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A cross-sectional cohort study of gingival crevicular fluid biomarkers in normal-weight and obese subjects during orthodontic treatment with fixed appliances.
Angle Orthodontist 2019 March 29
OBJECTIVES:: To investigate the effects of obesity on biomarker levels within lower incisor gingival crevicular fluid (GCF) in subjects undergoing routine fixed appliance orthodontic treatment.
MATERIALS AND METHODS:: This was a cross-sectional clinical cohort study. GCF was collected from normal-weight and obese subjects at completion of alignment at least 1 month after placement of 0.019 × 0.025-inch stainless-steel archwires. The primary outcome was the difference in GCF biomarker levels between groups. Secondary outcomes included differences in clinical parameters of plaque and gingival indices, unstimulated whole-mouth saliva, and GCF flow rates.
RESULTS:: Thirty-eight subjects (18 male, 20 female) with a mean age of 25.6 (SD, 6.3) years and mean body mass index (BMI) of 22.6 (1.6) in normal-weight and 32.4 (2.2) kg/m2 in obese groups were investigated. Apart from BMI ( P < .0001), there were no statistically significant differences in essential demographics between groups. Significantly increased levels of the adipokine leptin ( P < .009) and the tissue-remodeling biomarker matrix metalloproteinase-9 (MMP9; P < .020) were identified in the obese cohort. For the remainder of the biomarkers, including the RANKL bone-remodeling marker and several inflammatory markers, there were no significant differences between groups. No correlation was observed between plaque index or gingival index for any GCF biomarker for either group ( P = .07-1.00).
CONCLUSIONS:: This study investigated the GCF biochemical profile of obese and normal-weight subjects undergoing fixed-appliance orthodontic treatment. Significantly increased levels of the adipokine leptin and the tissue-remodeling biomarker MMP9 were identified in the obese group. These data provide evidence of differences in GCF biochemistry between obese and normal-weight subjects undergoing fixed appliance orthodontic treatment.
MATERIALS AND METHODS:: This was a cross-sectional clinical cohort study. GCF was collected from normal-weight and obese subjects at completion of alignment at least 1 month after placement of 0.019 × 0.025-inch stainless-steel archwires. The primary outcome was the difference in GCF biomarker levels between groups. Secondary outcomes included differences in clinical parameters of plaque and gingival indices, unstimulated whole-mouth saliva, and GCF flow rates.
RESULTS:: Thirty-eight subjects (18 male, 20 female) with a mean age of 25.6 (SD, 6.3) years and mean body mass index (BMI) of 22.6 (1.6) in normal-weight and 32.4 (2.2) kg/m2 in obese groups were investigated. Apart from BMI ( P < .0001), there were no statistically significant differences in essential demographics between groups. Significantly increased levels of the adipokine leptin ( P < .009) and the tissue-remodeling biomarker matrix metalloproteinase-9 (MMP9; P < .020) were identified in the obese cohort. For the remainder of the biomarkers, including the RANKL bone-remodeling marker and several inflammatory markers, there were no significant differences between groups. No correlation was observed between plaque index or gingival index for any GCF biomarker for either group ( P = .07-1.00).
CONCLUSIONS:: This study investigated the GCF biochemical profile of obese and normal-weight subjects undergoing fixed-appliance orthodontic treatment. Significantly increased levels of the adipokine leptin and the tissue-remodeling biomarker MMP9 were identified in the obese group. These data provide evidence of differences in GCF biochemistry between obese and normal-weight subjects undergoing fixed appliance orthodontic treatment.
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