Clinical usability of aspartate aminotransferase to evaluate the prognosis of periodontal regeneration therapies: prospective, longitudinal study
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To evaluate the degree of periodontal tissue destruction, aspartate aminotransferase (AST) levels in the gingival crevicular fluid (GCF) are utilized as a predictor of periodontal therapy. We have previously shown that the usefulness of AST activities [periodontal tissue monitor (PTM) values] using a PTM-kit to evaluate the effects of initial periodontal therapy and periodontal regeneration therapy by enamel matrix derivative (EMD). This prospective, longitudinal study was conducted using 38 healthy and 80 periodontitis sites with probing depth (PD) of 5–10 mm for guided tissue regeneration (GTR) and EMD from 36 patients. GCF samples were used to evaluate PTM values at base line (BL) and after 6 months of surgeries (re-evaluation: RE), and periodontal examinations were performed concurrently. PTM values at BL were statistically improved at RE, accompanied by the improvement of periodontal parameters in both groups. PTM values and PD, and the clinical attachment level (CAL) showed high correlations. PD, CAL and bleeding on probing (BOP) were highly correlated with PTM values in both groups, whereas only PD showed a significant correlation with PTM values at RE in the GTR group. Change in the amounts of PD, CAL and BOP between BL and RE in both groups showed no correlation with PTM values. In the negative PTM value sites at BL in EMD group, the mean PD was significantly reduced at RE compared with positive PTM sites at BL. PTM values are able to be utilized as the biochemical predictor of prognosis after periodontal regeneration therapy.
KeywordsAspartate aminotransferase Periodontitis Periodontal regeneration therapy Predictor
The authors report no competing interests. This work was supported in part by the Grant-in-Aid for Scientific Research (Young Scientists (B); No. 25862059, Scientific Research (C); No. 17K11994) from the Ministry of Education, Science, Sports and Culture of Japan, Nihon University Multidisciplinary Research Grant for 2014 and 2017, Nihon University School of Dentistry at Matsudo Young Investigator Seed Funding Grant for 2014, and a grant of Strategic Research Base Development Program for Private Universities from the Ministry of Education, Culture, Sports, Science, and Technology, Japan (MEXT), 2010-2014 (S1001024).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
This study received ethical approval from the ethics committee of Nihon University School of Dentistry at Matsudo, Chiba, Japan [EC12-23]. This is part of our ongoing study to investigate the clinical usefulness of PTM kits for evaluation of post-periodontal surgeries and prognosis after periodontal regeneration therapies, such as GTR and EMD.
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