Objectives: to evaluate the effect of  the horizontal and lateral condylar guidance measured by different methods of registration records on balanced occlusion  of complete denture.
Subjects and methods: Twelve completely edentulous patients were selected for this study,  with age ranging from 60-70 years old. Patients were carefully chosen from the outpatient clinics of the Removable Prosthodontics Department, Faculty of Dental Medicine for Girls, Al-Azhar University. All Twelve patients were involved in the study. Patients chosen were free from any temporomandibular disorders or systemic diseases. Twelve complete dentures were constructed according to bilateral  balanced occlusal concept and then duplicated for experimental work. Each patient received a complete denture. Only one duplicate denture used for measurement of the horizontal and lateral condylar guidance. Horizontal and lateral condylar guidance angles were measured using three different methods for each; The horizontal condylar guidance was measured using the protrusive interocclusal wax record method, Graphic tracing method and Cone Beam Computed Tomography CBCT scan method. The lateral condylar guidance was measured using Hanau equation calculated from protrusive interocclusal records method, Gothic arch tracing method and Cone beam computed tomography CBCTscan method. All records were transferred and the angles were adjusted on an Arcon semi-adjustable Bio-art articulators. Dentures were adjusted on articulator using clinical remounting to measure and achieve the balanced occlusion. The effect of each method on bilatral balanced occlusion were studied.
Results:The results of this study showed that there was no significant difference in bilateral balanced occlusion when using different condylar guidance registration records during construction of complete denture.
Conclusion: Within the limitation of this study, it can be concluded that, an Arcon semi-adjustable system with the wax protrusive record  and Hanau equation may be the most practical way to obtain the desired relative horizontal  and lateral condylar angle respectively.