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Pit and Fissure – Moderate lesion

Description
This tooth was restored some years ago before the high strength auto cure glass-ionomers were available so a relatively low strength Type II.1 restorative aesthetic material was placed and then laminated to reinforce it. When cavity preparation commenced it was not realised that the lesion was so extensive so there is no photograph available.

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figure1
The fissure in the first molar was sufficiently complex to require attention. Following the original opening there proved to be an extensive lesion under the lingual fissure so the cavity outline was modified and extended in the region of the lesion only. The remaining fissures were explored conservatively to make sure there was no other large extension. The fissures on the second molar were similarly explored but that proved to be a Site 1, Size 1 lesion only.
Click on the image to see a larger versionfigure2 The walls of the extensive lesion were cleaned but the floor was left with softened demineralised dentine to avoid a possible pulp exposure. Both the cavities are now being conditioned with 10% PAA for 10 seconds only.
Click on the image to see a larger versionfigure3 The entire cavities in both teeth were restored with a Type II.1 restorative aesthetic glass-ionomer, immediately sealed and allowed to mature.
Click on the image to see a larger versionfigure4 It was decided that the occlusal load was too great for that type of GIC so subsequently it was laminated for strength. The glass-ionomer was cut back to a depth of about 2mm., the GIC and the surrounding tooth structure was etched, washed and dried. Note that the fissures remain sealed with glass-ionomer alone.
Click on the image to see a larger versionfigure5 The cavity was now restored incrementally with composite resin. Note that the second molar was restored with the glass-ionomer alone.

 

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Copyright © 2003 Graham J Mount