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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
Published on: February 10, 2014
15.6K
Integrating skeletal anchorage into fixed and aligner biomechanics
W Eugene Roberts1, Chris H Chang2, Jie Chen3
1Professor Emeritus of Orthodontics and Mechanical Engineering, Indiana University and Purdue University, Indianapolis, Indiana.
Journal of the World Federation of Orthodontists
|June 17, 2022
Summary
Orthodontic alignment using temporary skeletal anchorage devices offers determinate mechanics for complex cases. This approach corrects severe skeletal dysplasia, including Class III open bite malocclusion, without extractions or surgery.
Area of Science:
- Orthodontics
- Dental Mechanics
- Skeletal Anchorage
Background:
- Traditional orthodontic alignment with fixed appliances and aligners relies on indeterminate mechanics, depending on material properties and patient compliance.
- Stabilized dental segments and arches can be treated with determinate mechanics, akin to moving multirooted teeth.
Purpose of the Study:
- To introduce and evaluate the application of extra-alveolar temporary skeletal anchorage devices (e.g., buccal shelf, infrazygomatic crest screws) for determinate orthodontic mechanics.
- To demonstrate the efficacy of these devices in correcting severe skeletal dysplasia and Class III open bite malocclusion.
Main Methods:
- Utilized extra-alveolar bone screws placed in the basilar bone (mandibular buccal shelf and infrazygomatic crest) as anchorage points.
- Employed determinate mechanics for the retraction and rotation of the lower arch to address skeletal dysplasia and malocclusion.
Main Results:
- Extra-alveolar anchorage provides determinate mechanics for moving teeth, segments, and entire arches.
- Successful correction of severe skeletal dysplasia and Class III open bite malocclusion was achieved through lower arch retraction and rotation.
Conclusions:
- Extra-alveolar temporary skeletal anchorage devices enable determinate mechanics in orthodontics, advancing beyond traditional indeterminate methods.
- This technique offers a viable alternative for correcting complex malocclusions like Class III open bite, avoiding extractions and orthognathic surgery.
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