title: Thickness of cementum/dentin in mesial roots of mandibular first molars.
abstract: The mesial roots of 15 human first lower molars, along with the corresponding half of the tooth crown, were studied to determine the thickness of dentin-cementum. A device was developed whereby these could be embedded in resin with a precisely known orientation in space. The roots were radiographed in mesiodistal and vestibular-lingual projections, then sectioned perpendicular to the canal axis in the coronal third. Thickness of dentin-cementum was compared on sections and radiograms; results showed that the amount of hard tissue is effectively about one fifth less than that appearing on the radiogram.
authors.affiliation: School of Dentistry, Turin University, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Berutti
authors.forename: G
authors.initials: G
authors.lastname: Fedon
mesh_terms: D003720:Densitometry; D003739:Dental Cementum / Q000033:anatomy & histology*; D003804:Dentin / Q000033:anatomy & histology*; D006801:Humans; D008334:Mandible; D008963:Molar / Q000033:anatomy & histology*; D009811:Odontometry; D012016:Reference Values; D014092:Tooth Root / Q000033:anatomy & histology*