Affecting upper extremity strength by changing maxillo-mandibular vertical dimension in deep bite subjects.

Area of Science:

• Dental Science
• Kinesiology
• Biomechanics

Background:

• The vertical dimension of occlusion (VDO) is a critical factor in oral function.
• Previous research suggests a link between VDO and overall body strength.
• Individuals with deep overbite may present unique biomechanical responses.

Purpose of the Study:

• To investigate the effect of VDO manipulation on isometric deltoid strength (IDS) in subjects with deep overbite.
• To determine if altering VDO can maximize upper extremity muscle activation.

Main Methods:

• Sixteen female dental students with deep overbite participated.
• Isometric deltoid strength was measured using a hand-held strain gauge under four conditions: habitual occlusion, mandibular rest position, bite elevating appliance, and placebo appliance.
• Each subject served as their own control.

Main Results:

• Isometric deltoid strength was significantly lower in habitual occlusion compared to the mandibular rest position.
• Using a bite elevating appliance to optimize VDO significantly increased IDS compared to both habitual occlusion and rest position.
• No significant difference in IDS was found between habitual occlusion and the placebo appliance.

Conclusions:

• Changes in the vertical dimension of occlusion demonstrably affect isometric strength in the upper extremities.
• Optimizing VDO may be a viable strategy for enhancing muscle strength in specific populations.
• Further research is warranted to explore the clinical implications of VDO on neuromuscular performance.