Influence of Scar Tissue Formation on Ultrastructure of the Palatal Bone Surface in Rats
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概要
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This study examined the ultrastructural changes in the palatal bone surface induced by scar tissue formation on the palate. Male 20-day-old Wistar rats were divided into experimental and control groups. In the experimental group the bilateral mucoperiosteum was excised in the lateral one third of the palate. At the 6th week following the surgical procedure, changes in the lamina propria and bone surface of the denuded bone area were investigated by light and scanning electron microscopy. In the control group, fibrous connective tissue with horizontally oriented collagen fibers were found beneath the epithelium, and there was periosteum along the bony surface. Scanning electron microscopy of the control group showed regularly arranged blood vessel holes on the bone surface. The experimental group showed dense fibrous connective tissue with matted collagen fibers were present in the lateral operated area without periosteum. Scanning electron microscopy showed rough bone surface with vague appearance of collagen bundle structures. Fewer blood vessel holes were seen on the bone surface than in the control group. The results suggested that scar tissue formation by mucoperiosteal denudation of the palate deteriorates vascular supply to the bone, which results in the palatal bone growth inhibition.
- 歯科基礎医学会の論文
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