Correlation between occurrence of proximal caries and non-proximal caries in primary molars
Objective To analyze the correlation between non-proximal caries(NP)and proximal caries(P)in children.Methods A total of 210 preschool children who first visited Hefei Stomatological Hospital from May 2021 to June 2023 were selected for visual examination and imaging of the intraproammary molar teeth,the incidence of non-proximal caries and proximal caries was assessed,and the correlation be-tween the occurrence the two was examined using the Kendall's tau-b coefficient.Results A total of 1 680 primary molars were examined.The incidence of proximal caries was 44.35%by visual examination and 75.18%by X-ray examination,and the difference was statistically sig-nificant(χ2=462.623,P<0.05).Kendall's tau-b coefficients for the detection rate of proximal and non-proximal caries was 0.755 and 0.679 in visual examination and X-ray examination respectively.The Chi-square test showed that there was a statistically significant difference in the detection rate of caries in the proximal surface between the presence or absence of non-proximal caries by visual examination(χ2=224.354,P<0.05).There was a statistically significant difference in the detection rate of caries in the proximal surface between the presence or absence of non-proximal caries by X-ray examination(χ2=290.223,P<0.05).Conclusion The proximal caries are easy to be neglected in visual exami-nation,but X-ray examination can improve the detection rate of proximal caries.The occurrence of proximal caries is correlated with the pres-ence of non-proximal caries and the degree of decay of non-proximal caries.
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