| Summary: | Introduction: This study aims to evaluate the oral hygiene and microbial adhesion on the 3M stainless steel crown (SSC) and Kids crown in primary molars. Materials and Methods: Seven children aged 4-8 years were selected from the Department of Pediatric and Preventive Dentistry. Children included in the study had lower right or left both first and second primary molars that required SSC. The tooth was restored with 3M crown and Kids crown. The swabs were collected before and immediately after the cementation of crowns and after 1 week. Oral hygiene index (OHI) was also evaluated. The swabs were incubated in mitis salivarius bacitracin agar, and the total number of Streptococcus mutans was counted and expressed in colony forming units. Results: There was no statistically significant difference seen in the microbial count and OHI-simplified between the 3M and Kids crown and natural teeth. Conclusion: The microbial adhesion of plaque and S. mutans was seen higher on the Kids crown. However, there was no significant difference between 3M ESPE and Kids crown.
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