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Hydrostatic pulpal pressure effect upon microleakage
Howard W Roberts1, David H Pashley
181 DS/SGD, 606 Fisher Street, Keesler AFB, MS 39534, USA. howard.roberts@us.af.mil
Purpose:
To evaluate if hydrostatic pulpal pressure plays a role in reducing microleakage.
Methods:
Uniform Class 5 preparations were accomplished on human molars with one margin on root dentin. Prepared teeth were randomly placed in one of three groups: (1) Hydrostatic pressure simulation at 20 cm pulpal pressure; (2) Hydrostatic pressure simulation but no pressure applied (positive control); and (3) Conventional microleakage method. Specimens were subjected to 24 hours methylene blue dye, sectioned, and microleakage assessed as a function of microleakage length versus entire preparation wall length using a traveling microscope.
Results:
Hydrostatic pressure specimens demonstrated less gingival wall microleakage than the control groups while no difference was found between occlusal preparation walls.
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