A Study on Growth Changes in the Pharyngeal Airway
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概要
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Adeno-tonsillar hypertrophy, which occurs in the pharynx, is said to cause malocclusion by affecting the tongue and perioral musculature. An examination was made of the degrees of such adeno-tonsillar hypertrophy and the growth changes taking place in the pharyngeal airway. The data used in this study came from lateral radiographic cephalograms taken of 109 young children (3 to 9 years of age)who had never undergone an adeno-tonsillectomy and had no marked abnormality in the dental occlusion. The following conclusions were obtained.<BR>1) Since personal differences are considered to be substantial in the size of the pharyngeal tonsils, the changes resulting from the aging of a child have not yet been clarified. However, it was observed in this study that the size of the pharyngeal tonsil continued to increase during the period from the ages of 3 to 6 and peaked at the age of 6. After that, it kept on decreasing until the child reached 8 and, from the age of 9, it again began to show a tendency to increase.<BR>2) The airway at the nasopharynx continued to narrow during the period of 3-4years of age, showed a maximum narrowing during the age of 4-6 and then again began to show a tendency to widen.<BR>3) The pharyngeal airway is also influenced by the size of the skeletal nasopharynx. However, during the period from the ages of 3 to 9, it appeared that the pharyngeal airway was influenced more strongly by the size of the pharyngeal tonsil.<BR>4) It was found that the lower pharynx, as measured at the oropharynx, showed almost no growth change resulting from the aging of the child.<BR>5) The lower pharynx was observed as having a positive interrelationship with the adenoid area and also with the airway percentage.
- The Japanese Society of Pediatric Dentistryの論文
The Japanese Society of Pediatric Dentistry | 論文
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