Cehreli Zafer C, Cetinguc Aysegul, Cengiz Sevi Burcak, Altay A Nil
Department of Pediatric Dentistry, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Am J Dent. 2006 Oct;19(5):262-6.
To evaluate the clinical and radiographic success rates of pulpotomized (formocresol) primary molar teeth restored with a resin-based composite (TPH) or a polyacid-modified resin composite (Dyract AP) over a 2-year period.
100 composite and 100 compomer restorations were placed over pulpotomized teeth by two clinicians in 84 patients. Two other calibrated clinicians evaluated the restorations using the modified USPHS/Ryge criteria observing the following characteristics: marginal discoloration, marginal adaptation, wear/anatomic form, enamel loss and caries. Mann Whitney U test, Friedman test and Wilcoxon signed ranks tests were used for statistical analysis (P= 0.05).
At 24 months, 80 composite and 72 compomer restorations were available for evaluations. Except for baseline, compomer restorations showed significantly more marginal discoloration (P= 0.001) and marginal disintegrity (P= 0.001) than did the resin composite. Compomer restorations demonstrated a significant increase in minor enamel cracks along restoration margins over time (P= 0.001), but no chipping or loss of enamel was detected. Caries was observed only in 2.8% of compomer restorations and was restricted to restoration margins. 2% of composite and 17% of compomer restoration-treated teeth were extracted due to radiographic evidence of failure. Pathological root resorption patterns observed beneath failed compomer restorations were strongly suggestive of coronal microleakage.
评估在两年时间内，用树脂基复合材料（TPH）或聚酸改性树脂复合材料（Dyract AP）修复经甲醛甲酚牙髓切断术治疗的乳磨牙的临床和影像学成功率。
两名临床医生为84例患者的牙髓切断术后牙齿放置了100个复合树脂修复体和100个复合体修复体。另外两名经过校准的临床医生使用改良的美国公共卫生服务部/赖格（USPHS/Ryge）标准对修复体进行评估，观察以下特征：边缘变色、边缘适应性、磨损/解剖形态、牙釉质丧失和龋齿。采用曼-惠特尼U检验、弗里德曼检验和威尔科克森符号秩检验进行统计分析（P = 0.05）。
在24个月时，有80个复合树脂修复体和72个复合体修复体可供评估。除基线外，复合体修复体的边缘变色（P = 0.001）和边缘完整性破坏（P = 0.001）明显多于树脂复合材料修复体。随着时间的推移，复合体修复体沿修复边缘的轻微牙釉质裂纹显著增加（P = 0.001），但未检测到牙釉质崩裂或丧失。仅在2.8%的复合体修复体中观察到龋齿，且仅限于修复边缘。由于影像学显示修复失败，2%的复合树脂修复体治疗牙齿和17%的复合体修复体治疗牙齿被拔除。在失败的复合体修复体下方观察到的病理性牙根吸收模式强烈提示存在冠部微渗漏。
