Accuracy of Different Interocclusal Recording Methods

Background: In order to fabricate successful prostheses, it is necessary to reproduce the interocclusal relationship accurately and transfer it to the articulator. This study evaluates the accuracy of different bite registration methods by comparing them with a standard model. Methods: In this in vitro comparative analysis which was done in Duhok, Kurdistan Region, Iraq during 2023. Fully dentate upper and lower casts were mounted on an articulator. Different reference points were marked and the distances between upper and lower reference points with the occlusal plane angles were recorded using a measurement application. They were divided as anteroposterior left and right, buccolingual left and right, horizontal angles, and frontal angles. The lower second premolars and first molars were removed and the casts were duplicated and inter arch relations were transferred using dental wax, condensation silicone, additional silicone and the intra oral scanner. Each of the casts were specific to a single group with 10 samples each group. The measurements and angles were compared with the control group’s measurements. Results: The dental wax and the a-silicone showed significant recordable differences in anteroposterior and buccolingual, right and left (P<0.05). The condensation silicone was significantly different in anteroposterior right and buccolingual right (P<0.05) while the intraoral scanner was significantly different in anteroposterior and frontal readings (P<0.05). All the rest of the results provided no significantly recordable changes or differences(P>0.05). The intraoral scanner showed the least mean difference while group A showed the most. Conclusion: The results showed that all the mentioned methods had some discrepancies and differences. The intra oral scanner and the condensation silicone provided greater accuracy while the dental wax had the least.