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  • 1
    In: Orthodontics & Craniofacial Research, Wiley, Vol. 25, No. 4 ( 2022-11), p. 569-575
    Abstract: The aim of this study was to compare the intra‐oral bacterial profile of normal‐weight and obese adolescents prior to orthodontic treatment with fixed appliances. Materials and methods Nineteen adolescent patients were recruited into two groups based upon body mass index (BMI) and classified as normal‐weight or obese. Unstimulated whole mouth saliva was obtained for 5 minutes. Bacterial DNA extraction was performed from saliva, and 16S rRNA gene sequencing of the V1‐2 variable regions was undertaken followed by analysis using the mothur pipeline. Results Saliva from a total of 19 adolescent patients with mean (SD) age 15.6 (1.8) years were divided into 10 normal‐weight with mean BMI of 19.4 (2.2) kg/m 2 and 9 obese with mean BMI of 30.2 (3.5) kg/m 2 . A total of 156 783 sequences were obtained from the 19 samples with no significant differences in richness or diversity between sample groups by obesity status or gender (AMOVA). The bacterial community in both groups was dominated by bacterial genera characteristic of the human mouth, which included Streptococcus, Porphyromonas, Veillonella, Gemella, Prevotella, Fusobacterium and Rothia . Conclusion There were no differences in alpha or beta diversity of oral bacterial communities between normal‐weight and obese orthodontic patients. Obese adolescents attending for orthodontic treatment had a similar microflora to their normal‐weight counterparts.
    Type of Medium: Online Resource
    ISSN: 1601-6335 , 1601-6343
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2076514-9
    detail.hit.zdb_id: 2098407-8
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  • 2
    Online Resource
    Online Resource
    Elsevier BV ; 2022
    In:  American Journal of Orthodontics and Dentofacial Orthopedics Vol. 161, No. 1 ( 2022-01), p. 20-36
    In: American Journal of Orthodontics and Dentofacial Orthopedics, Elsevier BV, Vol. 161, No. 1 ( 2022-01), p. 20-36
    Type of Medium: Online Resource
    ISSN: 0889-5406
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 356699-7
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  • 3
    Online Resource
    Online Resource
    The Angle Orthodontist (EH Angle Education & Research Foundation) ; 2019
    In:  The Angle Orthodontist Vol. 89, No. 6 ( 2019-11-01), p. 930-935
    In: The Angle Orthodontist, The Angle Orthodontist (EH Angle Education & Research Foundation), Vol. 89, No. 6 ( 2019-11-01), p. 930-935
    Abstract: 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 & lt; .0001), there were no statistically significant differences in essential demographics between groups. Significantly increased levels of the adipokine leptin (P & lt; .009) and the tissue-remodeling biomarker matrix metalloproteinase-9 (MMP9; P & lt; .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.
    Type of Medium: Online Resource
    ISSN: 0003-3219 , 1945-7103
    RVK:
    Language: English
    Publisher: The Angle Orthodontist (EH Angle Education & Research Foundation)
    Publication Date: 2019
    detail.hit.zdb_id: 390289-4
    detail.hit.zdb_id: 2026352-1
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  • 4
    Online Resource
    Online Resource
    Elsevier BV ; 2023
    In:  American Journal of Orthodontics and Dentofacial Orthopedics Vol. 163, No. 2 ( 2023-02), p. 154-172
    In: American Journal of Orthodontics and Dentofacial Orthopedics, Elsevier BV, Vol. 163, No. 2 ( 2023-02), p. 154-172
    Type of Medium: Online Resource
    ISSN: 0889-5406
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 356699-7
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  • 5
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2023
    In:  Scientific Reports Vol. 13, No. 1 ( 2023-01-12)
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 13, No. 1 ( 2023-01-12)
    Abstract: Orthodontic tooth movement (OTM) occurs through proteolytic remodelling within the periodontium following the application of external force to the tooth. This study describes the first characterization of the salivary peptidome and protease profile during the alignment stage of fixed appliance orthodontic treatment. Unstimulated whole mouth saliva from 16 orthodontic patients (10 males, 6 females, mean (SD) age 15.2 (1.6) years) was collected prior to fixed appliance placement (T1), 1-h (T2), 1-week (T3) following fixed appliance placement and on completion of mandibular arch alignment (T4). Salivary peptides were extracted using filtration followed by mass spectrometry to identify amino acid sequences. Protease prediction was carried out in silico using Proteasix and validated with gelatin zymography and enzyme-linked immunosorbent assay. A total of 2852 naturally-occurring peptides were detected, originating from 436 different proteins. Both collagen and statherin-derived peptide levels were increased at T2. Proteasix predicted 73 proteases potentially involved in generating these peptides, including metalloproteinases, calpains and cathepsins. Changes in predicted activity of proteases over time were also observed, with most metalloproteinases showing increased predicted activity at T2–T3. Increased gelatinolytic activity and MMP8/MMP9 levels were detected at T3. Collectively, multiple protein targets and changes in protease-predicted activity during OTM have been identified.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2615211-3
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