The subjects will be asked to return after six months of cementation. Polyvinylsiloxane impressions will once again be made of maxillary and mandibular arches and poured with Type IV stone. The antagonist teeth and the crown will be scanned using the 3D Laserscanner. Superimposition of baseline image and the six-month image will be performed and the amount of wear in three dimensions calculated mathematically. Vertical dimension of occlusion will also be determined by measurement of nasion to the lowest point on the chin and periapical radiographs taken of the restored teeth using the LRA technique. This procedure will be repeated every year for the next four years.