DENT3060 Lecture Notes - Lecture 17: Endochondral Ossification, Ossification, Skeleton
Document Summary
2nd dentition: second dentition related terms, adaptive (dentoalveolar) changes to accommodate. Secretion of extracellular material: >size independent of no. /size of cells. Most instances cartilage, esp. that involved in growth, behaves like soft tissue. Features: all possible on surface of mineralised tissue, not within mass. Features: growth of facial soft tissue does not parallel growth of underlying hard tissue, soft tissue changes with age. When mineralisation takes place & hard tissue formed, interstitial growth becomes impossible. Initially formed in cartilage, later transformed to bone via endochondral ossification: growth at sutures & surface remodelling then become more important. Orthodontic importance: cephalometric trace/analysis: cranial base as stable reference, observe max/mand growth, evaluate treatment effect. Forward/down direction, driven by growth of cranial base behind & growth of sutures. After age 7, maxilla moves forward driven by suture growth. As maxilla push forward/down, anterior surface tends to resorb (important aging feature) Body of mandible grows longer by periosteal apposition.