Dental OSCE (Objective Structured Clinical Examination) Practice Exam

What is a significant disadvantage of a resin-bonded denture, such as a Maryland bridge?

1. Discoloration of resin

2. Debonding

3. Pain during function

4. High manufacturing cost

The correct answer is: Debonding

The significant disadvantage of a resin-bonded denture, such as a Maryland bridge, lies in the risk of debonding. This occurs when the adhesive that secures the resin-bonded framework to the natural teeth fails, which can be due to various factors like occlusal forces, improper bonding technique, or the presence of saliva during placement. When debonding happens, the prosthetic may come loose or fall out, which not only compromises the integrity of the restoration but also can cause patient discomfort and dissatisfaction. In contrast, while discoloration of resin can be an issue, advancements in materials have minimized this problem. Pain during function can arise from various factors but isn't inherently associated with the design of a resin-bonded bridge. The manufacturing costs of resin-bonded dentures can also be lower compared to other types of fixed prostheses, especially when considering the time and materials needed for fabrication. Therefore, the risk of debonding is particularly significant because it directly affects the longevity and functionality of the dental restoration.