Plate hook for joining bones and position impactor used for the same
PURPOSE: To completely stabilize a vertebra and a piece of the vertebra, and to obtain the high rigidity in a longitudinal direction even though the high stress is applied to the vertebra positioned on this part of the vertebra. CONSTITUTION: A plate comprising a through hole 13 for a fixing tool, and plural stylus projections 12, is installed, and the through holes 13 are formed as the slots having a major side in a longitudinal direction of the plate 11, at the both edges of the plate 11. The stylus projections 12 respectively comprising an ahchor tooth 121 is installed near the through holes 13. The plate 11 comprises a hole 14 for fixing the position impactor at an almost central port of the same.
This study was focussed on the effects of changes in interocclusal clearance on the activity of oral muscles. Two types of occlusal splints were incorporated in 20 subjects without TMJ-syndrome. Their muscle reactions were recorded electromyographically in the masseter muscle. The results show 5 groups of muscle reaction correlated with the mean postural face height. The changed height of the postural position has a significant influence on the control pattern of the masticatory system.