Scholarlink

Background <p>Post-ankylotic facial asymmetry often requires staged surgical correction, frequently involving distraction osteogenesis and orthognathic procedures. Conventional planning methods may require multiple stereolithographic (STL) models or rely on virtual planning systems that may not always be accessible due to financial or technical constraints.</p> Technique <p> This technical note describes a cost-effective technique using a single stereolithographic (STL) model across two surgical stages to correct unilateral post-ankylotic facial asymmetry. A patient underwent Le Fort I osteotomy and left horizontal mandibular ramus osteotomy with vertical distraction osteogenesis, achieving approximately 17 mm ramal lengthening confirmed on immediate orthopantomogram. After a consolidation period of three months, CBCT confirmed stable ramal height gain without relapse. Instead of fabricating a second STL model, the same polylactic acid (PLA) model was reused and modified to simulate post-distraction anatomy. Red carding wax was used to fill the distracted gap, and the model was further employed to simulate genioplasty with midline correction, enabling fabrication of a custom splint.</p> Results <p>The modified STL model enabled accurate skeletal simulation and facilitated surgical planning for the subsequent procedure while minimizing cost and resource use.</p> Conclusion <p>Although limited to hard-tissue prediction, this technique proved effective for staged decision-making, splint fabrication, and patient education. It offers a practical alternative to multi-model workflows, particularly in resource-constrained settings, and highlights the evolving role of STL-based planning in delivering efficient, personalized maxillofacial care.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Stereolithographic Model Guided Simulation for Two-Stage Correction of Post-ankylotic Facial Asymmetry

  • 期刊论文

  • 发表日期：

    2026年3月16日

查看全文
  • Sameer Pandey,
  • Prajesh Dubey,
  • Vipul Jain

摘要

Background

Post-ankylotic facial asymmetry often requires staged surgical correction, frequently involving distraction osteogenesis and orthognathic procedures. Conventional planning methods may require multiple stereolithographic (STL) models or rely on virtual planning systems that may not always be accessible due to financial or technical constraints.

Technique

This technical note describes a cost-effective technique using a single stereolithographic (STL) model across two surgical stages to correct unilateral post-ankylotic facial asymmetry. A patient underwent Le Fort I osteotomy and left horizontal mandibular ramus osteotomy with vertical distraction osteogenesis, achieving approximately 17 mm ramal lengthening confirmed on immediate orthopantomogram. After a consolidation period of three months, CBCT confirmed stable ramal height gain without relapse. Instead of fabricating a second STL model, the same polylactic acid (PLA) model was reused and modified to simulate post-distraction anatomy. Red carding wax was used to fill the distracted gap, and the model was further employed to simulate genioplasty with midline correction, enabling fabrication of a custom splint.

Results

The modified STL model enabled accurate skeletal simulation and facilitated surgical planning for the subsequent procedure while minimizing cost and resource use.

Conclusion

Although limited to hard-tissue prediction, this technique proved effective for staged decision-making, splint fabrication, and patient education. It offers a practical alternative to multi-model workflows, particularly in resource-constrained settings, and highlights the evolving role of STL-based planning in delivering efficient, personalized maxillofacial care.