脱细胞真皮基质用于前牙即刻种植扩增角化龈的临床研究

目的研究脱细胞真皮基质用于前牙即刻种植扩增角化龈的临床效果。方法唇侧骨板垂直缺损不超过牙根长度1/3的单颗前牙即刻种植病例20例,拔除患牙即刻种植,利用异种脱细胞真皮基质双层封闭植牙创口,并与周围黏膜加压严密缝合,2～3周拆线,8～12周行冠修复。冠修复后3、6个月,从龈缘高点到膜龈联合线测量种植牙角化龈的宽度,和邻牙及术前角化龈的宽度进行比较,并对种植牙的龈乳头进行美学评价。结果 20颗种植牙的角化龈宽度与种植前相比无明显差异,与相邻牙也无明显差异,膜龈联合线自然;17例种植牙的龈乳头达到Jemt氏分类的2级、3级。种植前,20颗种植牙的角化龈宽度为（4.460±0.220）mm,冠修复后3个月为（4.451±0.245）mm,正常邻牙是（4.410±0.189）mm。冠修复后3个月,种植位点角化龈平均宽度与正常邻牙比较（t=1.283,P=0.215）、与术前比较（t=0.584,P=0.566）,差异均无统计学意义。冠修复后6个月,种植位点角化龈宽度为（4.448±0.223）mm,正常邻牙为（4.404±0.197）mm,种植位点角化龈宽度与正常邻牙比较（t=1.620,P=0.122）、与术前比较（t=1.144,P=0.267）,差异均无统计学意义。结论脱细胞真皮基质可用于前牙即刻种植的创口封闭,能作为屏障膜有效引导骨组织再生,并能很好地保持种植位点的角化龈宽度,龈乳头的美学效果好。

Clinical Observation of Peri-implants Keratinized Tissue Augmented in Anterior Teeth with Acellular Dermal Matrix Xerograft

Objective To evaluate the effectiveness of acellular dermal matrix（ADM） xerograft in increasing the width and esthetics of keratinized gingiva around anterior immediate dental implants.Methods Twenty patients received ADM xerograft with/without guided bone regeneration（GBR） after immediate implants in maxillary or mandibular anterior regions.The width of keratinized gingiva was recorded at 3 and 6 months after final porcelain crown restoration.The parameter was compared to the mean width of adjacent teeth,and the implant gingival papilla was evaluated with Jemt＇s classification.Results ADM xerografts provided satisfactory results.The width and esthetics of the gingival/papilla in immediate implants were no difference（P0.05） with them in the natural adjacent teeth,and the position before operation.Conclusion The width of keratinized tissues was augmentation by using the ADM xerograft.