һ�廯�����׮���޸������ʼ��첻����ǰ������ȱ���ٴ�Ч������

目的评价一体化氧化锆桩核修复牙本质肩领不完整前牙牙体缺损的临床效果。方法选择2010年1月至2011年12月在广东省中山市人民医院口腔医疗中心修复科就诊的上前牙牙体大面积缺损牙本质肩领不完整患者40例（40颗患牙）。经完善根管治疗后随机分为A、B两组，每组20例（20颗患牙）。A组采用一体化氧化锆桩核＋氧化锆全瓷冠进行修复，B组采用铸造钴铬桩核＋钴铬烤瓷全冠进行修复。经过2年的临床追踪随访，观察其临床效果。结果随访期内，40例患者均能如期复诊。A组所有患者对修复美观效果均示满意；有1例右上中切牙在18个月时出现根折，其余病例均无桩核松动、脱落、折断，无根折，无明显牙龈炎，x线片未见继发性根尖周炎。B组中有9例患者对修复美观效果表示满意，11例患者认为美观效果一般；有2例分别是右上侧切牙在6个月及左上中切牙在15个月时发生根折，1例左上中切牙在24个月时因桩核松动而脱落，3例患牙在12个月和18个月时出现牙龈炎。结论一体化氧化锆桩核修复牙本质肩领不完整前牙牙体缺损时可获得满意的美观效果及生物相容性，近期临床效果满意。

Clinical evaluation of the restoration of anterior defected teeth with incomplete ferrule using copy-milled zirconia posts and cores.

Objective To evaluate the clinical effect of copy-milled zirconia posts and cores in the restoration of anterior defected teeth with incomplete ferrule. Methods Forty teeth which undertook complete root canal treatment were randomly divided into copy-milled zirconia posts and cores＋zireonia crown restoration （Group A） and casting Co--Cr posts and cores＋Co-Cr PFM restoration（Group B）.All the restorations were followed up for 2 years. Results All the patients were satisfied with the restoretions except 11 restorations in group B.One case in group A and two cases in group B failed in term of roots fracture.One prosthese loosened and fell off in group B.Three cases showed gingival inflammation in group B. No loosening or falling off or root fracture, and no gingival inflammation or periapical pathology in other cases of group A and B. Conclusion Copy-milled zirconia posts and cores in the restoration for anterior defected teeth with incomplete ferrule shows satisfactory esthetic and bioeompatibility, resulting in good clinical effects within short period.