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3D Planning and Printing of Patient Specific Implants for Reconstruction of Bony Defects
Published on: August 4, 2020
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Rapid prototyped patient specific guiding implants in critical mandibular reconstruction
Patricia Stoor1, Anni Suomalainen2, Karri Mesimäki1
1Department of Oral and Maxillofacial Surgery, Helsinki University Central Hospital, Helsinki, Finland.
Summary
Patient-specific implants (PSI) offer a promising solution for reconstructing large mandible defects after tumor resection. This method aids in restoring jaw function and aesthetics, potentially reducing complications associated with traditional methods.
Area of Science:
- Oral and Maxillofacial Surgery
- Biomaterials Engineering
- Medical Device Design
Background:
- Large mandible defects from tumors necessitate immediate reconstruction for functional and aesthetic restoration.
- Traditional reconstruction methods can involve donor site morbidity and lengthy procedures.
Purpose of the Study:
- To evaluate the efficacy and outcomes of immediate mandible reconstruction using patient-specific implants (PSI).
- To assess the feasibility of using computer-aided design and rapid prototyping for creating PSI for mandibular defects.
Main Methods:
- Prospective study involving 14 patients with large mandible tumors requiring continuity resection.
- Utilized 15 computer-aided design (CAD) and rapid prototyped patient-specific implants (PSI) for reconstruction.
- PSI scaffolds were filled with beta-tricalcium phosphate granules and autologous bone; microvascular reconstruction was performed in 12 cases.
Main Results:
- Uneventful healing occurred in nine out of 15 cases.
- Complications included one microvascular flap loss, one revision for mucosal perforation, and four major complications (mucosal perforation leading to infection and PSI removal).
- Average clinical follow-up was 33 months, and radiological follow-up was 21 months.
Conclusions:
- Patient-specific implants (PSI) represent a promising approach for large mandible reconstructions post-resection.
- Benefits include potentially fewer donor site complications and a more precise, expedited surgical process.
