Comparison of First Mandibular Primary Molar Crown Dimensions with Stainless Steel Crowns in a Sample of Iranian Children

  • Mehdi Shahrabi Associate Professor, Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  • Alireza Heidari Associate Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  • Sanaz Kamareh Postgarduate student of pediatric dentistry, Department of pediatric dentistry , School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran , Iran
Keywords: Dimension, First Mandibular primary Molar, Stainless Steel Crown


Background and aims: Deciduous teeth have the main role in an important part of child development. Attempts to maintain these primary teeth have been lead to introduce many materials and techniques such as stainless steel crowns. Due to variation in tooth anatomy between populations, this study compared the buccolingual (BL) to mesiodistal (MD) ratio in first mandibular primary molars with those of stainless steel crowns (SSCs) in a sample of Iranian population.

Materials and methods: 96 extracted first mandibular primary molarswith no caries, restoration, hypoplasia or other dental anomalies in CEJ region, were selected. The MD and BL dimensions of teeth and available maxillary and mandibular SSCs (3M brand) were measured. All dimensions were measured twice, with digital caliper (Insize, Germany); by two people at two different times . Data were analyzed by one-sample t-test and Mc-Nemar's test using SPSS 21.0 software.

Results: significant differences were seen in both BL and MD dimensions between teeth and both maxillary and mandibular SSCs. (p<0.001) According to McNemar's test, 65.6% of teeth were consistent with mandibular SSCs and 38.5% were consistent with maxillary crowns. 3.1% of teeth did not match any of the crowns and in 7.4% both maxillary and mandibular SSCs are appropriate.

Conclusion: In a comparison of the variances of BL/MD ratio of teeth with SSCs two-thirds of teeth were similar to the mandibular SSCs and in about one-third of cases, maxillary SSCs are appropriate. so, significant difference was seen between teeth size and both maxillary and mandibular crowns.


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How to Cite
Shahrabi M, Heidari A, Kamareh S. Comparison of First Mandibular Primary Molar Crown Dimensions with Stainless Steel Crowns in a Sample of Iranian Children. Front Dent. :Uncorrected Proof.
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