EXAM 1

Question 1

Occlusion

Answer 1

The relationship of the maxillary and mandibular teeth when they are in functional contact during activity of the mandible

Question 2

Centric relation

Answer 2

The most orthopedically stable joint position. The maxilla mandibular relationship in which the condyles articulate, with the articular discs properly interposed, in the most antero-superior position against the posterior slope of the articulation eminences.

Question 3

Centric occlusion

Answer 3

The occlusion of opposing teeth when the mandible is in centric relation. It may or may not coincide with the maximal intercuspal position.

Question 4

Maximum intercuspation

Answer 4

Maximum occlusal inter-arch contact irrespective of condylar position. It may or may not occur in the path of centric relation.

Question 5

Parametric

Answer 5

Angles
Axes
Curves
Planes

Question 6

Angles

Answer 6

Bennet angle

Question 7

Bennet angle

Answer 7

Angle formed between the sagittal plane and the average path of the advancing condyle as viewed in the horizontal plane during lateral mandibular movements.

Question 8

Axes

Answer 8

Sagittal axis
Vertical axis
Transverse horizontal axis

Question 9

Sagittal axis

Answer 9

An imaginary anteroposterior line around which the mandible may rotate when viewed in the frontal plane

Question 10

vertical axis of the mandible

Answer 10

An imaginary line around which the mandible may rotate through the horizontal plane.

Question 11

Transverse horizontal axis

Answer 11

An imaginary line around which the mandible may rotate within the sagittal plane

Question 12

Curves

Answer 12

Spee curve
Wilson curve

Question 13

Spee curve

Answer 13

Anteroposterior curve. The anatomical curve establish by the occlusal alignment of the teeth, beginning with the cusp tip of the mandibular canine and following the buccal cusp of the premolar and molar teeth, continuing through the anterior border of the mandibular ramus, ending with the anterior-most portion of the mandibular condyle.

Question 14

Wilson curve

Answer 14

Mediolateral curve. The curvature of the cusps as projected on the frontal plane expressed in both arches. The curve in the lower arch being concave and the curve in the upper arch being convex.

Question 15

Planes

Answer 15

Frontal plane (coronal)
Horizontal plane
Sagittal plane

Question 16

Frontal plane (coronal)

Answer 16

Any plane parallel to the long axis of the body and at right angles to the median plane, thus dividing the body into front and back parts

Question 17

Horizontal plane

Answer 17

Any plane passing through the body at right angles to both the median and frontal planes, thus dividing the body into upper and lower parts

Question 18

Sagittal plane

Answer 18

Any vertical plane or section parallel to the median plane of the body that divides a body into right and left portions

Question 19

Articulation

Answer 19

The static and dynamic contact relationship between the occlusal surfaces of the teeth during function

Question 20

canine protected articulation -canine guidance

Answer 20

Form of mutually protected articulation in which the vertical and horizontal overlap of the canine teeth disengage the posterior teeth in the excursive movements of the mandible

Question 21

Mutually protected articulation

Answer 21

When the posterior teeth prevent excessive contact of the anterior teeth in maximum intercuspation, and the anterior teeth disengage the posterior teeth in all mandibular excursive movements.

Question 22

Group function

Answer 22

Multiple contact relations between the maxillary and mandibular teeth in lateral movements on the working side

Question 23

Class I

Answer 23

Normal occlusion or neutrocclussion
The dental relationship in which there is normal anteroposterior relationship of the jaws, as indicated by correct interdigitation of maxillary and mandibular first molars

Question 24

Class II

Answer 24

Distoccusion
The dental relationship in which the mandibular dental arch is posterior to the maxillary dental arch in one or both lateral segments. The mandibular molar is distal to the maxillary first molar
2 divisions

Question 25

Division 1

Answer 25

Narrow maxillary arch and protruding maxillary incisors

Question 26

Division 2

Answer 26

Normal maxillary arch with maxillary central incisors and excessive vertical overlap

Question 27

Class III

Answer 27

Messioocclusion
The dental relationship in which the mandibular arch is anterior to the maxillary arch in one or both lateral segments. the mandibular first molar is mesial to the maxillary first molar. The mandibular incisors are usually in anterior cross bite.