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A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
Published on: September 21, 2017
[How effective is asymmetrical headgear in practical use?]
A Wichelhaus1, F G Sander, E Inglezos
1Poliklinik für Kieferorthopädie, Universitätsklinikum Ulm.
Summary
The asymmetrical face bow with an internal hinge effectively treats dental asymmetries in patients. This adaptable orthodontic appliance simplifies adjustments and ensures successful outcomes in various treatment scenarios.
Area of Science:
- Orthodontics
- Dental Mechanics
- Craniofacial Orthopedics
Background:
- Asymmetrical facial structures present significant challenges in orthodontic treatment.
- Traditional orthodontic appliances may require complex modifications or multiple components to address dental asymmetries.
- The need for adaptable and efficient appliances for treating midface and dental asymmetries is well-established.
Purpose of the Study:
- To evaluate the efficacy and versatility of an asymmetrical face bow with an internal hinge in orthodontic treatment.
- To demonstrate the appliance's utility as a standalone or adjunctive device for correcting asymmetries.
- To highlight the advantages of the internal hinge design for simplifying treatment adjustments and monitoring.
Main Methods:
- The asymmetrical face bow with an internal hinge was applied to all examined patients.
- The appliance was utilized individually, with removable appliances, and in conjunction with fixed appliance techniques.
- Modifications such as hinge addition, arm shortening, and use of palatal archwires were employed as needed.
Main Results:
- The asymmetrical face bow with internal hinge demonstrated successful treatment outcomes in all patients.
- The appliance allowed for easy intra-oral adjustments during check-ups without replacing bands or using new devices.
- A low incidence of crossbite (4%) was noted on the distally treated side, suggesting careful force management.
Conclusions:
- The asymmetrical face bow with an internal hinge is a highly effective and adaptable appliance for treating dental and facial asymmetries.
- Its design facilitates simplified adjustments, anchorage control, and monitoring of asymmetrical forces.
- The appliance's successful application warrants its consideration as a standard tool in clinical orthodontic practice.

