Which of the following are primary factors in deciding between a fixed bridge and an implant-supported crown for a posterior tooth?

• A. Color of adjacent teeth.
• B. Remaining tooth structure/condition, bone availability, occlusion, esthetics, patient preference, and cost/maintenance.
• C. Patient's favorite color.
• D. Distance from the palate.

Answer: (B)

Choosing between a fixed bridge and an implant-supported crown in a posterior tooth depends on several interrelated clinical and patient-centered factors. The amount and health of the remaining tooth structure are crucial because a fixed bridge relies on adjacent teeth as anchors, which means those teeth must be sound enough to support the restoration. If they are weakened, decayed, or heavily restored, a bridge becomes less favorable and an implant might be preferred, as it preserves neighboring teeth. Bone availability is essential for implants; adequate bone supports a reliable integration and long-term success, whereas insufficient bone may require grafting or could push clinicians toward a bridge. Occlusion matters because the posterior bite involves significant chewing forces, and the restoration must withstand those loads without compromising function or causing bite issues; implants and bridges distribute loads differently and are chosen based on how well they will perform in the patient’s bite. Esthetics also play a role, even in the back region, since emergence profile and the appearance of the restoration can influence soft tissue health and patient satisfaction, especially if there are esthetic concerns like a visible margin or translucency. Patient preference and cost/maintenance are practical considerations: some patients prefer a less invasive approach or shorter treatment time (often a bridge), while others prioritize tissue preservation and future flexibility (often an implant), and ongoing maintenance costs or potential future procedures affect the long-term decision. Other factors like the color of adjacent teeth or distance from the palate exist but are not primary determinants compared with the factors above.