Über den Autor

ZTM José de San José Gonzàles

Gonzales Zahntechnik
Hauptstraße 4c
69469 Weinheim



  • 1982–1986: Ausbildung bei Strubel-Zahntechnik in Heidelberg
  • 1994: Zahntechnikermeister Handwerkskammer Karlsruhe
  • 1986–1999: Zahntechniker/meister in verschiedenen Laboren
  • seit 1994: Mitglied der Gesellenprüfungskommission und
    Fachreferent an der Meisterschule Karlsruhe
  • seit 1996: Kursreferent an der Meisterschule Karlsruhe zur
    Vorbereitung auf die praktische Prüfung
  • seit 1999: selbständig im eigenen Labor, 16 Angestellte
  • seit 2000: Fachvorträge für Zahnärzte und Zahntechniker in der
    Funktionsanalyse und Kommunikation zwischen Praxis und
  • seit 2008: nationale/internationale Fachvorträge für Zahnärzte und
    Zahntechniker zu Implantatprothetischen Lösungen bei
    schwierigen Ausgangssituationen
  • seit 2008: Anwender von Atlantis-Abutments
    Fachvorträge zu Individuelle Abutment-Herstellung mit
  • seit 2009: Core reference group in Schweden (Entwicklung EV.)
    Stella1u.2 und Ambassadorprogramm EV Implantate


C. Mertens, H. G. Steveling

New possibilities with CAD/CAM bars – six years of experience



The use of bars is a well-documented treatment option for edentulous jaws. The possibility to avoid the casting process and to produce these bars by milling non-precious blanks in different sizes has extended the indication to use bars also for challenging cases.

Background and aim

In the last six years 10 of 150 bar-retained reconstructions were made for patients after a hemi-maxillectomy. Implants were placed in the alveolar crest of the contralateral side and to the os zygomaticum of the ectomy side.

Methods and materials

All impressions were made with an open tray from the abutment level. Due to the different levels of the abutment blanks with the dimension of 65 x 65 x 30 mm were necessary. The major height difference of the abutment was 36 mm. All the bars and supra-construction was made in chrom-cobalt combined with acrylic material.


All bars had an optimal fit and there was no need for a cutting and a new intraoral fixation. The dimension of the bars are always calculated by the manufacturer, so up to now we never have seen mechanical problems even for the challenging indications.

Bildergalerie (22)


  • Heydecke G, Boudrias P, Awad MA, De Albuquerque RF, Lund JP, Feine JS. Within subject comparisons of maxillary fixed 
and removable implant prostheses: Patient satisfaction and choice of prostheses. Clin Oral Implant Res 2003;14:125–30.
  • Ortorp A, Jemt T, Back T, Jalevik T.
 Comparisons of precision of fit between cast and CNC-milled titanium implant frameworks for the edentulous mandible.
Int J Prosthodont 2003;16(2):194–200.
  • Ortorp A, Jemt T. 
CNC-milled titanium frameworks supported by implants in the edentulous jaw: a 10-year comparative clinical study. 
Clin Implant Dent Relat Res 2012;14(1):88–99.
  • Katsoulis J, Mericske-Stern R, Yates DM, Izutani N, Enkling N, Blatz MB. 
In vitro precision of fit of computer-aided design and computer-aided manufacturing titanium and zirconium dioxide bars.
 Dent Mater. 2013 Sep;29(9):945–53.


CAD/CAM bars have a precise fit, no shrinkage cavities and the software always calculate an optimal dimension of the bars. They can be used in standard situations as well as in advanced cases.