Effect of dental wear, stabilization appliance and anterior tooth reconstruction on mandibular movements during speech.
This study described changes in mandibular movements during pronunciation of /m/ and /s/ sounds in Portuguese, in patients presenting dental wear before and after appliance insertion and tooth reconstruction. Subjects were divided into a control group of dentate patients and an experimental group of patients with incisal tooth wear due to bruxism. A magnetic jaw tracking device measured the jaw opening, and translations to left and right sides of the mandible during pronunciation of phonemes. Evaluations were carried out 1 week and immediately before appliance insertion; 24 h, 7, 30 and 60 days after appliance insertion; and 1 week and 1 month after tooth reconstruction. Data were submitted to two-way ANOVA, Mann-Whitney and Friedman tests (p<0.05). Jaw opening was different (p<0.05) for both sounds in all periods. The anteroposterior amplitude for /s/ showed differences immediately before and 1 month after appliance insertion (p<0.05). Lateral amplitude for the right side showed differences between groups after appliance insertion for /s/, and 1 and 2 months after appliance insertion for the /m/ (p<0.05). Volunteers with anterior tooth wear had a wider opening movement, and the movements during speech of /m/ and /s/ sounds were not changed after appliance insertion and reconstruction of teeth.
Serrano
Priscila de Oliveira
Pde O
Department of Prosthodontics and Periodontology, Dental School of Piracicaba, State University of Campinas, Piracicaba, SP, Brazil.
Faot
Fernanda
F
Del Bel Cury
Altair Antoninha
AA
Rodrigues Garcia
Renata Cunha Matheus
RC
D000134:Acid Etching, Dental; D000293:Adolescent; D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002012:Bruxism / Q000150:complications / Q000503:physiopathology; D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000473:pathology; D007802:Language; D008297:Male; D008334:Mandible / Q000503:physiopathology*; D008875:Middle Aged; D009068:Movement; D017090:Occlusal Splints; D010700:Phonetics; D013060:Speech / Q000502:physiology*; D014072:Tooth Abrasion / Q000503:physiopathology* / Q000628:therapy; D055815:Young Adult
C084111:Charisma composite resin; D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate