Horizontal Morphological Linear Skeletal Distance Measurement Method in Predicting the Occlusal Vertical Dimensions in Edentulous Patients- A Clinical Radio-Morphometric Study

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Saurabh Chaturvedi et al.

Abstract

Background- Various methods have been proposed to determine the vertical dimension of occlusion (VDO) but still today, there is no general or scientific agreement for it in completely edentulous patients.


Purpose- The purpose of this study was to Assess the efficacy of the newer linear skeletal distance measurement method [between nasion (Na) to sella (Se)] in predicting the vertical dimension of occlusion in edentulous patients.


Material and methods- Out of 120 patients, 90 (51 (51 males and 39 females) were considered. For each patient complete denture was fabricated and Avr-VDO was calculated by taking average of the values of VDO obtained by three pre-established methods - Physiologic rest position method, Swallowing method, Closest speaking space method. At first recall visit lateral cephalograms were taken with dentures inside the mouth. The linear skeletal distance between the Na and Se and vertical distance between ANS to Me were measured and correlated with Avr—VDO in lateral cepholographs. Unpaired and paired- t tests along with Pearson correlation coefficient & linear regression analysis was used for statistical analysis with p-value as significant when less than 0.05.


Results- The average distance from Na-Se for males was 66.70±6.46 and for females was 62.05±6.39 which was higher than the average distance between the ANS-Me and Avr-VDO for both genders. The results revealed statistically significant differences between Na-Se & ANS-Me; Na-Se &Avr-VDO and significant positive correlation between the measured parameters for the whole sample and also in both males and females.


Conclusions- The distance measured from Na to Se in a cephalometric radiograph is significantly correlated with the distance from the anterior nasal spine to the Me and occlusal vertical dimension determined clinically in both genders in studied population. This distance can be used as a helpful and reliable landmark to determine the OVD during complete denture fabrication.

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