Benefits of using the face bow with a semi-adjustable jaw
1. Accurately reproduce the three-dimensional relationship between the maxillary and condylar hinge axis of the patient
2. Accurately reproduce the anatomical movement of the jaw of the patient to the upper jaw (closed arc)
3. Obtain flexibility to adjust the mandibular motion path or allow adjustment of the position of the condyle if necessary
4. The patient research model is accurately placed on the articulator, and it is more evidence-based when communicating between doctors, patients, and doctors to discuss necessary treatments.
5. Provide a horizontal reference for the anterior axis tilt
6. Quality Management – Emphasis on the patient’s functional characteristics in the occlusion reconstruction work – starting with the face bow, eight simple steps to achieve a higher quality of repair.
The first step: heating the occlusion recording paste or impression paste with an alcohol lamp
• Place the soft, occlusal recording paste on the three sites of the occlusal fork
Key points: Set the wax at a high level at the “center point” to ensure that the teeth do not pick up (bite the ointment) and touch the teeth. Buy Dental Equipment
Step 2: Set three occlusion recording pastes on the clean and dry occlusal fork to extend the paste to the center of the occlusal fork.
• Helps to clean up with 100 ̊F hot water and occlude recording paste after use
The third step: the dental fork carrying the softened occlusion recording paste is placed in the patient’s mouth.
• Let the upper jaw leave a shallow impression on the bite recording paste
Key points: Note that the teeth should not touch the occlusal fork metal, otherwise the plaster model will slide on the occlusal fork impression.
Step 4: Remove the occlusal fork from the patient’s mouth
• Allow the bite recording paste to cool before placing it in the mouth
• Place a thick lap in the occlusal fork and the patient’s double canine area to stabilize the occlusal fork
• The patient needs to bite the occlusal fork with his teeth
• Key points: the occlusal fork is indeed stable between the upper and lower teeth without twisting
Step 5: Tighten the universal joint in the direction away from the patient (away from the patient’s face)
• Position the face bow on the patient’s head
Key points: Mobilize the patient, let him help put the mast in the outer ear hole, calm the self-selected bow frame
Step 6: Hold the handle of the nose piece like a syringe
• Carefully press the nose piece between the nose and forehead to lift the forehead skin
• Tighten the fixing bolts of the nose piece until the face arch is stable on the patient’s head
• Gently rock the face bow to confirm that it is stable
Important: If you don’t want to put the nose piece too tightly on the patient’s nose, you can flatten the treatment table so that the patient’s face is facing up so that the gravity of the face bow naturally brings it to the right position.
Step 7: Insert one end of the universal body into the running-in gap of the occlusal fork
• Tighten the lock body of the gimbal body to make it tightly connected to the occlusal fork
Important: Before locking the gimbal body, turn the lock body knob to the side of your right hand (for those who are used to the right hand)
At this point, the face bow record has been completed.
Step 8: Take the bow below
• First loosen the nose bridge
• Loosen the screw of the self-centering adjustment bracket and open the frame.
• Let the patient open his mouth
• Carefully remove the face arch that holds the gimbal body forward and downward from the patient’s face.