How to Take a Protrusive Bite Record [Ed.] (2024)

FAQs

How to Take a Protrusive Bite Record [Ed.]? ›

A protrusive bite record is taken with Master wax with the mandible pushed forward into a protrusive movement so that the condyle has moved down the eminence. Out of the box, this wax has a little bit of give and needs to be made more malleable by warming it with a dental torch.

Protrusive interocclusal record is defined as registration of the mandible in relation to the maxillae when both condyles are advanced in the glenoid fossa.

The protrusive record allows a clinician to extrapolate all mandibular movements: maximum intercuspal position (MIP), protrusive end to end, lateral excursive, and the pathways to them.

Protrusion. Front teeth that stick out (“buck” teeth). Teeth may appear protrusive because the upper jaw is too far forward, the lower jaw is too far back, the teeth grew in at an angle, or a combination of these conditions. Sometimes people who have protrusive front teeth also have a deep bite.

A protrusive bite record is taken with Master wax with the mandible pushed forward into a protrusive movement so that the condyle has moved down the eminence. Out of the box, this wax has a little bit of give and needs to be made more malleable by warming it with a dental torch.

The measurement can be made with commercially available paper rulers, metal autoclavable rulers or any number of gauges designed for measuring protrusive capacity such as the George gauge. Begin by measuring the degree of overjet present in millimeters.

A normal opening for an adult is 53 mm to 57 mm.

Along with opening movement, an individual should be able to slide their jaw to the left and to the right at least 25 percent of their total mouth opening in a symmetrical fashion.

Protrusive movement

This is the forward sliding of the mandible to come to an edge to edge incisal relationship. Ideally, the palatal surfaces of the anterior teeth provide the guidance and at the point of protrusion, all of the posterior teeth should disclude, protecting the posterior teeth from wear and fracture.

Protrusive movements were straight forward, dividing the angle evenly between left and right laterotrusion. Laterotrusive movements were of equal length and similar to the length of protrusion. Twenty-six patients with muscle pain, in many instances, demonstrated asymmetry in the length of laterotrusive movements.

What is the purpose of a bite registration? ›

The main purpose of the bite registration is to relate the fiducial markers to the teeth, but it is also used to maintain the mandible in centric relation (CR) during scanning. For this purpose, a special bite fork has been designed that is placed buccally to the teeth.

Various materials can be used for bite registration, including: plaster of Paris (impression plaster), model compounds, waxes, zinc oxide eugenol pastes, acrylic resins and elastomers.

Protrusion of the upper front teeth, also called excessive overjet, is characterized by an excessive overlap of the top teeth over the bottom teeth. Both types of protrusion can be caused by the misalignment of the jaw or of the teeth, which can arise due to trauma to the mouth, tooth fracture, or a skeletal condition.

Protrusive guidance should immediately separate posterior teeth and in lateral movement the working guidance should immediately disclude teeth on the non-working side. The steepness of anterior guidance directly influences the angle of the cuspal inclines.

Protrusion is the excessive horizontal overlap between top and bottom front teeth, and is typically caused by the upper front teeth or upper jaw being too far forward or the lower front teeth or lower jaw being too far back, or both.

VDR or physiologic rest position of the mandible is the position when the elevator and depressor muscles are in a state of equilibrium or balance. this position most commonly results in a separation of the maxillary and mandibular teeth of about 3mm at the first premolar region.

Jaw relation records, or interocclusal records, have the following functions: (1) They provide the stability or support that the casts of the remaining dentition lack, (2) they reduce chair time for the delivery of the restoration, (3) they reduce the likelihood of making restorations in hyperocclusion or with- out ...