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Dr. Richard G. Stevenson III
The Facebow Record Dr. Richard G. Stevenson III
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THE FACEBOW RECORD
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Purpose To accurately mount the maxillary cast to articulator
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Fossa Upper Bow Incisal Pin Centric Latch Bitefork Transfer Jig Assembly Mounting Plate (ring) Articulator Index
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Facebow Transfer Establishes the relationship between the maxillary arch and the horizontal plane. Transfers this this relationship to the articulator. Provides for an accurate mounting of the maxillary cast to the articulator.
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Articulator (ar tik ye la ter), n. 3. Dentistry. a mechanical device, representing the jaws, to which casts may be attached: used in the making of dentures. [ ; ARTICULATE + OR2]
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Slidematic Measuring Bow components
Earplug Anterior reference pointer Intercondylar distance scale Finger lockscrew Center lock wheel Sight Reference plane locator and marker
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SLIDEMATIC FACEBOW EAR PLUGS ANTERIOR REFERENCE POINTER
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SIGHT CENTER LOCKWHEEL FINGER LOCKSCEREW
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INTERCONDYLAR DISTANCE SCALE
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ANTERIOR REFERENCE POINTER
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Transfer Jig Assembly components
Bitefork Vertical shaft #1 and # 2 clamps Finger screws Articulator index
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TRANSFER JIG ASSEMBLY BITEFORK VERTICAL SHAFT CLAMP #2 CLAMP #1 FINGER
SCREWS ARTICULATOR INDEX
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Procedure
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Facebow Landmarks External auditory meatus Anterior reference point
Arbitrary hinge axis location Anterior reference point Maxillary arch
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Procedure Mark anterior reference point
43 mm above incisal edge of tooth # 7 or #8
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43 mm
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Procedure Cover bitefork with 2 layers of softened baseplate wax
Use warm water (135 degrees)
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Procedure Insert fork in mouth with the arm to the patient’s right
Align midline with index notch Keep fork horizontal
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Procedure Press wax against maxillary teeth to index
Have patient secure the bitefork by biting on fork supported below by cotton rolls between the mandibular teeth and the fork
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Procedure Attach the vertical shaft to the measuring bow
#2 clamp to patient’s right Tighten finger screw
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Procedure Prepare bow and transfer jig
Loosen screws #1 and #2 on clamps Loosen bow center wheel with thumb Slide bow open
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Procedure Assemble facebow on patient
Slide bitefork arm through hole in clamp #2 Place earpiece in ears Tighten center wheel Loosen anterior reference pointer screw and points towards reference mark on face
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Procedure Assemble facebow on patient
Raise or lower bow to align with anterior reference mark Tighten clamp #1 Tighten clamp #2 Record intercondylar distance Care must be taken to support vertical arm while tightening clamps
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Procedure Remove facebow and transfer jig assembly from patient
Loosen center wheel and open bow
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Procedure Remove facebow and transfer jig assembly from patient
Remove from patient
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Procedure Remove facebow and transfer jig assembly from patient
Loosen finger screw on bow and detach transfer jig assembly from bow
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Procedure Remove facebow and transfer jig assembly from patient
Keep in safe place for mounting cast later
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