Longevity of two-unit cantilevered resin-bonded fixed partial dentures

Area of Science:

• Dental prosthetics
• Fixed prosthodontics
• Biomaterials in dentistry

Background:

• Resin-bonded fixed partial dentures (RBFPDs) are a conservative treatment option for replacing missing teeth.
• Cantilevered designs, particularly two-unit configurations, present unique clinical considerations.
• Evaluating long-term clinical performance is crucial for understanding the success of RBFPDs.

Purpose of the Study:

• To assess the clinical performance and patient satisfaction of two-unit cantilevered resin-bonded fixed partial dentures.
• To determine the retention rate and identify factors influencing the longevity of these prostheses.
• To provide data on the clinical outcomes of RBFPDs placed by students and staff.

Main Methods:

• Retrospective review of 130 patients who received two-unit cantilevered RBFPDs.
• Clinical examination recording prosthesis status, abutment/pontic contacts, and interproximal contacts.
• Data collection on debonding events, subsequent treatments, and patient-reported satisfaction.

Main Results:

• 82 prostheses were evaluated, with a mean service life of 36.7 months (range 4.3-95.4 months).
• A high clinical retention rate of 95.1% was observed, with only four prostheses debonding.
• No instances of rotation, drifting, or tipping were noted; patient satisfaction was rated highly (average 8.2/10).

Conclusions:

• Two-unit cantilevered resin-bonded fixed partial dentures exhibit favorable clinical performance and high patient satisfaction.
• These prostheses demonstrate excellent retention and stability, making them a viable treatment option.
• The findings support the use of RBFPDs in clinical practice, particularly when placed by trained dental professionals.