title: Prevalence of Cervical Enamel Projection and Its Impact on Furcation Involvement in Mandibular Molars: A Cone-Beam Computed Tomography Study in Koreans.
abstract: This study evaluated the prevalence of cervical enamel projections (CEPs) in mandibular molars, and analyzed the correlation between CEPs and furcation involvement (FI) based on cone-beam computed tomography (CBCT) data in a Korean population. CBCT images obtained from March 2012 to August 2012 were analyzed. CEPs and FI on the buccal and lingual surface were classified in three-dimensionally reconstructed images and cross-sectional views, and the correlation between these two parameters was analyzed. In total, 982 teeth in 425 patients were analyzed. The overall prevalence rate of CEPs was 76% (71% and 27% on the buccal and lingual surfaces, respectively). Grade I CEPs were the most common, followed by CEPs of grades II and III. There was a statistically significant, but negligible correlation between the CEP grade and the degree of FI on the buccal and lingual surfaces. Within the limitations of this cross-sectional study, a high prevalence of CEPs were found in a Korean population, but the role of CEPs in provoking FI appeared not to be decisive.
authors.affiliation: Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, South Korea.
authors.forename: Hyun-Chang
authors.initials: HC
authors.lastname: Lim
authors.affiliation: Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.
authors.forename: Seok-Kyun
authors.initials: SK
authors.lastname: Jeon
authors.affiliation: Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.
authors.forename: Jae-Kook
authors.initials: JK
authors.lastname: Cha
authors.affiliation: Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.
authors.forename: Jung-Seok
authors.initials: JS
authors.lastname: Lee
authors.affiliation: Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.
authors.forename: Seong-Ho
authors.initials: SH
authors.lastname: Choi
authors.affiliation: Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea.
authors.forename: Ui-Won
authors.initials: UW
authors.lastname: Jung
mesh_terms: D000328:Adult; D000368:Aged; D063405:Anatomic Variation; D044466:Asian People; D054893:Cone-Beam Computed Tomography; D003430:Cross-Sectional Studies; D003743:Dental Enamel / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D005260:Female; D017823:Furcation Defects / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D056910:Republic of Korea; D055815:Young Adult
keywords: cone-beam computed tomography; dental enamel; furcation defects; prevalence; tooth cervix