Читать книгу Basic Guide to Oral Health Education and Promotion - Alison Chapman - Страница 23

By week 7, bone develops, outlining the body of the mandible.

As the bone grows backwards two secondary cartilages develop; these eventually become the condyle and coronoid processes.

As the bone grows forward, the two sides are separated by a cartilage called the mandibular symphysis. The two sides will finally fuse into one bone approximately 2 years after birth.

Figure 1.6 Cleft lip and palate in a six‐month‐old baby.

Source: Dreamstime.com/Pattarawit Chompipat | ID 84347343. Reproduced with permission of Dreamstime.com.

Upward growth of bone begins along the mandibular arch forming the alveolar process, which will go on to surround the developing tooth germs.