Permanent maxillary second premolars

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Permanent maxillary second premolars

  1. 1.      Supplements the maxillary first premolar in function Less angular ,rounded crown in all aspects Single root Smaller crown cervicoocclusally Root length is as great or greater
  2. 2. Not as long as that of the first premolar  Less pointed  Mesial slope is shorter than the distal slope  Buccal ridge of the crown may not be so prominent when compared with the first premolar 
  3. 3.  Lingual cusp is longer making the crown longer on the lingual side
  4. 4. Cusps of second premolar are shorter with the buccal and lingual cusps more nearly the same length  Greater distance between cusp tips-that widens the occlusal surface buccolingually  No developmental depression on the mesial surface of the crown as on the first premolar  Crown surface is convex instead  No deep dev. Groove crossing the mesial marginal ridge 
  5. 5. Outline of the crown is more rounded or oval rather than angular  Central dev. groove is shorter and more irregular  Tendency toward multiple supplementary grooves radiating from the central groove that may extend out to the cusp ridges  Makes for an irregular occlusal surface and gives a very wrinkled appearance 

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