Determination of Jaw Vertical Position Using Siverman and Moryia’s Phonetic Method on Dentistry
Determination of Jaw Vertical Position Using Siverman and Moryia’s Phonetic Method on Dentistry
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DOI: https://doi.org/10.22533/at.ed.159572521011
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Palavras-chave: Dimensão Vertical, Teste Fonético, Dimensão Vertical de Oclusão, Dimensão Vertical de Repouso.
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Keywords: Vertical Dimension, Phonetic test, Occlusion Vertical Dimension, Rest Vertical Dimension.
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Abstract: Introdution: this study had the purpose in determining the jaw vertical position of dentate patients. The vertical dimension study has been done for several years but, nowadays it has been a challenge to dentistry. The subjects were 17 dentate individuals attending the occlusion clinic of the dentistry course at the Universidade do Vale do Itajaí, Santa Catarina Brazil. Materials and Methods: the survey was conducted with dentistry students of both sexes between 18 to 25 years old with full dental arch. Two dots were done on gingival margin of premolars, one in maxilla and the other one in the jaw in both sides. The subjects’ Occlusion Vertical Dimension (OVD) was measured in both sides with the teeth in maximum intercuspation using a dry point compass. With the jaw interference guide (JIG) in position, the subject was asked to pronounce the “S” sound several times. After obtaining a tangent contact of the lower incisors on the JIG ridge, measures were done between the two points and transferred to a ruler to be transformed into millimeters. To the Moryia’s method, the jaw ridge was raised with resin of a different color for a better visualization and the phonetic test done again but now using continuously pronounced vowel sounds. The distance between the two marked starting points, were measured again and transformed into millimeters. Results: to the Silverman test the space between maxilla and jaw at the right and left side varied from 1.0 mm to 3.0mm during the phonetic tests getting an average of 1.97mm for both sides. The standard deviation to the right side was 0.59mm and 0.51mm to the left side. When a 95% confidence interval is established the accepted values for the right side are from 1.68% to 2.25% and from 1.72mm to 2.21mm to the left side. The data for each subject evaluated are described in table 1. For the Moriya’s test the average value to the right side was 3.38mm and 3.15mm to the left side with a standard deviation of 0.80 to the right side and 0.89 for the left one. For the same confidence interval of 95% the accepted values are from 2.30mm to 3.76mm (right side) and 2.72mm a 3.58mm (left side). Conclusion: within the limitations of this study, it was concluded that for the Silverman phonetic test the average distance for both sides (right and left) were of 1.97mm and the standard deviation of 0.59 (right side) and 0.51 (left side). For Moryia’s test the average distance for the right side were of 3.38mm and to the left were of 3.15mm, with standard deviation of 0.80 (right side) and 0.89 (left side). This is why the authors show the importance of phonetic tests to analyze and determining the Vertical Dimension on oral rehabilitation.
- Betsy Kilian Martins Luiz
- Lethicia Kilian Martins Luiz
- Casimiro Manoel Martins Filho