Junji talks through his experiences of pre- Skeletal Anchorage Systems (SAS) / bone plates and what has changed with SAS focusing on class 3 cases
- Without Skeletal anchorage
- Camouflage: Required extractions
- Use of MEAW for control – technically challenging
- Pre surgical preparation: Time consuming
- SAS for camouflage lower arch distalisation
- SAS positioned buccal to lower molars.
- Indirect ligation to premolar with ligature
- Distalisation with pushcoil from premolar to molar
- SAS for camouflage upper arch protraction
- SAS ‘I’ design (2 eyelets) positioned upper arch premolar region
- Indirect ligation to molar with ligature
- Mesialisation with pushcoil from molar to premolar
- SAS for upper molar distalisation
- SAS ‘Y’ design positioned on zygomatric buttress
- Indirect ligation canine with ligature
- Distalisation with pushcoil from canine to molar
- SAS for surgery first
- Placed same time as orthognathic surgery
- Class 3 case, allows for distalisation post op – to decompensate upper incisors as described previously
- Predictable final position of upper incisors
- Treatment time less than 1 year
References
- Sugawara, J., Daimaruya, T., Umemori, M., Nagasaka, H., Takahashi, I., Kawamura, H. and Mitani, H., 2004. Distal movement of mandibular molars in adult patients with the skeletal anchorage system. American journal of orthodontics and dentofacial orthopedics, 125(2), pp.130-138.
