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Biomedical subjects

L R Chasmar

Publications and source records attributed to L R Chasmar.

6 recordsLinked to original sources
PubMed1986

Reconstruction of the atrophic mandible.

Because atrophy of the jaws in edentulous patients is a major health problem, how best to reconstruct the atrophic mandible is a dilemma that frequently confronts the medical and dental professions. After loss of the natural dentition, the reduction of the residual ridges is progressive, irreversible, and cumulative. The cause and pathogenesis of mandibular atrophy is discussed. In the evaluation of a patient, the amount of residual bone at the symphysis should be measured on the lateral cephalometric radiograph as an aid to treatment planning. This measurement allows the degree of atrophy to be classified as minor, moderate, or severe. The current techniques to rehabilitate the edentulous mandible, including relative and absolute heightening techniques and implants, are reviewed with illustrative examples. A modification of a previous absolute heightening osteotomy technique utilizing pedicle bone flaps, is presented.

Adult↗
PubMed1980

Frostbite in Saskatoon: a review of 10 winters.

In a review of 101 patients suffering from frostbite who were admitted to hospitals in Saskatoon during 10 winters, it was found that alcohol consumption was a contributing factor in 39 patients and a motor vehicle accident or breakdown in 33 others. Sixty-six patients underwent primary treatment in Saskatoon, the other 35 were referred for management of demarcated gangrene. Two hospitalized patients died, both of causes unrelated to the frostbite. The preliminary results of bone scanning with radioactive technetium methylene diphosphonate in frostbitten patients suggest that this is not a good prognostic indicator of the ultimate extent of tissue loss until 5 days have elapsed from the time of exposure. The lesion appeared to decrease in extent and increase in depth over a 3-week period. The mainstays of treatment remain rapid rewarming and adequate delay before conservative débridement or amputation. The delay allows healing of partial-thickness injuries and demarcation of full-thickness injuries. One third of patients receiving primary care in Saskatoon required amputation.

Adolescent↗
PubMed1979

Concomitant treatment of developmental jaw deformities with rhinoplasty.

The purpose of this paper is to emphasize the importance of a complete assessment of facial profile and dentition in selected patients who seek rhinoplasty or correction of developmental jaw anomalies. To offer these individuals the optimum result, it is mandatory to have close liaison with an orthodontic colleague. At times it may be necessary for the surgeon to urge orthodontic care even though this was not contemplated by the patient. The orthodontist will prepare occlusion and study models of the teeth. X-ray examination includes a Panorex projection and cephalometric radiography. The surgeon should be familiar with the rudiments of skeletal analysis, as it facilitates joint discussion of the proposed treatment. Soft tissue profile, photographs, and clinical examination complete the assessment. A wafer splint is an important adjunct for accurate placement of the occlusion at the time of surgery. Three patients are presented to illustrate the advantage of combined treatment planning. The end result in each has been enhanced. In maxillary protrusion, simultaneous osteotomy and rhinoplasty have halved the surgical procedures required.

Adolescent↗
PubMed1967

Electrical burns.

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Adolescent↗