What is the greatest disadvantage of resin-bonded bridges?

• A. Staining
• B. Debonding
• C. Fracture
• D. Less tooth reduction

Answer: (B)

The greatest disadvantage of resin-bonded bridges is debonding. This issue arises because resin-bonded bridges rely on adhesive technology to bond to the teeth. The materials used can sometimes fail to maintain a strong bond over time, particularly under occlusal forces or in the presence of moisture and oral bacteria. Debonding can lead to the bridge becoming loose or dislodged, necessitating either repair or replacement. This concern is particularly relevant in patients who may have strong biting forces or have health conditions that affect salivary flow, potentially compromising the integrity of the bond.

While staining, fracture, and less tooth reduction are pertinent considerations in the context of resin-bonded bridges, they do not pose as significant a long-term complication as the risk of debonding. Staining may be an aesthetic issue but doesn't impact the structural viability of the bridge, while fracture is generally less common due to advancements in materials. Less tooth reduction is usually seen as an advantage because it preserves more tooth structure, making debonding the primary concern regarding the longevity and reliability of these dental prosthetics.