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Autotransplanted premolars with incomplete root formation in a growing patient with multiple missing teeth
Toshi Miyai1, Jaehee Cho2, Kiyoshi Tai3
1Private Practice, Tokyo, Japan.
Summary
Autotransplantation of developing premolars successfully corrected a Class II malocclusion in an 8-year-old boy. This orthodontic treatment resulted in a stable, normal occlusion and improved facial profile after 25 months.
Area of Science:
- Dentistry
- Orthodontics
- Oral Surgery
Background:
- Skeletal Class II malocclusion often presents with missing teeth, requiring complex treatment.
- Autotransplantation is a viable option for replacing missing teeth, especially in growing patients.
- Temporary skeletal anchorage devices (TSADs) enhance orthodontic movement control.
Observation:
- An 8-year-old boy with a skeletal Class II pattern had four missing mandibular teeth.
- Developing maxillary premolars were autotransplanted to the mandibular arch.
- Treatment utilized temporary skeletal anchorage devices for precise tooth movement.
Findings:
- The patient achieved a normal occlusion and improved facial profile after 25 months of active treatment.
- Autotransplanted premolars were stable and functional 12 months post-treatment.
- The combined approach of autotransplantation and TSADs proved effective.
Implications:
- Autotransplantation of developing teeth is a predictable treatment for severe dental anomalies.
- This technique offers a biological and potentially cost-effective solution for malocclusions.
- Further research can explore long-term outcomes and broader applications of this combined approach.

