A 3-Year Split-Mouth Randomized Controlled Clinical Trial of Zirconia and Titanium Implant-Supported Overdentures. - Kniha, Kristian; Rink, Lothar; Ooms, Mark; Schaffrath, Katharina; Möhlhenrich, Stephan Christian; Hölzle, Frank; Modabber, Ali; Heitzer, Marius (Journal of Functional Biomaterials, 2026)