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Determinants of
occlusal
morphology
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.co...
• Posterior controlling factors.
(condylar guidance)
• Anterior controlling factors.
(anterior guidance)
www.indiandentala...
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
Effect of plane of occlusion on
cusp height
www.indiandentalacademy.com
Effect of curve of spee on
cusp height
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
HORIZONTAL DETERMINANTS OF
OCCLUSAL MORPHOLOGY
DIRECTION OF GROOVES AND RIDGES
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
Gnathological Objectives
• To obtain a stable centric relation of the
mandible and have the teeth intercusp
maximally at t...
• To have a harmonious glide path of
anterior teeth working against each other
to separate or disclude the posterior teeth...
• The glide path provided by the anterior
teeth must be in harmony with the way in
which the mandible moves through
border...
• The cuspids should be the main gliding
inclines on lateral excursion and the six
maxillary anterior teeth should articul...
Ideal tooth positioning
 Lower incisors at the cephalometric goal-
+1 to A-Po
 Tips of the upper incisors 2-2.5mm below
...
• Approx. a 2.5mm overjet-overbite
relationship to the lower incisor(the lower
incisor has .0005” clearance with the
lingu...
• The curve of Wilson that would allow
seating of centric cusps but clearance
upon excursions
• As much divergence as poss...
• Lower incisors aligned contact point-to-
contact point with the roots in the same
plane , when observed from the occlusa...
• The lower bicuspids should be up righted
1 deg from their normal mesial
inclination and should have a slight distal
rota...
• The lower buccal segment should have
progressive torque close to Andrew’s
measurements for establishing the curve
of wil...
• The upper bicuspids should be uprighted
to 0 deg from their normal 2 deg mesial
inclination with no rotation.
• The uppe...
• The upper lateral and central incisors
should be almost equal in incisal edge
length ,with no more than 0.5mm height
dif...
• The arch form should be a modified
catenary curve consisting of five separate
radii- one for front of the arch form, one...
• The widest point of the lower arch would
be at the mesiobuccal cusp of the mand.
First molars and at the first bicuspids...
Thank you
For more details please visit
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
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Determinents of occlusion morphology /certified fixed orthodontic courses by Indian dental academy

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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.


Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078

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Determinents of occlusion morphology /certified fixed orthodontic courses by Indian dental academy

  1. 1. Determinants of occlusal morphology INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. • Posterior controlling factors. (condylar guidance) • Anterior controlling factors. (anterior guidance) www.indiandentalacademy.com
  3. 3. www.indiandentalacademy.com
  4. 4. www.indiandentalacademy.com
  5. 5. www.indiandentalacademy.com
  6. 6. www.indiandentalacademy.com
  7. 7. www.indiandentalacademy.com
  8. 8. www.indiandentalacademy.com
  9. 9. Effect of plane of occlusion on cusp height www.indiandentalacademy.com
  10. 10. Effect of curve of spee on cusp height www.indiandentalacademy.com
  11. 11. www.indiandentalacademy.com
  12. 12. www.indiandentalacademy.com
  13. 13. www.indiandentalacademy.com
  14. 14. www.indiandentalacademy.com
  15. 15. HORIZONTAL DETERMINANTS OF OCCLUSAL MORPHOLOGY DIRECTION OF GROOVES AND RIDGES www.indiandentalacademy.com
  16. 16. www.indiandentalacademy.com
  17. 17. www.indiandentalacademy.com
  18. 18. www.indiandentalacademy.com
  19. 19. www.indiandentalacademy.com
  20. 20. www.indiandentalacademy.com
  21. 21. www.indiandentalacademy.com
  22. 22. Gnathological Objectives • To obtain a stable centric relation of the mandible and have the teeth intercusp maximally at this mandibular position • All centric stops should hit equally and simultaneously and the stress of closure should be directed, as nearly as possible, down the long axis of the posterior teeth. www.indiandentalacademy.com
  23. 23. • To have a harmonious glide path of anterior teeth working against each other to separate or disclude the posterior teeth immediately, but gently , as soon as the mandible moves out of centric closure. www.indiandentalacademy.com
  24. 24. • The glide path provided by the anterior teeth must be in harmony with the way in which the mandible moves through border excursions. If there is immediate shift of the mandible, there must be a concavity in the lingual surfaces of the maxillary anterior teeth to accommodate the side shift movement , or the anterior teeth will be stressed. www.indiandentalacademy.com
  25. 25. • The cuspids should be the main gliding inclines on lateral excursion and the six maxillary anterior teeth should articulate with the six mandibular anterior teeth and the mandibular bicuspids(first bicuspid in non-extraction cases)so that the protrusive load is spread over 14 teeth. www.indiandentalacademy.com
  26. 26. Ideal tooth positioning  Lower incisors at the cephalometric goal- +1 to A-Po  Tips of the upper incisors 2-2.5mm below the lip embrasure of the upper and lower lips , when the lips are closed with no lip strain  No more than 1mm of attached gingiva showing upon full smile www.indiandentalacademy.com
  27. 27. • Approx. a 2.5mm overjet-overbite relationship to the lower incisor(the lower incisor has .0005” clearance with the lingual surface of the upper incisor • A level or nearly level occlusal plane at the end of appliance therapy that would return to a 1-1.5mm curve at its deepest point after appliance removal and setting of the occlusion www.indiandentalacademy.com
  28. 28. • The curve of Wilson that would allow seating of centric cusps but clearance upon excursions • As much divergence as possible of the occlusal plane from the angle of the eminence for excursive clearance. www.indiandentalacademy.com
  29. 29. • Lower incisors aligned contact point-to- contact point with the roots in the same plane , when observed from the occlusal , and a mesioaxial inclination of 2 degrees • Lower cuspid crowns angulated mesially 5 deg with the incisal tip 1mm higher than the incisal edge of the lateral incisors. www.indiandentalacademy.com
  30. 30. • The lower bicuspids should be up righted 1 deg from their normal mesial inclination and should have a slight distal rotation • The lower molars should be up righted 1deg from their normal 2 deg mesial inclination and should have a slight distal rotation. www.indiandentalacademy.com
  31. 31. • The lower buccal segment should have progressive torque close to Andrew’s measurements for establishing the curve of wilson and there should be no rotations or spaces • The upper six year molars should have sufficient distal rotation,mesio axial inclination,and buccal root torque; the same would follow for the upper second molars. www.indiandentalacademy.com
  32. 32. • The upper bicuspids should be uprighted to 0 deg from their normal 2 deg mesial inclination with no rotation. • The upper cuspid must have its contact points adjacent to the contact points of the upper bicuspid and lateral incisor ; it should have 11- 13 deg of mesial crown tip and mesial rotation of 4 deg on an extraction case. www.indiandentalacademy.com
  33. 33. • The upper lateral and central incisors should be almost equal in incisal edge length ,with no more than 0.5mm height differential; they should have 9 deg and 5deg mesioaxial inclination resp. and there should be sufficient torque. • There should be no rotations ( other than those of overcorrection ) or spaces in the upper arch and the buccal segments from the cuspids distally should have 14 deg nonprogressive buccal root torque. www.indiandentalacademy.com
  34. 34. • The arch form should be a modified catenary curve consisting of five separate radii- one for front of the arch form, one for each cuspid bicuspid area, and one each for buccal segment from the first bicuspid distally www.indiandentalacademy.com
  35. 35. • The widest point of the lower arch would be at the mesiobuccal cusp of the mand. First molars and at the first bicuspids • The widest point of the maxillary arch would be at the mesiobuccal cusps of the first molars. www.indiandentalacademy.com
  36. 36. Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com
  37. 37. www.indiandentalacademy.com
  38. 38. www.indiandentalacademy.com
  39. 39. www.indiandentalacademy.com
  40. 40. www.indiandentalacademy.com
  41. 41. www.indiandentalacademy.com
  42. 42. www.indiandentalacademy.com
  43. 43. www.indiandentalacademy.com

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