Surgery Gap healing, a type of primary healing having gap of 0.8 mm is healed as: A Direct lamellar bone formation. B Woven bone formation replaced by lamellar bone. C Woven bone formation only. D Any of the above. 💡 Explanation Gap healing, a type of primary healing having gap of 0.8 mm is healed as: ✓ Correct Answer: B. Woven bone formation replaced by lamellar bone.