Titanium-zirconium narrow-diameter versus titanium regular-diameter implants for anterior and premolar single crowns: 1-year results of a randomized controlled clinical study

J Clin Periodontol. 2013 Nov;40(11):1052-61. doi: 10.1111/jcpe.12156. Epub 2013 Sep 8.


Aim: To test whether titanium-zirconium (TiZr) 3.3 mm diameter implants perform differently from titanium (Ti) 4.1 mm diameter implants with respect to marginal bone level (MBL) and clinical parameters.

Material and methods: Forty subjects in need of a single implant-supported crown in the anterior or premolar regions were recruited in two centres. After random allocation, either a Ti or a TiZr implant was placed. Definitive crowns were inserted 6 months after implant placement. Implant survival, change in MBL, clinical parameters and occurrence of adverse events were assessed at the 1-year examination.

Results: At 1 year, 38 of the 40 included patients were examined (18 Ti and 20 TiZr implants). All the implants were in place and stable. From the implant placement to the 1-year examination, the change of MBL amounted to -0.40 mm in the Ti group and -0.41 mm in the TiZr group. There were no significant differences between the groups regarding the change in MBL, the clinical parameters and the occurrence of adverse events.

Conclusions: The use of TiZr implants with narrow diameter for the support of single crowns in the anterior and premolar regions leads to successful tissue integration and clinical performance over a 1-year period.

Keywords: crown; dental implants; diameter; fixed partial denture; humans; narrow; radiographic; randomized controlled trial; survival; titanium; titanium-zirconium.

Publication types

  • Comparative Study
  • Randomized Controlled Trial

MeSH terms

  • Absorbable Implants
  • Adult
  • Aged
  • Aged, 80 and over
  • Bicuspid
  • Bone Substitutes / therapeutic use
  • Crowns*
  • Cuspid
  • Dental Implant-Abutment Design
  • Dental Implants, Single-Tooth* / adverse effects
  • Dental Materials / chemistry*
  • Dental Plaque Index
  • Dental Prosthesis Design*
  • Dental Prosthesis, Implant-Supported
  • Female
  • Follow-Up Studies
  • Humans
  • Incisor
  • Male
  • Membranes, Artificial
  • Middle Aged
  • Osseointegration / physiology
  • Periodontal Index
  • Prospective Studies
  • Titanium / chemistry*
  • Treatment Outcome
  • Young Adult
  • Zirconium / chemistry*


  • Bone Substitutes
  • Dental Materials
  • Membranes, Artificial
  • Zirconium
  • Titanium