Abstract
Objective: The aim of study is to evaluate premature contacts and occlusal forces for each tooth in complete dentures before occlusal adjustment. Material and methods: The study population was comprised of 30 subjects (aged 50 - 75). The measurements were performed using the T-Scan. The occlusion was analyzed before and after frames which from the T-scan “Force Movies” are Centric Relation bite recordings. Several practices closures were made until a repeatable pattern of contacts was seen on the video monitor and sensor was calibrated. Each subject was asked to bite on the sensor in a position of maximum intercuspation thus obtaining the location of each tooth contact. Premature contacts and percentage distribution of forces per tooth were obtained before and after occlusal adjustment. Results: The worst occlusal balance was recorded in a patient (F/74) by occlusal force values at right 5.9% and left 94.1% before occlusal adjustment. After occlusal adjustment, all patients’ percentage of occlusal balance values was adjusted at average of 48.8%, left 51.1%. The percentage distribution of forces per tooth results showed that premature contacts had been observed at posterior teeth either right or left side of occlusion. Conclusions: Occlusal adjustment is requested for all complete dentures to prevent patients from muscular pain and/or temporomandibular disorders for further terms.
Highlights
For the successful prosthetic treatment of edentulous patients, correct occlusal relationships are important
The worst occlusal balance was recorded in a patient (F/74) by occlusal force values at right 5.9% and left 94.1% before occlusal adjustment
The concept of bilaterally balanced occlusion, established by Gysi who helped for the progress of scientific knowledge on occlusion, is a completely balanced occlusion which was created in order to stabilize complete dentures [3]
Summary
For the successful prosthetic treatment of edentulous patients, correct occlusal relationships are important. Many various factors can cause some problems related to the occlusal relationships of teeth on complete dentures. Unstable trial bases for the interarch relationship record, incorrect use of facebow, transfer of casts on an articulator, inaccurately established vertical and horizontal dimensions, irregular arrangement of posterior teeth, excessive use of pressure during pressing of the acrylic resin into the flask, inadequately closed flask during polymerization, and overheating of the finished dentures during final polishing, can be counted as those factors [1]. In the evaluation of occlusal relationships, both qualitative and quantitative methods are preferred to be used [7]. The quantitative method of evaluating occlusal relationships such as Photo-occlusion and T-Scan system (Tekscan Inc., South Boston, MA, USA) provides the differentiation of the sequence and density of the con-
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