Method Of Occlusion Adjustment And Its Effect On Occlusion And Muscles Of Mastication In Patient With Implant Restoration

Objective:Study and compare different occlusion adjustment techniques in patients with dental implant restoration and observing adjustment effects on occlusion, muscles of mastication, and its clinical applications.Method:Using our dental implantation center's initial clinical application forms to select 20 appropriate patients that with 56Ankylos implants, each with a single edentulous posterior dentition with no distal dentition. These selected patients were further divided into two groups. Group "A" used the original occlusion adjustment technique and group "B" used the occlusal plane reduction technique. Implant body manufactured by Ankylos was implanted in the edentulous space in each patient and restored with fix prosthodontics single unit crown. Occlusion was adjusted in each restoration accordingly. Electromyograms were conducted to determine adjustment technique's effect on occlusion and muscles of mastication three months and six months after initial restoration and adjustment.From the experiments, the following data were collected and measurements for balanced occlusal measuring standards are obtained:Central occlusion force (COF), Asymmetry index of molar occlusal force (AMOF). Balanced muscles of mastication measuring standards also obtained are:measurements from electromyogram for the muscles of mastication and the anterior bundle of the temporalis muscle at the mandibular rest position. Average electromyogram measurements of the anterior bundle of the Temporalis muscle at the intercuspal position (ICP). Astot, Masseter Muscle Asymmetry Index, and Anterior Temporalis Asymmetry index (ASTA). Data were collected and each measurement and index was compared from each experimental group 3 months and 6 months after initial occlusion adjustment.Results:(1)3 months after occlusion adjustment the original occlusion adjustment technique side of group "A" compared with used the occlusal plane reduction technique of group "B" were statistically differents (P<0.05) in balanced occlusal measuring standards and balanced muscles of mastication measuring standards.(2)After 3-6 months occlusion adjustment the original occlusion adjustment technique side of group "A" compared with used the occlusal plane reduction technique of group "B" was statistically differents (P<0.05) in balanced muscles of mastication measuring standards,but was no statistically differents in balanced occlusal measuring standards (P>0.05)(3)After 6 months restoration the original occlusion adjustment technique side of group "A" was statistically differents (P<0.05) in balanced muscles of mastication measuring standards,but was no statistically differents in balanced occlusal measuring standards (P>0.05). the occlusal plane reduction technique of group "B" was statistically differents (P<0.05) in balanced occlusal measuring standards and balanced muscles of mastication measuring standards.Conclusion:Using occlusion plane reduction adjustment technique, it is possible to obtain occlusion index and muscles of mastication's electromyogram index similar to the opposite side's natural dentition in patients with single unit fix prosthodontics crown with single posterior edentulous dentition without distal dentitions. Using occlusal plane reduction technique can facilitate and improve interactions between muscles of mastication to approach a near normal condition similar to the natural dentition on the opposite side.