Fig.5 shows that the abutment (A) has been screwed into the implant (I) and cemented in place nicely (C).  White arrowheads point to junction between the abutment and the implant.  It seems that the seal is pretty tight. To make the seal even more secure, special implant preparation (grinding) is done so that the crown (Fig.6 C) covers from the top until the border on the side of the implant indicated by the blue arrowheads in Fig.5-7.  The junction of abutment/implant is not exposed to oral fluid and bacteria once the crown is cemented.  Return to main article

Xin Wei, DDS, PhD, MS 1st edition 08/05/2012, last revision 09/28/2012