Relationship of head posture and the rest position of the mandible.

Eight subjects were evaluated to assess the relationship between VDR and head posture. Photographic evaluation of head position and VDR was performed initially to quantify a baseline recording. All subjects were then given 4 weeks of physical therapy to improve head posture. Photographs were remade after 2 and 4 weeks of therapy. An increase in the VDR and in the angle of the head to the cervical vertebra was noted in all patients. Although further study is indicated to confirm the findings of this pilot study, it appears that the VDR is influenced by head position. This finding should be considered when prosthodontic problems are treated.