When a lateral incisor is lost in a patient with Class II Division II and deep bite, which option is contraindicated?

The contraindication of using a fixed bridge with the canine and central incisor as abutments in a patient with Class II Division II occlusion and a deep bite can be attributed to multiple factors related to biomechanics and occlusal considerations.

In Class II Division II malocclusion, the anterior teeth are typically retroclined, and the deep bite indicates that the maxillary incisors significantly overlap the mandibular incisors. This relationship can result in increased stress and forces on the abutments due to the altered occlusal dynamics when a lateral incisor is lost. Utilizing a fixed bridge supported by the canine and central incisor can lead to excessive load on these teeth, which may not be structurally sound or appropriate for long-term stability, given the occlusal challenges present in this case.

Additionally, the canine and central incisor may not provide adequate support given their position and angulation in a deep bite scenario, leading to potential periodontal issues or failure of the bridge due to compromised occlusion. The overall treatment plan must consider the prognosis of the remaining teeth, managing occlusion carefully to avoid exacerbating the existing malocclusion.

In contrast, other options like non-rigid connectors, removable partial dentures, or immediate dentures involve more flexibility