ephalometric chụp X quang mang lại kiến thức cơ bản về ĐÃ morphogenesis sọ mặt và dẫn đến sự phát triển của khái niệm phát triển sọ mặt (ví dụ như lý thuyết ma trận chức năng Moss ', lý thuyết đối ứng của Enlow, kiến trúc của sọ mặt Delaire phân tích). Các khoản tiền rất lớn của các cephalometric có Been thu dữ liệu, | 3-D Cephalometry and Craniofacial Growth CHAPTER 8 Cephalometric radiography has yielded fundamental knowledge on craniofacial morphogenesis and led to the development of craniofacial growth concepts . Moss functional matrix theory Enlow s counterpart theory Delaire s architectural craniofacial analysis . Huge amounts of cephalometric data have been collected and cephalometric reference data have been developed by different research groups . Bolton standards of dentofacial developmental growth cephalometric standards by Riolo and co-workers . Craniofacial growth and development is a composite result of different fundamental growth processes that take place simultaneously in different regional developmental fields. Each of these has its proper amount and direction of growth which determine its growth vector. According to Enlow s counterpart theory three principal craniofacial growing parts exist each having its proper development timing although they are all interrelated the neurocranium brain and basicranium cranial base the airway and the oral region. The vis-cerocranium the face develops in phylogenetic association with the neurocranium with the basicranium as a template in between. Craniofacial growth and development of the visce-rocranium and neurocranium are based on two different processes of skeletal movement that are interrelated and occur simultaneously displacement and remodelling. Primary displacement involves a bony displacement away from the other skeletal parts triggered by the traction forces of the expanding functional soft tissue matrix the so-called carry effect in order to create space for enlargement and relocation of bones. During primary displacement the moving bone and other skeletal parts are growing simultaneously while in secondary displacement the displacement of a bone is not directly related to its own enlargement. Remodelling is a different process that takes place through patterns of deposition and resorption in an opposite .
