The objective of the study is to evaluate and compare, clinically and radiographically,the effects of MTA and Biodentine when used as pulp dressings following pulpotomy in human primary molars.

Inclusion Criteria:

• molars showing:

  1. symptomless exposure of vital pulp by caries
  2. no clinical or radiographic evidence of pulp degeneration (excessive bleeding from the root canal, internal root resorption, inter-radicular and/or furcal bone destruction)
  3. the possibility of proper restoration of the teeth
  4. no physiological resorption of more than one-third of the root

Exclusion Criteria:

• presence of systemic pathology and any history of allergic reaction to latex, local anaesthetics or to the constituents of the test pulp dressing agents