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Comparative study on long-term stability in mandibular sagittal split ramus osteotomy: hydroxyapatite/poly-l-lactide
Young-Wook Park1, Hyun-Sik Kang1, Jang-Ha Lee1
1Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, 7 Jukheon-Gil, Gangneung, Gangwondo 25457 South Korea.
Resorbable hydroxyapatite/poly-l-lactic acid (HA/PLLA) mesh provides superior long-term skeletal stability for mandibular sagittal split ramus osteotomy (SSRO) compared to titanium miniplates. This resorbable mesh ensures consistent mandible positioning post-surgery.
Area of Science:
- Orthognathic Surgery
- Biomaterials Science
- Skeletal Reconstruction
Background:
- Resorbable devices are increasingly used in orthognathic surgery, but concerns exist regarding their long-term skeletal stability.
- Osteofixation of mandibular sagittal split ramus osteotomy (SSRO) is a critical procedure where device choice impacts outcomes.
Purpose of the Study:
- To evaluate the long-term skeletal stability of unsintered hydroxyapatite/poly-l-lactic acid (HA/PLLA) mesh for SSRO fixation.
- To compare the stability of HA/PLLA mesh with traditional titanium miniplates.
Main Methods:
- A comparative study involving patients undergoing SSRO, divided into HA/PLLA mesh and titanium miniplate fixation groups.
- Lateral cephalograms were taken preoperatively and at 1 day, 6 months, and 2 years postoperatively to track mandibular position changes.
Main Results:
- The titanium miniplate group showed significant anterior displacement of Point B at 6 months and inferior displacement at 2 years postoperatively.
- The HA/PLLA mesh group exhibited no significant changes in Point B position throughout the 2-year follow-up period.
Conclusions:
- Un-sintered HA/PLLA mesh fixation offers superior long-term skeletal stability for SSRO compared to titanium miniplates.
- HA/PLLA mesh provides a stable osteofixation solution, maintaining mandibular position effectively over time.
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