[A discussion of jaws relation in complete denture restoration]

We studied jaws relation of 8 edentulous patients after complete denture restoration by using Digital Sirognathograph (D-SGG).The results indicated that the maximum intercuspation occlusion (i.e.CO or MCP) is not commonly coincident with the CRO,and the discrepancy is statistically significant.The CO is anterior to the CRO by 0.72+/-0.39mm,and it may vary significantly in different closures of the same patient. This implies that the termination of the occlusion with neuromusculature is not strictly precise and constant,but alters in a corresponding range.So,it seems reasonable to develop a "freedom of centric" in the range of 0.72+/-0.39mm anterior to the CRO.The physiological functional occlusion,therefore,is restricted to neither of the CO nor the CRO, but is guided between the two.