ORCID Profile
0000-0002-3447-3178
Current Organisations
University of Queensland
,
Prince of Songkla University
,
Faculty of Dentistry, Prince of Songkla University
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Publisher: Wiley
Date: 03-07-2022
DOI: 10.1111/JOOR.13351
Abstract: Anterior bite planes are bite-raising appliances used for deep bite correction. However, muscle responses to anterior bite planes of different harnesses may vary. To prospectively evaluate masticatory muscle activity, muscle balance and maximum bite force (MBF) responses to anterior bite planes fabricated from acrylic resin (ABP) or bi-laminate thermoplastic (TBP) over 6 months in children with a deep bite. Sixty-six children were randomly assigned to the ABP, TBP or untreated control groups. Masticatory muscle activity, activity index (AC) and percentage overlapping coefficient (POC) were assessed by surface electromyography MBF, using a custom-made bite force sensor. Data were collected before, immediately after appliance insertion and after 2 weeks and 1, 3 and 6 months of treatment. Within- and between-group differences were analysed using the one-way ANOVA/Kruskal-Wallis and Mann-Whitney U tests (α = .05) Friedman's tests were used to assess within-group differences over time (α = .08). At rest, no dependent variables changed throughout the study. At maximum clenching, masticatory muscle activity immediately dropped significantly but returned to baseline values and was equal to the control group at 1-3 months. The ABP group had significantly lower masseter activity and AC than the TBP group after insertion. Neither POC nor MBF were significantly different within or between groups. Masticatory muscle activity reduced after anterior bite plane insertion but returned to baseline after 1-3 months. Masseter activity decreased significantly more in the ABP group than TBP group. Neither appliance significantly affected POC or MBF. Thai Clinical Trial Registry (TCTR20210330002).
Publisher: Wiley
Date: 02-12-2022
DOI: 10.1111/JOOR.13395
Abstract: Bilateral Class II intermaxillary elastics (CII elastics) are commonly used in orthodontics however, the effects of CII elastics on masticatory muscle activity and the occlusal contact area have not been studied. To evaluate the short-term effects of CII elastics on masticatory muscle activity balance, occlusal contact area, and masticatory performance in a group of adult orthodontic patients after three months. Forty-three patients with a <3 mm Class II molar relationship receiving ongoing treatment with fixed appliances were recruited. The experimental group (n=21) wore CII elastics (100-150 g/side) full time the control group (n=22) did not wear CII elastics. Surface electromyography, the areas of occlusal contact and near contact (ACNC), and the median particle size of a test food were assessed prior to (T0), and after one (T1) and three months (T2). Within- and between-group differences were analyzed and the relationships between changes in dependent variables were examined (α=0.05). At T2, the experimental group showed better masticatory muscle activity balance (P<0.001) and masticatory performance (P<0.05) than controls. Both masticatory muscle activity balance (P<0.001) and masticatory performance (P<0.001) significantly improved in the experimental group between T0 and T2. The changes in masticatory muscle activity balance and masticatory performance were significantly related (P 0.05). After three months, CII elastics improved masticatory muscle activity balance, which led to better masticatory performance.
Publisher: Informa UK Limited
Date: 13-05-2020
Publisher: Wiley
Date: 03-03-2019
DOI: 10.1111/OCR.12301
Abstract: To investigate the effects of 30 and 60 Hz vibratory stimulus on canine distalization and RANKL and OPG secretion. Sixty patients requiring canine distalization at the Orthodontic Clinic, Prince of Songkla University. Patients were randomly assigned to 30 Hz vibration (n = 20), 60 Hz vibration (n = 20), or the control group (n = 20). Modified electric toothbrushes were used to apply vibration to the randomly selected canine for 20 min/day by the investigator combined with 60 cN continuous distalization force from day 1 to day 7. RANKL and OPG were analysed before (T1) and 24 hours (T2), 48 hours (T3) and 7 days (T4) after initiation of distalization. From day 8, vibratory devices were used by the subjects at home. Rate of canine distalization (T1 to 3 months after initiation [T5]) was calculated. Kruskal-Wallis tests were used for multiple comparisons (significance level, 0.05). Canine distalization rate was not different between groups (median 0.82, 0.87, and 0.83 mm/month for 30, 60 Hz, and control group, respectively P > 0.05). No within- or between-group differences in RANKL and OPG were observed (P > 0.05), except RANKL on the compression side of the control group was significantly higher at T2, T3 and T4 than T1 (P < 0.001). In the clinic, 30 and 60 Hz vibratory stimulus have no additive effect on rate of canine distalization rate, RANKL and OPG secretion or RANKL/OPG ratio.
Location: Thailand
No related grants have been discovered for Udom Thongudomporn.