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Analyzing the predictability of the Kwok and Caton periodontal prognosis system: A retrospective study
Author(s) -
Nguyen Lincoln,
Krish Goutam,
Alsaleh Ahmed,
Mailoa James,
Kapila Yvonne,
Kao Richard T.,
Lin GuoHao
Publication year - 2021
Publication title -
journal of periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.036
H-Index - 156
eISSN - 1943-3670
pISSN - 0022-3492
DOI - 10.1002/jper.20-0411
Subject(s) - medicine , retrospective cohort study , dentistry , survival analysis
Background The aim of this study was to analyze the predictability of the Kwok and Caton periodontal prognosis system by investigating tooth survival within a 64‐month period and to compare this to other well‐established prognosis systems. Methods This retrospective study included the records of patients who had a minimum of two dental exams at least 12 months apart at a single University‐affiliated Dental Center. Data including patients’ age, sex, length of follow‐up period, initial tooth prognosis, revised tooth prognosis, tooth type, and number of teeth lost at the latest exam were recorded. Descriptive analysis was used for data interpretation. Results A total of 4,046 teeth from 174 patients qualified for the study. Teeth with initial poorer prognosis had a higher chance of being extracted compared with those with a better initial prognosis. Tooth survival rate at the latest follow‐up for those with an initial favorable, questionable, unfavorable, and hopeless prognosis was 97.9%, 90.7%, 62.5%, and 17.7%, respectively. Teeth initially assigned to a poorer prognosis category had a higher proportion that changed to a worse prognosis at the latest periodontal exam. Conclusions The Kwok and Caton prognosis system can predictably determine tooth survivability within a 5‐year period. The defined categories of this prognosis system are more reliable than that of other systems in the short‐term. However, long‐term (>5 years) prediction accuracy of this prognosis system needs further investigation.