Abstract
This study demonstrated histologic and physical changes in palatal mucoperiosteum when subjected to mechanical stress. When stressed, the epithelial ridges and connective tissue papillae were flattened and obliterated. With 5 g/mm 2 and 20 g/mm 2 loads applied for 6 hr the oral mucoperiosteum was compressed to 45 per cent of the original thickness. In the epithelial layer there was no significant difference in indentation between the 5 g/mm 2 and 20 g/mm 2 loads after 30 min. However, the response of connective tissue was different to the two loads throughout the 6 hr period. With the loads applied for 6 hr the tissues demonstrated viscoelasticity or creep effect. Microscopic changes in the epithelium are described.
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