Comparison between the average dimensions of some kinds of stainless steel crowns (SSCs) and the average dimensions of primary molar teeth.

Background: stainless-steel crowns (SSCs) are usually used for deciduous teeth with more than two destroyed surfaces. Selecting the suitable SSC, in terms of proximal fit and marginal fit, has usually been challenging for practitioners. The current study compares the deciduous molar dimensions in the SCCs with the dimensions of these teeth given in the textbook.Methods: The dimensions of 3M, Kids Crowns, and KTR SCCs were measured using a digital caliper. Utilizing SPSS 26 software, the data was examined and compared to the table of standard sizes of primary teeth using one-sample t-test, ANOVA, and Tukey s test. P-values less than 0.05 were considered significant.Results: The study showed no significant difference in upper first molar SSCs in the occlusal-cervical dimension in Kids Crowns (P = 0.14) and 3M (P = 0.078) and in the mesiodistal dimension in Kids KTR (P = 0.083) and Crowns (P = 0.22). There was no significant difference in lower first molar SSCs in the occlusal-cervical dimension in Kids Crowns (P = 0.14) and in the bucco-lingual dimension in 3M (P = 0.1) and KTR SSCs (P = 0.0). There was no significant difference in the upper second molar SSCs in the occlusal-cervical dimension of Kids Crowns (P = 0.28) and 3M (P = 0.32). There was no significant difference in lower second molar SSCs in the occlusal-cervical dimension in Kids Crowns (P = 0.27) and KTR (P = 0.07), in the mesiodistal dimension in Kids Crowns (P = 0.22), KTR (P = 0.22), 3M (P = 0.5) and in the bucco-lingual dimension of KTR (P = 0.26) and 3M (P = 0.78).Conclusion: SSCs and teeth had the highest conformity in the occlusal-cervical dimension and the lowest conformity in the mesiodistal and bucco-lingual dimensions. SSCs had the highest conformity with the lower molars.