Evaluation of cross-section airway configuration of obstructive sleep apnea

Ogawa, Takumi; Enciso, Reyes; Shintaku, Werner H.; Clark, Glenn T.

doi:10.1016/j.tripleo.2006.06.008

Cited by 224 publications

(173 citation statements)

References 22 publications

(11 reference statements)

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“…A variety of studies that evaluate the airway volume in symptomatic and nonsymptomatic patients have been published. [9][10][11][12][13][14] Most of these studies focused on the possible associations between airway and skeletal structures, soft tissues, and musculature. However, the effects of orthodontic treatment, specifically the effects of four premolar extractions vs nonextraction treatment approaches on airway volume, have never been discussed in the literature.…”

Section: Introductionmentioning

confidence: 99%

Effects of extraction versus non-extraction treatment on oropharyngeal airway volume

Valiathan

Hans

et al. 2010

The Angle Orthodontist

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Objective: To compare the effects of extraction vs nonextraction orthodontic treatments on oropharyngeal airway volume. Materials and Methods: An existing patient database was screened for pretreatment (T0) and posttreatment (T1) cone beam computed tomography (CBCT) scans and complete medical histories. Twenty patients treated with removal of four premolars (ExtG) and 20 controls (NExtG), were matched for age, gender, ethnicity, height, weight, body mass index, and oropharyngeal (OP) volumes, among other variables. Constructed lateral cephalograms (three skeletal and four dental variables) and OP volumes were measured at T0 and T1 using Dolphin Imaging 11.0. Independent sample t-tests were used to compare the groups at T0 and the outcome variables at T1. Paired sample t-tests were used to compare the mean changes from T0 to T1. Statistical significance was set at P # .05. Results: Changes from T0 to T1 were found to be significant in both groups for CoA, CoGn, U1-FH, and IMPA. In the ExtG alone, U1-Na Perp and L1-Na Perp were also significantly different from T0 to T1. Despite the observed differences, no significant differences were found at the end of treatment between the mean OP volumes for either group (12,675.6 6 4483.6 for ExtG; 12,002.7 6 2857.0 for NExtG, P . .05). Similarly, the mean changes in OP volume (1082.6 mm 3 and 1701.1 mm 3 for ExtG and NExtG, respectively) and increase in mean minimal constricted axial areas (17.4 mm 2 and 1.9 mm 2 for ExtG and NExtG, respectively, P . .05) from T0 to T1 were not significant for the two groups. Conclusion: Extraction of four premolars with retraction of incisors does not affect OP airway volume.

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Section: Introductionmentioning

confidence: 99%

Effects of extraction versus non-extraction treatment on oropharyngeal airway volume

Valiathan

Hans

et al. 2010

The Angle Orthodontist

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“…Bayram et al compared the mandibular condyle volume measurements done using the Cavalieri principle on CBCT images with physical volume measurements via Archimedean principle. They concluded that the Cavalieri principle is a valid tool for volume estimation of the mandibular condyle [13].There are also reports showing the use of CBCT in estimating the volume of teeth, pulp chamber, mandibular condyle, and upper airway volume [13][14][15][16][17]. In our previous study, we evaluated the accuracy of the volume assessment of the intraosseal defects using CBCT sections with a thickness of 0.2 mm.…”

Section: Discussionmentioning

confidence: 99%

“…In literature, there are quantitative studies carried out on the use of CBCT systems and software in dental volumetric analysis [4,[10][11][12][13][14][15][16][17]; however, the effect of section thickness on the accuracy of the volume estimate obtained by using CBCT has not been researched in these studies.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Slice Thickness on the Assessment of Bone Defect Volumes by the Cavalieri Principle Using Cone Beam Computed Tomography

2012

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The purpose of this study was to investigate the possible effects of section thickness on volume estimations obtained by cone beam computed tomography. Intraosseal cavities representing bone defects on vestibular sides of the two dry sheep mandibles were scanned by a cone beam computed tomography system. Consecutive sections at 0.2, 0.6, 1, 1.4, and 2.2 mm thickness were used to estimate the volumes of the cavities using the Cavalieri principle of stereological methods. Estimated volumes are then compared with the volumes obtained by the Archimedean principle. In 0.2-, 0.6-, and 1-mm-thick slices, the volumes estimated by the Cavalieri principle did not differ from the volumes by the Archimedean principle (p > 0.05). The 0.2 mm slice-thickness group had the highest asymptotic significance value (p 00.6). Although the thinnest slice appears to provide the most accurate values, slice thickness up to 1 mm can be chosen for volume calculations on CBCT images.

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“…Clinicians can more easily perform the volumetric measurements and also calculate the cross-sectional areas of the airway in 3 planes of space: coronal, sagittal, and axial. In addition, the option provided by some softwares for detecting and measuring the most constricted area in the airway provides essential diagnostic clinical information especially in obstructive sleep apnea patients (Ogawa et al, 2007;Aboudara et al, 2009;Abramson et al, 2010) (Figures 8 and 9). …”

Section: Cone Beam Computed Tomography and Airway Analysismentioning

confidence: 99%