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Root positioning and leakage to dye in extracted teeth using reduced pressure
A Katz1, R Rosenwasser, A Tamse
1Department of Endodontology, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Israel.
International Endodontic Journal
|November 21, 1998
Summary
Tooth root apex position significantly impacts dye leakage in vitro. Upright root apices showed the most leakage, while horizontal positioning minimized dye penetration, highlighting the need for standardized methods in leakage studies.
Area of Science:
- Endodontics
- Dental Materials Science
Background:
- Root canal sealers are crucial for preventing bacterial microleakage.
- Understanding factors influencing sealer penetration is vital for endodontic treatment success.
Purpose of the Study:
- To investigate the effect of root apex position on dye leakage in vitro.
- To evaluate the influence of reduced pressure on dye penetration.
Main Methods:
- 132 extracted single-rooted teeth were prepared using the step-back technique.
- Teeth were sealed with cold lateral condensation using gutta-percha without sealer.
- Teeth were divided into four groups based on apex position (upright vs. horizontal) and pressure conditions (reduced vs. passive immersion).
Main Results:
- No significant difference in leakage was observed between horizontally positioned groups under reduced pressure and passive immersion (P < 0.813).
- Upright root apices exhibited significantly greater mean linear leakage (0.51 mm) compared to horizontally positioned groups (0.21 mm and 0.19 mm) (P < 0.024).
- Horizontal root positioning resulted in minimal dye penetration.
Conclusions:
- Tooth root apex position significantly affects linear dye penetration in vitro.
- Reduced pressure alone did not significantly increase leakage in horizontally positioned teeth.
- Standardization of factors like tooth positioning is essential for reliable leakage studies in endodontics.