Final answer:
The Mandibular right lateral incisor is most at risk for mucogingival involvement due to the anatomical position and typically thinner gingiva in the lower jaw.
Step-by-step explanation:
The teeth most prone to mucogingival involvement, which refers to problems affecting the mucous membrane and the gingiva (gums) surrounding the teeth, are typically the mandibular incisors due to their anatomical position and the typically thinner gingiva in that region. Given the options provided, the Mandibular right lateral incisor is most at risk. This is because it is located in the lower jaw where the bone and soft tissue are less robust compared to the upper jaw, leading to potential for gingival recession and mucogingival issues more easily.
In the arrangement of teeth, the incisors are followed by the cuspids, or canines, then the premolars (or bicuspids), and finally the molars, which include the wisdom teeth at the back of the mouth. The mandibular incisors have less attached gingiva, which makes them more susceptible to recession and mucogingival problems, particularly if there are issues like aggressive brushing or periodontal disease.