Complete denture insertion. Part 3: Causes and correction of occlusal disharmony

Causes of occlusal disharmony Errors in jaw relation Errors in mounting on articulator Errors in processing Difference of adaptation between trial & final denture base Dimensional changes of acrylic denture base material Changes in the supporting structures Correction of occlusal disharmony Intraoral adjustments: 1- Articulating paper: Disadv. (Tissue resilienncy – D. movement) Bilateral. 2- Occlusal indicator wax ( 2 strips of occlusal wax 6mm thick). 3- Central bearing device with articulating paper. 4- Abrasive paste (Shift – decrease V.D.O. – movement). Extraoral adjustments: 1- Laboratory remounting: restore centric occlusion – Perfect working& balancing occlusion (lateral balance) – establish protrusive balance. 2- Clinical remounting: - Mount upper denture: using plaster jig. - Mount lower denture: using centric inter-occlusal record.