Kratunova Evelina, O'Connell Anne C
Division of Public and Child Dental Health, Dublin Dental University Hospital, Trinity College, Dublin, Ireland.
Pediatr Dent. 2014 Nov-Dec;36(7):494-8.
This study aimed to compare the clinical and radiographic success of preveneered posterior NuSmile® and Kinder Krowns® over one year and to assess the level of parental satisfaction with their esthetics.
Three trained operators placed 120 crowns in a split-mouth design with a random allocation for 36 participants (mean age: 5.8 years) who received two, four, six, or eight crowns. Blind assessment of the clinical and radiographic performance of the restorations was performed by four calibrated examiners after one year. Results were analyzed by Fisher's exact test and McNemar test. Examiner reliability was determined by Cohen's kappa score. Visual analogue scale (VAS) was used to assess the level of parental satisfaction.
All crowns but one were retained, and the majority (83 percent) had no facing fractures. Parental satisfaction was high (9.4/10 on the VAS). Primary maxillary first molar crowns had more occlusal facing fractures than their mandibular counterparts (P=.02). Primary mandibular second molar crowns showed more facing fractures than their maxillary counterparts (P=.008). Both types showed no statistical difference in most categories, but Kinder Krowns had more facing fractures (P<.02).
Posterior preveneered crowns have predictable durability at 12 months while offering natural appearance to restored teeth.
本研究旨在比较预先制备的后牙NuSmile®冠和Kinder Krowns®冠在一年时间内的临床和影像学成功率，并评估家长对其美观程度的满意度。
三名经过培训的操作人员采用分口设计为36名参与者（平均年龄：5.8岁）放置了120颗牙冠，这些参与者分别接受了2颗、4颗、6颗或8颗牙冠，牙冠随机分配。一年后，由四名经过校准的检查人员对修复体的临床和影像学表现进行盲法评估。结果采用Fisher精确检验和McNemar检验进行分析。检查者的可靠性通过Cohen卡方评分确定。采用视觉模拟量表（VAS）评估家长的满意度。
除一颗牙冠外，所有牙冠均得以保留，大多数（83%）没有饰面骨折。家长满意度较高（VAS评分为9.4/−10）。上颌第一乳磨牙冠的咬合面骨折比下颌第一乳磨牙冠更多（P = 0.02）。下颌第二乳磨牙冠的饰面骨折比上颌第二乳磨牙冠更多（P = 0.008）。两种类型在大多数类别中均无统计学差异，但Kinder Krowns冠的饰面骨折更多（P<0.02）。
预先制备的后牙冠在12个月时具有可预测的耐用性，同时能使修复后的牙齿呈现自然外观。
