Related Experiment Videos
Endodontic dowel retention with resinous cements.
1University of California-Los Angeles, School of Dentistry, Center for the Health Sciences.
The Journal of Prosthetic Dentistry
|December 1, 1992
Summary
This study evaluated composite resin cements for endodontic dowel retention. A system with dentinal adhesive and smear layer removal demonstrated superior retention strength, supporting passive cementation effectiveness.
Area of Science:
- Dental Materials Science
- Endodontics
- Biomaterials Engineering
Background:
- Endodontic dowel retention is crucial for restoring function.
- Composite resin cements offer potential for effective dowel cementation.
- Smear layer removal is a key step in endodontic procedures.
Purpose of the Study:
- To compare the retention capabilities of three composite resin cement systems for endodontic dowels.
- To evaluate the influence of smear layer removal and dentinal adhesives on dowel stability.
Main Methods:
- Three distinct composite resin cement systems were tested.
- All systems involved smear layer removal from the endodontic canal dentin.
- Load-to-dislodgement tests were performed to measure retention strength (DaN).
Main Results:
- One system using methyl ethyl ketone for drying showed poor retention (5.4 DaN).
- A system with only smear layer removal exhibited moderate retention (54.7 DaN).
- The system combining dentinal adhesive and smear layer removal achieved the highest retention (77.4 DaN).
Conclusions:
- The combination of a surface-initiated dentinal adhesive and smear layer removal significantly enhances endodontic dowel retention.
- Passive cementation of dowels with composite resin can be as effective as active seating methods.
- Material selection and surface preparation critically impact the success of endodontic dowel restorations.