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UBC Theses and Dissertations

Treatment outcome of the graduate periodontics clinic at the University of British Columbia : short term and long term results Irinakis, Anastasios Tassos


The active treatment and maintenance for 100 periodontal patients (2,512 teeth) in the graduate periodontics clinic at the University of British Columbia was surveyed. All patients were in maintenance for at least 2 years and had an average duration of maintenance of 5.2 years. A subgroup of patients that were maintained for an average of 11 years was also investigated (19 patients). Patients and teeth were evaluated separately in order to determine the effectiveness of our treatment and maintenance program in terms of probing depth (PD) reduction, attachment level (AL) changes and tooth loss. Pockets were further divided into moderate (4-6 mm) and deep (Si7 mm), while teeth were grouped into molars and nonmolars. Additionally, prognosis of individual teeth and their long-term survivability were investigated. It was found that PD improved significantly during active therapy for all pockets, i.e. 2.1 mm in deep pockets and 0.7 mm in moderate pockets. This improvement continued for the duration of maintenance. Attachment levels improved during initial treatment but slightly deteriorated during maintenance. However, clinically all attachment levels were stable for the duration of our study. Smokers showed similar initial attachment gain and probing depth improvement with nonsmokers. During maintenance though, both AL and PD measurements were better for nonsmokers. Smoking didn't result in significantly greater tooth loss compared to nonsmoking patients in our study. Furthermore, if a patient was assigned in the severe periodontitis group it was likely that he/she would show a better response in PD reduction (1.38 mm vs. 0.34 mm; p

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