De Rouck Tim, Collys Kristiaan, Wyn Iris, Cosyn Jan
Dental Medicine, Free University of Brussels (VUB), B-1090 Brussels, Belgium.
Clin Oral Implants Res. 2009 Jun;20(6):566-70. doi: 10.1111/j.1600-0501.2008.01674.x. Epub 2009 Mar 3.
The immediate single-tooth implant has become a viable treatment option. However, the impact of the restorative procedure on esthetics is currently unclear. The goal of this study was to compare the soft tissue outline at immediate implants following two restorative protocols: immediate connection of a temporary crown or submerged healing during which a removable partial denture is used.
A 1-year single-blind randomized clinical study was performed in 49 patients. Twenty-four patients were assigned to the immediate restoration group and 25 to the delayed restoration group. Clinical and radiographic evaluations of soft and hard tissues were carried out after 3, 6 and 12 months.
Implant survival, bone remodeling, probing depth and bleeding tendency were not influenced by the restorative protocol. Delayed restoration resulted in initial papilla loss taking up to 1 year to attain comparable height as for immediate restoration. Midfacial recession was systematically 2.5-3 times higher following delayed restoration pointing to a 0.75 mm additional loss in comparison with immediate restoration after 1 year.
If the primary implant stability permits it, immediate single-tooth implants should be instantly provisionalized in the interest of optimal midfacial esthetics.
即刻单颗牙种植已成为一种可行的治疗选择。然而,修复程序对美学的影响目前尚不清楚。本研究的目的是比较两种修复方案后即刻种植体处的软组织轮廓:即刻连接临时冠或使用可摘局部义齿进行潜入式愈合。
对49例患者进行了为期1年的单盲随机临床研究。24例患者被分配到即刻修复组,25例被分配到延迟修复组。在3、6和12个月后对软硬组织进行临床和影像学评估。
种植体存活率、骨重塑、探诊深度和出血倾向不受修复方案的影响。延迟修复导致初期龈乳头丧失,需要长达1年的时间才能达到与即刻修复相当的高度。延迟修复后,面部中部退缩系统性地高出2.5 - 3倍,表明与1年后的即刻修复相比,额外丧失0.75 mm。
如果种植体初期稳定性允许,为了实现最佳的面部中部美学效果,即刻单颗牙种植应立即进行临时修复。