NEET PG DENTAL EXAM

Detailed explanation-1: -The direct conversion of mesenchymal tissue into bone is called intramembranous ossification. This process occurs primarily in the bones of the skull. In other cases, the mesenchymal cells differentiate into cartilage, and this cartilage is later replaced by bone.

Detailed explanation-2: -In endochondral bones, ossification occurs within the cartilaginous template and also within the surrounding fibroblastic perichondral sheath to form the bone collar. Intramembranous bones develop via direct osteoblast differentiation within the mesenchyme.

Detailed explanation-3: -Intramembranous ossification occurs in the early embryo to create flat bones such as the skull and clavicle. Endochondral ossification forms ossified tissue to replace areas of cartilage. This occurs in the long bones as well as other irregular bones.