Mandibular movement
Dr Mohamed Elkhodary Saad         Eldeen    Asso. Prof. of prosthodontic      www.elkhodary.net   mohamed.elkhodary@hotmai...
Mandibular Movements• Factors regulate mandibular movement• Anatomic Considerations• Tempromandibular joint• Muscles• Liga...
Factors regulate mandibular            movement1.Intiating position or centric relation •2.Influence of opposing tooth con...
TMJ: is a bilateral joints permits the mandible to move as a unit with two     functional patterns:• Hinge (inferior porti...
Articular Disk (Meniscus)• Biconcave oval structure  interposed between the  condyle and the temporal bone
Ligaments :1-collateral(discal)2-capsular3-tempromandibular4-sphenomandibular5-stylomandibular
Muscles of mastication:1- masseter: superficial & deep2- temporalis3- medial pterygoid4- lateral pterygoid: superior & inf...
Temporalis
Pterygoids
Digastric – assists opening of mouth
TMJ Capsule
TMJ Capsule
Posterior band of articular disc                          Anterior band of articular disc          Mandibular condyle (hea...
Mandibular condyle (head)  Articular disc
MRI and autopsysections: upper rowoblique sagittalMRI, asymptomaticvolunteer: leftlateral, middlemedial, rightopened mouth
Partial anterior disc displacement at baselinelateral sections   central sections   open-mouth
Complete anterior disc displacement  medial section     Autopsy          Open-mouth                                      MRI
Lateral disc displacement and normal bone
Medial disc displacement      coronal MRI          Oblique coronal MRI
The sagittal, frontal, andhorizontal planes of reference
TMJ Motions
TMJ Motions
A. Transverse axis. B. Sagittal      axis C. Vertical axis
The relation of the head of the     condyle to the fossa
Opening
Opening
Opening
Opening
Posselt’s Figure
Posselt’s Investigations
Posselt’s Investigations
Significance of studying        mandibular movements:• Designing, selection, and adjustment of  articulator.• Developing t...
Practical application of Mandibular            Movements•   Change vertical dimension on articulator.•   Christenson pheno...
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Mandibular Movement
Upcoming SlideShare
Loading in …5
×

Mandibular Movement

26,428 views

Published on

dentistry,mandibular movement By: Dr Mohamed Elkhodary Saad Eldeen Asso. Prof. of prosthodontic www.elkhodary.net Factors regulate mandibular movement Anatomic Considerations Tempromandibular joint Muscles Ligaments Basic Mandibular Movements Opening and closing Protrusive (forward) Retrusive (backward) Lateral Practical Significance of Studying Mandibular Movements Practical application of Mandibular Movements

Published in: Health & Medicine, Spiritual
  • Be the first to comment

Mandibular Movement

  1. 1. Mandibular movement
  2. 2. Dr Mohamed Elkhodary Saad Eldeen Asso. Prof. of prosthodontic www.elkhodary.net mohamed.elkhodary@hotmail.com
  3. 3. Mandibular Movements• Factors regulate mandibular movement• Anatomic Considerations• Tempromandibular joint• Muscles• Ligaments• Basic Mandibular Movements• Opening and closing• Protrusive (forward)• Retrusive (backward)• Lateral• Practical Significance of Studying Mandibular Movements• Practical application of Mandibular Movements
  4. 4. Factors regulate mandibular movement1.Intiating position or centric relation •2.Influence of opposing tooth contact •3.Axis of mandibular rotation •4.Muscles. •5.Neuromuscular regulate mandibular •movement.6.Anatomy and physiology of TMJ. •
  5. 5. TMJ: is a bilateral joints permits the mandible to move as a unit with two functional patterns:• Hinge (inferior portion)• Translation (superior portion) (ginglymoarthroidal joint) (compound joint) it has four anatomical parts:1- condyle2- articular fossa3- articular disc4- articular capsule
  6. 6. Articular Disk (Meniscus)• Biconcave oval structure interposed between the condyle and the temporal bone
  7. 7. Ligaments :1-collateral(discal)2-capsular3-tempromandibular4-sphenomandibular5-stylomandibular
  8. 8. Muscles of mastication:1- masseter: superficial & deep2- temporalis3- medial pterygoid4- lateral pterygoid: superior & inferior - Digastric muscles is not a muscle of mastication but it play an important role in mandibular function.
  9. 9. Temporalis
  10. 10. Pterygoids
  11. 11. Digastric – assists opening of mouth
  12. 12. TMJ Capsule
  13. 13. TMJ Capsule
  14. 14. Posterior band of articular disc Anterior band of articular disc Mandibular condyle (head) Lateral pterygoid muscle rapheLower head of lateral pterygoid muscle Posterior disc attachment
  15. 15. Mandibular condyle (head) Articular disc
  16. 16. MRI and autopsysections: upper rowoblique sagittalMRI, asymptomaticvolunteer: leftlateral, middlemedial, rightopened mouth
  17. 17. Partial anterior disc displacement at baselinelateral sections central sections open-mouth
  18. 18. Complete anterior disc displacement medial section Autopsy Open-mouth MRI
  19. 19. Lateral disc displacement and normal bone
  20. 20. Medial disc displacement coronal MRI Oblique coronal MRI
  21. 21. The sagittal, frontal, andhorizontal planes of reference
  22. 22. TMJ Motions
  23. 23. TMJ Motions
  24. 24. A. Transverse axis. B. Sagittal axis C. Vertical axis
  25. 25. The relation of the head of the condyle to the fossa
  26. 26. Opening
  27. 27. Opening
  28. 28. Opening
  29. 29. Opening
  30. 30. Posselt’s Figure
  31. 31. Posselt’s Investigations
  32. 32. Posselt’s Investigations
  33. 33. Significance of studying mandibular movements:• Designing, selection, and adjustment of articulator.• Developing tooth form for dental restorations.• Understanding the basic principles of occlusion.• Diagnosis and treatment of TMJ disturbances.• Preserving periodontal health.• Arrangement of artificial teeth.
  34. 34. Practical application of Mandibular Movements• Change vertical dimension on articulator.• Christenson phenomena• Condylar path & incisal path.• Condylar guidance & incisal guidance• Gothic arch.

×