Primosch Robert E, Ahmadi Anissa, Setzer Barry, Guelmann Marcio
Department of Pediatric Dentistry, University of Florida College of Dentistry, Gainesville, Fla, USA.
Pediatr Dent. 2005 Nov-Dec;27(6):470-7.
The purpose of this retrospective study was to evaluate, via clinical and radiographic assessments, the treatment outcome of zinc oxide-eugenol (ZOE) pulpectomies performed in vital maxillary primary incisors successfully restored with composite resin crowns.
Pulpectomized vital primary incisors were treated by a uniformed technique, filled with ZOE paste, and successfully restored with composite resin crowns. Those that remained intact and noncarious for the assessment interval were evaluated for the outcome (success or failure) based on clinical and radiographic findings and compared to: (1) the reason for treatment; (2) the canal filling extent; (3) the type of composite resin crown restoration performed; and (4) the eruption status of its succedaneous tooth.
For 104 maxillary primary incisors meeting the inclusion criteria, failure, as judged by presence of pathologic root resorption and/or apical lucency, was determined to be 24% (25/104), for a mean duration of 18 months observation. Failures were statistically associated with the reason for treatment (higher for trauma), the extent of ZOE paste filler in the pulp canal (higher for gross overfill), and the eruption status of the associated succedaneous permanent incisor (higher for delayed eruption).
This study determined a failure rate (24%) for pulpectomies-using ZOE paste and performed on vital primary incisors-comparable to that reported for nonvital pulpectomies. A statistically significant increase in failure rates was found for: (1) incisors treated for trauma (42%) vs those treated for dental caries (19%); and (2) grossly overfilled canals (80%) vs canals filled to the apex (0%).
本回顾性研究的目的是通过临床和影像学评估，评价在活髓上颌乳切牙中采用氧化锌丁香油酚（ZOE）进行牙髓切断术并成功用复合树脂冠修复后的治疗效果。
对行牙髓切断术的活髓乳切牙采用统一技术进行治疗，用ZOE糊剂充填，并成功用复合树脂冠修复。在评估期内保持完整且无龋的牙齿，根据临床和影像学检查结果评估治疗效果（成功或失败），并与以下因素进行比较：（1）治疗原因；（2）根管充填程度；（3）所进行的复合树脂冠修复类型；（4）其继承恒牙的萌出状态。
对于104颗符合纳入标准的上颌乳切牙，经平均18个月的观察，根据病理性牙根吸收和/或根尖透影的存在判断，失败率为24%（25/104）。失败与治疗原因（外伤导致的失败率更高）、牙髓根管内ZOE糊剂充填程度（大量超充导致的失败率更高）以及相关继承恒牙的萌出状态（萌出延迟导致的失败率更高）在统计学上相关。
本研究确定，在活髓乳切牙上使用ZOE糊剂进行牙髓切断术的失败率（24%）与非活髓牙髓切断术报道的失败率相当。发现失败率在统计学上有显著增加的情况为：（1）因外伤治疗的切牙（42%）与因龋齿治疗的切牙（19%）相比；（2）大量超充的根管（80%）与充填至根尖的根管（0%）相比。
