It Can cause a thin area or perforation of the restoration borders.There is another type of Bevel called the Minnesota Bevel or the Reverse Bevel, this bevel as the name suggest is opposite to what the normal bevel is and it is mainly used to improve retention in any cavity preparation It is used only when capping cusps to protect and support them, opposite to an axial cavity wall, on the facial or lingual surface of the tooth, which will have a gingival inclination facially or lingually.Its use is avoided except in cases where it is impossible to use any other form of bevel. It is well reproduced by all four classes of cast alloys, internal resistance and retention features are lost in full bevel. ![]() Complete Enamel and Dentinal walls of the cavity wall or floor are included in this Bevel.Internal boxed- up resistance and retention features of the preparation are preserved with Long Bevel. Long Bevel is most frequently used bevel for the first 3 classes of Cast metals. Entire Enamel and 1/2 Dentin is included in the Bevel preparation. ![]() This bevel is used mostly with Class I alloys specially for type 1 and 2.
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