Reduced nasal breathing can influence the growth and development of facial structures. It may have many causes, and enlarged adenoid is the most frequent one. To investigate the effects of adenoids to jaw growth, we must first understand the normal growth of adenoids and jaws, and the relationship between size of adenoids and the values for the jaw variables. The purpose of this study is to present a more objective standard of nasopharyngeal size and jaw dimension at each bone age, by using Cervical Vertebrae Maturation Index(CVMI) of Hassel, from normal occlusion children aged 6 to 17. The results of this study suggests as follows: 1. At same bone age, female's chronologic age was about 2 year older than male. 2. There was a growth peak of nasopharyngeal(NP) height and depth between CVMI 1 to 2 in male, but in female NP height and depth gradually increase through CVMI 1 to 6. 3. Relative airway of nasopharynx increases the most between CVMI 1 to 2 period in both gender. 4. Among adenoid measurements, Ad2-related variables and upper pharynx, and among dentofacial measurements intercanine width in both arch, maxillary intermolar width and palatal depth had high correlation coefficient with adenoid percentage.
Adenoids* ; Cervical Vertebrae ; Child* ; Child, Preschool ; Female ; Growth and Development ; Humans ; Jaw* ; Male ; Nasopharynx ; Pharynx ; Respiration