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Mini-Implants for Mandibular Overdentures: Cost-Effectiveness Analysis alongside a Randomized Trial.

M P Della Vecchia1, C R Leles2, T R Cunha1

  • 11 Department of Dental Materials and Prosthetics, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.

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Summary

Mandibular overdentures using mini-implants are less costly than traditional 2-implant options. While 2 mini-implants offer significant cost savings, 4 mini-implants provide better patient outcomes with reduced costs compared to standard implants.

Keywords:
complete denturecosts and cost analysisdental implantsedentulous/edentulismminimally invasive surgical proceduresremovable prosthodontics

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Area of Science:

  • Dental Implantology
  • Prosthodontics
  • Health Economics

Background:

  • Conventional 2-implant retained mandibular overdentures are standard care for edentulism.
  • High costs and discomfort associated with conventional implants limit patient acceptance.
  • Mini-implants offer a potentially lower-cost, less invasive alternative.

Purpose of the Study:

  • To compare treatment costs and cost-effectiveness of mini-implants versus standard implants for mandibular overdentures.
  • To evaluate patient-reported outcomes including Oral Health Impact Profile for Edentulous (OHIP-EDENT) scores and denture satisfaction.

Main Methods:

  • Randomized clinical trial involving 120 edentulous participants.
  • Three groups: 4 mini-implants, 2 mini-implants, or 2 standard implants for overdenture retention.
  • Evaluation of treatment costs and patient outcomes after 6 months; calculation of Incremental Cost-Effectiveness Ratios (ICERs).

Main Results:

  • Overall treatment costs were lowest for 2 mini-implants (US$318.08), followed by 4 mini-implants (US$510.75), and 2 standard implants (US$566.13).
  • No significant differences in unscheduled appointments or participant time spent.
  • Four mini-implants showed improved patient-reported outcomes and reduced costs compared to standard implants.

Conclusions:

  • Mandibular overdentures retained by 2 or 4 mini-implants are less costly than those retained by 2 standard implants.
  • Two mini-implants provide substantial resource savings.
  • Four mini-implants offer superior patient outcomes and cost reduction compared to standard implants, enhancing accessibility.