. Journal of anatomy. he nasal septum. The upper teeth do not overlap the lower in front, but meet themirregularly and incompletely; the boy was not conscious of any incon-venience. Neither his face nor his voice would strike a lay observer asunusual, and no abnormality had been suspected by his parents or hisschoolmasters. Absence of Pre-maxilla 393 Anatomically, the abnormality consists of a deficient ossification of thenasal septum and a complete absence of the pre-maxilla (fig. 2). The latterdeficiency has partially been made good by the two maxillary processesgrowing forwards and inwards,
. Journal of anatomy. he nasal septum. The upper teeth do not overlap the lower in front, but meet themirregularly and incompletely; the boy was not conscious of any incon-venience. Neither his face nor his voice would strike a lay observer asunusual, and no abnormality had been suspected by his parents or hisschoolmasters. Absence of Pre-maxilla 393 Anatomically, the abnormality consists of a deficient ossification of thenasal septum and a complete absence of the pre-maxilla (fig. 2). The latterdeficiency has partially been made good by the two maxillary processesgrowing forwards and inwards, meeting in the mesial plane and bearingthe two canines almost into the position of the central incisors. The anatomical deficiencies are situated in what was the mesial nasalprocess of the embryo; other portions of the same process, such as the tipof the nose and the middle portion of the upper lip, show no deficiencies. As to the origin of the defect, the available history is an uncertainouide. It is as follows :—. Fig. 1. The mother was unconscious of any abnormality. When pressed formemories, however, she thinks the first teeth to erupt were the two upperfront ones; she does not remember the order of the remainder. Whenthree years old the boy had measles, and was seriously ill. He then pulleda tooth, or it may have been one or two teeth, with some flesh attached,out of his mouth, and handed it to her; she promptly threw the articleaway. Soon after this he was admitted to the Sick Childrens Hospital,Birmingham. The mother does not remember any remark having beenmade there about his teeth, and the case cannot be traced among thehospital records. There is no history of any injury. There are twobrothers and one sister younger, all normal. No case of hare-lip or cleft-palate is known in the family. So far as any reliance can be placed on this history, it suggests that 394 Dr Cranston Walker the pre-maxilla was not congenitally absent, but that it sloughed awaydurino an attack
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectanatomy, bookyear1867
