TY - JOUR ID - 89539 TI - A comparative evaluation of periodontal parameters and oral health in the twins of Khorasan Province, Iran JO - Journal of Oral Health and Oral Epidemiology JA - JOHOE LA - en SN - AU - Fatemi, Kazem AU - Chavoshi, Amirhossein AU - Banihashemrad, Seyed Ahmad AU - Ghodsi, Kazem AU - Rezaee, Mohammad Esmaeel AU - Javan-Rashidi, Abdollah AU - Banihashemrad, Seyed Ali AD - Associate Professor, Department of Periodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran AD - Student of Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran AD - Assistant Professor, Department of Human Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran AD - School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran AD - Department of Biostatistics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran Y1 - 2019 PY - 2019 VL - 8 IS - 4 SP - 167 EP - 172 KW - Bleeding on Probing KW - Periodontal disease KW - Twins DO - 10.22122/johoe.v8i4.318 N2 - BACKGROUND AND AIM: Several risk factors contribute to periodontal diseases. Studying twins has helped increase our knowledge on the roles of genetic and environmental factors in periodontal diseases. The objective of this study was the evaluation of periodontal parameters in the twins of Khorasan Province, Iran. METHODS: This study was carried out on 30 pairs of twins between 12-35 years old including 12 pairs of monozygotic (MZ) twins and 18 pairs of dizygotic (DZ) twins with the average age of 18 years old. Periodontal parameters studied consisted of: probing pocket depth (PPD), clinical attachment level (CAL), and bleeding on probing (BOP). Analyses were conducted through SPSS software. T-test was used to examine the differences between MZ and DZ twins also between first twin and second twin. Significance level was set at 0.05. RESULTS: The amounts of PPD (P = 0.045) and CAL (P = 0.003) were significantly different between MZ and DZ twins, while no significant difference in BOP (P = 0.474) was observed between the two groups. Studying heritability showed that BOP could be affected by environmental factors (h2 = 0.41), while CAL and PPD were affected by genetic factors (h2 = -0.70 and h2 = -0.61, respectively). CONCLUSION: Our study confirms previous studies which had focused on the role of genetic factors in periodontal diseases. It indicates that in twins, PPD and CAL are mostly affected by genetic factors, while BOP is mainly affected by environmental factors. UR - https://johoe.kmu.ac.ir/article_89539.html L1 - https://johoe.kmu.ac.ir/article_89539_ed3110865602cbb9b51f9334b1a1b584.pdf ER -