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Results for “FACIAL BONES”

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At least 109 records · Page 6Linked to original sources
PubMed1990

Comparison of biomaterials for facial bone augmentation.

We compared the gross behavior of and microscopic response to implant materials currently in clinical use for facial bone augmentation at different sites in dogs. Materials evaluated include porous polytetrafluoroethylene carbon (Proplast), large-pore high-density polyethylene (Medpor), solid medical-grade silicone rubber (Silastic), polyamide mesh (Supramid), and autogenous rib bone. The subjects were 12 mixed-breed dogs and the materials were implanted directly on bone with periosteum removed at one of three sites in the dog's face (malar eminence, nasal dorsum, and chin). Animals were killed 3 months after surgery and stability of the implants was graded by manual manipulation. Blocks of tissue, including the study materials and underlying bone, were examined microscopically after sectioning. Stability results are tabulated and histologic appearance is described by site for each material evaluated. These data demonstrate marked variability of stability and cellular response depending on the site of implantation. From these data one may conclude that the site of implantation and implant movement are essential factors in determining the nature of the tissue response and fate of an implant. Solid and porous alloplastic materials show an acceptable tissue response, but neither demonstrates the ability to consistently provide an implant that is stable on underlying bone.

Animals↗
PubMedDate not supplied

[X-ray manifestations of fibrous dysplasia of the facial bones].

The paper is concerned with roentgenological characterization of mono- and poly-osseous fibrous dysplasia in cranial facial bones of 60 persons of both sexes and at a different age, of them 14 persons were under 14. Mono-osseous lesions after radical operations were shown to be capable of continued growth of rearranged osseous tissue in those cases when the periosteum was not completely removed.

Adolescent↗
PubMed1989

[Radiologic diagnosis and differential diagnosis of fibrous dysplasia of the facial bones].

A radiologic-pathologic correlative study was carried out on 43 cases with fibrous dysplasia of the facial bones with emphasis on basis for radiological diagnosis. The x-ray manifestations according to density changes are classified into three types: sclerotic, osteolytic and mixed. The lesion extends along the longitudinal axis in the mandible whereas in the maxilla, the lesion spreads in a diffuse pattern along the wall of the maxillary antrum with preservation of maxillary contour. The authors considered that fibrodysplasia and ossifying fibroma are different disease entities and should be distinguished by combination of clinical, radiologic and pathologic evidences.

Adolescent↗
PubMed2005

Predictive value of computed tomography in visual outcome in indirect traumatic optic neuropathy complicated with periorbital facial bone fracture.

The visual outcome of 39 patients who had unilateral indirect type traumatic optic neuropathy and periorbital facial bone fracture treated at the Chang Gung Memorial Hospital in Kaohsiung between June 1996 and June 2001 was retrospectively evaluated, based on the results of computed tomography studies that grouped the associated fractures as anterior orbital fracture, posterior orbital fracture, orbital blow-in or blow-out fracture. Pretreatment and posttreatment visual acuities were obtained from the medical records and measurements of visual improvement degree and percentage were calculated after converting the visual acuities into log of the minimum angle of resolution (log MAR) units. This study reveals that posterior orbital fracture is associated with a worse prognosis in visual outcome than anterior orbital fracture, with visual improvement degree and percentage being 0.86 +/- 0.17 log MAR and 34.2 +/- 1.7% versus 1.56 +/- 0.27 log MAR and 58.9 +/- 1.7%, respectively (P = 0.02 and 0.004). Blow-in fractures such as an impacted lateral orbital wall did not predict significant deterioration in visual outcome. In addition, orbital floor or medial wall blow-out fractures did not predict significant improvement in visual outcome.

Adolescent↗
PubMedDate not supplied

Facial bone fractures in Nigerian children.

A ten year review of ninety-three patients aged 16 years or less treated for facial bone fractures at the University College Hospital, Ibadan was studied. Of the total number of 1203 patients of all ages treated for facial fractures, 93 (7.7%) were within the age range of the study. The male to female ratio was 2.6:1 and majority of the patients (50, 53.8%) were within age group C (11-16 years). The mandible (106, 83.5%) was more involved than the middle third of the facial skeleton (21, 16.5%). Road traffic accidents (51.6%) were the most common cause of facial fractures while the most common concomitant injuries were soft tissue injuries (74.5%).

Adolescent↗
PubMed2004

Indirect traumatic optic neuropathy complicated with periorbital facial bone fracture.

This study evaluated the outcome for 45 consecutive, nonrandomized patients whose indirect type traumatic optic neuropathy and periorbital facial bone fracture were treated at the Chang Gung Memorial Hospital in Kaohsiung between June of 1996 and June of 2001. There were a total of 48 eye injuries in 45 patients (3 patients sustained bilateral eye injuries). Data related to megadose steroid treatment, timing of open reduction and internal fixation for periorbital facial fractures, and pretreatment and post-treatment of visual acuities were collected from the medical records. Measurements of visual improvement in terms of degree and percentage were calculated after the visual acuities were converted into the log of the minimum angle of resolution units. Visual acuities were significantly improved according to mechanism of injury, gender, or associated periorbital skin laceration wound. However, no light perception for eight patients at initial presentation and gradually deteriorating vision in four injured eyes of three patients were identified as poor prognostic factors. Therefore, repeated visual measurements are recommended to detect any gradually deteriorating vision, which although uncommon, has a poor prognosis. No significantly improved vision was found after treatment with megadose steroids. However, if improvement in vision did occur, treatment with megadose steroids resulted in a much greater visual improvement in terms of degree (p = 0.001) and percentage (p = 0.02). Thus treatment with megadose steroid is recommended. No significant differences were found in the visual improvement between those who received and those who did not receive periorbital open reduction and internal fixation operations, and between those who received early repair within 48 hours and those who received late repair after more than 48 hours. However, it seems medicolegally prudent to delay the procedure because some patients may experience gradually deteriorating vision, which has a poor prognosis, and because postoperative visual loss after facial fracture repair did happen.

Adolescent↗
PubMed1991

[Parameters of the facial bones in the fetus. Anthropology and medico-legal application for the determination of the fetal age].

From 93 skulls and 23 foeto-skeletals we give a glimpse of the rhythme of the human foetuse's facial bones growth and the main variations for facial measurements rating during foetal period. The best correlation between foetal age and facial measurements was obtained with facial height (correlation coefficient: 0.96). Evolution of cranio-facial rating, during foetal stages shows essentially: the increase of the height/width facial rating, the same rhythme of growth for frontal and facial width, the rapidly growth of biparietal diameter up to 30 amenorrhea weeks comparatively to the facial and frontal growth in width.

Age Determination by Skeleton↗
PubMedDate not supplied

[Morbidity analysis of 1484 facial bone fractures between 1968 and 1987].

In the years 1968 to 1987 a total of 1484 patients were treated for facial bone fractures at the Hospital for Stomatology and Maxillofacial Surgery of Neuruppin. Most of them were aged between 16 and 25 years. In the majority of the cases, the injuries resulted from acts of violence (40%) and road accidents (35.7%), although the number of care accidents is decreasing. The ratio of mandibular to midfacial fractures is 2.2: 1. Multiple injuries were found in 60% of the patients. The use of surgical treatment methods increased to 30%.

Accidents, Traffic↗
PubMed1998

Primary hyperparathyroidism with osteodystrophia fibrosa of the facial bones in a pony.

A 17-year-old pony mare was admitted for evaluation of progressive enlargement of the facial bones during the preceding 9 months. Laboratory testing revealed that the pony had hypercalcemia, hypophosphatemia, high urinary fractional excretion of phosphorus, and high serum concentration of intact parathyroid hormone (185.1 pmol/L; reference range, 0.25 to 2.0 pmol/L). On the basis of these findings, a diagnosis of primary hyperparathyroidism was made by ruling out nutritional secondary hyperparathyroidism, chronic renal disease, and pseudohyperparathyroidism resulting from neoplasia. Although primary hyperparathyroidism is best treated by surgical removal of the affected parathyroid gland, the owners declined surgical exploration of the neck in this pony. Because of the poor prognosis, the pony was euthanatized. A functional lesion of the parathyroid tissue was not located on necropsy or histologic examination. Difficulty localizing and grossly identifying parathyroid tissue in horses complicates definitive diagnosis and treatment of primary hyperparathyroidism.

Animals↗
PubMed1983

Myelofibrosis of the facial bones.

Idiopathic myelofibrosis is a hematologic myeloproliferative disorder characterized by progressive marrow fibrosis, extramedullary hematopoiesis, and a leukoerythroblastic anemia. Consequently there are frequent secondarily precipitated multiple systems problems. This is the first report of this entity presenting with orofacial findings. The histopathogenesis, clinical presentation, and the therapeutic goals of treatment are reviewed.

Aged↗