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.
Department of Prosthodontics and Periodontology, Dental School of Piracicaba, State University of Campinas, Piracicaba, SP, Brazil.
Priscila de Oliveira
Pde O
Serrano
Fernanda
F
Faot
Altair Antoninha
AA
Del Bel Cury
Renata Cunha Matheus
RC
Rodrigues Garcia
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