van Brakel, Ralph Soft tissue response to zirconia and titanium implant abutments: an in vivo within-subject comparison. [electronic resource] - Journal of clinical periodontology Oct 2012 - 995-1001 p. digital Publication Type: Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 1600-051X Standard No.: 10.1111/j.1600-051X.2012.01931.x doi Subjects--Topical Terms: AdultAgedDental AbutmentsDental ImplantsDental Materials--pharmacologyDental Prosthesis, Implant-SupportedDenture, OverlayFemaleGingiva--drug effectsHumansJaw, Edentulous--rehabilitationMaleMandibleMiddle AgedMouth Mucosa--drug effectsSingle-Blind MethodTitanium--pharmacologyZirconium--pharmacology