![]() ![]() To maintain anterior oral seal (21) and that this lipĪctivity is increased in children with incompetent lipsĬhanges in peak pressure at the anterior palatal site Reported that the upper and lower lips act in unison This is consistent with previous findings, which have This is likely due to the increased distance between the lips, which resulted in both upperĪnd lower lips requiring more extension, and subsequently more pressure to establish anterior oral seal. The lips were stronger than those recorded at the ![]() Were not significantly affected by gender, which is inĪgreement with earlier research (3, 17, 18, 19, 20).Īs OVD increased, the peak pressures generated by That intra-individual swallow patterns are reproducible across trials and days. These results areĬonsistent with previous research (2, 3) and indicate Swallowing patterns remained similar across each trialĪnd demonstrated reproducibility. The mean peak pressure, time to peak and swallowĭuration within each tray did not vary significantlyĪcross each experimental trial. The surface of the upper central incisors. Upper incisor position, the labial and just palatal to Therefore, this researchįocused on the two sites most likely to affect the Relapse of AOB following orthodontic treatment in It hasīeen suggested that lack of adaptation of the soft tissues to a new incisor position may play a role in the Perioral musculature during water swallowing. The present study aimed to determine the effect of anĪcute change in OVD on intraoral pressure and the Heights, although the recovery from the swallowĮvent was variable across each tray (Fig. The initiation of the swallow eventĪppeared to be uniform across the different OVD Variation, although the overall pattern of the swallow Pressure and timing of the swallow showed some The OVD was increased for each subject, the peak Surface was visually analysed for all participants. Pressure behaviour observed at the anterior palatal Column graph showing mean electromyographic (EMG)Īctivity of the upper and lower lips (data pooled) versus tray. Column graph showing mean peak pressure (a) and mean swallow duration (b) at the anterior palatal sensor versus tray.Įrror bars represent 1 standard error of the mean.įig. SWALLOWING AND OCCLUSAL VERTICAL DIMENSIONįig. Trays were all significantly higher (P < 001) than EMGĪctivity when the OVD remained unaltered. Post hoc comparison revealed that the EMGĪctivity for the 2 mm, 4 mm, 6 mm and maximum Increased as OVD was increased (F = 147, P < 0001) There was no significant difference between EMGĪctivity of the upper and lower lip (F = 147, P = 001) at lip level and by 264 per cent ( 270 ms Threefold ( 21 kPa P ≤ 0001), where as swallowĭuration increased by 127 per cent ( 160 ms Peak pressure during swallowing increased almost Swallows have been reported when bolus taste or Differences in peak pressure and duration of That each individual has a ‘signature’ swallow pattern Interindividual variation (5, 6), it has been shown This remains elusive due to the high amount of To define a generic swallow pattern (2–4). A number of authors have investigated the nature of interactions between the tongueĪnd the palate during water swallows in an attempt The musculature of the mouth, pharynx, larynx and Humans, as it requires precise, sequential control of Swallowing is one of the most complex reflexes in Peak pressure and lip EMG peak activity wereĪssessed for each swallow. Waveforms were quantitatively and qualitativelyĪnalysed. Swallowing tasks were performed repetitively Tasks as the OVD was progressively increased using Ten volunteers (five female, five male Ģ7–32 years) repeated standardised swallowing Perioral electromyographic activity (EMG) during On intraoral pressure swallow patterns and Research was to determine the effects of acuteĬhange in occlusal vertical dimension (OVD) Relationship between swallowing and malocclusion SUMMARY Abnormal swallow patterns have beenĪssociated with specific dentofacial traits, such asĪn anterior open bite, but the cause–effect ![]() FARELLAįaculty of Dentistry, University of Otago, Dunedin, New Zealand ![]() Patterns and perioral electromyographic activity Journal of Oral Rehabilitation 2016 43 481–487Įffect of occlusal vertical dimension on swallowing ![]()
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