Minicavities were prepared in 26 caries-free teeth. Cavity preparation and the finishing of the occlusal area and the gingival floor was done with diamond burs (diameter 1 mm, grain sizes 90 μm and 15 μm, respectively). For the finishing of the axial box margin and the proximo-cervicaI curved border, a new set was developed: It is composed of an EVA-system with the total amplitude reduced to 0.34 mm, and a highly flexible file (Cavishape, grain 15 μm). The shape of this file had to be modified in order to follow the proximo-cervical curvature. The efficiency of the new device was compared with the axial margin trimmer by means of scanning electron microscopy and a score system.
The new device allowed a significantly better finishing of the proximo-cervical curvature and of the axial box margin.
Lussi, A.; Gygax, M; Hotz, P.; and Lüthi, D.
"A New Method for Finishing Minicavities,"
Scanning Microscopy: Vol. 2
, Article 31.
Available at: https://digitalcommons.usu.edu/microscopy/vol2/iss3/31