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The Facebow Record

The Facebow Record. Dr. Richard G. Stevenson III. THE FACEBOW RECORD. Purpose. To accurately mount the maxillary cast to articulator. Fossa. Upper Bow. Incisal Pin. Centric Latch. Bitefork. Transfer Jig Assembly. Mounting Plate (ring). Articulator Index. Facebow Transfer.

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The Facebow Record

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  1. The Facebow Record Dr. Richard G. Stevenson III

  2. THE FACEBOW RECORD

  3. Purpose • To accurately mount the maxillary cast to articulator

  4. Fossa Upper Bow Incisal Pin Centric Latch Bitefork Transfer Jig Assembly Mounting Plate (ring) Articulator Index

  5. 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.

  6. 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. [1770-80; ARTICULATE + OR2]

  7. Slidematic Measuring Bowcomponents • Earplug • Anterior reference pointer • Intercondylar distance scale • Finger lockscrew • Center lock wheel • Sight • Reference plane locator and marker

  8. SLIDEMATIC FACEBOW EAR PLUGS ANTERIORREFERENCE POINTER

  9. SIGHT CENTER LOCKWHEEL FINGER LOCKSCEREW

  10. INTERCONDYLARDISTANCE SCALE

  11. ANTERIORREFERENCE POINTER

  12. Transfer Jig Assemblycomponents • Bitefork • Vertical shaft • #1 and # 2 clamps • Finger screws • Articulator index

  13. TRANSFER JIG ASSEMBLY BITEFORK VERTICALSHAFT CLAMP #2 CLAMP #1 FINGER SCREWS ARTICULATORINDEX

  14. Procedure

  15. Facebow Landmarks • External auditory meatus • Arbitrary hinge axis location • Anterior reference point • Maxillary arch

  16. Procedure • Mark anterior reference point • 43 mm above incisal edge of tooth # 7 or #8

  17. 43 mm

  18. Procedure • Cover bitefork with 2 layers of softened baseplate wax • Use warm water (135 degrees)

  19. Procedure • Insert fork in mouth with the arm to the patient’s right • Align midline with index notch • Keep fork horizontal

  20. 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

  21. Procedure • Attach the vertical shaft to the measuring bow • #2 clamp to patient’s right • Tighten finger screw

  22. Procedure • Prepare bow and transfer jig • Loosen screws #1 and #2 on clamps • Loosen bow center wheel with thumb • Slide bow open

  23. 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

  24. 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

  25. Procedure • Remove facebow and transfer jig assembly from patient • Loosen center wheel and open bow

  26. Procedure • Remove facebow and transfer jig assembly from patient • Remove from patient

  27. Procedure • Remove facebow and transfer jig assembly from patient • Loosen finger screw on bow and detach transfer jig assembly from bow

  28. Procedure • Remove facebow and transfer jig assembly from patient • Keep in safe place for mounting cast later

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