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: The C-factor is the ratio of bonded to unbonded (free) surfaces in a composite restoration. A Class I cavity has 5 bonded surfaces (pulpal, buccal, lingual, mesial, distal) and only 1 unbonded surface (occlusal), resulting in a C-factor of 5. High C-factors increase polymerization shrinkage stress on the cavity walls. Question 2: Correct Answer is C (Gamma-2 phase) Explanation : The Gamma-2 phase ( operative+dentistry+mcqs+pdf+new
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