Patient accessibility to supportive periodontal therapy and the occurrence of recurrent periodontitis: a retrospective study in the Faculty of Dentistry, Mahidol University

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Amphon Waithongkam
Penpan Laohapand
Thitiwan Teparat-Burana


Objective: To describe patient accessibility to supportive periodontal therapy (SPT) and the occurrence of recurrent periodontitis in SPT patients.

Material and Methods: Retrospective data were collected from the patients’ medical records who had
completed active periodontal therapy (APT) from August 2011 to July 2013 at the Postgraduate Periodontal Clinic, Faculty of Dentistry, Mahidol University.

Results: Ninety-nine patients were included in the study and 68 were registered to enroll for SPT. Among these, 45 patients had attended at least one SPT appointment. By the end of the observation period the total number of SPT appointments for these patients was 84. Only 20 appointments were concordant with the suggested SPT interval, while the remainder were between 2 and 8 months behind schedule. Most of the patients (87.9%) who attended SPT were classified as unstable cases at the end of the APT, with 73.3% having recurrent periodontitis.

Conclusions: The majority of the registered patients attended their SPT appointments that were mainly not in concordance with the suggested time intervals. A high occurrence of recurrent periodontitis was reported among these SPT patients. The SPT service at the clinic needs to be completely overhauled and revised to improve efficiency and reduce the risk of recurrent periodontitis.


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Waithongkam A, Laohapand P, Teparat-Burana T. Patient accessibility to supportive periodontal therapy and the occurrence of recurrent periodontitis: a retrospective study in the Faculty of Dentistry, Mahidol University. M Dent J [Internet]. 2022 Jun. 18 [cited 2023 Dec. 5];42(2):109-18. Available from:
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