Novel Device for Measuring Vertical Maxillomandibular Registration

Abstract

Purpose : This article introduces the use of a measurement device that was recently developed.
Materials and Methods : This device was designed so that it can estimate changes in occlusal vertical dimension more precisely to measure the distance between the subnasal and the gnathion. It has several indicators and two scales. When positioned correctly, this device can measure, for example, the distance between the subnasal and gnathion on a patient or the distance of the interalveolar crest of the ridge of dentures. The authors performed an experiment using this measuring device to determine vertical dimension. Resin plates were used to raise the bite in a patient's mouth. The changes in the jaw position were measured by 11 clinicians using the device, and the measurements were statistically analyzed.
Results : The results of the experiment confirmed that the device is stable. There was no correlation between the number of clinical years of experience of the clinicians and the distance measured from the subnasal to the gnathion of the subject.
Conclusion : Stable measurements can be achieved with this measurement device.