McQuade, M J Effect of ultrasonic instrumentation on the retention of simulated cast crowns. [electronic resource] - The Journal of prosthetic dentistry Jun 1978 - 640-2 p. digital Publication Type: Journal Article ISSN: 0022-3913 Standard No.: 10.1016/s0022-3913(78)80074-2 doi Subjects--Topical Terms: CrownsDental InstrumentsDental Prophylaxis--instrumentationDental Scaling--instrumentationDenture RetentionEvaluation Studies as TopicStress, MechanicalUltrasonics--instrumentationZinc Phosphate Cement