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J Dent Res 85(8):717-721, 2006
© 2006 International and American Associations for Dental Research

RESEARCH REPORT
Clinical

A Cost-effectiveness Analysis of Implant Overdentures

N.U. Zitzmann1,*, C.P. Marinello1, and P. Sendi2

1 Clinic for Reconstructive Dentistry and TMJ Disorders, University of Basel, Hebelstr. 3, CH-4056 Basel, Switzerland; and
2 Institute for Clinical Epidemiology, Basel University Hospital, Hebelstr. 10, 3rd Floor, CH-4031 Basel

* corresponding author, N.Zitzmann{at}unibas.ch

Placement of dental implants may improve the retention and stability of complete dentures in edentulous patients. Treatment costs, however, substantially increase with implant treatment. We therefore performed a stochastic cost-effectiveness analysis, comparing implant-supported over-denture prostheses (4 implants), implant-retained overdentures (2 implants), and complete dentures, from the patient’s perspective in Switzerland, to assess whether implant treatment in the mandible represents value for money spent. Twenty patients were included in each treatment group and were followed up for three years. Health outcomes were expressed in Quality-adjusted Prosthesis Years, and dental health care costs and time costs were recorded in year 2000 Swiss Francs (CHF 100 = US$61). The cost per Quality-adjusted Prosthesis Year gained for implant treatment was CHF 9100 (2 implants) and CHF 19,800 (4 implants) over 3 years. Over a ten-year period, these threshold ratios were reduced to CHF 3800 (2 implants) and CHF 7100 (4 implants) per Quality-adjusted Prosthesis Year gained.

KEY WORDS: cost-effectiveness • economic evaluation • dental prosthesis • implant-supported denture • complete denture patient satisfaction






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