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A comparative study on anterior teeth retraction-related hard and soft tissue changes with physiologic anchorage
Jianqiao Yuan1,2, Zimeng Zhuang1, Longlong Niu1,3
1Department of Orthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center for Oral Biomaterials and Digital Medical Devices, Beijing, 100081, China.
Physiologic anchorage control (PASS) effectively retracts anterior teeth and improves facial profiles without needing extra devices like TADs. This technique offers a viable alternative for orthodontic treatment, reducing reliance on temporary anchorage devices.
Area of Science:
- Orthodontics
- Dentofacial Orthopedics
- Cephalometric Analysis
Background:
- Protrusive teeth and associated facial profile issues are common orthodontic concerns.
- Effective anterior teeth retraction is crucial for achieving optimal occlusion and esthetics.
- Anchorage control techniques significantly influence treatment outcomes in orthodontics.
Purpose of the Study:
- To compare the efficacy of physiologic anchorage control (PASS) versus self-ligation with TADs for anterior teeth retraction.
- To evaluate hard and soft tissue changes associated with these techniques.
- To assess the potential of PASS to reduce the need for temporary anchorage devices (TADs).
Main Methods:
- A comparative cross-sectional study involving 68 Class I or II orthodontic patients requiring four-premolar extraction.
- Two groups were formed: PASS group (n=34) and Damon group (n=34) utilizing self-ligation with TADs.
- Pre- and post-treatment cephalograms were analyzed for 26 skeletal, dental, and soft tissue variables.
Main Results:
- Both groups showed significant anterior teeth retraction and profile improvement (P<0.05).
- The PASS group demonstrated statistically significant differences in skeletal (∠ANB, Wits value) and soft tissue (UL-E) changes compared to the Damon group.
- PASS technique resulted in greater improvements in FCA and Z angle compared to the Damon group.
Conclusions:
- Physiologic anchorage control (PASS) is effective for anterior teeth retraction and profile enhancement without additional anchorage devices.
- The PASS technique can reduce the dependence on temporary anchorage devices (TADs) in orthodontic treatment.
- PASS offers a valuable alternative for managing protrusive teeth and achieving favorable skeletal and soft tissue changes.
