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Results for “Frontal Bone”

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At least 91 records · Page 5Linked to original sources
PubMed1995

Intramatrix rotation--the frontal bone.

Intramatrix rotation during growth and development was studied by 2-D cephalometric technique with the use of metallic implants in the frontal bone in five patients at the Centre for Craniofacial Anomalies, Malmö General Hospital. The analysis of the frontal bone in the five patients showed rotations of the corpus inside the periosteal matrix from 1 to 9.5 degrees in the mid-sagittal plane. The essential conclusion of these observations is that an intramatrix rotation takes place during the development of the frontal bone. This observation will stimulate further studies of its nature, amount, and direction.

Adolescent↗
PubMed1991

Frontal bone advancement stability with or without microplate fixation: an experimental study in rabbits.

Recent advancements in surgical correction of coronal suture craniosynostosis involve the overcorrection of a frontal bone segment to allow unrestricted growth of the developing brain. However, problems with segment stability and collapse have been reported. Such problems may be alleviated with microplate fixation of the segments. The present experimental study tests this hypothesis in a growing rabbit frontal bone advancement model. Sixteen 6-week-old rabbits were divided into three groups, consisting of animals with short bone segments advanced with two bone struts and fixed with Vicryl, long bone segments advanced with one bone strut and fixed with Vicryl, or long bone segments advanced with one bone strut and fixed with microplates. Frontal bone advancement collapse was assessed from lateral x-rays through 12 weeks postoperatively. Animals with microplate fixation exhibited significantly (p less than 0.01) less collapse (about 1% height reduction) compared to animals with short segments (about 30%) and long segments (about 45%). These results support, with experimental evidence, the utility of rigid three-dimensional fixation afforded by the microplate system in overcoming the effects of cranial growth and scalp and epicranial musculature closing tensions.

Analysis of Variance↗
PubMed1990

Solitary plasmacytoma of the frontal bone.

We report a case of a solitary, painless, lytic lesion in the frontal bone in an otherwise asymptomatic patient. This was investigated with plain radiographs, computed tomography (CT), angiography and finally biopsy. Histology showed it to be a plasmacytoma. The radiological features of this lesion are discussed. Solitary plasmacytoma of bone has an uncertain relationship to multiple myeloma; it has only rarely been described in the skull and very rarely in the frontal bone.

Adult↗
PubMed1990

Frontal bone epidermoid--a rare cause of proptosis.

Frontal bone epidermoid is a rare condition which may present with proptosis, extraocular muscle imbalance, or loss of vision. Clinically and on plain radiographs an epidermoid may be confused with commoner conditions such as frontal mucocoele. However, the characteristic CT scan appearance, which shows a bone cyst with similar density to brain tissue, should lead to an accurate diagnosis and appropriate surgical management.

Bone Cysts↗
PubMed1984

Lipomas in the corpus callosum and the forehead, associated with a frontal bone defect.

This report concerns a case of lipomas in the corpus callosum, possibly both lateral ventricles, and the forehead, which were associated with a defect in the frontal bone. It is thought that the lipoma originated in the interhemispheric fissure and extended to the forehead by at least the second month of gestation. It interfered with the development of the corpus callosum, and the collagenous capsule of the lipoma remained till birth. It caused a defect in the frontal bone in the midline, in spite of the development of both frontal bones.

Brain Neoplasms↗
PubMed1998

Endoscopic osteosynthesis for frontal bone fracture.

Endoscopic surgery to repair a frontal bone fracture is described. This operation is less invasive than the conventional open technique, which is performed under direct vision through a bicoronal or eyebrow incision. Endoscopic surgery leaves no conspicuous scars in the forehead and is free from complications such as nerve or vascular injuries, and appears to be of significant clinical value.

Adult↗
PubMed1978

[Contribution to chronical osteomyelitis of the frontal bone (author's transl)].

Osteomyelitis of the frontal bone occurs in an acute and in chronical form. Aetiology and pathogenesis of the chronical form will be described. It is said, that by usage of antibiotics the typical findings and courses have been changed. According to three own cases osteomyelitis appeared in a haematogene metastatic form after a maxillary sinusitis in different intervals. The outcomes are described and compared with literature. The cause is considered being an unsufficient antibiotical treatment of maxillary sinusitis.

Adolescent↗
PubMed1980

Nonrepair of exposed frontal bone after Mohs' surgery for extensive basal cell carcinoma.

When it is necessary to expose frontal bone with or without periosteum after Mohs' surgery for extensive carcinomas of the forehead, simple wound care will allow granulations to cover the bone and healing will be complete. In situations where it is not advisable to cover exposed frontal bone with or without periosteum, simple care of the defects should allow complete healing.

Adult↗
PubMedDate not supplied

Injury to the orbital plate of the frontal bone.

Twelve cases of fracture of the orbital plate of the frontal bone are reviewed to clarify this important clinical problem and to suggest satisfactory methods of management. Common signs and symptoms include forehead laceration and deformity, and fracture of the frontal sinus. Loss of vision can occur, and in the seeing eye, diplopia can develop in several fields of gaze. Downward or upward projection of the orbital plate of the frontal bone can cause exophthalmos or enophthalmos. Cerebrospinal fluid leak, with or without meningitis, and seizures can also be part of the syndrome. Effective treatment consists of repairing or obliterating the frontal sinus, reducing the orbital root fracture, and repositioning the globe. Rib or iliac crest grafts, acrylic implants, and temporalis muscle-galea flaps are useful in correcting the deformity and restoring appropriate function. Long-term follow-up examinations are an important part of patient care.

Adult↗
PubMed1980

[A case of eosinophilic granuloma of the frontal bone (author's transl)].

Osteolytic focusses in the frontal bone are frequently considered as complication of the frontal sinus or as metastatic process. It is necessary to mention the eosinophilic granuloma of the bone, which is not quite seldom in this area. An operation must be done in most cases to obtain the histology and, in the same way, as treatment.

Child↗
PubMed1991

[Histochemical study on effect of radix Salviae miltiorrhizae on growth of isolated cells from embryonic chicken frontal bone cultured in vitro].

12-day embryonic chicken frontal bone digested with trypsin to prepare the suspension of isolated bone cells. 3 x 10(6) cells were harvested altogether. The cells were divided equally into five parts. Then the Eagle medium and 0.1%, 0.2%, 0.4% and 0.8% Radix Salviae Miltiorrhizae in Eagle medium were added respectively and cultured in 5% CO2 incubator. It was observed under the inverted microscope every day. At the 26th day of culture, the cells were studied. The specimens were stained with H. E., Alcian Blue-Sirius Red, Alizarin Red S staining and alkaline phosphatase-acid phosphatase reaction for comparison. It was found that the maturation of the osteoblast-like cells could be accelerated by Radix Salviae Miltiorrhizae. Secretion of the collagenous substance, positive alkaline phosphatase reaction and deposition of mineral on the collagenous substance, forming bone nodules were found to be enhanced. But unduly high concentration of Radix Salviae Miltiorrhizae could lead to inhibition of osteoblast-like cell growth. The optimal concentration of Radix Salviae Miltiorrhizae was 0.2% in culture medium.

Animals↗
PubMed1975

Growth in width of the frontal bones after fusion of the metopic suture.

Rat frontal bones reportedly exhibit lateral surface growth many weeks after fusion of the frontal suture. This is histologically confirmed in the present study. The mean width of the cranial vault at the postorbital constriction increased by 10% between the age of 30 and 58 days. The increase must be ascribed to periosteal growth, as the lateral, external surfaces exhibited active growth. External apposition without concomittant internal resorption causes an increase in bone thickness. The cells on the internal surfaces were in a state of rest. The study was based on a limited material; therefore, definite conclusions cannot be drawn.

Animals↗
PubMed2005

Taxonomic status of purported primate frontal bones from the Eocene Pondaung Formation of Myanmar.

Two isolated cranial fragments from the late middle Eocene Pondaung Formation of central Myanmar have previously been interpreted as frontal bones of the amphipithecid primate Amphipithecus mogaungensis. Aside from a few maxillary fragments, these specimens provide the only potential source of information currently available regarding the cranial anatomy of Amphipithecidae. Were this taxonomic attribution correct, these specimens would indicate that amphipithecids retained numerous primitive skull features, including the absence of a postorbital septum, the retention of a voluminous olfactory chamber, and strong separation between the forebrain and the orbital fossa. However, several anatomical details observable on these specimens are incompatible with their attribution to any primate and strongly suggest that they cannot be ascribed to Mammalia. Particularly problematic in this regard are the extreme thickness of the dermal bone, the odd structure of the alleged "frontal trigon," and the mediolateral orientation and uniquely robust construction of the descending process of the frontal bone (which partially segregates the orbital and temporal fossae). Because these isolated elements can no longer be attributed to Amphipithecus, the anatomical, phylogenetic, and behavioral inferences regarding amphipithecid paleobiology that have been drawn from these specimens can no longer be sustained.

Animals↗