Our dental practice has ongoing clinical investigations with milled ceramic restorations. We are tracking the clinical performance of many of the materials used every day in dental offices. From inlays and veneers to implant abutments and ceramic fixed dental prostheses, we are constantly monitoring performance and complications. We will be updating our findings yearly.

Clinical Performance of Single-Unit Milled Ceramic Restorations

Observations have been recorded since 2006 with restorations milled from Vita II (feldspathic), and e.maxCAD (lithium disilicate). The performance summary for these two materials are noted in the slides below. Observations with monolithic zirconia restorations and a resin-based material, 3M-ESPE Lava Ultimate, are in progress.

Bottom line, the e.maxCAD lithium disilicate (LD2) materials continue to provide outstanding results. Fracture was less than 1%, and overall complications (2.8%). LD2 outperformed the Vita II feldspathic ceramics. Both materials had complications. The critical note was the TYPE of complication between the two materials. The LD2 restorations needed a second cementation more often, while the feldspathic restorations fractured more often.

Molar restorations fabricated from Vita II materials tripled complications (mostly fractures).

Full coverage crowns in either material had twice as many overall complications as partial coverage restorations with either material. Complications included fractured restorations, loss of retention requiring re-cementation, recurrent caries, need for endodontics, and fractured roots.




Occlusal Adjustments within the First Year of Placement of Single-Unit Restorations

A retrospective analysis of three, and in the future an upcoming fourth method, of designing the occlusal surfaces of restorations for single teeth or implants is ongoing.

  • Group 1 includes all restorations covering occlusal surfaces fabricated from semi-adjustable articulators and prior to the introduction of CEREC to our office.
  • Group 2 is with CEREC Red Cam with 3D software.
  • Group 3 is with CEREC Blue Cam and Buccal Bite software.
  • Group 4 will test the future Virtual Articulation software. The first three groups are presented below.




Clinical Performance of Milled Ceramic Veneers

An ongoing investigation of the clinical performance and complications with milled ceramic veneers fabricated using the CEREC methodology of various materials.

  • Point 1
  • Point 2
  • Point 3




Clinical Performance of Titanium-Zirconia Hybrid Milled Implant Abutments

An ongoing investigation is under way for the clinical performance and complications with the milled Sirona ‘TZ’ abutment using the CEREC methodology.

  • Point 1
  • Point 2
  • Point 3