NCT07491640

Dynamic Effect of Occlusal Vertical Dimension on Lower Facial Form and Lip Positions

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 50 (estimated)
• Sponsor: The University of Texas Health Science Center, Houston · Academic / Other
• Sex: All
• Age: 21 Years – 90 Years
• Healthy volunteers: Not accepted

Summary

The purpose of this study is to evaluate the effect of increased/decreased occlusal vertical dimension (OVD) on lower facial form and lip position, to analyze variations across gender groups and to analyze variations across age groups.

Conditions

• Assessment of Vertical Dimension Change

Interventions

Type	Name	Description
DEVICE	Occlusal Vertical Dimension Modification (-4mm)	Participants will undergo fabrication and placement of removable bite splints designed to alter occlusal vertical dimension (OVD). On each side, four discrete reference points will be marked at the lowest point of the orbital margin and the highest point of the external auditory meatus using Whip-Mix reference plane marker.The subject's head position will be leveled with EZ bow laser level device and -4mm OVD color coded bite splints will be randomly placed in position. An image with desktop facial scanner will be taken.
DEVICE	Occlusal Vertical Dimension Modification (-2 mm)	Participants will undergo fabrication and placement of removable bite splints designed to alter occlusal vertical dimension (OVD). On each side, four discrete reference points will be marked at the lowest point of the orbital margin and the highest point of the external auditory meatus using Whip-Mix reference plane marker.The subject's head position will be leveled with EZ bow laser level device and -2mm OVD color coded bite splints will be randomly placed in position. An image with desktop facial scanner will be taken.
DEVICE	Occlusal Vertical Dimension Modification (0 mm)	Participants will undergo fabrication and placement of removable bite splints designed to alter occlusal vertical dimension (OVD). On each side, four discrete reference points will be marked at the lowest point of the orbital margin and the highest point of the external auditory meatus using Whip-Mix reference plane marker.The subject's head position will be leveled with EZ bow laser level device and 0mm OVD color coded bite splints will be randomly placed in position. An image with desktop facial scanner will be taken.
DEVICE	Occlusal Vertical Dimension Modification (+2mm)	Participants will undergo fabrication and placement of removable bite splints designed to alter occlusal vertical dimension (OVD). On each side, four discrete reference points will be marked at the lowest point of the orbital margin and the highest point of the external auditory meatus using Whip-Mix reference plane marker.The subject's head position will be leveled with EZ bow laser level device and +2mm OVD color coded bite splints will be randomly placed in position. An image with desktop facial scanner will be taken.
DEVICE	Occlusal Vertical Dimension Modification (+4mm)	Participants will undergo fabrication and placement of removable bite splints designed to alter occlusal vertical dimension (OVD). On each side, four discrete reference points will be marked at the lowest point of the orbital margin and the highest point of the external auditory meatus using Whip-Mix reference plane marker.The subject's head position will be leveled with EZ bow laser level device and +4mm OVD color coded bite splints will be randomly placed in position. An image with desktop facial scanner will be taken.

Timeline

• Start date: 2026-03-30
• Primary completion: 2026-06-19
• Completion: 2026-06-30
• First posted: 2026-03-24
• Last updated: 2026-03-24

Locations

1 site across 1 country: United States

Regulatory

• FDA-regulated device study