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132.Occlusal outline of Mandibular 2ndpremolar is Pentagonal (occlusal table- rectangular)133.Premolar that is most likely to have a crescent-shaped central developmental groove - Mandibular 2ndpremolar134.Shortest interdental papilla – between man 2ndpm and 1stmolar135.Y-type mandibular premolar has 1 facial and 2 lingual cusps.136.Y-type Mandibular 2ndpremolar has the same no. of the occlusal pits as the maxillary 1stmolar.137.Mandibular 2ndpremolar – ONLY premolar with multiple lingual cusps138.Mandibular 2ndpremolar – ONLY premolar with a lingual groove139.Mandibular 2ndpremolar – ONLY premolar with central fossa140.The PM that most frequently has a single central pit is the mandibular second 141.MOST congenitally MISSING PREMOLARMolarsMaxillary 1stmolar
142.Occlusal outline form – rhomboidal143.MF and DL angles from the occlusal outline tend to be acute angles144.ML and DF angles from the occlusal outline tend to be obtuse angles.145.The Maxillary 1stmolar tends to taper toward the facial rather than toward the lingual so the buccal embrasure is larger than lingual146.Most prone facial and lingual surfaces of molars are the lingual of maxillary and the facial of mandibular.147.Largest root of Maxillary 1stmolar is Palatal148.Smallest root of Maxillary 1stmolar – distobuccal (MB root-MB2 hence should be bigger)
149.From facial view, apex of lingual root is in line with the facial groove of the tooth150.View from L, in line with the midpoint of MD diameter151.When 4thpulp canal present- MB152.Of 3 furcations of Maxillary 1stmolar- mesial is closest to the cervical line153.Of 3 furcation of Maxillary 1stmolar- distal is the furthest from cervical line Distance of furcations from cervical line- M<B<D154.Oblique ridge of Maxillary 1stmolar forms the distal boundary of the central fossa155.Obtuse corners coincide with the direction of the oblique ridge.(Ml/df)156.Center of the oblique ridge on a maxillary 1stmolar is at the same level with the marginal ridge.157.Oblique ridge connects the ML and DF cusps.158.ML cusp of Maxillary 1stmolar occludes the central fossa of the mandibular molars159.Maxillary 1stmolar has the greatest FL diameter of crown of ALL teeth (think of cusp of carabelli)160.Maxillary 1stmolar closest in size FL vs MD of any MAXILLARY POSTERIORteeth
161.Maxillary 1stmolar has wider M-D width toward the facial than toward thelingual.162.DL cusp of maxillary molar is the only one that is not part of the molar cusp triangle. 163.ML cusp of the Maxillary 1stmolar is its largest and longest cusp.164.Tooth most likely to be forced into max sinus - Maxillary 1stmolar165.Maxillary 1stmolar has a distal concavity that can pose a special problems in matrix placement.166.Crown of Maxillary 1stmolar has a shorter DL groove than the 2ndMolarMaxillary 2ndmolar167.DL cusp is only one that is not a part of the molar cusp triangle168.If DL cusp is not preset = 3 cusp type heart shaped.