Clinical and Statistical Study on Treatment
Effects on Periodontal Surgery in Adult
Periodontitis Patients
Masashi MURATA, Kazuhiro OKUDA, Manabu MOMOSE,
Takashi NOMURA, Chung-Hsien WU and Kohji HARA
Department of Periodontology, Niigata University,
School of Dentistry (Chief: Prof. Kohji HARA)
*Graduate Institute of Oral Rehabilitation, Taipei Medical College
(Dean: Associate Prof. Sheng-Yang LEE)

Abstract: This study was carried out to ascertain and analyse the conditions of total 213 cases who had undergone periodontal surgery in periodontal clinic, Niigata University Dental Hospital during April, 1996 to March, 1997. As regards the classification of operations, there were 201 flap operation (FOP) cases, 6 mucogingival surgery (MGS) cases, 4 apicoectomy cases and 2 other operations including guided bone regeneration (GBR) and autogenous tooth implantation. Among these cases, 184 teeth in 111 periodontitis patients who had undergone FOP alone were selected to evaluate the clinical effectivenes of FOP. After completion of the initial treatment (baseline), the probing pocket depth (PPD) and clinincal attachment level (CAL) were clinically assessed at 6 months and 1 year postsurgery. As the result, a positive correlation was found between PPD at baielime, and both PPD reduction and CAL gain (p < 0.05). The correlation efficients after FOP were larger than those after initial treatment prior to FOP (p < 0.05).
        Six month and 1 year follow-up results after FOP were as follows:
        1) PPD reduction of both anteriors and premolars and molars at 6 months and 1 year postsurgery showed a significant improvement compared with baseline measurements: anteriors and premolars vs molars; l.9+-1.2mm vs 3.3+-1.0mm (6M), l.9+-1.1mm vs 3.0+1.3mm (1Y).
        2) There was also a significant improvement in CAL gain of both anteriors and premolars, and molar at 6 months and 1 year postsurgery compared with baseline: anteriors and premolars vs molars; 1.0+-1.2mm vs 1.0+-1.4mm (6M), 1.0+-1.2mm vs 1.5+-1.7mm (1Y).
        These results suggested that periodontal surgery following scaling and root planing was more effective in advanced periodontitis with deeper pockets.

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