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Remaining tooth structure associated with various preparation designs for the endodontically treated maxillary second
Liang Lin Seow1, Chooi Gait Toh, Nairn H E Wilson
1Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia. seowll@um.edu.my
Summary
Restoring endodontically treated teeth requires careful consideration of remaining tooth structure. This study quanties tooth tissue loss from various preparations for maxillary second premolars, aiding restoration decisions.
Area of Science:
- Restorative Dentistry
- Endodontics
- Dental Materials
Background:
- The amount of remaining tooth structure is crucial for the fracture resistance of restored endodontically treated teeth.
- Maxillary second premolars are commonly endodontically treated and restored.
Purpose of the Study:
- To quantify the amount of tooth structure remaining after various preparations for restoring endodontically treated maxillary second premolars.
- To compare tooth structure preservation across different restorative approaches.
Main Methods:
- Illustrations of maxillary second premolars were created in multiple sections.
- Various intra- and extracoronal preparation designs were superimposed onto the illustrations.
- Tooth tissue remaining was measured for each preparation type.
Main Results:
- Ceramic inlay, inlay with palatal cusp coverage, and onlay preparations preserved 2.0-2.5mm of tooth structure buccally and palatally.
- Metal-ceramic crown preparations left approximately 1.0mm buccally and 1.6-1.8mm palatally.
- All-ceramic crown preparations resulted in 1.0-1.2mm of remaining tooth structure around the access cavity.
Conclusions:
- The choice of definitive restoration for endodontically treated maxillary second premolars should consider the amount of tooth tissue remaining after preparation.
- Different preparation designs significantly impact tooth structure preservation.