Evaluation of Dimensional Changes of 3D Printed Models After Sterilization: A Pilot Study

Area of Science:

• Additive Manufacturing
• Biomaterials Engineering
• Medical Device Sterilization

Background:

• 3D printing is increasingly used for clinical dental objects.
• Sterilization is crucial for patient safety and device efficacy.
• Common sterilization methods may impact the integrity of 3D printed materials.

Purpose of the Study:

• To evaluate the effects of steam heat and gas plasma sterilization on 3D printed clinical dental objects.
• To assess volumetric and morphological changes post-sterilization.

Main Methods:

• Three types of 3D printed objects (tooth replica, orthognathic splint, surgical cutting guide) were tested.
• Objects underwent steam heat or gas plasma sterilization.
• High-resolution CBCT scanning compared pre- and post-sterilization morphology and volume.

Main Results:

• No significant volumetric changes were observed after either sterilization method.
• Morphological deformation occurred in orthognathic splints post-sterilization.
• Heat sterilization resulted in more pronounced deformation than gas plasma.

Conclusions:

• Sterilization of 3D printed dental objects can induce deformation, especially with heat sterilization.
• The findings suggest potential limitations for using heat-sterilized 3D printed dental devices in clinical settings.
• Further investigation is required to validate these results and explore alternative sterilization techniques.