Which tooth is likely to fail after periodontal treatment?

The maxillary first molar is likely to fail after periodontal treatment due to several factors associated with its anatomical structure and periodontal susceptibility. This particular tooth typically has multiple roots and canals, making it more complex and more difficult to maintain periodontal health compared to single-rooted teeth such as the mandibular canine.

In a periodontal context, the maxillary first molar often experiences a higher incidence of furcation involvement, which is the area where the roots bifurcate. When periodontal disease affects these areas, it can be challenging to treat effectively, and maintaining periodontal stability can become complicated. The greater number of roots also means that there is a larger surface area that could be affected by bacterial accumulation, leading to inflammation and tissue loss.

Furthermore, the maxillary first molar is subjected to significant functional forces due to its role in mastication. This mechanical stress, combined with existing periodontal issues, can contribute to tooth mobility and eventual failure even after treatment. During the healing phase post-treatment, the ability of the periodontal tissues to reattach and stabilize may be compromised in such multi-rooted teeth, increasing the risk of failure compared to other tooth types, like the mandibular canine or incisors, which do not experience the same level of complexity in their treatment and