Voice characteristics before versus after mandibular setback surgery in patients with mandibular prognathism using nonlinear dynamics and conventional acoustic analyses

Mishima, Katsuaki; Moritani, Norifumi; Nakano, Hirofumi; Matsushita, Asuka; Iida, Seiji; Ueyama, Yoshiya

doi:10.1016/j.jcms.2012.01.021

Cited by 20 publications

(52 citation statements)

References 16 publications

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“…However, a different trend was observed in other studies, since the authors found no significant differences in the means of f0 between men with class III malocclusion before orthognathic surgery compared to controls [8] and between individuals with class III malocclusion and normal individuals [2]. The second study did not assess specific vowels and only considered means of spontaneous speech segments, which may account for such findings [2].…”

Section: Discussionmentioning

confidence: 90%

“…It may have been influenced by the anatomical characteristics themselves, such as the larger protruding jaw [16]. However, another study observed lower values of F1 and F2 only in the vowel [a] in men with class III in relation to their controls, which demonstrates elevation and posteriorization of the tongue [8]. This punctual difference, with opposite tendency to other researches may probably be related to muscular adjustments during the speech production performed by these individuals [8].…”

Section: Discussionmentioning

confidence: 99%

“…The f0, F1 and F2 frequencies of the [a], [i], [u], [e] and [o] vowels were studied in men with class III before and after mandibular setback surgery and compared to a control group. In comparison to normal individuals, the F1 and F2 frequencies of [a] were significantly lower before mandibular setback surgery and became even lower after the surgery [8].…”

Section: Introductionmentioning

confidence: 99%

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Acoustic Analysis of Voice and Speech in Men with Skeletal Class III Malocclusion: A Pilot Study

Viegas

Viegas²,

Guimarães³

et al. 2020

Folia Phoniatr Logop

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Objectives: To assess the fundamental (f0) and first third formant (F1, F2, F3) frequencies of the 7 oral vowels of Brazilian Portuguese in men with skeletal class III malocclusion and to compare these measures with a control group of individuals with Angle’s class I. Methods: Sixty men aged 18–40 years, 20 with Angle’s class III skeletal malocclusion and 40 with Angle’s class I malocclusion were selected by speech therapists and dentists. The speech signals were obtained from sustained vowels, and the values of f0 and frequencies of F1, F2 and F3 were estimated. The differences were verified through Student’s t test, and the effect size calculation was performed. Results: In the class III group, more acute f0 values were observed in all vowels, higher values of F1 in the vowels [a] and [ε] and in F2 in the vowels [a], [e] and [i] and lower F1 and F3 values of the vowel [u]. Conclusion: More acute f0 values were found in all vowels investigated in the class III group, which showed a higher laryngeal position in the production of these sounds. The frequencies of the first 3 formants showed punctual differences, with higher values of F1 in the vowels [a] and [ε] and of F2 in [a], [e] and [i], and lower values of F1 and F3 in the vowel [u] in the experimental group. Thus, it is concluded that the fundamental frequency of the voice was the main parameter that differentiated the studied group from the control.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Acoustic Analysis of Voice and Speech in Men with Skeletal Class III Malocclusion: A Pilot Study

Viegas

Viegas²,

Guimarães³

et al. 2020

Folia Phoniatr Logop

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“…According to Niemi et al, compensatory movements of the tongue and mandible enabling normal incisor relations could occur in patients with class II malocclusion, and no significant changes in pronunciation were observed after mandibular advancement. However, this outcome may not be relevant to patients with class III malocclusion, and only a few studies of the structural changes in pronunciation and articulation after a mandibular setback have been conducted, there is no consensus on the effects of mandibular setback on the speech and voice (Fairbanks and Lintner, 1951;Hassan et al, 2007;Mishima et al, 2013). According to the author's previous study, patients with Angle's class III malocclusion showed a larger aperture for low vowels and a forwarding of the back vowels compared with occlusion patients.…”

Section: Introductionmentioning

confidence: 99%

Acoustic analysis of vowel sounds before and after orthognathic surgery

Ahn

Kim

et al. 2015

Journal of Cranio-Maxillofacial Surgery

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“…The shaping of the vocal tract using the lips, tongue, jaw, and velum for speech output is called articulation; the lips, tongue, jaws, and velum are the articulators. [1][2][3][4] Assuming normal orofacial structures, individuals typically acquire the appropriate shaping of the vocal tract for the sounds of their language according to common developmental patterns entitled phonological development. 1,4,5 The consonants produced in any language can be described by their distinctive features as follows: 1) the place of production; 2) the degree of constriction between the two articulators; 3) the path of emission or energy enhancement, via the mouth versus the nose; and 4) the voicing, whether or not the vocal folds are in vibration.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Bimaxillary Orthognathic Surgery on Nasalance, Articulation Errors, and Speech Intelligibility in Skeletal Class III Deformity Patients

Ghaemi

Emrani

Labafchi

et al. 2021

wjps

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BACKGROUND We aimed to detect the changes in nasalance, articulation errors, and speech intelligibility after bimaxillary orthognathic surgery in skeletal class III patients. METHODS This double-blinded before and after quasi-experimental study was conducted in the Department of Maxillofacial Surgery, Qaem Hospital, Mashhad, Iran from Mar 2019 to Apr 2020. The main intervention was maxillary advancement with LeFort I osteotomy and mandibular setback surgery with bilateral sagittal split osteotomy (BSSO). The nasalance score, speech intelligibility, and articulation errors were evaluated one week preoperatively (T 0 ), 1 and 6 months (T 1 , T 2 ) postoperatively by a speech therapist. The significance level was set at 0.05 using SPSS 21. RESULTS Eleven women (55%) and 9 men (45%) with a mean age of 31.95 ± 4.72 yr were enrolled. The mean maxillomandibular discrepancy was 6.15 ± 1.53 mm. The mean scores of nasalance for the oral, nasal, and oral-nasal sentences were significantly improved postoperatively ( P <0.001). Pre-operative articulation errors of consonants /r/, /z/, /s/ and /sh/ were corrected following the surgery. The percentage of speech intelligibility was significantly increased over time ( P <0.001). CONCLUSION The patients might show a normal articulation pattern and a modified nasalance feature, following maxillary advancement plus mandibular setback surgery.

show abstract

Voice characteristics before versus after mandibular setback surgery in patients with mandibular prognathism using nonlinear dynamics and conventional acoustic analyses

Cited by 20 publications

References 16 publications

Acoustic Analysis of Voice and Speech in Men with Skeletal Class III Malocclusion: A Pilot Study

Acoustic Analysis of Voice and Speech in Men with Skeletal Class III Malocclusion: A Pilot Study

Acoustic analysis of vowel sounds before and after orthognathic surgery

The Effect of Bimaxillary Orthognathic Surgery on Nasalance, Articulation Errors, and Speech Intelligibility in Skeletal Class III Deformity Patients

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