Australian Dental Council (ADC) Practice Test

The primary consideration when planning the restoration of a Class II cavity is functionality and retention. Class II cavities, which typically affect the interproximal surfaces of posterior teeth, require careful attention to ensure that the restoration is not only securely retained but also able to withstand the forces of occlusion during chewing.

Functional considerations involve assessing how the restoration will interact with adjacent teeth and how it will contribute to the overall function of the dental arch. Properly restoring the contact points between adjacent teeth is crucial for maintaining natural occlusion and preventing food impaction. Retention is also key, as a restoration that is not properly retained may fail over time, leading to recurrent decay or the need for retreatment.

While aesthetic outcomes, cost of materials, and the patient's overall health are important factors in the decision-making process, the primary focus for Class II restorations remains on ensuring that the restoration meets functional demands and can be effectively retained within the tooth structure. This foundational aspect helps in achieving long-lasting and effective restorations.