Mohamed E Sanad

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PURPOSE The purpose of this in vitro study was to measure the loss of retention and wear of two clasp types (E-circlet, back action) against three abutment materials (enamel, composite, CAD/CAM ceramic) after 16,000 simulated cycles of attachment-detachment. MATERIALS AND METHODS Forty-eight models were constructed by placing either an upper first(More)
PURPOSE The purpose of this study was to compare the retention of circlet (E) clasps and back-action clasps against three abutment surface materials during long-term simulation of attachment and detachment. MATERIAL AND METHODS Forty-eight test models were constructed by placing premolars (natural abutments or metal dies) inside metal blocks to test(More)