Cervical Description Lesions in this category are generally more difficult of access or more complex to repair than the Size 2. This means that the majority will be root surface lesions in interproximal areas. These are often difficult to identify in the first place but as they tend to progress rapidly early diagnosis is important. A tunnel type approach is generally required taking care not to damage the gingival tissues. Develop a clean margin around the full circumference but leave demineralised dentine on the axial wall because the pulp is close by. Glass ionomer is the material of choice for restoration because of the difficulty of developing adhesion to the dentine margin using composite resin. Click on images to view full size. figure1 The Site 3 lesion is generally an interproximal root surface lesion regardless of size. This is because of the difficulty of access and restoration. This lesion is essentially root surface caries because it is not related to the contact area and there is obviously sound enamel occlusal to the lesion. figure2 Cavity preparation is complete and the full circumference of the walls are now clean dentine. The axial wall remains as demineralised affected dentine because of proximity to the pulp chamber. The cavity is now being conditioned with 10% polyacrylic acid for 10 seconds only. figure3 A short length of mylar strip has been placed between the teeth to act as a matrix and this has been supported with a wooden wedge. figure4 A resin modified glass-ionomer was used for the restoration and this is now being light activated from the lingual to make sure of full activation. figure5 The completed restoration immediately after removal of the rubber dam. Note the satisfactory aesthetic result.

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