van Doorn B C, Hesse D, da Costa I O, Bonifacio C C
Department of Paediatric Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands.
School of Dentistry, RCSI University of Medical and Health Sciences, Dublin, Ireland.
Eur Arch Paediatr Dent. 2025 Feb;26(1):31-39. doi: 10.1007/s40368-024-00978-4. Epub 2024 Dec 16.
The aim of the present study was to evaluate the factors associated with failure requiring extraction after placement of preformed metal crowns (PMCs) in primary molars. Radiographic caries depth at baseline (initial/moderate and severe) and placement technique (Conventional and Hall technique) and other patient-related variables were analysed.
Clinical and radiographic records from children aged 2-10 years who had at least one primary molar treated with PMCs between 2011 and 2019 were evaluated. Chi-square test, Fisher exact tests and logistic regression analysis (α = 5%) were performed to verify the relationship between the primary outcome and categorical variables (caries depth, restorative teachnique, jaw, tooth type and gender).
A total of 244 teeth treated in 165 children were included in the analysis. A total of 18 failures were observed (7.4%), of which 17 were in deep caries lesions and in which 15 had the PMC placed according to the conventional technique. Both caries lesion depth and restorative technique were associated with treatment failure (p < 0.05).
Taking into account the limitations of this retrospective study, treatment failures requiring extraction occurred more often in deep caries lesions when treated with preformed metal crowns (PMCs) following the conventional technique when compared to the Hall Technique.
本研究旨在评估在乳牙上放置预成金属冠（PMC）后需要拔牙的失败相关因素。分析了基线时的放射学龋深度（初始/中度和重度）、放置技术（传统技术和霍尔技术）以及其他与患者相关的变量。
对2011年至2019年间至少有一颗乳牙接受PMC治疗的2至10岁儿童的临床和放射学记录进行评估。进行卡方检验、费舍尔精确检验和逻辑回归分析（α = 5%），以验证主要结局与分类变量（龋深度、修复技术、颌骨、牙型和性别）之间的关系。
分析纳入了165名儿童治疗的244颗牙齿。共观察到18例失败（7.4%），其中17例为深龋病变，15例采用传统技术放置PMC。龋病变深度和修复技术均与治疗失败相关（p < 0.05）。
考虑到本回顾性研究的局限性，与霍尔技术相比，采用传统技术用预成金属冠（PMC）治疗深龋病变时，需要拔牙的治疗失败更为常见。
