The Science and Art of Surgery; Being a Treatise on Surgical Injuries, Diseases, and Operations Volume 1
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1884 edition. Excerpt: ... 974, Vol. I. The mode of origin of the various deformities of the face is therefore evident. If one maxillary plate fails to unite with the naso-frontal in front, a cleft will be left through the upper lip on one side of the middle line, forming a single hare-lip. If both plates fail to unite a double hare-lip results, and the intermaxillary bone may be left adherent to the tip of the nose and septum nasi. If at the same time the development of the naso-frontal process is arrested, we get the rare condition of a wide gap in the middle line with absence of the incisor portion of the superior maxilla. If the anterior parts unite but development is arrested poste Fig. 700.--Onlinary Double Harelip. Fig. 701.--Onlinary Double Hare-lip. Side View. riorly, cleft palate results, the fissure being single, and in the middle line as far as the posterior part of the premaxillary bone. If the arrest of development is more complete, the fissure may extend to the lip, deviating in front from the middle line as it passes between the main part of the sujierior maxillary and the pre-maxillary bone. If both sides fail to unite completely the fissure is single behind and double in front, passing on each side of the intermaxillary hone. In exceedingly rare cases the fissure of the hare-lip has been seen extending upwards on one side of the nose towards the eye. Macrostonia or congenital transverse fissure of the cheeks results from arrested union of the superior and inferior maxillary plates. Single Hare-lip is by far the most common deformity (Fig. 609). In it the mesial side of the gap is usually rounded; the outer edge is flattened; and the froenum at the angle is long and subcutaneous. It most frequently, so far as I have observed, occurs upon the left 6ide....
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