Abbas Lamiaa Hussein, Wassel Mariem Osama, Hassan Islam Tarek, El-Dimeery Ayman Galal, Elghazawy Reham Khaled
The Department of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Ain Shams university, Organization of African Unity St. Abbasia - Cairo, Post No. 11566, Egypt.
Orthodontic Department, Faculty of Dentistry, Ain Shams University, Organization of African Unity St. Abbasia - Cairo, Post No. 11566, Egypt.
J Dent. 2025 Feb;153:105556. doi: 10.1016/j.jdent.2025.105556. Epub 2025 Jan 6.
This study aims to compare the clinical performance of 3D printed endocrowns (ECs) and prefabricated zirconia crowns (PZRCs) in restoring pulpotomized primary molars, over 3, 6, and 12 months.
Thirty pulpotomized mandibular primary molars in 16 children aged 4-8 years were randomized with a 1:1 allocation ratio into two groups: group (A), PZRCs, and group (B), 3D-printed ECs. All restorations were evaluated for esthetic, functional, and biological properties using FDI criteria at 3-, 6-, and 12-month intervals. Restorations requiring repair or replacement (a total restoration score of 4 or 5, respectively) were recorded as failures. For each outcome variable, the Mann-Whitney U test was used for intergroup comparisons, while Friedman's test was used for intragroup comparisons, followed by the Nemenyi post hoc test. The significance level was set at p ≤ 0.05.
No statistically significant difference in survival times between PZRCs and ECs was found (12 and 11.36 months, respectively). Both restoration types showed a clinical success rate of 64.3 %. No statistically significant difference was found between the esthetic success of PZRCs and ECs (92.9 % and 71.4 %, respectively), matching their functional success rates. Similarly, no statistically significant difference was observed in the biological success of ECs and PZRCs (78.6 % and 64.3 %, respectively).
3D-printed ECs can be a promising and convenient alternative to full-coverage restorations in pulpotomized primary molars for up to one year.
Restoration of pulpotomized primary molars using 3D-printed ECs offers a more conservative and esthetic option with minimal trauma to gingival tissues and reduced chair time, which is crucial for pediatric patients.
NCT04909827.
本研究旨在比较3D打印全冠（ECs）和预成氧化锆全冠（PZRCs）在修复活髓切断术治疗后的乳磨牙3个月、6个月和12个月时的临床性能。
将16名4 - 8岁儿童的30颗接受活髓切断术的下颌乳磨牙按1:1分配比例随机分为两组：A组为PZRCs，B组为3D打印ECs。在3个月、6个月和12个月时，使用FDI标准对所有修复体的美学、功能和生物学特性进行评估。需要修复或更换的修复体（修复体总评分为4或5）记录为失败。对于每个结果变量，组间比较采用Mann-Whitney U检验，组内比较采用Friedman检验，随后进行Nemenyi事后检验。显著性水平设定为p≤0.05。
PZRCs和ECs的存活时间无统计学显著差异（分别为12个月和11.36个月）。两种修复类型的临床成功率均为64.3%。PZRCs和ECs的美学成功率无统计学显著差异（分别为92.9%和71.4%），功能成功率与之匹配。同样，ECs和PZRCs的生物学成功率也无统计学显著差异（分别为78.6%和64.3%）。
在活髓切断术治疗后的乳磨牙中，3D打印ECs在长达一年的时间里可成为全冠修复的一种有前景且便捷的替代方案。
使用3D打印ECs修复活髓切断术治疗后的乳磨牙提供了一种更保守且美观的选择，对牙龈组织创伤最小且减少了椅旁时间，这对儿科患者至关重要。
NCT04909827。
