Changes in occlusal bite force following placement of preformed metal crowns on primary molars in 4–6 years old children: a 6 months’ follow-up pilot study
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To evaluate the occlusal bite force (OBF) changes 6 months after placement of preformed metal crowns PMCs on primary molars in children.
Twenty-two subjects (aged 5.08 ± 0.92 years) participated and completed OBF records. Each patient received eight PMCs on their primary molars. OBF was recorded using a battery-operated portable type of OBF gauge at different time intervals: before placement, 1 week-, 1 month-, 2 months-, 3 months-, and 6 months after PMCs placement (T0–T5). A second group consisted of 22 caries-free children matched for age and gender were selected as a control sample and received no dental treatment. OBF was recorded in these subjects at T0 and T5 (6 months after).
OBF was reduced the first week after placement of PMCs. However, the OBF was restored and reached its original value at T4. At the 6-month recall visit (T5), maximum occlusal bite force (MOBF) was 148% and 136% of pre-treatment value on right and left sides, respectively. The mean MOBF difference between T5 and T0 was statistically significant (70.83N and 54.67N on the right and left sides respectively, p < 0.000).
OBF decreased 1 week after placement of PMC restoration and started to increase after 1 month reaching 136–140% of its original value after 6 months.
KeywordsPreformed metal crowns Primary molar teeth Children Occlusal bite force
This research was conducted to fulfill the master degree requirements according to the master degree regulation set by JUST University of Science and Technology. This study was supported by Deanship of Research at the Jordan University of Science and Technology (Grant Number 251/2011). We would like to express our gratitude to Dr. Haitham Owais for his help during the conduct of this study.
Compliance with ethical standards
Conflict of interest
We have no conflict of interest to declare.
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