Orientation Jaw Relation
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com

www.indi...
Topics of Discussion
Introduction
Definitions
Review of literature
Classification
Parts of facebow
Discussion
Conclusion
B...
Introduction

The maxillary arch has a definite 3dimensional relationship to all condylar
motions of the mandible.

www.in...
Jaw relations can be classified as
1.Orientation jaw relation
2. Vertical jaw relation
3. Horizontal jaw relation

www.ind...
Orientation jaw relation
Orientation jaw relations establishes the
references in the cranium.
The mandible rotates in the ...
Facebow
transfer is the
first step in
recording the
relationship
of the
maxillary arch
to the
condylar
paths on the
articu...
Maxillomandibular relationship: any
spatial relationship of the maxillae to the
mandible; any one of the infinite
relation...


Transverse horizontal axis: an
imaginary line around which the mandible
may rotate within the sagittal plane [Gpt-99].
...
Retruded contact position: that guided
occlusal relationship occurring at the most
retruded position of the condyles in th...
Face-bow: a caliper-like instrument used
to record the spatial relationship of the
maxillary arch to some anatomic referen...
Review of literature
In 1860 according to Bonwill, the distance
from the centre of each condyle to the
median incisal poin...
In 1866 Balkwill designed an apparatus
called “bite- frame”.
In 1880 Hayes used tong like device which
he called it “artic...
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
face bow primarily to
record ...
SNOW introduced face
bow in 1899 and
majority of the face bow
used today are
modifications of Snow's
face bow.

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CLASSIFICATION OF FACE BOW
Arbitrary
Fascia Type
Earpiece Type
Twirl bow
Spring bow
Slidematic

Kinematic

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ARBITRARY FACEBOW

a device used to
arbitrarily relate the
maxillary cast to the
condylar elements of
an articulator. The
...
TYPES OF ARBITRARY FACEBOWS

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Fascia Type

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Earpiece Type

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Spring bow

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Slidematic
EAR PLUGS

ANTERIOR
REFERENCE
POINTER

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KINEMATIC FACE BOW
a face-bow with
adjustable caliper
ends used to locate
the transverse
horizontal axis of the
mandible [...
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 pointer with
clamp
(optiona...
Spring bow

www.indiandentalacademy.com
U shaped frame

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www.indiandentalacademy.com
Bite fork

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Bite fork assembly

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Transfer jig assembly

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INDICATIONS OF FACEBOW


Balanced occlusion is desired.



Cusp form teeth are used.



Interocclusal check records are...
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
are done
Articulators that do...
ADVANTAGES OF FACEBOW
Reduce errors in occlusion.
More accurate programming of articulator.
Supports the cast while mounti...
SOME COMMONLY USED ANTERIOR
REFERENCE POINT
Orbitale
Orbital minus 7mm
Nasion minus 23mm
Ala of the nose
43 mm superior fr...
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 plane.
Camper’s plane.
Axis...
Pre-requisites for facebow transfer


Check for




Lip support
Plane of occlusion
Reference lines




Midline
High...
Techniques to record face bow




A separate transfer record base is
recommended for transferring maxillary cast
to arti...
PROCEDURE FOR FACE BOW TRANSFER USING
ARBITRARY FACEBOW

Posterior reference
point is measured
and marked.
Condylar rod or...
The Bite fork is
attached
to
the
maxillary
occlusal
Rim.
Occlusal rim are
inserted into patient
mouth.
The midline of bite...
PROCEDURE FOR FACEBOW TRANSFER USING
KINEMATIC FACEBOW

Facebow
is
attached to the
lower
jaw
by
means of clutch.
Graph
of
...
Patient is asked to
open and close the
mandible at centric.
Initial movement of
the stylus may be arc
shaped.
The
stylus
i...
ERRORS IN RECORDING HINGE
AXIS
Movement of the skin over the condyle
during registration.
Tipping of Base will invalidate ...
The bite fork shaft
should be at the
left of patient’s
midline

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Bite fork assembly

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

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
earpiece gently
into each ...


Have the patient
adjust the facebow
into a comfortable
position.

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

The infra orbital
notch is located
and marked.

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

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.

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

The thumbscrews
are tightened in
order: 1, 2, 3. from
left to right.

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



Rotate the orbital
pointer away from
the eye.
Have the patient
remove the
earpieces from the
auditory meati

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Preparing the articulator for Mounting

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

Horizontal condylar
inclination

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

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
mounting guide
and secure it ...




Carefully seat the
maxillary cast on
the bite fork.
Mounting of the
maxillary cast is
done.

www.indiandentalacademy...
CONCLUSION




Though blind orientation of maxillary cast
may result in an error so slight that a
facebow appears unnece...
BIBLIOGRAPHY








Prosthodontic treatment for edentulous
patient-(8th, 11th, 12th,)
Boucher
Syllabus of Complete De...





The Glossary of Prosthodontic Terms
JPD-1953,VOL.3
JPD-1979,VOL.41,NO.5
JPD-2000,VOL.9,NO.3

www.indiandentalacad...
Thank you
For more details please visit
www.indiandentalacademy.com

www.indiandentalacademy.com
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Orientation jaw relation /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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Orientation jaw relation /certified fixed orthodontic courses by Indian dental academy

  1. 1. Orientation Jaw Relation INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. Topics of Discussion Introduction Definitions Review of literature Classification Parts of facebow Discussion Conclusion Bibliography www.indiandentalacademy.com
  3. 3. Introduction The maxillary arch has a definite 3dimensional relationship to all condylar motions of the mandible. www.indiandentalacademy.com
  4. 4. Jaw relations can be classified as 1.Orientation jaw relation 2. Vertical jaw relation 3. Horizontal jaw relation www.indiandentalacademy.com
  5. 5. 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 www.indiandentalacademy.com
  6. 6. Facebow transfer is the first step in recording the relationship of the maxillary arch to the condylar paths on the articulator. www.indiandentalacademy.com
  7. 7. 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]. www.indiandentalacademy.com
  8. 8.  Transverse horizontal axis: an imaginary line around which the mandible may rotate within the sagittal plane [Gpt-99]. www.indiandentalacademy.com
  9. 9. 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]. www.indiandentalacademy.com
  10. 10. 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]. www.indiandentalacademy.com
  11. 11. 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. www.indiandentalacademy.com
  12. 12. 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”. www.indiandentalacademy.com
  13. 13. Walker invented FACIAL CLINOMETER to determine mandibular movements in 1896. www.indiandentalacademy.com
  14. 14. 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. www.indiandentalacademy.com
  15. 15. SNOW introduced face bow in 1899 and majority of the face bow used today are modifications of Snow's face bow. www.indiandentalacademy.com
  16. 16. CLASSIFICATION OF FACE BOW Arbitrary Fascia Type Earpiece Type Twirl bow Spring bow Slidematic Kinematic www.indiandentalacademy.com
  17. 17. 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]. www.indiandentalacademy.com
  18. 18. TYPES OF ARBITRARY FACEBOWS www.indiandentalacademy.com
  19. 19. Fascia Type www.indiandentalacademy.com
  20. 20. Earpiece Type www.indiandentalacademy.com
  21. 21. Spring bow www.indiandentalacademy.com
  22. 22. Slidematic EAR PLUGS ANTERIOR REFERENCE POINTER www.indiandentalacademy.com
  23. 23. KINEMATIC FACE BOW a face-bow with adjustable caliper ends used to locate the transverse horizontal axis of the mandible [Gpt-99]. www.indiandentalacademy.com
  24. 24. Arbitrary vs. Kinematic Land marks Chair side time Facebow fork attachment Method Use www.indiandentalacademy.com
  25. 25. 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. www.indiandentalacademy.com
  26. 26. Spring bow www.indiandentalacademy.com
  27. 27. U shaped frame www.indiandentalacademy.com
  28. 28. www.indiandentalacademy.com
  29. 29. Bite fork www.indiandentalacademy.com
  30. 30. Bite fork assembly www.indiandentalacademy.com
  31. 31. Transfer jig assembly www.indiandentalacademy.com
  32. 32. INDICATIONS OF FACEBOW  Balanced occlusion is desired.  Cusp form teeth are used.  Interocclusal check records are used.  Full mouth rehabilitation  Diagnosis & treatment planning. www.indiandentalacademy.com
  33. 33. Complete maxillary denture opposes a natural dentition Remounting of dentures www.indiandentalacademy.com
  34. 34. Is facebow transfer essential in all cd cases? www.indiandentalacademy.com
  35. 35. 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 www.indiandentalacademy.com
  36. 36. 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 www.indiandentalacademy.com
  37. 37. 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). www.indiandentalacademy.com
  38. 38. SOME COMMONLY USED POSTERIOR REFERENCE POINT  Bregstrom point  Beyron point www.indiandentalacademy.com
  39. 39. COMMONLY USED PLANES OF ORIENTATION DURING FACEBOW TRANSFERS Axis – orbitale plane. Frankfort plane. Camper’s plane. Axis – Nasion plane. www.indiandentalacademy.com
  40. 40. Pre-requisites for facebow transfer  Check for    Lip support Plane of occlusion Reference lines    Midline High lip line Canine line www.indiandentalacademy.com
  41. 41. 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 www.indiandentalacademy.com
  42. 42. 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. www.indiandentalacademy.com
  43. 43. 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. www.indiandentalacademy.com
  44. 44. 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. www.indiandentalacademy.com
  45. 45. 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. www.indiandentalacademy.com
  46. 46. 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. www.indiandentalacademy.com
  47. 47. The bite fork shaft should be at the left of patient’s midline www.indiandentalacademy.com
  48. 48. Bite fork assembly www.indiandentalacademy.com
  49. 49.  The bite fork clamp is slid onto the shaft www.indiandentalacademy.com
  50. 50.  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. www.indiandentalacademy.com
  51. 51.  Have the patient adjust the facebow into a comfortable position. www.indiandentalacademy.com
  52. 52.  The infra orbital notch is located and marked. www.indiandentalacademy.com
  53. 53.  The pointer is rotated toward the reference mark www.indiandentalacademy.com
  54. 54.  The bow is secured with one hand while the thumbscrews on the assembly with the other hand. www.indiandentalacademy.com
  55. 55.  The thumbscrews are tightened in order: 1, 2, 3. from left to right. www.indiandentalacademy.com
  56. 56.   Rotate the orbital pointer away from the eye. Have the patient remove the earpieces from the auditory meati www.indiandentalacademy.com
  57. 57. Preparing the articulator for Mounting www.indiandentalacademy.com
  58. 58.  Horizontal condylar inclination www.indiandentalacademy.com
  59. 59.  Lateral condylar inclination www.indiandentalacademy.com
  60. 60.  Centric locks www.indiandentalacademy.com
  61. 61.  Attach the mounting guide / platform to the lower member of the articulator www.indiandentalacademy.com
  62. 62.  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 www.indiandentalacademy.com
  63. 63.   Carefully seat the maxillary cast on the bite fork. Mounting of the maxillary cast is done. www.indiandentalacademy.com
  64. 64. 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. www.indiandentalacademy.com
  65. 65. BIBLIOGRAPHY     Prosthodontic treatment for edentulous patient-(8th, 11th, 12th,) Boucher Syllabus of Complete DentureHartwell Essentials of complete dentureWinkler Complete Denture Prosthodontics John J Sharry www.indiandentalacademy.com
  66. 66.     The Glossary of Prosthodontic Terms JPD-1953,VOL.3 JPD-1979,VOL.41,NO.5 JPD-2000,VOL.9,NO.3 www.indiandentalacademy.com
  67. 67. Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com

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