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Coronal leakage is now recognized as an important cause of failure of root canal treatment. This pathway of leakage may be affected by the presence or absence of the smear layer that in turn may affect the close adaptation between the root canal filling material and the root canal walls. This may result in subsequent coronal leakage and failure of treatment. The aim of this study was to compare the sealing ability of AH Plussealer to the canal wall in the presence and absence of the smearlayer. Author Information Mutasim Elnour BDS, MSc is a lecturer of the restorative dentistry at the National Ribat University, Sudan, he received a Master of Science degree in restorative Dentistry from the University of the Western Cape, Cape Town. Yusuf Osman BChD, MChD, BBA, MBA, PGDHM completed his dental training at the University of the Western Cape (UWC) in 1978. He was the first recipient of the Gold Medal of the South African Dental Association awarded at UWC. In 2000 he successfully completed the Hospital Leadership programme at the University of Cape Town and in 2001 he was awarded the Honours Bachelors in Business and Administration degree by the University of Stellenbosch. In 2004 he was awarded the Master of Business Administration (MBA) also by the University of Stellenbosch. In 2009 he was awarded the Oliver Tambo Fellowship and also received the Post-graduate diploma in Health Management from the University of Cape Town.His current position is that of Dean/Manager of the Dental Faculty and the Oral Health Centres of the University of the Western Cape in Cape Town.
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