Space requirement of a prefabricated bar on two interforaminal implants: a prospective clinical study

Albrecht, Dominic; Ramierez, Ami; Kremer Hovinga, Urs; Katsoulis, Joannis; Mericske, Regina; Enkling, Norbert (2015). Space requirement of a prefabricated bar on two interforaminal implants: a prospective clinical study. Clinical oral implants research, 26(2), pp. 143-148. Wiley-Blackwell 10.1111/clr.12304

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This clinical study measured the dimensional changes of existing lower complete dentures due to the integration of a prefabricated implant bar. Additionally, the impact of this dimensional change on patient satisfaction and oral function was analyzed.


Twenty edentulous patients (10 men/10 women; aged 65.9 ± 11.8 years) received two interforaminal implants. Subsequent to surgery, a chair side adapted, prefabricated bar (SFI Bar(®), C+M, Biel, Switzerland) was inserted, and the matrix was polymerized into the existing lower denture. The change of the denture's lingual dimension was recorded by means of a bicolored, silicone denture duplicate that was sectioned in the oro-vestibular direction in the regions of the symphysis (S) and the implants (I-left, I-right). On the sections, the dimensional increase was measured using a light microscope. Six months after bar insertion, patients answered a standardized questionnaire.


All dentures exhibited increased lingual volume, more extensively at S than at I (P = 0.001). At S, the median diagonal size of the denture was doubled (+4.33 mm), and at I, the median increase was 50% (I-left/-right = +2.66/+2.62 mm). The original denture size influenced the volume increase (P = 0.024): smaller dentures led to a larger increase. The amount of denture increase did not have negative impact on either self-perceived oral function or patient satisfaction. Approximately, 95% of the patients were satisfied with the treatment results.


The lingual size of a lower denture was enlarged by the integration of a prefabricated bar without any negative side effects. Thus, this attachment system is suitable to convert an existing full denture into an implant-supported overdenture.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology

UniBE Contributor:

Albrecht, Dominic, Kremer Hovinga, Urs, Katsoulis, Joannis, Mericske, Regina, Enkling, Norbert


600 Technology > 610 Medicine & health








Eveline Carmen Schuler

Date Deposited:

29 Mar 2016 09:37

Last Modified:

05 Dec 2022 14:52

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

immediate loading, implant attachment, overdenture, patient satisfaction, prefabricated implant bar, space requirement, stress-free implant bar




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