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Articulators Manual  /certified fixed orthodontic courses by Indian dental academy
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Articulators Manual /certified fixed orthodontic courses by Indian dental academy

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Welcome to Indian Dental Academy ...

Welcome to Indian Dental Academy
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 has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients

State of the art comprehensive training-Faculty of world wide repute &Very affordable.

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  • 1. ARTICULATORS INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www,indiandentalacademy.com
  • 2. Model #2240 www,indiandentalacademy.com
  • 3. Model #2340 www,indiandentalacademy.com
  • 4. Obtaining a Face-Bow Registration •Preparing the Face-Bow •Preparing the Face-Bow Fork •Positioning the Face-Bow on the Patient •Removing the Face-Bow from the Patient www,indiandentalacademy.com
  • 5. www,indiandentalacademy.com Items needed for a Face-Bow registration
  • 6. www,indiandentalacademy.com Clean and properly disinfect the plastic ear pieces before each use.
  • 7. www,indiandentalacademy.com
  • 8. A rubber band may be easily positioned on the face-bow to aid in its www,indiandentalacademy.com manipulation.
  • 9. Center the nasion www,indiandentalacademy.com cross bar. relator assembly on the
  • 10. Loosen the #8604 thumb screw. If the metal face-bow is being used, you will www,indiandentalacademy.com need to loosen the three thumb screws on top.
  • 11. Loosen www,indiandentalacademy.com the #8640 thumb screw.
  • 12. Loosenwww,indiandentalacademy.com the #8643 thumb screw.
  • 13. www,indiandentalacademy.com Elastomeric registration material may be used as a bite registration medium for the bite fork.
  • 14. www,indiandentalacademy.com Apply elastomeric registration material to the top surface of the bite fork.
  • 15. Position the bite fork so that the midline of the bite fork aligns with the facial www,indiandentalacademy.com midline and support the fork until the material has set.
  • 16. Inspect the registration for any soft tissue or deep occlusal registrations. www,indiandentalacademy.com Record only the maxillary cusp tips.
  • 17. Explain the procedure with www,indiandentalacademy.com patient that the the patient. Caution the plastic ear pieces in the auditory canal will amplify noises.
  • 18. www,indiandentalacademy.com You may want to support the bite fork underneath by using cotton rolls.
  • 19. A finger cot placed over each ear will help facilitate proper disinfection www,indiandentalacademy.com of the face-bow.
  • 20. With the bite fork in the patient’s mouth, start the toggle onto the bite fork www,indiandentalacademy.com shaft while the patient holds the side arms close to the ears.
  • 21. Make sure the horizontal bar www,indiandentalacademy.com fork shaft. Instruct the is rod is above the bite patient to hold in place with a firm forward pressure.
  • 22. Center the plastic nose piece on the patient’s nasion and exert firm pressure www,indiandentalacademy.com on the nose piece while tightening the thumb screw.
  • 23. www,indiandentalacademy.com Tighten the #8604 thumb screw on top of the face-bow.
  • 24. www,indiandentalacademy.com Push the #8642 toggle back on the fork shaft until it is near, but not touching the lips.
  • 25. To prevent torquing of the face-bow and discomfort to the patient, support the www,indiandentalacademy.com fork and the horizontal bar with one hand while tightening the thumb screw.
  • 26. Next, tighten the #8643 thumb screw on the vertical rod while supporting the www,indiandentalacademy.com face-bow.
  • 27. www,indiandentalacademy.com The completed face-bow registration.
  • 28. Loosen the #8604 thumb screw and slide the nasion relator away from the www,indiandentalacademy.com patient’s nose.
  • 29. www,indiandentalacademy.com Have the patient hold both arms of the face-bow and loosen the center screw on top of the face-bow.
  • 30. www,indiandentalacademy.com Have the patient pull the ear pieces out of their ears while helping to remove the bite fork from the mouth.
  • 31. Obtaining Interocclusal Records There are several materials available that may be used to make interocclusal records. There are also different techniques and philosophies for making these records. The material selected should complement the particular technique used. The technique suggested in this manual in one method and Whip Mix does not imply that this is the only correct method. The following interocclusal records should be utilized to relate the mandibular cast to the maxillary mounting and to program the condylar guidance of the articulator. Centric Relation and/or Maximum Intercuspation Right lateral Left lateral www,indiandentalacademy.com Protrusive (optional)
  • 32. Obtaining Interocclusal Records Centric Relation and/or Maximum Intercuspation www,indiandentalacademy.com
  • 33. Many clinicians prefer to use an anterior deprogramming device such as a leaf www,indiandentalacademy.com gauge to help the patient achieve a centric relation position.
  • 34. Place the leaf gauge between the maxillary and mandibular incisors. Instruct the patient to protrude and then retrude the mandible while closing on the leaf www,indiandentalacademy.com gauge.
  • 35. www,indiandentalacademy.com Additional leaves are required if posterior contacts are present. Ideal disocclusion is 0.5 mm in posterior.
  • 36. Instruct the patient to move his mandible forward, back, and squeeze. This cycle should be repeated once a minute for a total of ten minutes. The patient should be instructed to bite with only enough force to hole the leaf gauge in position. www,indiandentalacademy.com During the ten minute period verify that posterior disocclusion is maintained.
  • 37. Wipe dry the teeth with cottonwww,indiandentalacademy.com gauze to make the centric relation record. Do not allow the patient to occlude while the leaf gauge in not in position.
  • 38. www,indiandentalacademy.com Inject elastomeric registration material onto the mandibular occlusal surfaces.
  • 39. With leaf gauge in position, instruct the patient to close. The patient is then www,indiandentalacademy.com instructed to protude, retrude, squeeze together, hold until the material is set.
  • 40. Remove and examine for: the presence of adequate cuspal indents and the www,indiandentalacademy.com absence of perforations through the material.
  • 41. Obtaining Interocclusal Records Right and Left lateral Records www,indiandentalacademy.com
  • 42. Manipulate the mandible into centric relation. Inject elastomeric registration material onto the mandibular www,indiandentalacademy.com occlusal surfaces. Instruct the patient, while open, to slowly move the jaw toward his right shoulder.
  • 43. After moving 4-6mm laterally, instruct the patient to close into the elastomeric www,indiandentalacademy.com until “cuspal indents” have been created. Hold this position until the registration
  • 44. Remove and examine the right lateral record for: the presence of adequate cuspal indents and the absence of perforation and/or soft tissue undercuts. www,indiandentalacademy.com Repeat procedure for left lateral check record.
  • 45. Direct Mounting the Maxillary Cast on the 2000 Series Articulator www,indiandentalacademy.com
  • 46. www,indiandentalacademy.com Items needed for mounting casts on the articulator.
  • 47. www,indiandentalacademy.com Set the centric latch in the “open” position.
  • 48. www,indiandentalacademy.com Detach the bilateral elastics from the lower frame.
  • 49. www,indiandentalacademy.com Loosen the #8511 incisal guide pin screw and remove the incisal guide pin.
  • 50. Set each condylar guide to the “FB” (Face-Bow) marking on the condylar www,indiandentalacademy.com inclination scale.
  • 51. If using the Model #2340, setwww,indiandentalacademy.com to the 30° mark. the condylar inclination
  • 52. Firmly tighten each clamp screw. This may be accomplished by using the www,indiandentalacademy.com black thumb screws or the hex drive.
  • 53. The immediate side shift setting are irrelevant at this point. However it is www,indiandentalacademy.com advisable to set them to the “0” mark.
  • 54. www,indiandentalacademy.com Set the progressive side shift to the “0” mark on the Model #2340.
  • 55. If using the QuickMount Magnet System as is demonstrated here, place a metal www,indiandentalacademy.com mounting disk into the plastic mounting plate.
  • 56. Attach the QuickMount Magnet Plates to the articulator. The articulator is now www,indiandentalacademy.com ready to have the face-bow attached.
  • 57. Placing a Direct Mounting Face-Bow on the Articulator www,indiandentalacademy.com
  • 58. www,indiandentalacademy.com Slide the nasion relator assembly over the side of the horizontal crossbar.
  • 59. Loosen the thumb screw on www,indiandentalacademy.com rubber band properly top of the face-bow. A positioned aids in manipulation.
  • 60. Guide the face-bow beneathwww,indiandentalacademy.com articulator. The ear pieces the upper frame of the should be even with the brass mounting pins.
  • 61. Position the brass mounting pin into the hole on the medial side of the left plastic ear piece. While holding the left side of the face-bow in place, guide the right www,indiandentalacademy.com brass mounting pin into the hole in the right face-bow ear piece.
  • 62. Ensure the anterior end of the upper frame will rest on the horizontal cross bar www,indiandentalacademy.com of the face-bow.
  • 63. Securely tighten the thumb on top of the face-bow. If using the metal face-bow www,indiandentalacademy.com you will need to tighten the three thumb screws on top of the face-bow.
  • 64. Because the guidance of this instrument is part of the upper frame and the face-bow is, in effect, one piece with the frame, the face-bow fork is in a fixed www,indiandentalacademy.com relation to the upper frame.
  • 65. The face-bow only relates to the upper frame and not to the lower member of the articulator. The lower member will only serve as a convenient support during the www,indiandentalacademy.com mounting on the maxillary cast.
  • 66. www,indiandentalacademy.com Engage the centric latch for added stability.
  • 67. The Face-Bow Fork Support is a convenient accessory used to support the bite fork during the mounting of the upper cast. Once attached to the articulator its www,indiandentalacademy.com cross arms can be raised to gently contact the under surface of the face-bow fork.
  • 68. Mounting the Maxillary Cast with a Direct Mounting Face-Bow www,indiandentalacademy.com
  • 69. Indices should be placed in cast if it will need to be recovered and replaced. www,indiandentalacademy.com Otherwise retentive undercuts should be placed in the cast base.
  • 70. www,indiandentalacademy.com Soak the maxillary cast in clean slurry water.
  • 71. Seat the cast in the face-bow registration and make sure it is stable with no rocking. If the upper frame will not close to where the upper frame rests on the www,indiandentalacademy.com cross bar, the cast will need additional trimming.
  • 72. www,indiandentalacademy.com Ensure you have all materials needed to mount the maxillary cast.
  • 73. Apply Whip Mounting Stone to the base of the cast and to the mounting plate. Slowly close the upper framewww,indiandentalacademy.com until it contacts the cross bar. You may want to hold the frame in position until the mounting stone has set.
  • 74. It is not necessary that the mounting stone be smooth and all voids filled with the first mix. Many clinicians prefer to utilize a second mix to fill the voids after the www,indiandentalacademy.com first mix has set.
  • 75. Indirect Mounting the Maxillary Cast on the 2000 Series Articulator www,indiandentalacademy.com
  • 76. The indirect mounting technique offers the user more access, increased stability, www,indiandentalacademy.com greater ease of use, and optimum instrument efficiency.
  • 77. All Whip Mix Face-Bows can be modified to have indirect mounting capabilities. Items needed to convert a direct mounting face-bow over to a indirect mounting face-bow include: a transfer base assembly, a transfer assembly and a cross bar www,indiandentalacademy.com (not shown).
  • 78. Preparing the Face-Bow and Articulator for Mounting Casts www,indiandentalacademy.com
  • 79. www,indiandentalacademy.com Unscrew the #8406 Locking Screw on the cross bar to remove the bite registration from the face-bow.
  • 80. Position the #8686 Support Bar onto the top of the transfer assembly and secure www,indiandentalacademy.com in place using the same #8604 Locking Screw.
  • 81. Remove the upper frame of the articulator and remove the incisal guide pin. Place the transfer base assembly on the lower member and secure it. The magnetic face-bow fork support is demonstrated here. Set the articulator as www,indiandentalacademy.com previously described.
  • 82. Placing the Face-Bow Transfer Assembly on the Articulator www,indiandentalacademy.com
  • 83. Insert the vertical rod of the transfer assembly into the transfer base and lower it www,indiandentalacademy.com until the bottom of the vertical rod contacts the transfer base. Secure it by tightening the #9184 Clamp Screw.
  • 84. Replace the upper frame onto the lower frame so the front of the upper frame now rests on the #8686 Support Bar. Place a plastic mounting plate on the www,indiandentalacademy.com upper frame.
  • 85. If using the face-bow fork support, raise it until it touches the undersurface of www,indiandentalacademy.com the face-bow fork.
  • 86. Engage the centric latch on the articulator to keep the condyles in contact with www,indiandentalacademy.com the posterior and superior walls of the condylar guides.
  • 87. Mounting the Maxillary Cast www,indiandentalacademy.com
  • 88. Position the upper cast into the bite registration. Ensure it is stable with no www,indiandentalacademy.com rocking.
  • 89. Apply Whip Mounting Stone to the base of the cast and to the mounting plate. Slowly close the upper framewww,indiandentalacademy.com until it contacts the support bar. You may want to hold the frame in position until the mounting stone has set.
  • 90. It is not necessary that the mounting stone be smooth and all voids filled with the first mix. Many clinicians prefer to utilize a second mix to fill the voids after www,indiandentalacademy.com the first mix has set.
  • 91. Mounting the Mandibular Cast www,indiandentalacademy.com
  • 92. After the stone has set, remove the upper frame to allow removal of the transfer assembly and transfer base assembly. Replace the incisal guide pin (rounded end down) and re-attach the www,indiandentalacademy.com upper frame to the lower. You can now proceed with the instructions on mounting the lower cast.
  • 93. The guide pin should be adjusted 3-5mm above the zero mark (the dark line encircling the pin) to compensate for the thickness of the centric relation (CR) or www,indiandentalacademy.com maximum intercuspation (MI) registration used to the mount the mandibular cast.
  • 94. www,indiandentalacademy.com Make sure the centric latch is engaged.
  • 95. www,indiandentalacademy.com Set both immediate side shift guides to the “0” position.
  • 96. If using the Model #2340 Articulator, set both progressive side shift guides to the www,indiandentalacademy.com “0” position.
  • 97. www,indiandentalacademy.com Reattach the bilateral elastics to the lower frame.
  • 98. Place the articulator upside www,indiandentalacademy.com down, resting on the incisal guide pin and the two clamp screws.
  • 99. If you haven’t done so already, trim the interocclusal records so that only the cusp tips are remaining and place the CR or MI interocclusal registration on the www,indiandentalacademy.com maxillary cast. Make sure the record is completely seated on the maxillary cast.
  • 100. Place retention grooves on the base of the cast, position the cast on the CR or MI registration and verify that the cast is completely seated. Many clinicians like to use some a method of their choosing to secure the mandibular cast to the www,indiandentalacademy.com registration record.
  • 101. Hinge the lower frame open and apply mounting stone to the base of the www,indiandentalacademy.com mandibular cast and to the lower mounting plate.
  • 102. Hinge the lower frame closed until the incisal guide pin meets the incisal guide block. Make sure the condylar elements are seated flush against the posterior and superior walls of the condylar guides. Hold the articulator in place until the www,indiandentalacademy.com stone has set.
  • 103. Fill any voids to achieve an www,indiandentalacademy.com Remove the material used aesthetic appearance. to secure the cast in place and remove the interocclusal records.
  • 104. Loosen the incisal guide pin screw and lower the pin until the maxillary and mandibular casts contact. Retighten the incisal guide pin screw and make sure www,indiandentalacademy.com the incisal guide pin is position in the center of the incisal guide table.
  • 105. Setting the Condylar Guidance of the Articulator Using Lateral Interocclusal Records www,indiandentalacademy.com
  • 106. Release the centric latch. www,indiandentalacademy.com
  • 107. Detach the bilateral elasticswww,indiandentalacademy.com from the lower frame.
  • 108. Set both condylar guides to the 0° setting indicated on the condylar inclination www,indiandentalacademy.com scale. Firmly tighten the right condylar guide locking screw and lightly secure the left condylar guide locking screw.
  • 109. Set both immediate side shiftwww,indiandentalacademy.com guides to their most open position.
  • 110. If using the Model # 2340 Articulator, set the progressive side shift guides to www,indiandentalacademy.com the most open position.
  • 111. Loosen the incisal guide pinwww,indiandentalacademy.com screw. Raise the incisal guide pin to prevent any interference and retighten the screw.
  • 112. www,indiandentalacademy.com With the upper frame and its cast inverted, carefully seat the right lateral excursion interocclusal records on the upper cast.
  • 113. Holding the upper frame in one hand and the lower frame in the other, place the right condylar element in the right condylar guide. Make sure the right condyle is seated “flush” against the rear wall. Gently seat the lower cast into the right lateral record and lightly holdwww,indiandentalacademy.com in position on the right the articulator and casts side.
  • 114. Notice that the left condylar element has moved away from both the superior and posterior surfaces of the www,indiandentalacademy.com condylar guide and toward the medial wall.
  • 115. www,indiandentalacademy.com To set the inclination of the left condylar guide, carefully loosen its locking screw.
  • 116. www,indiandentalacademy.com Rotate the guide until the superior wall touches the condyle element.
  • 117. Tighten the condylar guide locking screw to clamp the guide in position. www,indiandentalacademy.com DO NO USE EXCESSIVE PRESSURE when tightening the locking screw.
  • 118. To set the left immediate side shift, loosen the left side shift clamp screw and www,indiandentalacademy.com slide the left side shift guide until it touches the side of the condyle element.
  • 119. If using the Model #2340 Articulator, loosen the left side shift guide holding screw and move the side shift guide until it touches the side of the condyle www,indiandentalacademy.com element.
  • 120. Retighten the left side shift clamp screw and then return the articulator to its www,indiandentalacademy.com upright position.
  • 121. The right condylar guidance is adjusted using the left lateral excursion record and repeating the above procedure. It is recommended that you record the www,indiandentalacademy.com settings so as not to lose them.
  • 122. Setting the Condylar Guidance of the Articulator Using Protrusive Interocclusal Records www,indiandentalacademy.com
  • 123. First you must neutralize the condylar inclination and immediate side shift settings. Place the protrusivewww,indiandentalacademy.com upper frame and gently seat record on the inverted the lower cast into the protrusive record.
  • 124. Both condylar elements will have moved away from the posterior and superior www,indiandentalacademy.com surfaces of their respective condylar guides.
  • 125. Using sight and touch, rotate the right condylar guide until it contacts the condylar ball, then tighten the condylar locking screw. Record the reading and repeat the procedure on the left side. The lateral records are then used to www,indiandentalacademy.com determine immediate side shift settings.
  • 126. www,indiandentalacademy.com The completed mounting on a Model #2240 Articulator.
  • 127. Technique for Fabrication of a Custom Incisal Guide Table www,indiandentalacademy.com
  • 128. An acrylic custom incisal guide table may be used to make a permanent disocclusive record of a specificwww,indiandentalacademy.com case or to prevent possible abrasion of the stone casts during manipulation of the articulator.
  • 129. The Dovetail Incisal Block is a convenient accessory which has been designed so that a custom acrylic guide may be easily removed and can later be easily www,indiandentalacademy.com replaced.
  • 130. www,indiandentalacademy.com Materials needed for fabrication of a custom incisal guide table.
  • 131. www,indiandentalacademy.com Raise the incisal guide pin 2-3mm and release the centric latch.
  • 132. Lubricate the rounded end of the incisal guide pin. Next, prepare the surface www,indiandentalacademy.com of the incisal guide table with 1-2 drops of self-curing acrylic monomer.
  • 133. www,indiandentalacademy.com Mix enough acrylic to cover the incisal guide table to approximately a 6 mm thickness.
  • 134. www,indiandentalacademy.com Once the acrylic has reached a doughy state, place it onto the incisal guide table.
  • 135. www,indiandentalacademy.com Close the articulator in centric position.
  • 136. Move the upper frame to produce a straight protrusive movement terminating in www,indiandentalacademy.com an end-to-end position.
  • 137. www,indiandentalacademy.com From centric, move the upper member to give a straight right lateral movement.
  • 138. www,indiandentalacademy.com Then, move the upper member to give a straight left lateral movement.
  • 139. Move through all intermediate excursions between the lateral and protrusive positions. Repeat the excursive movements until the acrylic has reached a firm www,indiandentalacademy.com stable consistency.
  • 140. www,indiandentalacademy.com Final custom incisal guide table.
  • 141. Thank you www.indiandentalacademy.com Leader in continuing dental education www,indiandentalacademy.com