Figure 1. Outline of a longitudinal section of a mouse mandibular first molar tooth:

• crown dentin (a), superior to the axis of cemento-enamel junctions (J, J') and enclosed by the dentino-enamel junction (JEJ') (enamel removed by decalcification) and the dentin-pulp interface (PP').
  
• crown pulp (b), inferior to crown dentin (a) and superior to the axis of the cemento-enamel junctions (JJ');
  
• apical cellular cementum (c), outline;
  
• dorsal root dentin (d), inferior to the cemento-enamel junction axis (JP) and enclosed by the dentino-cemental junction (JA) and the dentin-pulp interface (PA);
  
• mesial root dentin (e), inferior to the cemento-enamel junction axis (P'J') and enclosed by the dentino-cemental junction (J'A') and the dentin-pulp interface (P'A'); and
  
• root dentin of the furcation (f), outline.
  

Scale bar = 0.50 mm.