Arvind Tripathi1, Ashutosh Gupta2, Varun Arora3. 1. Postgraduate Studies and Research, Saraswati Dental College and Hospital, Lucknow, Uttar Pradesh, India. 2. Department of Prosthodontics, Saraswati Dental College and Hospital, Lucknow, Uttar Pradesh, India. 3. APS, Lucknow, Uttar Pradesh, India.
Abstract
PURPOSE: To establish a correlation between the effective internal diameter of the maxillary defect, the resonating frequency, and the effectiveness of the definitive obturator in reducing the percentage nasality. MATERIALS AND METHODS: Twenty-nine patients who underwent maxillectomy confined only to the hard palate (Aramany's class I and class II defect) and were wearing a definitive obturator for at least 3 months were included. The percentage nasality and resonating frequency were calculated with the help of Praat software. The patients were asked to read out a "Rainbow" passage and also to phonate and articulate vowels. Both parameters were assessed with and without the obturator prosthesis. RESULTS: Following obturator use, a mean change of 1.07 ± 0.83 kHz was observed in the resonating frequency (p < 0.001). The percentage change in resonating frequency was found to be 27.48 ± 4.99% following obturator use (p < 0.001). The effective internal diameter of the maxillary defect was calculated with the help of a Vernier calliper. The correlation between absolute and percentage values of resonating frequency and nasality before and after obturator use was found to be negative. CONCLUSION: This study found that efficacy of the obturator prosthesis in reducing nasality was greater in smaller defects than in large defects.
PURPOSE: To establish a correlation between the effective internal diameter of the maxillary defect, the resonating frequency, and the effectiveness of the definitive obturator in reducing the percentage nasality. MATERIALS AND METHODS: Twenty-nine patients who underwent maxillectomy confined only to the hard palate (Aramany's class I and class II defect) and were wearing a definitive obturator for at least 3 months were included. The percentage nasality and resonating frequency were calculated with the help of Praat software. The patients were asked to read out a "Rainbow" passage and also to phonate and articulate vowels. Both parameters were assessed with and without the obturator prosthesis. RESULTS: Following obturator use, a mean change of 1.07 ± 0.83 kHz was observed in the resonating frequency (p < 0.001). The percentage change in resonating frequency was found to be 27.48 ± 4.99% following obturator use (p < 0.001). The effective internal diameter of the maxillary defect was calculated with the help of a Vernier calliper. The correlation between absolute and percentage values of resonating frequency and nasality before and after obturator use was found to be negative. CONCLUSION: This study found that efficacy of the obturator prosthesis in reducing nasality was greater in smaller defects than in large defects.
Authors: Massimo Corsalini; Giuseppe Barile; Santo Catapano; Annamaria Ciocia; Assunta Casorelli; Rosaria Siciliani; Daniela Di Venere; Saverio Capodiferro Journal: Int J Environ Res Public Health Date: 2021-11-28 Impact factor: 3.390