National Dental Examining Board of Canada (NDEB) Practice Exam 2026 - Free NDEB Practice Questions and Study Guide

Juvenile periodontitis is the more serious condition of the two options, with a worse prognosis. This is because it occurs in children and adolescents, which means it has a longer time to progress and cause greater damage to the gums and teeth. Moderate periodontitis, on the other hand, typically occurs in adults and while it is still a serious condition, it may not progress as rapidly or severely as juvenile periodontitis. Additionally, there is not enough information provided to compare the two options, so option D of "cannot be determined" is not valid. Option C, which states that both have similar prognoses, is also incorrect because juvenile periodontitis is known to have a worse prognosis than moderate periodontitis.