Volume 12, Issue 3 (2023)                   WJPS 2023, 12(3): 44-56 | Back to browse issues page

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Ghaemi H, Grillo R, Alizadeh O, Shirzadeh A, Ejtehadi B, Torkzadeh M et al . What Is the Effect of Maxillary Impaction Orthognathic Surgery on Voice Characteristics? A Quasi-Experimental Study. WJPS 2023; 12 (3) :44-56
URL: http://wjps.ir/article-1-1188-en.html
1- Department of Speech Therapy, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
2- Department of Oral & Maxillofacial Surgery, Traumatology and Prosthesis – Faculty of Dentistry of the University of São Paulo, Brazil
3- Student Research Committee, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
4- Department of Oral & Maxillofacial Surgery, Mashhad Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
5- Dental Research Center, Mashhad Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
6- Department of Oral & Maxillofacial Surgery, Mashhad Dental School, Mashhad University of Medical Sciences, Mashhad, Iran , SamieeRadS@mums.ac.ir
Abstract:   (1046 Views)
Background: Regarding the impact of orthognathic surgery on the airway and voice, this study was carried out to investigate the effects of maxillary impaction surgery on patients' voices through acoustic analysis and articulation assessment.
Methods: This quasi-experimental, before-and-after, double-blind study aimed at examining the effects of maxillary impaction surgery on the voice of orthognathic surgery patients. Before the surgery, a speech therapist conducted acoustic analysis, which included fundament frequency (F0), Jitter, Shimmer, and the harmonic-to-noise ratio (HNR), as well as first, second, and third formants (F1, F2, and F3). The patient's age, sex, degree of maxillary deformity, and impaction were documented in a checklist. Voice analysis was repeated during follow-up appointments at one and six months after the surgery in a blinded manner. The data were statistically analyzed using SPSS 23, and the significance level was set at 0.05.
Results: Twenty two patients (18 females, 4 males) were examined, with ages ranging from 18 to 40 years and an average age of 25.54 years. F2, F3, HNR, and Shimmer demonstrated a significant increase over the investigation period compared to the initial phase of the study (P <0.001 for each). Conversely, the Jitter variable exhibited a significant decrease during the follow-up assessments in comparison to the initial phase of the study (P< 0.001).
Conclusion: Following maxillary impaction surgery, improvements in voice quality were observed compared to the preoperative condition. However, further studies with larger samples are needed to confirm the relevancy.
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Type of Study: Original Article | Subject: Special
ePublished: 2023/12/30

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