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

Part of paid clinical trials in Houston, Texas.

Sponsor
The University of Texas Health Science Center, Houston
Study ID
NCT07491640
Status
Not Yet Recruiting

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Conditions

  • Assessment of Vertical Dimension Change

Eligibility Criteria

Sex
ALL
Age
21 Years - 90 Years
Healthy Volunteers
Not accepted

Interventions

  • Occlusal Vertical Dimension Modification (-4mm) — DEVICE
    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.
  • Occlusal Vertical Dimension Modification (-2 mm) — DEVICE
    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.
  • Occlusal Vertical Dimension Modification (0 mm) — DEVICE
    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.
  • Occlusal Vertical Dimension Modification (+2mm) — DEVICE
    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.
  • Occlusal Vertical Dimension Modification (+4mm) — DEVICE
    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.

Study Details

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.

Key Dates

Start date
Mar 30, 2026
Status verified
Mar 2026
Primary completion
Jun 19, 2026
Completion
Jun 30, 2026

Study Design

Enrollment
50 participants (estimated)
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER

Arms

  • Experimental: Occlusal Vertical Dimension Modification (-4mm)
  • Experimental: Occlusal Vertical Dimension Modification (-2 mm)
  • Experimental: Occlusal Vertical Dimension Modification (0 mm)
  • Experimental: Occlusal Vertical Dimension Modification (+2mm)
  • Experimental: Occlusal Vertical Dimension Modification (+4mm)

Primary Outcome Measure

Maxillary central incisor length [ Time Frame: From time of denture placement to about 24 hours after denture placement (depending on patient availibity) ]

Central Contacts

Locations (1)

FacilityCityStateZIPSite coordinators
The University of Texas Health Science Center at houstonHoustonTexas77030
Maria D Gonzalez, DDS,MS
[email protected]
(713) 486-4138
Chun-Yeh Chien
[email protected]
(713) 486-4274

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The University of Texas Health Science Center at houston· Houston, TX