What factor is NOT considered in the success of Phase I therapy?

Phase I therapy in periodontal treatment primarily focuses on the elimination of etiological factors contributing to periodontal disease, such as plaque control and calculus removal, rather than directly addressing structural or anatomical concerns. Among the listed factors, bone quality is not typically a direct concern during the initial phase of therapy. Phase I aims to create a healthy periodontal environment through non-surgical interventions; thus, it does not specifically evaluate the quality of bone.

In contrast, factors like root irregularities, depth of pockets, and presence of furcations are key concerns in evaluating and diagnosing periodontal disease. These elements directly affect the overall treatment plan and can guide the clinician in determining the necessary interventions following Phase I therapy. Understanding that bone quality is more relevant in subsequent phases of treatment or surgical planning helps clarify why it is not considered a factor in the immediate success of Phase I therapy.