Payer M, Heschl A, Koller M, Arnetzl G, Lorenzoni M, Jakse N.
All-ceramic restoration of zirconia two-piece implants-a randomized controlled clinical trial.
Clin Oral Implants Res. 2015 Apr;26(4):371-6.
Paolantoni G, Marenzi G, Blasi A, Mignogna J, Sammartino G.
Findings of a Four-Year Randomized Controlled Clinical Trial Comparing Two-Piece and One-Piece Zirconia Abutments Supporting Single Prosthetic Restorations in Maxillary Anterior Region.
Biomed Res Int. 2016;2016:8767845.
Osman RB, Swain MV, Atieh M, Ma S, Duncan W.
Ceramic implants (Y-TZP): are they a viable alternative to titanium implants for the support of overdentures? A randomized clinical trial.
Clin Oral Implants Res. 2014 Dec;25(12):1366-77.
Osman RB, Ma S.
Prosthodontic maintenance of overdentures on zirconia implants: 1-year results of a randomized controlled trial.
Int J Prosthodont. 2014 Sep-Oct;27(5):461-8.
Nascimento C, Pita MS, Fernandes FH, Pedrazzi V, de Albuquerque Junior RF, Ribeiro RF.
Bacterial adhesion on the titanium and zirconia abutment surfaces.
Clin Oral Implants Res. 2014;25(3):337-43.
Kumar Y, Jain V, Chauhan SS, Bharate V, Koli D, Kumar M.
Influence of different forms and materials (zirconia or titanium) of abutments in peri-implant soft-tissue healing using matrix metalloproteinase-8: A randomized pilot study.
J Prosthet Dent. 2017 Oct;118(4):475-480.
Ferrari M, Cagidiaco MC, Garcia-Godoy F, Goracci C, Cairo F.
Effect of different prosthetic abutments on peri-implant soft tissue. A randomized controlled clinical trial.
Am J Dent. 2015 Apr;28(2):85-9.
Cosgarea R, Gasparik C, Dudea D, Culic B, Dannewitz B, Sculean A.
Peri-implant soft tissue colour around titanium and zirconia abutments: a prospective randomized controlled clinical study.
Clin Oral Implants Res. 2015 May;26(5):537-44.
Carrillo de Albornoz A, Vignoletti F, Ferrantino L, Cárdenas E, De Sanctis M, Sanz M.
A randomized trial on the aesthetic outcomes of implant-supported restorations with zirconia or titanium abutments.
J Clin Periodontol. 2014 Dec;41(12):1161-9.
Thoma DS, Gamper FB, Sapata VM, Voce G, Hämmerle CHF, Sailer I.
Spectrophotometric analysis of fluorescent zirconia abutments compared to „conventional“ zirconia abutments: A within subject controlled clinical trial.
Clin Implant Dent Relat Res. 2017 Aug;19(4):760-766.
