<prompt> Which pattern of enamel etching results in formation of honey comb appearance?Type IType IIType IIIType IV  <response>: 3 types of patten given in Sturdevant Type 1 - dissolution of prism core-HONEY COMB APPEARANCE. Type II dissolution of prism periphery COBBLESTONE APPEARANCE. Type III - less distinct pattern, mixture of 1 and 2. Silverstone gave 5 types. Type IV - pitted enamel as well as structures that look like unfinished puzzle,maps or network. Type V - flat smooth surface. 