# Crown Height Space (CHS) for implant dentistry is measured from:
a) prosthetic platform
b) crest of the bone
c) junctional epithelium
d) gingival margin
The correct answer is B. Crest of the bone.
Crown Height Space(CHS) is measured from crest of bone to the plane of occlusion in posterior region and incisal edge of arch in anterior region.
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