1,500,00 views on Youtube channel. «The YouTube Dentist Channel». This WebEx was originally broadcast internationally live on Nov 11, 2014 via Zurich Switzerland. www.drscottmaclean.com discusses new technology. The debate between cement free vs screw retained implant crowns is discussed in relation to new technology that enables clinicians to angulate the screw channel using the ASC abutment from NobelBiocare. A case involving a cemented crown is retreated using the ASC abutment