Clear aligners have greater impact on speech than fixed appliances

Written By : Dr. Shravani Dali |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2023-02-12T20:00:24+05:30 | Updated On 13 Feb 2023 2:31 PM IST

Clear aligners have greater impact on speech than fixed appliances suggests a new study published in the Orthodontics & Craniofacial Research

A study was conducted to compare the immediate three-dimensional (3D) perioral soft-tissue changes and impact on speech induced by clear aligners and fixed appliances.

In this repeated-measure experimental study, stereophotogrammetric 3D photographs of 40 participants were recorded before and immediately after the introduction of clear aligners and fixed appliances. The 3D surface meshes were registered to quantify changes in the direction and magnitude of nine soft tissue landmarks located on the upper and lower lips. Self-reported speech disturbance was evaluated using a questionnaire. Data were analysed using repeated-measures analysis of variance.

Results

• In the vertical plane, the clear aligners induced inferior displacement (range 0.4-1.5 mm) for all nine landmarks (P < .01), whereas fixed appliances induced inferior displacement only of A-point (0.4 ± 0.9 mm), right crista philtri (0.5 ± 1.1 mm) and left crista philtri (0.7 ± 1.1 mm).

• The clear aligners induced greater vertical changes than fixed appliances for all landmarks (P < .05). In the sagittal plane, both clear aligners and fixed appliances slightly advanced all perioral landmarks, except subnasale.

• Fixed appliances caused greater changes than clear aligners for right cheilion (+0.8 mm), left cheilion (+0.8 mm) and labrale inferius (+0.9 mm) (P < .01).

• Both orthodontic appliances had a significant self-perceived effect on speech, with clear aligners affecting speech to a greater degree.

Clear aligners and fixed appliances produced immediate effects on perioral soft tissues, which are most evident in the vertical plane for clear aligners, and in the sagittal plane for fixed appliances. Speech was affected by both appliances.

Reference:

Wang, D, Firth, F, Bennani, F, Farella, M, Mei, L. Immediate effect of clear aligners and fixed appliances on perioral soft tissues and speech. Orthod Craniofac Res. 2022; 00: 1- 8. doi:10.1111/ocr.12625

Keywords:

Wang, D, Firth, F, Bennani, F, Farella, M, Mei, L, Orthodontics & Craniofacial Research, soft tissues, speech, clear aligners, fixed appliances, perioral

Clear alignersspeechfixed appliancesOrthodontics & Craniofacial Research

Source : Orthodontics & Craniofacial Research

Dr. Shravani Dali

Dr. Shravani Dali has completed her BDS from Pravara institute of medical sciences, loni. Following which she extensively worked in the healthcare sector for 2+ years. She has been actively involved in writing blogs in field of health and wellness. Currently she is pursuing her Masters of public health-health administration from Tata institute of social sciences. She can be contacted at editorial@medicaldialogues.in.

Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751