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Orientation Jaw Relation
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.india...
www.indiandentalacademy.com
Topics of Discussion
Introduction
Definitions
Review of literature
Classification
Parts of fac...
www.indiandentalacademy.com
Introduction
The maxillary arch has a definite 3-
dimensional relationship to all condylar
mot...
www.indiandentalacademy.com
Jaw relations can be classified as
1.Orientation jaw relation
2. Vertical jaw relation
3. Hori...
www.indiandentalacademy.com
Orientation jaw relation
Orientation jaw relations establishes the
references in the cranium.
...
www.indiandentalacademy.com
Facebow
transfer is the
first step in
recording the
relationship
of the
maxillary arch
to the
...
www.indiandentalacademy.com
Maxillomandibular relationship: any
spatial relationship of the maxillae to the
mandible; any ...
www.indiandentalacademy.com
 Transverse horizontal axis: an
imaginary line around which the mandible
may rotate within th...
www.indiandentalacademy.com
Retruded contact position: that guided
occlusal relationship occurring at the most
retruded po...
www.indiandentalacademy.com
Face-bow: a caliper-like instrument used
to record the spatial relationship of the
maxillary a...
www.indiandentalacademy.com
Review of literature
In 1860 according to Bonwill, the distance
from the centre of each condyl...
www.indiandentalacademy.com
In 1866 Balkwill designed an apparatus
called “bite- frame”.
In 1880 Hayes used tong like devi...
www.indiandentalacademy.com
Walker invented
FACIAL CLINOMETER
to determine
mandibular movements
in 1896.
www.indiandentalacademy.com
A little later, at about
the turn of century
ALFERED GYSI
developed an
instrument similar to
f...
www.indiandentalacademy.com
SNOW introduced face
bow in 1899 and
majority of the face bow
used today are
modifications of ...
www.indiandentalacademy.com
CLASSIFICATION OF FACE BOW
Arbitrary
Fascia Type
Earpiece Type
Twirl bow
Spring bow
Slidematic...
www.indiandentalacademy.com
ARBITRARY FACEBOW
a device used to
arbitrarily relate the
maxillary cast to the
condylar eleme...
www.indiandentalacademy.com
TYPES OF ARBITRARY FACEBOWS
www.indiandentalacademy.com
Fascia Type
www.indiandentalacademy.com
Earpiece Type
www.indiandentalacademy.com
Spring bow
www.indiandentalacademy.com
EAR PLUGS
ANTERIOR
REFERENCE
POINTER
Slidematic
www.indiandentalacademy.com
KINEMATIC FACE BOW
a face-bow with
adjustable caliper
ends used to locate
the transverse
horiz...
www.indiandentalacademy.com
Arbitrary vs. Kinematic
Land marks
Chair side time
Facebow fork attachment
Method
Use
www.indiandentalacademy.com
BASIC PARTS OF A FACEBOW
U shaped frame work.
Condylar rods.
Bite fork.
Locking device
Orbital...
www.indiandentalacademy.com
Spring bow
www.indiandentalacademy.com
U shaped frame
www.indiandentalacademy.com
www.indiandentalacademy.com
Bite fork
www.indiandentalacademy.com
Bite fork assembly
www.indiandentalacademy.com
Transfer jig assembly
www.indiandentalacademy.com
INDICATIONS OF FACEBOW
 Balanced occlusion is desired.
 Cusp form teeth are used.
 Interocc...
www.indiandentalacademy.com
Complete maxillary denture opposes a
natural dentition
Remounting of dentures
www.indiandentalacademy.com
Is facebow transfer essential in all
cd cases?
www.indiandentalacademy.com
It is not required when
Monoplane teeth are used
No alterations to occlusal surface of teeth
a...
www.indiandentalacademy.com
ADVANTAGES OF FACEBOW
Reduce errors in occlusion.
More accurate programming of articulator.
Su...
www.indiandentalacademy.com
SOME COMMONLY USED ANTERIOR
REFERENCE POINT
Orbitale
Orbital minus 7mm
Nasion minus 23mm
Ala o...
www.indiandentalacademy.com
SOME COMMONLY USED POSTERIOR
REFERENCE POINT
 Bregstrom point
 Beyron point
www.indiandentalacademy.com
COMMONLY USED PLANES OF
ORIENTATION DURING FACEBOW
TRANSFERS
Axis – orbitale
plane.
Frankfort ...
www.indiandentalacademy.com
Pre-requisites for facebow transfer
 Check for
 Lip support
 Plane of occlusion
 Reference...
www.indiandentalacademy.com
Techniques to record face bow
 A separate transfer record base is
recommended for transferrin...
www.indiandentalacademy.com
PROCEDURE FOR FACE BOW TRANSFER USING
ARBITRARY FACEBOW
Posterior reference
point is measured
...
www.indiandentalacademy.com
The Bite fork is
attached to the
maxillary occlusal
Rim.
Occlusal rim are
inserted into patien...
www.indiandentalacademy.com
PROCEDURE FOR FACEBOW TRANSFER USING
KINEMATIC FACEBOW
Facebow is
attached to the
lower jaw by...
www.indiandentalacademy.com
Patient is asked to
open and close the
mandible at centric.
Initial movement of
the stylus may...
www.indiandentalacademy.com
ERRORS IN RECORDING HINGE
AXIS
Movement of the skin over the condyle
during registration.
Tipp...
www.indiandentalacademy.com
The bite fork shaft
should be at the
left of patient’s
midline
www.indiandentalacademy.com
Bite fork assembly
www.indiandentalacademy.com
 The bite fork clamp
is slid onto the
shaft
www.indiandentalacademy.com
 Open the bow by
pulling outward on
the arms and then
swing it down into
position, placing an...
www.indiandentalacademy.com
 Have the patient
adjust the facebow
into a comfortable
position.
www.indiandentalacademy.com
 The infra orbital
notch is located
and marked.
www.indiandentalacademy.com
 The pointer is
rotated toward the
reference mark
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 The bow is
secured with one
hand while the
thumbscrews on
the assembly with
the other hand.
www.indiandentalacademy.com
 The thumbscrews
are tightened in
order: 1, 2, 3. from
left to right.
www.indiandentalacademy.com
 Rotate the orbital
pointer away from
the eye.
 Have the patient
remove the
earpieces from t...
www.indiandentalacademy.com
Preparing the articulator for Mounting
www.indiandentalacademy.com
 Horizontal condylar
inclination
www.indiandentalacademy.com
 Lateral condylar
inclination
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 Centric locks
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 Attach the
mounting guide /
platform to the
lower member of
the articulator
www.indiandentalacademy.com
 Place the vertical
transfer rod of
the facebow
assembly into
the hole at the
front of the
mo...
www.indiandentalacademy.com
 Carefully seat the
maxillary cast on
the bite fork.
 Mounting of the
maxillary cast is
done.
www.indiandentalacademy.com
CONCLUSION
 Though blind orientation of maxillary cast
may result in an error so slight that ...
www.indiandentalacademy.com
BIBLIOGRAPHY
 Prosthodontic treatment for edentulousProsthodontic treatment for edentulous
pa...
www.indiandentalacademy.com
 The Glossary of Prosthodontic Terms
 JPD-1953,VOL.3
 JPD-1979,VOL.41,NO.5
 JPD-2000,VOL.9...
Thank you
For more details please visit
www.indiandentalacademy.com
www.indiandentalacademy.com
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Orientation jaw relation/ dentistry jobs

  1. 1. www.indiandentalacademy.com Orientation Jaw Relation INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com
  2. 2. www.indiandentalacademy.com Topics of Discussion Introduction Definitions Review of literature Classification Parts of facebow Discussion Conclusion Bibliography
  3. 3. www.indiandentalacademy.com Introduction The maxillary arch has a definite 3- dimensional relationship to all condylar motions of the mandible.
  4. 4. www.indiandentalacademy.com Jaw relations can be classified as 1.Orientation jaw relation 2. Vertical jaw relation 3. Horizontal jaw relation
  5. 5. www.indiandentalacademy.com Orientation jaw relation Orientation jaw relations establishes the references in the cranium. The mandible rotates in the sagittal plane around an imaginary transverse axis passing through or near the condyles. This axis can be located by means of an instrument called FACEBOW
  6. 6. www.indiandentalacademy.com Facebow transfer is the first step in recording the relationship of the maxillary arch to the condylar paths on the articulator.
  7. 7. www.indiandentalacademy.com Maxillomandibular relationship: any spatial relationship of the maxillae to the mandible; any one of the infinite relationships of the mandible to the maxillae [Gpt-99].
  8. 8. www.indiandentalacademy.com  Transverse horizontal axis: an imaginary line around which the mandible may rotate within the sagittal plane [Gpt-99].
  9. 9. www.indiandentalacademy.com Retruded contact position: that guided occlusal relationship occurring at the most retruded position of the condyles in the joint cavities. A position that may be more retruded than the centric relation position [Gpt-99].
  10. 10. www.indiandentalacademy.com Face-bow: a caliper-like instrument used to record the spatial relationship of the maxillary arch to some anatomic reference point or points and then transfer this relationship to an articulator; it orients the dental cast in the same relationship to the opening axis of the articulator. Customarily, the anatomic references are the mandibular condyles transverse horizontal axis and one other selected anterior point; called also hingebow [Gpt-99].
  11. 11. www.indiandentalacademy.com Review of literature In 1860 according to Bonwill, the distance from the centre of each condyle to the median incisal point of the lower teeth is 10 cm. He used this standard for mounting his casts in the articulator.
  12. 12. www.indiandentalacademy.com In 1866 Balkwill designed an apparatus called “bite- frame”. In 1880 Hayes used tong like device which he called it “articulating caliper”. In 1894 George k Bagby devised an apparatus called “bagby jaw gage”.
  13. 13. www.indiandentalacademy.com Walker invented FACIAL CLINOMETER to determine mandibular movements in 1896.
  14. 14. www.indiandentalacademy.com A little later, at about the turn of century ALFERED GYSI developed an instrument similar to face bow primarily to record the path of the condyle.
  15. 15. www.indiandentalacademy.com SNOW introduced face bow in 1899 and majority of the face bow used today are modifications of Snow's face bow.
  16. 16. www.indiandentalacademy.com CLASSIFICATION OF FACE BOW Arbitrary Fascia Type Earpiece Type Twirl bow Spring bow Slidematic Kinematic
  17. 17. www.indiandentalacademy.com ARBITRARY FACEBOW a device used to arbitrarily relate the maxillary cast to the condylar elements of an articulator. The position of the transverse horizontal axis is estimated on the face before using this device [Gpt-99].
  18. 18. www.indiandentalacademy.com TYPES OF ARBITRARY FACEBOWS
  19. 19. www.indiandentalacademy.com Fascia Type
  20. 20. www.indiandentalacademy.com Earpiece Type
  21. 21. www.indiandentalacademy.com Spring bow
  22. 22. www.indiandentalacademy.com EAR PLUGS ANTERIOR REFERENCE POINTER Slidematic
  23. 23. www.indiandentalacademy.com KINEMATIC FACE BOW a face-bow with adjustable caliper ends used to locate the transverse horizontal axis of the mandible [Gpt-99].
  24. 24. www.indiandentalacademy.com Arbitrary vs. Kinematic Land marks Chair side time Facebow fork attachment Method Use
  25. 25. www.indiandentalacademy.com BASIC PARTS OF A FACEBOW U shaped frame work. Condylar rods. Bite fork. Locking device Orbital pointer with clamp (optional). Additional features & parts vary according to types & brands.
  26. 26. www.indiandentalacademy.com Spring bow
  27. 27. www.indiandentalacademy.com U shaped frame
  28. 28. www.indiandentalacademy.com
  29. 29. www.indiandentalacademy.com Bite fork
  30. 30. www.indiandentalacademy.com Bite fork assembly
  31. 31. www.indiandentalacademy.com Transfer jig assembly
  32. 32. www.indiandentalacademy.com INDICATIONS OF FACEBOW  Balanced occlusion is desired.  Cusp form teeth are used.  Interocclusal check records are used.  Full mouth rehabilitation  Diagnosis & treatment planning.
  33. 33. www.indiandentalacademy.com Complete maxillary denture opposes a natural dentition Remounting of dentures
  34. 34. www.indiandentalacademy.com Is facebow transfer essential in all cd cases?
  35. 35. www.indiandentalacademy.com It is not required when Monoplane teeth are used No alterations to occlusal surface of teeth are done Articulators that do not accept facebow transfer
  36. 36. www.indiandentalacademy.com ADVANTAGES OF FACEBOW Reduce errors in occlusion. More accurate programming of articulator. Supports the cast while mounting on the articulator. Assist in correctly locating the incisal plane
  37. 37. www.indiandentalacademy.com SOME COMMONLY USED ANTERIOR REFERENCE POINT Orbitale Orbital minus 7mm Nasion minus 23mm Ala of the nose 43 mm superior from lower border of upper lip (Denar reference plane locator).
  38. 38. www.indiandentalacademy.com SOME COMMONLY USED POSTERIOR REFERENCE POINT  Bregstrom point  Beyron point
  39. 39. www.indiandentalacademy.com COMMONLY USED PLANES OF ORIENTATION DURING FACEBOW TRANSFERS Axis – orbitale plane. Frankfort plane. Camper’s plane. Axis – Nasion plane.
  40. 40. www.indiandentalacademy.com Pre-requisites for facebow transfer  Check for  Lip support  Plane of occlusion  Reference lines  Midline  High lip line  Canine line
  41. 41. www.indiandentalacademy.com Techniques to record face bow  A separate transfer record base is recommended for transferring maxillary cast to articulator  If same record base is used for centric record  transfer record can be made prior to centric record  transfer record can be made after centric record
  42. 42. www.indiandentalacademy.com PROCEDURE FOR FACE BOW TRANSFER USING ARBITRARY FACEBOW Posterior reference point is measured and marked. Condylar rod or earpiece is positioned on posterior reference point The locking nuts are then secured.
  43. 43. www.indiandentalacademy.com The Bite fork is attached to the maxillary occlusal Rim. Occlusal rim are inserted into patient mouth. The midline of bite fork should coincide with the midline of the maxillary occlusal rim.
  44. 44. www.indiandentalacademy.com PROCEDURE FOR FACEBOW TRANSFER USING KINEMATIC FACEBOW Facebow is attached to the lower jaw by means of clutch. Graph of Grid paper is placed near temperomandibula r joint region detects the stylus movement.
  45. 45. www.indiandentalacademy.com Patient is asked to open and close the mandible at centric. Initial movement of the stylus may be arc shaped. The stylus is adjusted until the tip rotates instead of arcing. This point identified as the hinge axis is tattooed on the skin.
  46. 46. www.indiandentalacademy.com ERRORS IN RECORDING HINGE AXIS Movement of the skin over the condyle during registration. Tipping of Base will invalidate the eventual recording. The angle of opening movement is small about 10-12 degrees and thus the arc of movement of the stylus is small.
  47. 47. www.indiandentalacademy.com The bite fork shaft should be at the left of patient’s midline
  48. 48. www.indiandentalacademy.com Bite fork assembly
  49. 49. www.indiandentalacademy.com  The bite fork clamp is slid onto the shaft
  50. 50. www.indiandentalacademy.com  Open the bow by pulling outward on the arms and then swing it down into position, placing an earpiece gently into each external auditory meatus.
  51. 51. www.indiandentalacademy.com  Have the patient adjust the facebow into a comfortable position.
  52. 52. www.indiandentalacademy.com  The infra orbital notch is located and marked.
  53. 53. www.indiandentalacademy.com  The pointer is rotated toward the reference mark
  54. 54. www.indiandentalacademy.com  The bow is secured with one hand while the thumbscrews on the assembly with the other hand.
  55. 55. www.indiandentalacademy.com  The thumbscrews are tightened in order: 1, 2, 3. from left to right.
  56. 56. www.indiandentalacademy.com  Rotate the orbital pointer away from the eye.  Have the patient remove the earpieces from the auditory meati
  57. 57. www.indiandentalacademy.com Preparing the articulator for Mounting
  58. 58. www.indiandentalacademy.com  Horizontal condylar inclination
  59. 59. www.indiandentalacademy.com  Lateral condylar inclination
  60. 60. www.indiandentalacademy.com  Centric locks
  61. 61. www.indiandentalacademy.com  Attach the mounting guide / platform to the lower member of the articulator
  62. 62. www.indiandentalacademy.com  Place the vertical transfer rod of the facebow assembly into the hole at the front of the mounting guide and secure it by a screw
  63. 63. www.indiandentalacademy.com  Carefully seat the maxillary cast on the bite fork.  Mounting of the maxillary cast is done.
  64. 64. www.indiandentalacademy.com CONCLUSION  Though blind orientation of maxillary cast may result in an error so slight that a facebow appears unnecessary, however since the procedure is not complicated, not time consuming, the chances of incorporating an error should not be taken.  Any error that can be eliminated in denture construction will make physiologic acceptance of denture easier.
  65. 65. www.indiandentalacademy.com BIBLIOGRAPHY  Prosthodontic treatment for edentulousProsthodontic treatment for edentulous patient-(8patient-(8th,th, 1111thth , 12, 12thth ,),) BoucherBoucher  Syllabus of Complete Denture-Syllabus of Complete Denture- HartwellHartwell  Essentials of complete denture-Essentials of complete denture- WinklerWinkler  Complete Denture Prosthodontics John J SharryJohn J Sharry
  66. 66. www.indiandentalacademy.com  The Glossary of Prosthodontic Terms  JPD-1953,VOL.3  JPD-1979,VOL.41,NO.5  JPD-2000,VOL.9,NO.3
  67. 67. Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com

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