[Mesiodistal inclination of permanent 2d molars Angles of bite]

Measurement of the angles formed by the axes of the second permanent molars on the plane of bite in premolar sector was carried out by profile teleradiographies of 50 young adults. These patients showed no abnormality likely to affect the molar alveolar processes in the saggital plane. The results were as follows: Open angle in front of the second upper molar with plane of bite:80degres. Open angle in front of the second lowermolar with plane of bite: 110degrees. Angle of bite of the second molars: 170degrees, identical with the angle of bite of the first molars.