Nikhil, S Rajan (2013) Evaluation of Speech in Maxillary defects and Its Correction using Palatography: An In-Vivo Study. Masters thesis, Sree Mookambika Institute of Dental Sciences, Kulashekharam.
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Abstract
INTRODUCTION: Most of the literature review is on speech analysis and correction of palatal defects. These defects are either corrected by surgical procedures or prosthetic rehabilitation. Even after surgical correction some patients need prosthesis for speech correction and to prevent nasal regurgitation of food. Few of the patients are entirely dependent on prosthesis rehabilitation alone since, surgical correction is not possible when the defects are large due to excision as in cases of oral cancer, trauma or unrepaired clefts. This study is an attempt to present that the prosthesis alone may not totally correct speech defects and palatography is an inevitable tool for correcting articulatory defects thereby improving speech. It was observed that the prosthesis alone can correct speech defects, yet the clarity of certain vowels and volume of mouth was found to be defective since with the help of palatography and modification of the existing prosthesis the exact articulation of these sounds can be corrected. MATERIALS AND METHODS: 1. Percentage of consonants correct for 20 words (regional language) was used to assess the intelligibility at three clinical Intervals (Before correction of the defect , after correction of the defect with prosthesis and after modifying the prosthesis using palatography). 2. Nasometer (Dr Speech) was used to assess the nasalance for three vowels |a|, |i| and |u| at three clinical intervals (Before correction of the defect , after correction of the defect with prosthesis and after modifying the prosthesis using palatography). 3. Formant evaluation (f0-f5) for three vowels |a|, |i| and |u| was done using PRAAT software at three clinical visits (Before correction of the defect , after correction of the defect with prosthesis and after modifying the prosthesis using palatography). RESULTS: Modified prosthesis using palatography was found to be significantly superior in terms of intelligibility, nasality and formant evaluation showing a higher significance for all the three methods namely Percentage of consonants correct, Nasometer and PRAAT software. CONCLUSION: As per the results obtained, in patients with cleft palate, it was clearly evident that palatal obturators modified by palatography showed a significance of P< 0.001 in terms of nasality and intelligibility. In spectrographic evaluation using PRAAT software the significance level was found to be P<0.05 for all the three vowels using a modified obturator prosthesis.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Speech ; Maxillary defects ; Palatography ; In-Vivo Study. |
| Subjects: | DENTAL > Prosthodontics and Crown and Bridge |
| Depositing User: | Subramani R |
| Date Deposited: | 15 Nov 2017 02:28 |
| Last Modified: | 15 Nov 2017 02:28 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/3950 |
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