title: Implant survival and patient satisfaction of reduced diameter implants made from a titanium-zirconium alloy: A retrospective cohort study with 550 implants in 311 patients.
abstract: The aim of the study was to evaluate implant survival of reduced-diameter implants compared to regular-diameter implants. A retrospective evaluation of 154 Straumann Bone Level Roxolid®implants (diameter 3.3 mm) with SLActive®-surface in 107 patients, which were inserted between 2009 and 2010 in private practice, was performed. The mean observation period was 22.4 ± 8.2 months. 396 Straumann SLActive®implants (4.1 mm and 4.8 mm) in 204 patients, with an observation period of 28.4 ± 10.1 months served as control group. Implant survival rate, resonance frequency analysis and patient satisfaction were evaluated. The implant survival rate was 97.4% in the test vs. 98.5% in the control group. Resonance frequency analysis showed statistically significant lower values for the reduced-diameter implants. Patient satisfaction showed no significant difference between the test and the control group. Reduced-diameter implants displayed high survival rates during the period investigated and represent a convincing treatment alternative. Long-term follow-up investigations confirmed the high implant survival rates of 96.8% (after 69.7 ± 12.3 months) in the test group and 98.5% (after 76.0 ± 13.6 months) in the control group.
authors.affiliation: Private Practice, Lothar-Streit-Straße 10b, 08056 Zwickau, Germany; Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Herrmann
authors.affiliation: Private Practice, Lothar-Streit-Straße 10b, 08056 Zwickau, Germany; Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Hentschel
authors.affiliation: Institute for Medical Informatics and Biometry (IMB) (Director of the Institution: Prof. Dr. rer. med. Ingo Röder), Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany.
authors.forename: Ingmar
authors.initials: I
authors.lastname: Glauche
authors.affiliation: Straumann GmbH, 79111 Freiburg, Germany.
authors.forename: Armin
authors.initials: A
authors.lastname: Vollmer
authors.affiliation: Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany.
authors.forename: Karl Andreas
authors.initials: KA
authors.lastname: Schlegel
authors.affiliation: Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany. Electronic address: Rainer.Lutz@uk-erlangen.de.
authors.forename: Rainer
authors.initials: R
authors.lastname: Lutz
mesh_terms: D000368:Aged; D003722:Dental Alloys / Q000627:therapeutic use*; D015921:Dental Implants / Q000706:statistics & numerical data; D017268:Dental Prosthesis Retention / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction / Q000706:statistics & numerical data; D012189:Retrospective Studies; D013997:Time Factors; D014025:Titanium; D015040:Zirconium
chemical_list: D003722:Dental Alloys; D015921:Dental Implants; D015040:Zirconium; D014025:Titanium
keywords: Dental implants; Implant diameter; Patient satisfaction; Resonance frequency analysis