Plaque is a soft, colorless deposit containing bacteria that adheres to the surface of teeth and surrounds gingiva other hard surfaces in oral cavity. A disclosing agent selective dye can detect presence dental plaque by changing color so it contrasts with tooth surface. Henna has many properties produce staining. Lawsone main ingredient henna plant. high affinity for binding proteins causing T...

in september 2007 national standard manual was finalized and officially announced as the minimal quality requirements for all medical laboratories in the country. apart from auditing laboratories, reference health laboratory has performed benchmarking auditing of medical laboratory network (surveys) in provinces. 12(th) benchmarks performed in tehran and alborz provinces, iran in 2010 in three ...

STATEMENT OF PROBLEM Providing the dental laboratory with an accurate replication of the hard and soft tissue of a patient is important. Therefore, it is essential to examine whether clinicians critically evaluate impressions routinely before sending them to the laboratory. PURPOSE This study evaluated the quality of impressions sent to commercial laboratories for the fabrication of fixed par...