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My presentation maxilary premolar
 

My presentation maxilary premolar

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    My presentation maxilary premolar My presentation maxilary premolar Presentation Transcript

    • PERMANENT MAXILLARY SECOND PRE-MOLAR By Kanwal Fatima BDS 2ndyear
    • CONTENTS 1) 2) 3) 4) • • • General characteristics. Tooth numbering. Chronology Description tooth aspects: Buccal aspect Lingual aspect Root.
    • • It is the 5th tooth of the maxillary arch in permanent dentition. • It can not be seen in primary dentition. • It supports the first pre-molar in function. • It resembles closely to the first pre-molar. • Its less angular than first pre-molar. • It gives rounded effect to the crown from all aspect
    • • Single rooted. • Crown of 2nd pre-molar is smaller cervico occlusally and mesio-distally. • Root is longer than 1st pre-molar. • Both the teeth are about same length but the 2nd pre-molar is greater in length.
    • • According to the universal tooth numbering system its number is: • Maxillary right is tooth # 4. • Maxillary left is tooth # 13. • Mandibular left is tooth # 20 • Mandibular right is tooth # 29.
    • • According to FDI system the tooth numbers are: • Maxillary right is tooth # 15. • Maxillary left is tooth # 25. • Mandibular right is tooth 45 #. • Mandibular left is tooth 35#.
    • First evidence of calcification = 2 – 2.5 yr Enamel completed = 6 – 7 yr Eruption 10 – 12 yr Root completed 12 – 14 yr
    • • Buccal cusp is not long as of first pre-molar. • Buccal cusp is less pointed. • Mesial slope of buccal cusp ridge is shorter than distal slope. • The crown and root from this aspect are thicker at their cervical portions
    • • Buccal ridge may not be prominent as that of first pre-molar.
    • • Lingual aspect shows little variations. • Lingual cusp is more or less the same size as buccal cusp. • The root from this side is tilted mesially.
    • • Maxillary 2nd pre-molar has 1 root, which is usually as long or a millimeter longer than the root of 1st pre-molar.
    • • Internet • Wheeler’s dental anatomy.