Occlusal outline of Mandibular 2 nd premolar is Pentagonal occlusal table

Occlusal outline of mandibular 2 nd premolar is

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132. Occlusal outline of Mandibular 2 nd premolar is Pentagonal (occlusal table- rectangular) 133. Premolar that is most likely to have a crescent-shaped central developmental groove - Mandibular 2 nd premolar 134. Shortest interdental papilla – between man 2 nd pm and 1 st molar 135. Y-type mandibular premolar has 1 facial and 2 lingual cusps. 136. Y-type Mandibular 2 nd premolar has the same no. of the occlusal pits as the maxillary 1 st molar. 137. Mandibular 2 nd premolar – ONLY premolar with multiple lingual cusps 138. Mandibular 2 nd premolar – ONLY premolar with a lingual groove 139. Mandibular 2 nd premolar – ONLY premolar with central fossa 140. The PM that most frequently has a single central pit is the mandibular second 141. MOST congenitally MISSING PREMOLAR Molars Maxillary 1 st molar
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142. Occlusal outline form – rhomboidal 143. MF and DL angles from the occlusal outline tend to be acute angles 144. ML and DF angles from the occlusal outline tend to be obtuse angles. 145. The Maxillary 1 st molar tends to taper toward the facial rather than toward the lingual so the buccal embrasure is larger than lingual 146. Most prone facial and lingual surfaces of molars are the lingual of maxillary and the facial of mandibular. 147. Largest root of Maxillary 1 st molar is Palatal 148. Smallest root of Maxillary 1 st molar – distobuccal (MB root-MB2 hence should be bigger)
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149. From facial view, apex of lingual root is in line with the facial groove of the tooth 150. View from L, in line with the midpoint of MD diameter 151. When 4 th pulp canal present- MB 152. Of 3 furcations of Maxillary 1 st molar- mesial is closest to the cervical line 153. Of 3 furcation of Maxillary 1 st molar- distal is the furthest from cervical line Distance of furcations from cervical line- M<B<D 154. Oblique ridge of Maxillary 1 st molar forms the distal boundary of the central fossa 155. Obtuse corners coincide with the direction of the oblique ridge.(Ml/df) 156. Center of the oblique ridge on a maxillary 1 st molar is at the same level with the marginal ridge. 157. Oblique ridge connects the ML and DF cusps. 158. ML cusp of Maxillary 1 st molar occludes the central fossa of the mandibular molars 159. Maxillary 1 st molar has the greatest FL diameter of crown of ALL teeth (think of cusp of carabelli) 160. Maxillary 1 st molar closest in size FL vs MD of any MAXILLARY POSTERIOR teeth
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161. Maxillary 1 st molar has wider M-D width toward the facial than toward the lingual. 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 1 st molar is its largest and longest cusp. 164. Tooth most likely to be forced into max sinus - Maxillary 1 st molar 165. Maxillary 1 st molar has a distal concavity that can pose a special problems in matrix placement. 166. Crown of Maxillary 1 st molar has a shorter DL groove than the 2 nd Molar Maxillary 2 nd molar 167. DL cusp is only one that is not a part of the molar cusp triangle 168. If DL cusp is not preset = 3 cusp type heart shaped.
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