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EnglishObjectives: To investigate possible changes and/or device-related impairments in phonetic habits produced by rapid maxillary expansion (RME). Materials and Methods: Thirty-five patients scheduled for RME were divided into two groups: Group A (banded two-arm Hyrax) and Group B (banded four-arm Hyrax). Speech samples were collected at six time points, before, during and after RME removal. Acoustical analysis was performed using PRAAT and BioVoice analysis tools. Ten volunteers completed a questionnaire on the acceptability of patient's speech. Maxillary dimensions and palatal volume were measured on dental casts before and after expansion using a digital gauge. Results: Voice analysis showed an increase in the peak frequency of fricative consonants (/s/,/ʃ/) after expansion, whereas there was no change of formant frequencies of palatal consonants (/ɲ/,/ʎ/). Vowel /i/ displayed a lowering of the first formant frequency, and an increase in the second and third formant frequencies. After bonding, Group B showed both a greater reduction in the peak frequency of fricatives and a greater increase in the formant frequencies of palatal consonants than Group A. Conclusion: Rapid maxillary expansion causes a slight phonetic change in the acoustical parameters of both consonants and vowels. The two-arm Hyrax caused less speech impairment than the four-arm Hyrax during the treatment.
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| Data di pubblicazione: | 2017 | |
| Titolo: | Phonetic analysis during treatment with rapid maxillary expander | |
| Autori: | Biondi, E; Bandini, A.; Lombardo, L.; Orlandi, S.; Siciliani, G.; Manfredi, C. | |
| Rivista: | ORTHODONTICS & CRANIOFACIAL RESEARCH | |
| Parole Chiave: | maxillary expansion; palate; phonetics; speech acoustic; Orthodontics; Surgery; Oral Surgery; Otorhinolaryngology2734 Pathology and Forensic Medicine | |
| Abstract in inglese: | Objectives: To investigate possible changes and/or device-related impairments in phonetic habits produced by rapid maxillary expansion (RME). Materials and Methods: Thirty-five patients scheduled for RME were divided into two groups: Group A (banded two-arm Hyrax) and Group B (banded four-arm Hyrax). Speech samples were collected at six time points, before, during and after RME removal. Acoustical analysis was performed using PRAAT and BioVoice analysis tools. Ten volunteers completed a questionnaire on the acceptability of patient's speech. Maxillary dimensions and palatal volume were measured on dental casts before and after expansion using a digital gauge. Results: Voice analysis showed an increase in the peak frequency of fricative consonants (/s/,/ʃ/) after expansion, whereas there was no change of formant frequencies of palatal consonants (/ɲ/,/ʎ/). Vowel /i/ displayed a lowering of the first formant frequency, and an increase in the second and third formant frequencies. After bonding, Group B showed both a greater reduction in the peak frequency of fricatives and a greater increase in the formant frequencies of palatal consonants than Group A. Conclusion: Rapid maxillary expansion causes a slight phonetic change in the acoustical parameters of both consonants and vowels. The two-arm Hyrax caused less speech impairment than the four-arm Hyrax during the treatment. | |
| Digital Object Identifier (DOI): | 10.1111/ocr.12136 | |
| Handle: | http://hdl.handle.net/11392/2369869 | |
| Appare nelle tipologie: | 03.1 Articolo su rivista |
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