Analysis of the clinical efficacy and comfort of YAG laser combined with penetrating resin assisted in-office bleaching in the treatment of dental fluorosis
Objective To evaluate yttrium-aluminum-garnet(YAG)laser combined with penetrating resin-assisted in-office bleaching for the treatment of dental fluorosis.Methods Ninety patients with dental fluorosis in the Stomatology Department of Shijiazhuang Second Hospital from 2020 to 2022 were enrolled.They were randomly assigned into group A and group B,with 45 cases per group.Patients in group A were treated with low-energy YAG laser and in-office bleaching,and those in group B were treated with low-energy YAG laser combined with penetrating resin-assisted in-office bleaching.Decolouration before and after treatment was compared with a VITA chromatograph,and the color gradient and shade of enamel surfaces were recorded by a spectrophotometer after whitening.Tooth color changes were recorded at each time point using a spectrophotometer and Vita guide.Tooth color reversion was assessed and recorded before and after the tooth whitening within the 2-year follow-up.The incidence of tooth sensitivity after treatment was calculated.Results The tooth color of patients in both groups became whiter after treatment,but the tooth color grade was significantly lower in group B than that of group A(P＜0.001).After one week of treatment,the total effective rate of bleaching in group A and B was comparable(75.56％vs 73.33％,P＞0.05).After 6 months of treatment,the total effective rate of bleaching in group A and B was comparable(75.56％vs 80.00％,P＞0.05).After 1 year of clinical observation,the total bleaching rate was significantly higher in group B than that of group A(100.00％vs 80.00％,P＜0.05).The total effective rate at 2 years was 100.00％in group B and 82.22％in group A.The rate of tooth sensitivity immediately after treatment was significantly lower in group B than that of group A(40.00％vs 93.33％,P＜0.05).No allergic reaction was observed in both groups within 24 hours of drug administration.Conclusion YAG laser combined with penetrating resin assisted in-office bleaching has better clinical frontal efficacy and comfort in moderate dental fluorosis.
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