Furcation anatomy of the first mandibular molar in dogs

• Published in: American journal of veterinary research Vol. 53; no. 2; p. 242
• Main Authors: Smith, M.M. (Virginia Polytechnic Institute and State University, Blacksburg, VA), Massoudi, L.M, Nunes, J.D, McCain, W.C
• Format: Journal Article
• Language: English
• Published: United States 01.02.1992
• Subjects: AFFECTION BUCCALE; Animals; CHIEN; DENT; DIENTES; DIMENSION; Dogs - anatomy & histology; ENFERMEDADES DE LA BOCA; LARGURA; LONGUEUR; Mandible; Molar - anatomy & histology; PERRO
• ISSN: 0002-9645; 1943-5681
• DOI: 10.2460/ajvr.1992.53.02.242

Tooth surface and interradicular area (furcation) measurements were taken of 20 first mandibular molar teeth obtained randomly from canine cadavers. The lingual furcation entrance had a mean width of 1.2 +/- 0.3 mm. The buccal furcation entrance had a mean width of 1.3 +/- 0.4 mm. There was no significant difference between mean furcation entrance measurements. The horizontal attachment area between the cementoenamel junction and the coronal roof of the lingual furcation was 1.1 +/- 0.4 mm. The horizontal attachment area between the cementoenamel junction and the coronal roof of the buccal furcation (0.5 +/- 0.3 mm) was significantly different from the lingual horizontal attachment area. Distal root length and mesial root length were 16.0 +/- 1.5 mm and 16.1 +/- 1.6 mm, respectively. The mean coefficient of variation for variables measured was 14.0%. Tooth size did not have a significant effect on furcation entrance measurement. All teeth had a concavity coronal to the furcation area, which extended apically for a mean distance of 65.6% of the distal root length and 83.8% of the mesial root length. Furcation anatomy of the first mandibular molar is complex and may be a contributing factor in periodontal disease involving the interradicular area