Vestibule is any of various bony cavities, especially when serving as or resembling an entrance to another.

Vestibule is the portion of the oral cavity that is bounded on the medial side by the teeth, gingiva, and alveolar ridge or the residual ridge, and on the lateral side by the lips and cheeks.

Vestibuloplasty is a surgical procedure designed to restore alveolar ridge height by lowering muscles attaching to the buccal, labial, and lingual aspects of the jaws.

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Vibrating line can be identified when the movable tissues are functioning. – denturesguide.com

Vibrating line is an imaginary line across the posterior part of the palate marking the division between the movable and immovable tissues of the soft palate. This can be identified when the movable tissues are functioning.

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Vickers hardness number: (VHN) is a measure of hardness obtained with a diamond pyramidal indenter with a square base and an angle of 136
. VHNis proportional to the ratio of the applied load to the area of the indentation. Devised in the 1920’s by engineers at Vickers, Ltd. in the United Kingdom.

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Videofluoroscopy are dynamic xrays recorded on videotape.

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Viewing conditions are various conditions under which visual observation is made including the size of the stimulus, characteristics of the surrounding area, nature of the illuminant, angle of viewing, area of the retina, etc.

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Visceral pain is deep somatic pain originating in visceral structures such as mucosal linings, walls of hollow viscera, parenchyma of organs, glands, dental pulps, and vascular structures.

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Visible spectrum is the section of the electromagnetic spectrum that is visible to the human eye. It ranges from 380 nm to 760 nm.

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Visual adaptation is adjustive change in visual sensitivity due to continued visual stimulation or lack of stimulation.

Three recognized types are:
1) scotopic or dark adaptation
2) photopic or light adaptation
3) chromatic or color adaptation

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Visual photometry is the measurement of luminous radiation based on its effect on the visual receptors.

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