A. 50 minutes is fine , if NHS we will tidy up any other loose ends and have spare time. If private we will stick to the root treatment. The basic colour of a dental crown is matched to a shade guide of around 16 – 24 colours . Depending on the quality of the crown a larger range is achieved by blending colours and varying the colour within a single crown , effects can be also be added to blend with natural imperfections on adjacent teeth The NHS does not specify the appearance of a crown only that is suitable for functioning. they cost £198 for an all metal crown Private crowns range from £385 to £700 Gold or tooth coloured porcelain fused to metal sub frame are at the £385 end All ceramic, zironia based crowns around £550-700 Private root treatments use a full set of “Densply Protaper” files and also some auxillary files, Rubber dam, sodium hypochlorite , EDTA gel, the list goes on , the emphasis is on chemical sterilisation after mechanical cleaning and shaping. The NHS technique which does provide a satisfactory result, relies more on the mechanical cleaning and shaping. The result is a reduced success rate compared to a the first method. I stress here that no treatment is carried out that is designed to fail. Rob