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Results for “FACIAL BONES”

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At least 73 records · Page 4Linked to original sources
PubMed1982

[Traumatic changes of the base of skull and facial bones in computerized tomography].

During emergency CT examination, impression fractures of the skull, fractures of the base or of facial bones may be diagnosed in addition to possible traumatic intracranial manifestations. If the fractures extend to the base of the skull or to the facial bones, a possible involvement of foraminae, orbitae or nasal sinuses may be recognized. The extent of dislocation of loose bone fragments may be visualized without special conventional X-rays.

Adolescent↗
PubMed2004

Lateral nasal wall mucoperiosteal flap: a versatile new reconstruction of the inner defect of translocated facial bone segments.

From July 1998 to December 2002, 42 patients (including 29 patients who had undergone radiation therapy) underwent a newly designed lateral nasal wall mucoperiosteal flap pedicled anteriorly on the lateral nasal artery of the angular artery to resurface a translocated facial bone segment during a facial translocation approach to the skull base to prevent its avascular necrosis. Of the 42 patients studied, 1 patient had full-thickness flap loss that resulted in bone graft necrosis. Another patient had marginal necrosis. The average length, width, and surface area of the flap was 30 mm, 45 mm, and 1350 mm measured on 5 patients. The mucoperiosteal flap tolerated radiation therapy well. The lateral nasal wall mucoperiosteal flap is a simple, reliable flap that provides ample vascularized tissue to resurface the nude translocated facial bone segment during a facial translocation approach to the skull base. It thus prevents its avascular necrosis even after radiation therapy.

Facial Bones↗
PubMed2005

Evolution and development of facial bone morphology in threespine sticklebacks.

How do developmental mechanisms evolve to control changing skeletal morphology, the shapes and sizes of individual bones? We address this question with studies of the opercle (OP), a large facial bone that has undergone marked morphological evolution in the ray-finned fish. Attributes for developmental analysis motivated us to examine how OP shape and size evolve and develop in threespine sticklebacks, a model system for understanding vertebrate evolution. We find that when Alaskan anadromous fish take up permanent residence in lakes, they evolve smaller and reshaped OPs. The change is a reduction in the amount of bone laid down along one body axis, and it arises at or shortly after the onset of OP development. A quantitative trait locus is present on linkage group 19 that contributes in a major way to this phenotype.

Alaska↗
PubMed1994

Bioresorbable screws for facial bone reconstruction: a pilot study in rabbits.

Rigid fixation using plates and screws is an accepted mode of repair for facial fractures and osteotomies. To avoid potential complications associated with metal implants, bioresorbable implants are being developed. A study was performed to assess the strength over time of three bioresorbable polymeric screws for facial bone reconstruction. Screws of each polymer type and a titanium control were implanted in the periorbital bones of eight rabbits. Rabbits were euthanized at various time intervals. Pull-out testing and histological analysis were performed. Results showed varying degrees of resorption and screw pull-out strength dependent on time and polymer type, and no change in the control. This study demonstrates that bioresorbable screws can be used in bone, although the optimal choices for human implantation are yet to be determined.

Animals↗
PubMed1985

Fractures of facial bones in children.

Data covering 205 children hospitalized for fractures of facial bones in 1971-1982 are presented. In individual types of fractures affecting the lower and middle third of the face, the mechanism of injury is followed up, and the period of time elapsed from the moment of injury to admission to the clinic is registered; results of particular treatment are recorded. New methods of treatment which proved to have a positive effect in practice are described. The necessity of a complex approach to the treatment of children with injuries of the orofacial region is stressed.

Adolescent↗
PubMed1981

A bizarre manifestation of polyostotic fibrous dysplasia of the facial bones.

A 35-year-old white female is presented for case review. According to H. M. Worth, the classification polyostotic fibrous dysplasia, leontiasis ossea type, would be appropriate. Bone lesions are present in the skull, all facial bones, ribs, pelvic girdle and extremities. The patient's oral/maxillofacial appearance is characterized by massive bony protuberances, hypertelorism and malocclusion, resulting in a grossly distorted leonine mask-like facies. Serum alkaline phosphatase levels are high and, in spite of five facial operations, the patient's disease process continues.

Adult↗
PubMed1979

[Fibrous dysplasia of facial bones. 43 cases (author's transl)].

Clinical material of 43 patients treated for fibrous dysplasia of facial bones at the Department of Maxillofacial Surgery, Medical Academy in Cracov in the years 1956--1978 has been investigated. The author's own observations concerning diagnostics and treatment of these patients are presented. Diveristy of clinical forms and variability of the disease process dynamics likewise the difficulties in treatment resulting from unacquaintance with etiology of the disease are emphasized. The results of treatment obtained on the basis of control examination during two to fifteen-year periods of observation are described.

Adolescent↗
PubMed2006

Restricting facial bone growth with skeletal fixation: a preliminary study.

INTRODUCTION: Conventional orthodontic treatment of vertical or anterior maxillary excess by growth modification can be problematic in children because of the high levels of patient compliance required. The purpose of this preliminary study was to investigate the use of rigid skeletal fixation to modify facial bone growth without compliance. METHODS: Three 30-day old female pigs from the same litter were included in phase I. Pediatric miniplates were rigidly fixated with monocortical screws in the experimental pig to bridge the zygomaticomaxillary suture and both the frontonasal and nasomaxillary sutures, bilaterally. In the sham experimental pig, the same surgical protocol was followed, but miniplates were omitted (ie, screw placement only). In the control pig, surgery was not performed. All 3 pigs were housed and fed a normal diet under identical conditions postoperatively for 63 days; then they were killed, their right hemi-skulls were prepared for and underwent 3-dimensional coordinate landmark analysis, and en-bloc specimens from the zygomaticomaxillary, frontonasal, and nasomaxillary sutures of the left hemi-skulls underwent histologic analysis. Two 50-day-old female pigs from the same litter were used in phase II. The same experimental protocol was followed as before for the experimental pig and the sham experimental pig. Both pigs were fed a normal diet for 105 days; then they were killed, and their skulls were prepared for and underwent 3-dimensional coordinate landmark analysis. RESULTS: Rigid plating restricted zygomaticolacrimal suture length, maxillary bone length, nasal bone length, midfacial breadth, and frontal bone length by an average of -14% to -15% (range, -4% to -36%). No growth differences were noted between the animals in maxillary height, mid-premaxillary length, bregma-lambda length, palatal lengths, or mandibular length. Also, plating the sutures produced a clear depressed concavity in the infraorbital region, altered the alignment of the infraorbital plane lateral to the concavity, inhibited the anterior migration of the maxillary tuberosity, and resulted in raised folding on the bony surface adjacent to the zygomaticomaxillary suture. CONCLUSIONS: Rigidly fixating frontonasomaxillary and zygomaticomaxillary sutures inhibits growth of facial bones and might provide a means of restricting excess growth without having to rely on patient compliance. In addition, these altered growth patterns in the plated pig model produced similar and potentially homologous infraorbital features shared by living humans in comparison with ancestral fossil forms.

Animals↗