Dental General 5d71d1dc The distance b/w apical extent of calculus and alveolar crest in human periodontal pockets is most constant, having a mean length of? A 1.97 mm ±33.16% B 2.97 mm ±33.16% C 1.67 mm ±33.16% D 1.67 mm ±33.16% High-Yield Explanation No explanation provided.