What is Interocclusal distance?

[ ĭn′tər-ə-klōō′zəl ] n. The vertical distance between the occluding surfaces of the upper and lower teeth when the mandible is in the resting position.

What is the freeway space in the mouth?

Rest position, also called as interocclusal rest position or freeway space (FWS), has been defined as the neutral position attained by the mandible as it is involuntarily suspended by the reciprocal coordination of the elevator and depressor masticatory muscles with the maxillary and mandibular teeth separated.

How is freeway space calculated?

Freeway space was determined by asking the subjects to occlude from the postural rest position. Speaking space of /s/ was measured during the pronunciation of the word “seis” and comprised the mean distance from the /s/ speaking position to maximal intercuspation.

How do you find the vertical dimension of occlusion?

Another method to determine vertical dimension that has been described is to measure from the cementoenamel junction or gingival margins of the maxillary central incisors to the CEJ or gingival margins of the mandibular central incisors.

How is interocclusal rest space related to vertical space?

Interocclusal rest space (freeway space): It is the distance between the occluding surface of maxillary and mandibular teeth when the mandible is in its physiological rest position. It is the difference between the vertical dimension of rest and the vertical dimension of occlusion. RVD – OVD = Freeway space normally≈ (2-4 mm)

What does decreased vertical dimension of occlusion mean?

Decreased vertical dimension of occlusion refers to an occluding vertical dimension that results in: • a loss of interocclusal distance when the mandible is in the rest position (decreased freeway space) • an excessive interocclusal distance when the mandible is in the rest position (increased freeway space)

Which is true about Centric Occlusion ( CO )?

Centric occlusion (CO) is a: • “muscle-guided” position • “ligament-guided” position • “tooth-guided” position “tooth-guided” position 7 All of the following statements concerning the functionally generated pathway technique are true EXCEPT one.

What’s the difference between freeway space and rest space?

Freeway space, or the interocclusal rest distance, is “the difference between the rest vertical dimension and the occlusal vertical dimension.”