Assessment of Vertical Dimension Change
Conditions
Brief 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.
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.
DEVICEOcclusal 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.
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.
Sponsors
The University of Texas Health Science Center, Houston
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER
Masking
SINGLE (Outcomes Assessor)
Intervention model description
All participants will get all 5 sizes of splints and the order of receipt of each size will be randomized
Eligibility
Sex/Gender
ALL
Age
21 Years to 90 Years
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
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Maxillary central incisor length | From time of denture placement to about 24 hours after denture placement (depending on patient availibity) |
| Interlabial gap height | From time of denture placement to about 24 hours after denture placement (depending on patient availability) |
| Intercommisural width | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Distance from Maxillary incisal edge to upper lip in millimeters | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Distance from Maxillary incisal edge to lower lip in millimeters | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Upper lip length | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Upper lip vermilion height | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Lower lip vermilion height | denture placement to about 24 hours after denture placement (depending on patient availability) |
| The upper lip margin on the central incisor to the gingival margin of maxillary central incisor | denture placement to about 24 hours after denture placement (depending on patient availability) |
| The lower lip margin on the central incisor to the gingival margin of mandibular central incisor | denture placement to about 24 hours after denture placement (depending on patient availability) |
Secondary
| Measure | Time frame |
|---|---|
| Maxillary central incisor length | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Interlabial gap height | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Intercommisural width | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Maxillary incisal edge to upper lip | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Maxillary incisal edge to lower lip | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Upper lip length | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Upper lip vermilion height | denture placement to about 24 hours after denture placement (depending on patient availability) |
| Lower lip vermilion height | denture placement to about 24 hours after denture placement (depending on patient availability) |
| The upper lip margin on the central incisor to the gingival margin of maxillary central incisor | denture placement to about 24 hours after denture placement (depending on patient availability) |
| The lower lip margin on the central incisor to the gingival margin of mandibular central incisor | denture placement to about 24 hours after denture placement (depending on patient availability) |
Countries
United States
Contacts
PRINCIPAL_INVESTIGATORMaria D Gonzalez, DDS, MS
The University of Texas Health Science Center, Houston
Outcome results
None listed