摘要:

&NA;Sutural anomalies in conjunction with craniofacial clefting are unusual. A case of median frontal clefting is presented in which there was an absence of a normal metopic suture and replacement by paramedian frontal sutures. The association of an underlying brain anomaly, with attendant surgical difficulties, is noted, as are the radiological techniques of preoperative diagnosis.

ISSN:1049-2275    

出版商:OVID    

年代:1991

数据来源: OVID

ISSN:1049-2275    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

&NA;Recent clinical advances in the surgical correction of coronal suture synostosis involve the overcorrection of a frontal bone segment to allow for unrestricted expansion of the developing neurocapsular matrix. However, the effects of such largescale calvarial repositioning on subsequent brain mass growth trajectories and compensatory craniofacial growth changes is unclear. This study was designed to investigate this relationship in an experimental rabbit model of bilateral coronal suture synostosis. Amalgam markers were placed across the frontonasal, coronal, and anterior lambdoid sutures in thirty‐one 1.5‐week‐old rabbits. Twenty‐one animals underwent bilateral coronal suture immobilization using methyl‐methacrylate. Ten animals were left untreated and served as sham controls. At 6 weeks of age, the coronal suture was released by frontal bone craniotomy or frontal bone craniotomy with a 6‐mm frontal bone advancement. Lateral head radiographs were taken at 1.5, 6, 7, 9, 12, and 18 weeks of age. Results revealed that by 6 weeks of age, animals with coronal suture immobilization exhibited growth disturbances across the various sutures resulting in altered craniofacial and cranial vault shape compared to control animals. Following coronal suture release, animals that underwent craniotomy showed rapid restenosis, which resulted in significantly altered cranial vault shape and cranial orthocephalization by 18 weeks of age. Animals that underwent frontal bone advancement exhibited normal overall craniofacial growth by 18 weeks of age compared with control animals but did exhibit regional compensatory growth disturbances at the frontonasal and anterior lambdoid sutures, possibly related to neural tissue distension. Findings suggest that the fibrous (endosteal) portion of the neurocapsular matrix may have an important role in upper midfacial remodeling in this rabbit model. Clinical significance is discussed.

ISSN:1049-2275    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

&NA;Traumatic loss of large portions of the maxilla remains uncommon. Reconstruction demands careful attention to both the anatomy of the primary deformity as well as the associated secondary changes if there is to be acceptable restoration of facial aesthetics and function. In concert with rebuilding the missing maxilla, reconstruction may frequently involve repositioning the apparently undisturbed mandible.

ISSN:1049-2275    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

&NA;The alveolar ridge bend and length were measured in the interforaminal part of the upper and lower jaws in 338 anthropological skulls. Interforaminal sections were determined by projection of the most medial points of the two foramina infraorbitale and foramina mentale at right angles to the alveolar ridge bends. Interforaminal arch lengths and radii of the circles that best fit the arches were analyzed with the use of celluloid transparencies. The differences between female and male group samples and the left and right sides were established. The data were processed by computer and were used for the development of a series of endosseous dental implants to satisfy various anatomical conditions.

ISSN:1049-2275    

出版商:OVID    

年代:1991

数据来源: OVID

ISSN:1049-2275    

出版商:OVID    

年代:1991

数据来源: OVID

ISSN:1049-2275    

出版商:OVID    

年代:1991

数据来源: OVID