Effects of a mandibular repositioner on obstructive sleep apnea

Liu, Yuehua; Zeng, Xianglong; Fu, Meng; Huang, Xizhen; Lowe, Alan A.

doi:10.1067/mod.2000.104831

Cited by 93 publications

(70 citation statements)

References 22 publications

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“…The cephalometric landmarks and analyses (Table 1, Fig. 1) for pharyngeal and hyoid bone were based on the methods described by Lowe et al, 12 Liu et al, 13 and Zhong et al 14 The pre-and postcephalograms for all the patients were traced on the acetate tracing paper by the same investigator. To check reproducibility error, the radiographs were again traced by the same investigator after 02 and 04 months.…”

Section: Methodsmentioning

confidence: 99%

Effect of retraction of anterior teeth on pharyngeal airway and hyoid bone position in Class I bimaxillary dentoalveolar protrusion

Bhatia

Jayan

Chopra³

2016

Medical Journal Armed Forces India

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m e d i c a l j o u r n a l a r m e d f o r c e s i n d i a 7 2 ( 2 0 1 6 ) s 1 7 -s 2Background: To test the hypothesis that the retraction of anterior teeth has no effect on the dimensions of pharyngeal airway and to evaluate the retraction of anterior teeth on each parameter of pharyngeal airway. Methods: Twenty-two adult patients of Class I bimaxillary protrusion requiring first premolar extractions with maximum anchorage requirements were selected. The pharyngeal airway and dentofacial parameters of the patients were compared using pre-and posttreatment lateral cephalograms with the help of Student's paired t-test (P < 0.05). The relationship between airway size and dentofacial parameters was also evaluated using Pearson correlation coefficient. Results: The upper and lower lips were retracted by 2.25 and 5.4 mm after retraction of the incisors. The tips of upper and lower incisors were retracted by 7.75 and 7.15 mm, respectively. There was a statistically significant decrease in SPP-SPPW (P < 0.05), U-MPW (P < 0.001), TB-TPPW (P < 0.001), and change in HRGN (P < 0.01). A significant correlation was observed between the amount of retraction of lower incisor and decrease in the pharyngeal airway posterior to soft palate (r = 0.102), tongue (r = 0.322), and change in HRGN (r = 0.265). Conclusions: The size of the pharyngeal (velopharyngeal and glossopharyngeal) airway reduced and hyoid bone position changed after retraction of the incisors in extraction space in bimaxillary protrusive adult patients. #

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Section: Methodsmentioning

confidence: 99%

Effect of retraction of anterior teeth on pharyngeal airway and hyoid bone position in Class I bimaxillary dentoalveolar protrusion

Bhatia

Jayan

Chopra³

2016

Medical Journal Armed Forces India

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“…All pretreatment and posttreatment cephalograms were taken from the same machine by the same operator and the linear magnification of the machine was 11%. The subjects were divided into two groups according to the FH/MP angle before treatment: Figures 1 and 2) were based on the methods described previously by Lowe et al, 11 Liu et al, 12 and Zhong et al 13 Two serial cephalograms from each subject were traced by the same investigator.…”

Section: Methodsmentioning

confidence: 99%

Changes of pharyngeal airway size and hyoid bone position following orthodontic treatment of Class I bimaxillary protrusion

Wang

Jia

Anderson

et al. 2011

The Angle Orthodontist

102

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Objectives: To test the hypothesis that the sagittal position of the anterior teeth has no effect on pharyngeal airway dimension or hyoid bone position and to investigate the influence of orthodontic retraction of the anterior teeth on each section of pharynx and hyoid position. Materials and Methods: Forty-four Class I bimaxillary protrusion adults, treated with preadjusted appliances and maximum anchorage after extraction of four premolars, were divided into two groups according to their vertical craniofacial skeletal patterns. Pretreatment and posttreatment variables were compared using paired t-test, and the relationship between pharyngeal airway size and dentofacial variables was analyzed using Pearson correlation coefficient. The changes of pharyngeal airway size and hyoid position after treatment were compared between two groups using independent t-test. Results: Upon retraction of the incisors, the upper and lower lips were retracted by 2.60 mm and 3.87 mm, respectively. The tip of upper incisor was retracted by 6.84 mm and lower incisor retracted by 4.95 mm. There was significant decrease in SPP-SPPW, U-MPW, TB-TPPW, V-LPW, VAL, C3H, and SH (P , .05). No statistically significant different changes were observed in the dentofacial structures, pharyngeal airway, and hyoid position between the two groups after the treatment. There was a significant correlation between the retraction distance of lower incisor and the airway behind the soft palate, uvula, and tongue. Conclusions: The pharyngeal airway size became narrower after the treatment. Extraction of four premolars with retraction of incisors did affect velopharyngeal, glossopharyngeal, hypopharyngeal, and hyoid position in bimaxillary protrusive adult patients. (Angle Orthod. 2012;82:115-121.)

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“…16 A reduction in sleep fragmentation, mid-sleep wake time and arousals has been demonstrated. Subjective improvement is an almost consistent finding 25,27 and may be present in the absence of improvement in respiratory disturbance index. 26 The present study is a retrospective report on the effects of mandibular advancement splints in two distinct subject groups, non-apnoeic snorers and subjects with obstructive sleep apnoea, using subjective and objective outcome measures.…”

Section: Introductionmentioning

confidence: 65%

“…The review of literature by Schmidt-Nowara et al 16 found a 50% reduction in 70% of the 271 cases involved; however only 51% reached a normal value (respiratory disturbance index <10); some did not improve or became worse; and 39% with a baseline respiratory disturbance index of >20 remained above that level. Treatment success was related to the initial respiratory disturbance index in three studies reviewed and this has been reported by other authors, 25,26 although this is not a consistent finding. Increase in respiratory disturbance index scores with mandibular advancement splint therapy has also been substantiated by more recent studies.…”

Section: Introductionmentioning

confidence: 68%

The effect of a mandibular advancement splint in subjects with sleep-related breathing disorders

et al. 2005

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Effects of a mandibular repositioner on obstructive sleep apnea

Cited by 93 publications

References 22 publications

Effect of retraction of anterior teeth on pharyngeal airway and hyoid bone position in Class I bimaxillary dentoalveolar protrusion

Effect of retraction of anterior teeth on pharyngeal airway and hyoid bone position in Class I bimaxillary dentoalveolar protrusion

Changes of pharyngeal airway size and hyoid bone position following orthodontic treatment of Class I bimaxillary protrusion

The effect of a mandibular advancement splint in subjects with sleep-related breathing disorders

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