm，粗糙组为 1.20±1.1mm，锯齿组为 2.28±0.97mm（P<0.05）。光滑组和锯齿组的存活率为 96.2%，粗糙组为 100%。锯齿种植体的探诊深度更深，出血更多，技术并发症更多。在美学效果和患者满意度方面没有差异。
对于前牙单牙缺失，与具有光滑颈部或粗糙颈部的常规种植体相比，锯齿种植体的影像学和临床结果较差。
