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Measurements of pressure on the sole of the foot in plaster of Paris casts on the lower leg.

Pressure on the sole of the foot inside three different types of plaster cast, used in treatment of fracture of the lower leg, was measured on six normal persons. No significant difference was found between these pressures in below-knee plaster, full length plaster including the thigh and patellar-tendon-bearing plaster. Only occasionally a relief in pressure was found in patellar-tendon-bearing plasters.

Casts, Surgical↗

Combined implantation of particulate dentine, plaster of Paris, and a bone xenograft (Bio-Oss) for bone regeneration in rats.

UNLABELLED: The purpose of this study is to assess the combination of particulate dentine and plaster as bone substitute material in calvarial bone defects in rats, and to compare it with a bone xenograft (Bio-Oss). MATERIAL AND METHODS: Forty rats were assigned randomly to five groups and each group was further divided into two subgroups, 8 and 16 weeks after implantation. The defect was filled with different graft materials in each group: Group 1, defects were filled with particulate dentine and plaster using a 2:1 ratio; Group 2, defects were filled with particulate dentine; plaster, and Bio-Oss using a 2:1:1 ratio; Group 3, defects were filled with plaster and Bio-Oss using a 1:1 ratio; Group 4, defects were filled with Bio-Oss only; and Group 5, untreated control defects. Histological sections and histomorphometric analysis of defects were obtained at 8 and 16 weeks postoperatively. RESULTS: New bone formation was highest in Group 4, followed by Group 3, than Group 2, Group 1, and finally the control group. CONCLUSION: The combination of particulate dentine and plaster is an alternative bone substitute, although it is less effective than Bio-Oss.

Analysis of Variance↗

Functional fracture bracing in metacarpal fractures: the Galveston metacarpal brace versus a plaster-of-Paris bandage in a prospective study.

A total of 133 patients with fractures of the second through the fifth metacarpal bones were randomized to receive either a functional brace (the Galveston metacarpal brace) or a dorsal/ulnar plaster cast. Only 42% of the patients in the metacarpal-brace group completed the treatment, in contrast to 81% of the patients in the plaster-cast group. Complications with the brace were due to 60% of the exclusion. No difference according to gender, age, fracture type, hand affected (right/left), or mechanism of injury was observed between the patients who completed the treatment and those who were excluded. Reduction of fractures could not be demonstrated. Reduction of mobility was more frequent in the plaster-cast group, but three months postinjury no reduction of mobility was observed in either group.

Adolescent↗