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Mandibular overdentures supported by two or four endosseous implants. A 5-year prospective study
Anita Visser1, Gerry M Raghoebar, Henny J A Meijer
1Department of Oral and Maxillofacial Surgery and Maxillofacial Prosthodontics, Groningen University Hospital, PO Box 30.001, NL-9700 RB Groningen, the Netherlands. a.visser@kchir.azg.nl
Clinical Oral Implants Research
|January 12, 2005
Summary
This 5-year study found no significant differences in outcomes for mandibular overdentures supported by two or four implants. Patient satisfaction and the condition of peri-implant tissues were comparable between the two implant configurations.
Area of Science:
- Dental Implantology
- Prosthodontics
- Oral Surgery
Background:
- Edentulous patients often require stable and functional prosthetic solutions.
- Mandibular overdentures offer improved stability and function compared to conventional dentures.
- The number of implants supporting an overdenture is a critical factor influencing outcomes.
Purpose of the Study:
- To compare the 5-year treatment outcomes of mandibular overdentures supported by two versus four implants.
- To evaluate survival rates, peri-implant tissue health, patient satisfaction, and aftercare needs.
Main Methods:
- A 5-year prospective comparative study involving 60 edentulous patients.
- Patients were randomized to receive overdentures supported by either two (Group A) or four (Group B) IMZ implants.
- Clinical and radiographic parameters, including peri-implant tissue conditions and patient satisfaction, were assessed annually.
Main Results:
- One implant was lost during the healing period in the two-implant group.
- No significant differences were observed in clinical or radiographic peri-implant tissue parameters between the groups.
- Patient satisfaction was similar, with a trend towards more prosthetic interventions in the two-implant group and soft tissue issues in the four-implant group.
Conclusions:
- Overdentures supported by two or four implants demonstrate comparable clinical and radiographic outcomes over a 5-year period.
- Patient satisfaction is similar regardless of the number of supporting implants.
- The choice between two or four implants may involve considerations for prosthetic interventions and soft tissue management.