References
M John Novak, Karen F Novak. Chronic Periodontitis. In: Newman M, Takei H, Klokkevold P, Carranza F. Clinical Periodontology. 11th ed. New Delhi: Elsevier; 2011. Pp. 207-11.
Hujoel PP, Leroux BG, DeRouen TA, Powell LV, Kiyak HA. Evaluating the validity of probing attachment loss as a surrogate for tooth mortality is a clinical trial on the elderly. J Dent Res. 1997;76:858-66.
Hujoel PP. Endpoints in periodontal trials: The need for an evidence-based research approach. Periodontol 2000. 2004;36:196-204.
Gottlieb B. The formation of the pocket: diffuses atrophy of alveolar bone. J Am Dent Assoc. 1928;5:462-76.
Goodson JM. Clinical measurements of periodontitis. J Clin Periodontol. 1986;13:446-60.
Churruca K, Pomare C, Ellis LA, et al. Patient-reported outcome measures (PROMs): A review of generic and condition-specific measures and a discussion of trends and issues. Health Expect. 2021;24(4):1015-24.
