Dynamic Effect of Occlusal Vertical Dimension on Lower Facial Form and Lip Positions
The University of Texas Health Science Center, Houston
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.
Eligibility
- Age range
- 21–90 years
- Sex
- All
- Healthy volunteers
- No
Inclusion Criteria: -Complete edentulous with complete dentures or overdentures Exclusion Criteria: * Gross facial asymmetry * A history of surgery in the facial area * A history of neurologic disorders * Ill-fitting dentures * Dentures with inaccurate occlusal vertical dimension (OVD) * Inability or unwillingness to smile * Allergy to nitrile, vinyl polysiloxane (VPS) material or photopolymer resins. * Presence of facial hair that would interfere with marking reference points on the face * Severe class II or class III malocclusion
Interventions
- DeviceOcclusal 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.
- DeviceOcclusal 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.
- DeviceOcclusal 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.
Location
- The University of Texas Health Science Center at houstonHouston, Texas