Efficacy evaluation of zirconia crown on primary molars with caries defects.

Shuman Deng, Shanshan Niu, Qi Gao, Li Zhang, Zhixiao Chen, Meng Liu
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Abstract

Objectives: This study aimed to estimate the therapeutic effects of preformed metal crown (PMC) and prefabricated zirconia crowns (ZC) on decayed primary morals in children, as well as to analyze the possible influencing factors.

Methods: A retrospective cohort study was performed on the data of 192 patients (aged 3 to 8) in the Stomatological Department of Shenzhen Children's Hospital from October 2021 to December 2021. The decayed mandibular first molars were selected and restored by vital-pulp therapy followed by PMC and ZC, including 96 cases (96 caries) in the PMC group and 96 cases (96 caries) in the ZC group. Oral clinical examination was performed at 3 months, 1 year, and 2 years after treatment, overwiewing the clinical therapeutic effects and periodontal status of PMC and ZC groups, as well as recording the crown integrity, gingival index (GI), probing bleeding index (BI), plaque index (PLI) and various prosthetic indices.

Results: No significance differences existed in the periodontal status of PMC and ZC groups at 3 months, 1 year, and 2 years after treatment (P>0.05). However, the GI, BI, and PLI in the PMC group were higher than those in the ZC group at 3 months, 1 year, and 2 years after treatment, and the difference was dramatically significant (P<0.05). No significances difference existed in various prosthetic indices (P>0.05), as well as in the GI, BI, and PLI, between the two groups (P>0.05). No significant differences existed in various prosthetic indices between genders after PMC restoration (P>0.05). The scores of girls in various prosthetic indices after ZC restoration were higher than those of boys (P<0.05). Pearson correlation analysis indicated an inverse correlation between age in the PMC group and the GI, BI, PLI, and FDI indices (P<0.01), rather than in the ZC group (P>0.05).

Conclusions: PMC and ZC can be applied to restore deciduous molar caries. The periodontal status of deciduous teeth in ZC group was superior to that in the PMC group. The periodontal status of deciduous teeth in PMC group may be stable with increased age.

氧化锆牙冠对有龋齿缺陷的小磨牙的功效评估。
研究目的本研究旨在估算预成金属冠(PMC)和预制氧化锆冠(ZC)对儿童龋坏基牙的治疗效果,并分析可能的影响因素:方法:对深圳市儿童医院口腔科2021年10月至2021年12月收治的192例患者(3至8岁)的资料进行回顾性队列研究。研究选择了下颌第一磨牙龋坏的患者,并对其进行了活髓治疗后的PMC和ZC修复,其中PMC组96例(龋坏96例),ZC组96例(龋坏96例)。分别于治疗后3个月、1年和2年进行口腔临床检查,观察PMC组和ZC组的临床治疗效果和牙周状况,并记录牙冠完整性、牙龈指数(GI)、探诊出血指数(BI)、菌斑指数(PLI)和各种修复体指数:结果:PMC组和ZC组在治疗后3个月、1年和2年的牙周状况没有显著差异(P>0.05)。但在治疗后 3 个月、1 年和 2 年,PMC 组的 GI、BI 和 PLI 均高于 ZC 组,且两组间的 GI、BI 和 PLI 差异显著(PP>0.05)。PMC修复后,两性在各种修复指数上无明显差异(P>0.05)。ZC修复后,女孩的各项修复指数得分均高于男孩(PPP>0.05):结论:PMC和ZC可用于修复臼齿龋。结论:PMC 和 ZC 可用于修复乳磨牙龋齿,ZC 组的乳牙牙周状况优于 PMC 组。随着年龄的增长,PMC 组乳牙的牙周状况可能会趋于稳定。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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