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Title: Efficacy evaluation of zirconia crown on primary molars with caries defects.
Author: Deng S, Niu S, Gao Q, Zhang L, Chen Z, Liu M.
Journal: Hua Xi Kou Qiang Yi Xue Za Zhi; 2024 Oct 01; 42(5):652-659. PubMed ID: 39304509.
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. 目的: 探讨金属预成冠（PMC）与全瓷预成冠（ZC）在儿童乳磨牙龋损中的修复疗效以及对牙周健康的影响，分析其可能的影响因素。方法: 本研究采用队列研究方法，收集2021年10月—2021年12月于深圳市儿童医院口腔科就诊的3~8岁患儿，下颌第一乳磨牙因龋损行牙髓切断术后进行PMC、ZC修复，共192例，包括PMC组96例（96颗龋齿），ZC组96例（96颗龋齿），分别于治疗后3个月、1年和2年进行临床检查，观察PMC组和ZC组的临床修复效果以及牙周状况，记录修复体是否完整、牙龈指数（GI）、探诊出血指数（BI）、菌斑指数（PLI）和世界牙科联盟（FDI）修复体各项性能评价指标。结果: PMC组与ZC组在修复后3个月、1年、2年的牙周健康指标差异无统计学意义（P>0.05）；经修复3个月、1年、2年后，PMC组GI、BI、PLI高于ZC组，差异有统计学意义（P<0.05）；而FDI修复体各项性能评分差异无统计学意义（P>0.05）。不同性别患儿在2组修复后，GI、BI、PLI差异均无统计学意义（P>0.05）。不同性别患儿在PMC修复后的FDI修复体各项性能评分差异无统计学意义（P>0.05）；在ZC修复后的FDI修复体各项性能评分中，女童评分高于男童，差异有统计学意义（P<0.05）。Pearson相关分析显示，PMC组年龄与GI、BI、PLI、FDI修复体各项性能评分均呈负相关，存在显著相关性（P<0.01），ZC组年龄与GI、BI、PLI、FDI修复体各项性能评分均无显著相关性（P>0.05）。结论: PMC与ZC可为乳磨牙龋损患儿提供较理想的修复手段。两种预成冠修复后的牙周健康状况趋于稳定，乳牙ZC组牙周健康状况优于PMC。患儿的年龄越大，PMC组牙周状况越好。. OBJECTIVE: 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). CONCLUSION: 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.

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