Track 6. Technological innovations in biomedical training and practice Authors: Fernando Blaya Haro, José María de Agustín del Burgo, Roberto D'Amato, Manuel Islan, Enrique Soriano Heras and Jesus Manuel Garcia Alonso

1. Monitoring of the additive manufacturing process for the use of
biomaterials in medical field
Salamanca (ES) October22-26, 2018

2. 1. PURPOSES
• Monitoring the manufacturing process
• Evaluate disturbances
• Use biocompatible materials in medical products
• Evaluate the viability of the obtained product
• Generate reports for the 3D manufacturing process

3. 2. 3D FDM PROCESS
• Production through the depositionof fused material

4. • Geometrical Parameters of the material used (Diameter)
• Extrusion speed
• Humidity
• Temperature
• Vibrations
3. DISTURBANCES DURING THE PROCESS
These disturbances affect the final quality of the product.
In the case of biocompatible materials, they also affect their
characteristics

5. 4. DISTURBANCES DURING THE PROCESS
• Parameters of the material used

6. 5. DISTURBANCES DURING THE PROCESS
• Extrusion speed: Volumes deposited in 10 mm of spool advance

7. 6. DISTURBANCES DURING THE PROCESS
HUMIDITY
– Density of the material can change (PLA is )
– The materials change their properties
• PLA-more breakable
• PVA can even melt

8. TEMPERATURE
• Extruder and chamber temperature
– Correct adhesion
– The materials change their properties
Selected
temperatur
7. DISTURBANCES DURING THE PROCESS

9. 8. ANALYSIS OF THE DISTURBANCES
Humidity
(%)
Chamber
temperature
(ºC)
Extruder
Temperature
(ºC)
Filament
Diameter
(mm)
Nominal Not controlled Not controlled 220 1,75
Average 31,64 25,56 218,28 1,78
Maximum 33,00 34,67 227,20 1,96
Minimum 31,00 19,04 213,53 1,61

10. 9. DISTURBANCES DURING THE PROCESS
• Result: from 9% to 63% of error

11. 10. IMPORTANCE OF CONTROLLING DISTURBANCES
• In the case of manufacturing by 3D printing bio-ceramic joint implants, it has to
be performed at low and controlled temperature
• The control of environmental conditions for 3d printing is of fundamental
importance to controlthe quality of the product
• Specially in biomedical applications
• In many cases strict control of the temperature or humidity in the printing
chamberis needed

12. 11. CONCLUSIONS
• Necessity to generate a report of each product to know the conditions in
which it has been manufactured
• There are different disturbances in 3D FDM process that interfere in the
quality and characteristics of the final product
• These disturbances could degrade bio materials
• It is necessary to control the parameters of the process to validate the final
product

13. THANKS FOR YOUR ATTENTION
Salamanca (ES) October 22-26, 2018 13