Clinical assessment of class II resin-based composites versus preformed metal crowns performed on primary molars in patients at high risk of caries
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To compare class II resin composite with preformed metal crowns (PMC) in the treatment of proximal dentinal caries in high caries-risk patients.
The charts (270) of paediatric patients with proximal caries of their primary molars were reviewed. Success or failure of a procedure was assessed using the dental notes. Survival analysis was used to calculate the mean survival time (MST) for both procedures. The influence of variables on the mean survival time was investigated.
A total of 593 class II resin composites and 243 PMCs were placed in patients ranging between 4–13 years of age. The failure percentage of class II resin composites was 22.6% with the majority having been due to recurrent caries, while the failure percentage of PMCs was 15.2% with the majority due to loss of the crown. There was no significant difference between the MST of class II resin composites and PMCs, 41.3 and 45.6 months respectively (p value = 0.06). In class II resin composites, mesial restorations were associated with lower MST compared to distal restorations (p-value < 0.001).
The MST of resin composites and PMCs were comparable when performed on high caries-risk patients.
KeywordsChildren Class II resin-based composites Preformed metal crowns Primary molars Caries-risk Survival time
Compliance with ethical standards
This study was not funded.
This article does not contain any studies with human participants or animals performed by any of the authors.
For this type of study formal consent is not required
Conflict of interest
Author Alyahya declares that she has no conflict of interest. Author Khanum declares that she has no conflict of interest. Author Qudeimat declares that he has no conflict of interest. AA conceived and designed the study, developed data extraction forms, validated forms, extracted data, and wrote the manuscript; AK identified subjects and records and entered data; MQ helped in designing the study, developing data extraction forms, forms validation, analysed data and reviewed and edited manuscript.
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