• Endochondral: the condyle blastema, attached to the upper part of pterygoid muscle, grows backward and upward and concurrent endochondral ossification resulted in the formation of the condyle.
  • Intramembranous: flat bones of head, maxilla, mandible

 

  • The basic growth pattern of the mandibular body and condyle appeared in week 7 of fertilization. Histologically, the embryonal mandible originated from primary intramembranous ossification in the fibrous mesenchymal tissue around the Meckel cartilage. From this initial ossification, the ramifying trabecular bones developed forward, backward and upward, to form the symphysis, mandibular body, and coronoid process, respectively.