Dentistry: Face Bow Function and Components

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What is the primary function of a face bow in dentistry?

To create impressions of teeth

To measure dental arch width

To record the relationship of the maxilla to the TMJ (correct)

To assess the height of occlusion

How does a face bow transfer information to the articulator?

By capturing the relationship of articulating surfaces

By capturing the maxilla's shape

By transferring the maxilla's position in relation to the TMJ (correct)

By recording occlusal forces

The face bow is commonly described as which type of device?

A hinged frame for dental impressions

A caliper-like device (correct)

An electronic scanning tool

A rigid model for orthodontic measurements

Which anatomical feature does the face bow relate to when recording jaw position?

The maxilla and the temporomandibular joint Signup and view all the answers

In the context of face bow usage, which axis is primarily noted for movement?

Hinge axis Signup and view all the answers

What is the primary function of the locking device in a face bow?

To attach the bite fork to the U-shaped frame. Signup and view all the answers

Which of the following is NOT a component of the face bow?

Incisal plane Signup and view all the answers

Which type of face bow is categorized as an arbitrary type?

Maxillary Signup and view all the answers

What role does the bite fork play in the function of a face bow?

It attaches to the occlusion rim. Signup and view all the answers

Which component of the face bow connects to the condyle?

Condylar rods or earpieces Signup and view all the answers

What is the purpose of the graduated condylar rods in the facial face bow?

To indicate the correct condylar positioning. Signup and view all the answers

Which component of the facial face bow is responsible for holding the bite fork in place?

Tightening clamp Signup and view all the answers

How is the position of the condylar rods determined?

From a point near the auditory meatus using anatomical landmarks. Signup and view all the answers

What feature on the facial face bow allows for adjustments to the length of the condylar rods?

Universal clamp Signup and view all the answers

What anatomical landmarks are used to position the condylar rods on the facial face bow?

Top of the tragus and outer canthus of the eye. Signup and view all the answers

What is the main purpose of the kinematic facebow?

To determine the exact terminal hinge axis for precise relationships. Signup and view all the answers

How does the ear-bow facebow identify hinge axis location?

By referencing the external auditory meatus. Signup and view all the answers

Which statement correctly contrasts the ear-bow and kinematic facebows?

Kinematic facebows utilize adjustable calipers for precision. Signup and view all the answers

What is a key functional difference between the two types of facebows?

The ear-bow uses fixed reference points, while the kinematic has adjustable ends. Signup and view all the answers

What procedure follows the use of a kinematic facebow?

Attaching the bite fork to the mandibular rim. Signup and view all the answers

What is the average maximum opening in the jaw for females?

35 to 45 mm Signup and view all the answers

What defines the hinge axis in jaw movement?

An imaginary line for rotational movement Signup and view all the answers

What is the average movement range from condyle to condyle during jaw motion?

20 to 25 mm Signup and view all the answers

Which component of the jaw originates from the condyloid process to the tympanic fossa?

Upper jaw component Signup and view all the answers

What is the range of translation movement in the jaw?

25 to 50 mm Signup and view all the answers