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Bond Strength of Reline Materials to 3D-Printed Provisional Crown Resins
Jorge Palavicini1, Sherrod L Quin2, Wael Zakkour3
1Department of Prosthodontics, Louisiana State University Health Science Center, School of Dentistry, New Orleans, LA 70119, USA.
Polymers
|September 28, 2023
Summary
The bond strength of 3D-printed provisional crown resins was evaluated with different reline materials. PMMA reline material demonstrated clinically acceptable bond strength for both tested 3D-printed resins.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- 3D-printed resins are emerging for provisional dental restorations.
- Evaluating the bond strength of these novel materials with conventional reline agents is crucial for clinical application.
Purpose of the Study:
- To compare the shear bond strength (SBS) between two 3D-printed resins (Envision Tech, NextDent C&B) and three reline materials (composite resin, Bis-acryl, PMMA).
- To assess the bond durability of 3D-printed provisional crown materials.
Main Methods:
- Two 3D-printed resins and one conventional PMMA were used.
- Specimens were bonded with composite resin, Bis-acryl, or PMMA reline materials.
- Shear bond strength (SBS) testing and light microscopy for failure analysis were performed.
Main Results:
- The highest SBS was observed when PMMA reline material was used with both 3D-printed resins.
- Bond strength was significantly lower with Bis-acrylic or composite resin relines compared to PMMA (p < 0.05).
- No significant difference in bond strength was found between 3D-printed resins and the PMMA control when using PMMA reline material (p > 0.05).
Conclusions:
- The tested 3D-printed resins exhibit clinically acceptable bond strength when relined with PMMA.
- PMMA appears to be a suitable reline material for these 3D-printed provisional crown resins.
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