Digitally programmed (CAD) offset values for prototyped occlusal splints (CAM): assessment of appliance-fitting using...

Area of Science:

• Dental Materials Science
• Digital Dentistry
• Biocompatible Resins

Background:

• Limited data exists on the fitting accuracy of prototyped occlusal appliances.
• Digital design and 3D printing offer potential for improved fabrication of dental splints.

Purpose of the Study:

• To evaluate the fitting properties of 3D-printed occlusal splints designed with varying digital offset values.
• To compare the fit of splints fabricated using two distinct biocompatible resins.

Main Methods:

• Occlusal splints were digitally designed with offset values ranging from 0.0 to 0.25 mm.
• Splints were 3D printed using two different biocompatible resins.
• Gap volume and surface deviation were quantified using 3D technology and impression material.

Main Results:

• A 0.20 mm offset value resulted in significantly smaller gap volumes and deviation compared to 0.15 mm and 0.25 mm offsets.
• Fit accuracy was consistent across both tested biocompatible resins for each offset value.
• No significant difference in gap volume or deviation was observed between the two resins for any given offset.

Conclusions:

• The 0.20 mm offset value is recommended for optimal digital design of occlusal appliances.
• This offset ensures superior fitting properties and accuracy in 3D-printed dental splints.
• Biocompatible resin choice does not significantly impact fit accuracy at the tested offset values.