Registration Accuracy between Maxillary and Mandibular Teeth for Fixed Restoration Construction

Objectives: This study was carried out to evaluate the dimensional accuracy of conventional bite registration material and CAD/CAM bite registration material in patients with a single missing tooth.

Method: Twenty patients with one missing tooth (who needed a fixed partial denture) were selected and included in the present study. A full veneered preparation was done. The patient bit on bite registration material in centric and eccentric movement. A wire “3 cm in length “was bonded with composite on adjacent teeth to the preparation. The length of wire impression on bite registration material was measured and after 24 hours to evaluate the possible effect with time factor.

Results: The effect of duration on the dimensional accuracy of bite registration materials at horizontal centricand eccentric occlusion was statistical significant between immediate and later who recorded higher values with both types of bite registration materials tested. Also a statistical significant differences between the two types of occlusion irrespective to the duration, type of restorations and types bite registration materials, as eccentric occlusion recorded higher values.

Conclusions: Futar D and Futar scan bite registration materials provided accurate records with no differences between them. Dimensional accuracy was influenced by time factor of the recording materials.