Speech changes
Conditions
Interventions
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,
Device
Sponsors
Faculdade de Odontologia de Bauru - USP
Diego Coelho Lorenzoni
Eligibility
Age
19 Years to 41 Years
Inclusion 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
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.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 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
| Measure | Time frame |
|---|---|
| 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. | — |
Countries
Brazil
Contacts
Public ContactDiego Lorenzoni
Diego Coelho Lorenzoni
Outcome results
None listed