Clinical study on root canal filling combined with crown restoration for the treatment of large area defect of deciduous teeth / 中国基层医药

ABSTRACT

Objective:To investigate the clinical efficacy of root canal filling combined with crown restoration in the treatment of large area defect of deciduous teeth.Methods:The clinical data of 160 children patients with large area defect of deciduous teeth who received treatment in Wenling No.4 People's Hospital from January 2017 to January 2018 were retrospectively analyzed. All included children received root canal filling treatment. According to the different postoperative repair methods, these children were divided into two groups. In the observation group ( n = 80), repair with a prefabricated metal crown was performed. In the control group ( n = 80), resin filling repair was given. Gingival health (gingival index) and restoration effect, including secondary caries, gingival condition (congestion or not) and food impaction were compared between the observation and control groups. Tooth condition (marginal tightness, adjacency) and safety (restoration and abrasion) were compared between the two groups after 1 year of follow up. Results:Before restoration, there was no significant difference in gingival index between the observation and control groups [(0.76 ± 0.41) vs. (0.73 ± 0.32), P > 0.05]. After restoration, gingival index in the observation group was significantly lower than that in the control group [(0.86 ± 0.55) vs. (1.35 ± 0.62), t = 5.288, P < 0.001]. In the observation group, no secondary caries or food impaction was observed, and there was one case of gingival bleeding. In the control group, there were eight cases of secondary caries, four cases of good impaction, and nine cases of gingival bleeding. The incidence of adverse reactions in the observation group was significantly lower than that in the control group ( χ2 = 6.826, P < 0.05). One-year follow-up results revealed that 79 cases (98.75%) were qualified in tooth bonding and 78 cases (97.50%) were qualified in tooth occlusion in the observation group, while 70 cases (87.50%) were qualified in tooth bonding and 69 cases (86.25%) were qualified in the occlusion in the control group. There were significant differences in qualified bonding and occlusion between the two groups ( χ2 = 7.907, 6.781, both P < 0.05). The success rate of marginal tightness, the success rate of adjacency, restoration and abrasion in the observation group were higher or superior to those in the control group (98.75% vs. 86.25%, 100.00% vs. 87.50%, 100.00% vs. 85.00%, 98.75% vs. 83.75%) ( χ2 = 9.009, 10.666, 12.973, 11.272, all P < 0.05). Conclusions:Root canal filling combined with crown restoration in the treatment of large area defect of deciduous teeth has a high success rate of qualified bonding and occlusion, less adverse defects, low incidence of food impaction and gingival bleeding, decreases the risk of secondary caries, protects the remaining tooth tissue, maintains normal chewing function, and is conducive to the eruption of permanent teeth.