Implant supported overdentures--the Leuven experience

Area of Science:

• Dental Implantology
• Prosthodontics
• Oral Rehabilitation

Background:

• Overdenture therapy is a common treatment for edentulism.
• Implant-supported overdentures aim to improve stability and function compared to conventional dentures.

Purpose of the Study:

• To evaluate the long-term outcomes of resilient overdenture therapy using two implants in the mandible and four implants in the maxilla.
• To assess implant survival, marginal bone stability, and patient satisfaction.

Main Methods:

• Three longitudinal clinical studies were conducted.
• Mandibular overdentures were retained by two implants, and maxillary overdentures by four implants.
• Resilient attachment systems and rigidly cast bars (for maxilla) were utilized.

Main Results:

• The mandibular two-implant overdenture demonstrated high reliability with low implant failure rates and improving implant stability over time.
• Marginal bone levels remained stable after the first year in both arches.
• Maxillary implants, when rigidly splinted, maintained marginal bone levels in resilient overdenture therapy.
• Patient satisfaction was consistently high.

Conclusions:

• Resilient mandibular bar-retained overdentures on two implants are a highly reliable and cost-effective treatment option.
• Rigid splinting of maxillary implants is crucial for maintaining marginal bone in overdenture therapy.
• Proper laboratory fabrication and routine clinical aftercare are essential for successful outcomes.
• This overdenture design is simple, versatile, and leads to high patient satisfaction.