Speech changes produced by upper orthodontic retainers

• Register: REBEC
• Last refreshed on: 29 May 2023
• Main ID: RBR-2v3k6r
• Date of registration: 29/01/2016
• Prospective Registration: No
• Primary sponsor: Faculdade de Odontologia de Bauru - USP
• Public title: Speech changes produced by upper orthodontic retainers
• Scientific title: Speech changes produced by upper orthodontic retainers: Prospective Randomized Clinical Trial
• Date of first enrolment: 20/07/2015
• Recruitment status: Recruitment completed
• URL: http://ensaiosclinicos.gov.br/rg/RBR-2v3k6r
• Study type: Intervention
• Study design: A treatment clinical trial, crossover, with four arms, single-blinded, randomized and prospective
• Phase: N/A

Countries of recruitment

Brazil

Contacts

• Name: Diego Coelho Lorenzoni
• Affiliation: Diego Coelho Lorenzoni

• Name: Diego Coelho Lorenzoni
• Affiliation: Diego Coelho Lorenzoni

Key inclusion & exclusion criteria

Inclusion criteria: Brazilians who speak the native Portuguese; acceptable sagittal occlusal relationship, with molars class I or variations of up to ¼ of II or III class.

Exclusion criteria: Presence of cross bite, open bite, overbite greater than 50%, overjet greater than 4 mm, crowding greater than 2 mm and multiple anterior diastema; orthodontic treatment recently finalized (less than 1 year); recently used upper orthodontic retainer (less than 2 months); presence of ankyloglossia; presence of TMD; presence of previous change in speech.


Age minimum: 19Y
Age maximum: 41Y
Gender: -

Health Condition(s) or Problem(s) studied

Speech changes; orthodontic retainer, malocclusion

C07.793.494

C23.550.291.937

E06.658.578

Intervention(s)

E05.320.274

Device

This study will have a crossover design. Control group: Group I - 20 adult volunteers will use the upper conventional wrap-around orthodontic retainer during 21 days; Experimental Groups: Group II - the same 20 adult volunteers will use the upper horseshoe-shaped wrap-around orthodontic retainer during 21 days; Group III - the same 20 adult volunteers will use the upper wrap-around with an anterior hole orthodontic retainer during 21 days; Group IV - the same 20 adult volunteers will use the upper thermoplastic clear retainer during 21 days. After use each appliance for 21 days, volunteer will remain seven days without using any device, until start the next retainer. Changes caused by each appliance and comparisons of these changes between the different retainers will be made with the acoustic analysis of speech formants in Praat 5404 computerized program, and the auditory perceptual analysis of speech carried out by two speech therapists, in speech excerpts recorded in three times: immediately before and after each retainers installation and after 21 days of use thereof. To investigate the perception of volunteers about the appliances, a visual analog scale of 100 mm will be applied to each feature assessed after each retainer be used.

Primary Outcome(s)

Changes in speech caused by different upper removable orthodontic retainers at the time of installation and after 21 days of device use, checked by acoustic analysis of formants and auditory perceptual analysis of speech, and will be considered a variation of 5% the measurements pre, post and immediately after 21 days of installation of the devices.

Secondary Outcome(s)

Differences in perception of patients to several factors during 21 days of upper orthodontic retainers use, assessed by a visual analog scale of 100 mm, and will be considered a difference of 5% between devices.

Source(s) of Monetary Support

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES

Faculdade de Odontologia de Bauru - USP

Secondary Sponsor(s)

Diego Coelho Lorenzoni