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Anterior maxillary advancement using tooth-supported distraction osteogenesis
Summary
Maxillary advancement in dogs using a tooth-supported device showed greater dental movement than skeletal movement. Skeletal fixation may be necessary for effective maxillary advancement with such devices.
Area of Science:
- Orthodontics and Maxillofacial Surgery
- Biomaterials and Tissue Engineering
Background:
- Distraction osteogenesis is a method for bone and tissue expansion.
- Advancing the anterior maxilla is a common orthodontic procedure.
Purpose of the Study:
- To evaluate the efficacy of a tooth-supported distraction device for anterior maxillary advancement in dogs.
- To compare dental and skeletal movements during maxillary distraction.
Main Methods:
- An anterior maxillary osteotomy was performed on dogs.
- A tooth-supported distraction device was used, activated 0.5 mm every 12 hours for 10 days.
- Serial tooth and radiographic measurements were taken.
Main Results:
- Average tooth advancement was 8.4 mm and skeletal advancement was 4.0 mm after 10 days.
- At 6 months, average tooth advancement was 5.0 mm, with bone healing observed in all animals.
- Dental movement significantly exceeded skeletal movement.
Conclusions:
- Tooth-borne maxillary distraction devices result in greater dental movement compared to skeletal movement.
- Skeletal fixation might be required for optimal maxillary advancement appliances.