point angle

angle /an·gle/ (ang´g'l)

1. the point at which two intersecting borders or surfaces converge.

Scapula, showing the lateral, superior, and inferior angles.

2. the degree of divergence of two intersecting lines or planes.

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acromial angle  the subcutaneous bony point at which the lateral border becomes continuous with the spine of the scapula.

axial angle  any line angle parallel with the long axis of a tooth.

cardiodiaphragmatic angle  that formed by the junction of the shadows of the heart and diaphragm in posteroanterior radiographs of the chest.

costovertebral angle  that formed on either side of the vertebral column between the last rib and the lumbar vertebrae.

angle of eye  canthus.

filtration angle  a narrow recess between the sclerocorneal junction and the attached margin of the iris, at the periphery of the anterior chamber of the eye; it is the principal exit site for the aqueous fluid.

iridial angle , iridocorneal angle, angle of iris filtration a.

line angle  an angle formed by the junction of two planes; in dentistry, the junction of two surfaces of a tooth or of two walls of a tooth cavity.

Louis' angle , Ludwig's angle sternal a.

optic angle  visual a.

point angle  one formed by the junction of three planes; in dentistry, the junction of three surfaces of a tooth, or of three walls of a tooth cavity.

angle of pubis  subpubic a.

sternal angle  the angle between the sternum and manubrium.

subpubic angle  that formed by the conjoined rami of the ischial and pubic bones.

tooth angles  those formed by two or more tooth surfaces.

venous angle  the angle formed by junction of the internal jugular and subclavian veins.

visual angle  the angle formed between two lines extending from the nodal point of the eye to the extremities of the object seen.

Y angle  that between the radius fixus and the line joining the lambda and inion.

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point angle

n.

The junction of three surfaces, as of the crown of a tooth or the walls of a cavity.

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angle,

n the degree of divergence of two or more lines or planes that meet each other; the space between such lines. Measured in degrees of an arc.

angle, bayonet former,

n a hoe-shaped, paired cutting instrument; biangled with the blade parallel with the axis of the shaft. The cutting edge is not perpendicular to the axis of the blade. Used to accentuate angles in an “invisible” class 3 cavity.

angle, Bennett,

n the angle formed by the sagittal plane and the path of the advancing condyle during lateral mandibular movement, as viewed in the horizontal plane.

angle board,

n a device used to facilitate the establishment of reproducible angular relationships between a patient's head, the radiographic beam, and the radiograph film.

angle, cavosurface

n the angle in a prepared cavity, formed by the junction of the wall of the cavity with the surface of the tooth.

angle, contact,

n the angle at which a liquid or vapor meets a solid surface; e.g., the angle at which a droplet of water rests on an oily surface.

angle, cranial base,

n the angle formed by a line representing the floor of the anterior cranial fossa intersecting a line representing the axis of the clivus of the base of the skull.

angle, cusp,

n 1. the angle made by the slopes of a cusp with the plane that passes through the tip of the cusp and is perpendicular to a line bisecting the cusp; measured mesiodistally or buccolingually. Half of the included angle between the buccolingual or mesiodistal cusp inclines.
n 2. the angle made by the slopes of a cusp with a perpendicular line bisecting the cusp; measured mesiodistally or buccolingually.

angle, facial,

n an anthropometric expression of the degree of protrusion of the lower face, assessed by measuring the inclination of the facial plane relative to a horizontal reference plane.

angle, former,

n a paired, hoe-shaped cutting instrument that has the cutting edge at an angle other than a right angle in relation to the axis of the blade.

angle, Frankfort-mandibular incisor (FMIA)

n a measure of the mandibular incisor to the Frankfort horizontal plane.

n the degree of slope between the axis-orbital plane and the palatal discluding skidway of the maxillary incisor.

angle, incisal guidance,

n the angle formed with the occlusal plane by drawing a line in the sagittal plane between the incisal edges of the maxillary and mandibular central incisors when the teeth are in centric occlusion.

angle, incisal guide,

n the inclination of the incisal guide on the articulator.

angle, lateral incisal guide,

n the inclination of the incisal guide in the frontal plane.

angle, line,

n an angle formed by the junction of the two walls along a line; designated by combining the names of the walls forming the angle.

angle, occlusal rest,

n the angle formed by the occlusal rest with the upright minor connector.

angle of mandible,

n an angle at the intersection of the posterior and inferior borders of the ramus.

angle, point,

n an angle formed by the junction of three walls at a common point; designated by combining the names of the walls forming the angle.

angle, prophylaxis

n the term for an angled instrument that holds a rubber cup or bristle brush used to polish teeth. It may be either contra- or right-angled. May also be called a
prophy angle.

angle, protrusive incisional guide,

n the inclination of the incisal guide in the sagittal plane.

angle, rest,

n See angle, occlusal rest.

angle, symphyseal

n the angle of the chin, which may be protruding straight or receding, according to type.

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point,

n 1. a small spot or a small area.
n 2. a rotating instrument having a small cutting end or surface.

point A,

n the deepest point in the bony concavity in the midline at the base of the anterior nasal spine, in the region of the incisor roots. A landmark on the lateral cephalometric view.

point, abrasive, rotary,

n small abrasive instruments used in straight or contraangle handpieces. Also called
mounted carborundum, diamond.

point angle,

n See angle, point.

point B,

n a mandibular point comparable to point A.

point, bleeding,

n See bleeding points.

point, Bolton,

n the highest point of the curvature between the occipital condyle and the basilar part of the occipital bone and located behind the occipital condyle. A substitute for the basion point when it cannot be ascertained on cephalometric headplates.

point, central-bearing,

n the contact point of a central-bearing device. See also central-bearing device.

point, condenser,

n the nib of a condensing instrument, which is a short instrument for condensing foil or amalgam that is inserted into a mechanical condenser or into a cone socket handle.

point, contact,

n the area of contact of approximating surfaces of two adjacent teeth. The areas of contact are located at the line of junction between the occlusal and middle thirds of the posterior teeth and the incisal and middle thirds of the anterior teeth. Also called
contact area. See also open contact.

point, convenience,

n a small undercut in the cavity wall convenient for placing and retaining the first portion of a filling material. It is generally one of the retention points placed in a cavity preparation that provides the best access to the operator.

point D,

n the center of the body of the symphysis.

point, faulty contact,

n a defective contact between the proximal surfaces of adjacent teeth, produced by wearing of the contact areas, dental caries, improper restoration, or altered tooth position. See also open contact.

point, gutta-percha,

n See gutta-percha points.

point, hinge axis,

n a point placed on the skin corresponding with the opening axis of the mandible.

point, Hirschfeld's silver,

n.pr a calibrated silver rod used to record the clinical depth of periodontal pockets radiographically for the purpose of diagnosis.

point, incisor,

n the intersection of the mandibular occlusal and midsagittal planes. The point at the mesioincisal angles of the two mandibular central incisors.

point, loss of contact,

n the failure of contact of convex proximal surfaces of adjacent teeth; produced by tooth migration, dental caries, or improper restoration.

point, median mandibular,

n a point on the anteroposterior center of the mandibular ridge in the median sagittal plane.

point of centricity,

n if the point of the buccal cusp of the mandibular right molar, put in lateral position, arcs around the upright axis of the right condyle, it will reach a station where further muscular efforts leftward will change the cusp's direction so that it will arc around the left condyle. The station where the right arc ends and the left arc begins is a point of mandibular centricity. While the right cusp point orbits (arcs) around the near vertical axis, all other points in the jaw join in orbiting (arcing). The left condyle arcs rearward until it reaches a cranial backstop; then the muscles start rotating it and carrying it leftward, and the right condyle begins arcing forward, downward, and medially. In the right and left swings of the jaw, a condyle reciprocally alternates between being a rotator and an orbiter. The point of centricity of the mandible is demonstrated usually on a horizontal plane, but it can be demonstrated on all three planes of projection. The point of centricity is rearmost, midmost (between the arcs of motion), and uppermost. See also face-bow and relation, centric.

point, paper,

n See paper point.

point, registration,

n a point considered as fixed for a particular pattern of analysis. Also, the midpoint of a perpendicular line from the sella turcica to the Bolton-nasion plane.

point, transition,

n See Tg value.

point, treatment,

n a piece of paper point, selected for the root canal being treated, that carries or holds the medication in place.

point, trial,

n a cone of filling material placed in a canal and radiographed to check on the length and fit of the filling.

point, trigger,

n the point from which referred pain initiates. In the myofascial pain syndrome, usually a localized, deep tenderness in a taut bundle of muscle fibers from which pain is referred to other sites.

point, yield,

n 1. the place on the stress-strain curve where marked permanent deformation occurs. It is just beyond the proportional limit.
n 2. the point where permanent deformation starts in a metal.