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Occlusal Contact Points with Mandibular Teeth

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Occlusal Contact Points
 with Mandibular Teeth
   Occlusal Contact Points
with Maxillary Posterior Teeth
  Occlusal Contact Points
with Maxillary Anterior Teeth
Periodontal Ligament Design
       and Function
Periodontal Ligament Design
       and Function


                1
                2
Periodontal Ligament Design
       and Function


                1
                2
  Shape of Proximal
     Contact Areas
Maxillary Premolar Teeth
     Mesial View First Premolar




     Distal View First Premolar
          Tooth Angulation
           First Premolar
                   • Maxillary

•

•   Mesiodistal                  Faciolingual

•

                  • Mandibular
      Tooth Angulation            Central
               Incisor
                  • Maxillary

•

•   Mesiodistal             Faciolingual

•


                  • Mandibular
       Tooth Angulation            Lateral
                Incisor
                  • Maxillary

•

•   Mesiodistal             Faciolingual

•


                  • Mandibular
      Tooth Angulation            Canine

                  • Maxillary

•

•   Mesiodistal             Faciolingual

•


                  • Mandibular
          Occlusal Contact Points
           with Mandibular Teeth

  DL Cusp Third Molar
                           ML Cusp Third Molar
DL Cusp Second Molar
                           ML Cusp Second Molar
   DL Cusp First Molar
                           ML Cusp First Molar
L Cusp Second Premolar
                           L Cusp First Premolar
       Occlusal Contact Points
    with Maxillary Posterior Teeth
 B Cusp First Premolar
                         B Cusp Second Premolar
  MB Cusp First Molar
                         DB Cusp First Molar
   D Cusp First Molar
                         MB Cusp Second Molar
DB Cusp Second Molar
                         MB Cusp Third Molar
 DB Cusp Third Molar
         Occlusal Contact Points
       with Maxillary Anterior Teeth


Incisal Edge Lateral                     Incisal Edge Central


                                         Incisal Edge Lateral
   Cusp Tip Canine


                       Cusp Tip Canine
     Periodontal Ligament Design
            and Function



Alveolar Crest             Transseptal
                           Horizontal
      Oblique               Interradicular


                            Apical
  Periodontal Ligament Design
         and Function

• 1) Alveolar Crest - retain the tooth in
  alveolus, oppose lateral forces, and protect
  deeper periodontal ligament structures


• 2) Oblique - oppose axially
  directed forces               1                3
                                2

• 3) Transseptal - prevent
  teeth from losing contact
Periodontal Ligament Design
       and Function

• 4) Horizontal - oppose lateral forces

• 5) Interradicular - prevent tooth tipping and
  extrusion

• 6) Apical - prevent tooth
                                                  4
• tipping and extrusion,                          5
• protect vessel and nerve                        6
• supply to the tooth
  Shape of Proximal
     Contact Areas
Maxillary Premolar Teeth
     Mesial View First Premolar




     Distal View First Premolar
          Tooth Angulation
           First Premolar
                   • Maxillary

•
            9o                   5o
•   Mesiodistal                       Faciolingual

•
            6o                   9o
                  • Mandibular
      Tooth Angulation                 Central
               Incisor
                        • Maxillary

•
                  2o                  28o
•   Mesiodistal                        Faciolingual

•
                  2o                  22o
                       • Mandibular
     Tooth Angulation                   Lateral
              Incisor
                        • Maxillary

•
                  7o                  26o
•   Mesiodistal                        Faciolingual

•
                  0o                  23o
                       • Mandibular
     Tooth Angulation                    Canine
                         • Maxillary

•
                  17o                  16o
•   Mesiodistal                         Faciolingual

•
                  6o                   12o
                        • Mandibular

								
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