Über den Autor

PD Dr. med. dent. Tim Joda, DMD, MSc

University of Bern, School of Dental Medicine Bern
Freiburgstrasse 7
CH-3010 Bern
+41 (0)31 632-9994


Master of Science in Prosthodontics & Biomaterials (University of Greifswald)
Specialist in Prosthodontics (DGPro + EPA) | Specialist in Periodontology (DGP) | Specialist in Implantology (DGI)

  • Since 01/2016: Director, Postgraduate Education Program at the Department of Reconstructive Dentistry and Gerodontology, University of Bern, Switzerland
  • Since 06/2015: Head, Section for Digital Reconstructive Technology + Implant Dentistry [DiRecT+ID], University of Bern, Switzerland
  • Since 08/2014: Assistant Professor, Department of Reconstructive Dentistry and Gerodontology, University of Bern, Switzerland (Prof. Dr. U. Bragger)
  • 01/2014–03/2014: Visiting Assistant Professor, Division of Implant Dentistry, Harvard School of Dental Medicine, Boston, USA (Prof. Dr. G.O. Gallucci, DMD, PhD)
  • 04/2012–07/2014: Assistant Professor, Division of Fixed Prosthodontics, University of Bern, Switzerland (Prof. Dr. U. Bragger)
  • 11/2011–03/2012: Senior Research Fellow, International Team for Implantology (ITI-Scholar), Division of Fixed Prosthodontics, University of Bern, Switzerland (Prof. Dr. U. Bragger)
  • 10/2008–09/2011: Clinical Associate Professor, Department of Prosthodontics & Implant Dentistry, University of Hamburg, Germany (Prof. Dr. G. Heydecke)
  • 03/2008–04/2008: Research Fellow, Department of Periodontology & Implant Dentistry, Tufts University Boston, USA (T.J. Griffin, DMD)
  • 10/2005–09/2008: Postgraduate Program, Department of Periodontology & Implant Therapy, University of Munster, Germany (Prof. Dr. T.F. Flemmig & Prof. Dr. B. Ehmke)
  • 01/2005–09/2005: General Dentist, Private Dental Clinic, St. Gallen, Switzerland (L. Bengtson, DDS)
  • 01/2004–12/2004: Postgraduate Program, Department of Prosthodontics, University of Munster, Germany (Prof. Dr. Dr. F. Bollmann)
  • 09/1998–12/2003: Undergraduate Dental Education, Center for Dental & Oral Medicine, University of Munster, German
  • Elective, University-Hospital Charité Berlin, Germany (Prof. Dr. mult. J. Bier)
  • Elective, University-Hospital Zurich, Switzerland (Prof. Dr. Dr. K. Graetz)
  • 2016 Habilitation ‘Private-Docent – Venia Docendi’ [PhD] (University of Bern), Specialization in Dental and Maxillofacial Prosthodontics (EPA)
  • 2012 Master of Science in Prosthodontics & Biomaterials [MSc] (University of Greifswald) [Graduation with Honors]
  • 2011 Specialization in Implantology (DGI)
  • 2010 Specialization in Prosthodontics (DGPro)
  • 2009 Specialization in Periodontology (DGP)
  • 2008 Certification in Periodontology & Implant Therapy (ZÄK WL)
  • 2004 Dr. med. dent. ‘Inaugural Dissertation’ (University of Munster)
  • 2003 Dental Medical Doctor (University of Munster) [Graduation with Honors]


  • Honorary Associate Professor – University of Siena, Italy 2016
  • Research Prize Award SGI – Swiss Society of Implantology 2013
  • Research Prize Award SSRD – Swiss Society of Reconstructive Dentistry 2013


German Boards of General Dentistry (DGZMK), Implantology (DGI), Prosthodontics (DGPro), and Periodontology (DGP), Board Member of Directors Digital Dentistry Society (DDS), International Academy for Digital Dental Medicine (IADDM), European Association of Osseointegration (EAO), European Prosthodontic Association (EPA), International College of Prosthodontics (ICP), Fellow & Study-Club Director International Team for Implantology (ITI), Associate Fellow Greater New Yorker Academy of Prosthodontics (GNYAP)


Ferrari M, Bragger U

A prospective clinical cohort study analysing single-unit implant crowns after 3 years of loading: Introduction of a novel Functional Implant Prosthodontic Score (FIPS)



Several clinical indices have been developed to assess the esthetic appearance of implant crowns. However, no functionally based score for implant crowns has been established yet.


The aim of this prospective clinical cohort study was to validate implant crowns with a novel Functional Implant Prosthodontic Score (FIPS).

Material & methods

Twenty patients were restored with cement-retained implant crowns in posterior sites and annually followed up for three years. FIPS was applied for the objective outcome assessment including clinical and radiographic examinations. FIPS is defined by five variables: (1) interproximal, (2) occlusion, (3) design, (4) mucosa, and (5) bone (Fig. 1, Fig. 2). A scoring scheme of 0-1-2 is assigned for each variable, resulting in a maximum score of 10 (5 x 2) per implant restoration (Tab. 1). Patient satisfaction was supplementary analysed with a shortcut questionnaire including a visual analogue scale (VAS) ranged from „unsatisfied“ to „fully satisfied“ (0-100). The patients could separately mark on calibrated horizontal 0-10 cm lines expressing their personal degree of satisfaction. A linear regression analysis was performed for the detection of significant correlations between the total FIPS scores and the subjective results of the patients’ VAS response. A level of significance was set at p < 0.05.


All implants and corresponding crowns showed survival rates of 100% without any biological or technical complications after three years of loading. The mean total FIPS score was 7.8 ± 1.5 (range: 6-10). The variable bone revealed the highest scores (2.0 ± 0.0; range: 2-2), followed by occlusion (1.9 ± 0.1; range: 1-2). Mean scores for design (1.2 ± 0.6; range: 0-2), mucosa (1.3 ± 0.7; range: 0-2), and interproximal (1.4 ± 0.4; range: 1-2) were more challenging to satisfy. The patients expressed a high level of functional satisfaction (84.1 ± 9.5; range: 68-100). A significant correlation was found between FIPS and the patients’ subjective perception with a coefficient of 0.88 (p < 0.0001; Fig. 3).


The findings of the clinical trial indicated the potential of FIPS as an objective and reliable instrument in assessing implant success. FIPS can be considered as a supportive tool to validate a satisfactory outcome as perceived by patients, to identify possible risks for failure, and to compare outcomes of follow-up observations.