Related Experiment Video
Updated: Oct 30, 2025

3D Planning and Printing of Patient Specific Implants for Reconstruction of Bony Defects
Published on: August 4, 2020
Customized Cost-Effective Polymethyl-Methacrylate Cranioplasty Implant Using Three-Dimensional Printer.
Sambardhan Dabadi1, Raju Raj Dhungel1, Upama Sharma2
1Department of Biomedical Engineering, Annapurna Neurological Institute and Allied Sciences, Maitighar, Kathmandu, Nepal.
This study explores the use of 3D printing to create customized polymethyl-methacrylate (PMMA) implants for skull reconstruction. The goal is to provide a cost-effective and efficient alternative to traditional materials used in cranioplasty. The researchers present three cases where PMMA implants were manually sculpted using a 3D printer. The implants were tailored to fit each patient's unique skull shape. The results suggest that this method may reduce both the cost and complexity of the procedure compared to conventional techniques. The study highlights the potential of 3D printing in neurosurgery and emphasizes the importance of sharing both the successes and challenges encountered during the process.
Area of Science:
- Neurosurgery materials research
- Medical device fabrication
- Cost-effective implant development
Background:
Current cranioplasty techniques rely on synthetic materials that, while effective in restoring calvarial shape, often come with high costs and complex surgical procedures. Prior research has shown that polymethyl-methacrylate (PMMA) has been historically used as a bone substitute due to its favorable properties. However, the economic burden and procedural complexity remain unresolved challenges in the field. This gap motivated the exploration of alternative methods that maintain efficacy while reducing cost and intraoperative demands. The need for a more accessible and efficient solution has driven recent innovations in implant fabrication. Customization and cost reduction are key areas where further research is needed. No prior work had resolved how 3D printing could be integrated with PMMA for cranioplasty. The potential of 3D printing to streamline implant production has not been fully realized in clinical practice.
Purpose Of The Study:
The aim of this study is to demonstrate the feasibility of using a 3D printer to create customized PMMA implants for calvarial defects. The specific problem addressed is the high cost and procedural complexity of traditional cranioplasty materials. The motivation stems from the need to provide an affordable and efficient alternative for patients requiring skull reconstruction. By leveraging 3D printing technology, the study seeks to simplify the implant fabrication process. The focus is on reducing both financial and surgical burdens for patients. The study also aims to highlight the potential of PMMA as a cost-effective bone substitute. Sharing the challenges encountered during the process is a central goal. The findings may suggest new directions for implant development in neurosurgery.
Main Methods:
The researchers used a 3D printer to fabricate customized PMMA implants for three patients with calvarial defects. The process involved manual sculpting of the implants based on individual anatomical needs. The implants were designed to match the specific calvarial shape of each patient. The 3D printing method allowed for precise customization of each implant. The study did not employ automated or robotic sculpting techniques. Instead, it relied on manual adjustments during the printing process. The implants were fabricated using PMMA, a material known for its desirable properties in bone substitution. The study focused on the practical application of 3D printing in a clinical setting. The researchers documented both the success and challenges of the method.
Main Results:
The study successfully produced three customized PMMA implants using a 3D printer. Each implant was manually sculpted to fit the patient's calvarial defect. The results suggest that 3D printing can be a viable method for creating customized implants. The implants were fabricated at a lower cost compared to traditional methods. The process required less intraoperative time and complexity. The study found that PMMA implants provided satisfactory shape restoration in all three cases. The researchers observed that the 3D printing method simplified the fabrication process. The findings may indicate that 3D-printed PMMA implants are a practical alternative to conventional materials.
Conclusions:
The authors propose that 3D printing can be used to create customized PMMA implants for calvarial defects. The study suggests that this method is both cost-effective and practical. The findings may indicate that 3D-printed PMMA implants can serve as a viable bone substitute. The authors highlight the potential of this approach to reduce surgical complexity. The study does not claim that PMMA is the only suitable material for cranioplasty. The results may suggest that 3D printing can be integrated into clinical practice. The authors emphasize the importance of sharing both achievements and challenges. The study does not assert that this method is superior to all existing techniques.
Frequently Asked Questions
The main outcome is the successful creation of customized, cost-effective implants that restore calvarial shape with reduced intraoperative complexity.
The PMMA material is used in conjunction with 3D printing to create customized implants, which may reduce cost and surgical time compared to conventional methods.
Manual sculpting was chosen to allow precise customization based on individual patient anatomy during the 3D printing process.
The 3D printer is used to fabricate customized PMMA implants that match the calvarial shape of each patient.
The study observed that the implants provided satisfactory shape restoration in three patients with calvarial defects.
The authors suggest that 3D-printed PMMA implants may be a cost-effective and practical alternative to traditional cranioplasty materials.

