Detalhes bibliográficos
| Ano de defesa: |
2017 |
| Autor(a) principal: |
Silva, Lorrany Cândido da
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| Orientador(a): |
Leles, Cláudio Rodrigues
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| Banca de defesa: |
Leles, Claúdio Rodrigues,
Torres, Érica Miranda de,
Marra, Juliê |
| Tipo de documento: |
Dissertação
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| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
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| Programa de Pós-Graduação: |
Programa de Pós-graduação em Odontologia (FO)
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| Departamento: |
Faculdade de Odontologia - FO (RG)
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| País: |
Brasil
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| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/7196
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Resumo: |
Objective: To test the validity and reliability of a method to measure the masticatory performance of complete denture wearers employing a two-colour gum mixing ability test through visual and opto-electronical analysis. Material and Methods: A sample of 75 subjects was selected from patients who received new conventional tissue-supported complete dentures in a clinic at the Federal University of Goiás. Masticatory tests were performed using a two-colour chewing gum that was masticated for 5, 10, 20, 30 and 50 chewing cycles, performed in a random order. The mixing level of the two colours of the chewed gum was assessed visually by two independent raters based on a 5-point ordinal scale. Then, the specimens were flattened into a 1 mm width wafer, scanned and saved as a two-sided digital image. Each pair of images was submitted to a colourimetric analysis using a custom-made software (ViewGum©, Dhal Software, Greece). The circular variance of hue (VOH) was used as a measure of the level of the colour mixture. The lower is the VOH, the greater is the mixture and, consequently, the masticatory performance. In the current study design, a varying number of chewing cycles simulated different levels of masticatory performance in one subject. The intra and inter-examiner agreement for the visual analysis was measured by the intraclass correlation coefficient and the weighted Kappa. The reliability of VOH analysis was assessed using the Bland-Altman plots. Results: Overall inter and intra-rater agreement in visual analysis was 64% and 68%, respectively (almost 99% of scores ranged within ±1 point). Overall weighted kappa was >0.80 and intraclass correlation coefficient was 0.91. A proportional increase in the level of mixture occurred with increased number of chewing cycles for both the visual and colourimetric analysis (p<0.001). Similarly, VOH and the visual 12 analysis were highly correlated (r= -0.89; p<0.001). Bland-Altman plots revealed excellent agreement and extremely low systematic error between duplicated VOH measures. Conclusion: The two-colour chewing gum test is a valid and reliable method for assessment of the masticatory performance in complete denture wearers using both the visual and electronic colourimetric analysis. |
