Occlusion Flashcards
What is occlusion?
The static relationship between teeth.
What is articulation in functional occlusion?
The relations of the teeth during function.
What movements does the omnivorous diet cause in the mouth?
Hinging (opening and closing) and lateral movement (sliding).
What are the three hierarchical levels of occlusion?
Functional occlusal morphology, properly organized arch, and inter-arch confrontation تواجه .
What is the role of primary cusps?
Facilitate eruption, mastication, reduce fracture risk, and stabilize dental arches.
What are secondary cusps also known as?
Non-supporting or nonfunctional cusps.
What is the occlusal area?
The masticatory ‘active’ part of the tooth, limited by marginal ridges.
What is the main function of anterior teeth?
Prehension -taking hold- and incising phases of mastication, and occlusal guidance.
What is the curve of Spee?
A curved arrangement including buccal cusps of mandibular cuspids, facilitating disocclusion.
What is Angle’s class I occlusion?
Central cusp of mandibular first molar contacts the central fossa of maxillary first molar.
What is Angle’s class II occlusion?
Distal displacement where the mandibular molar groove is posterior to the maxillary molar cusp .
What is Angle’s class III occlusion?
Mesial displacement where the mandibular molar buccal groove is anterior to the maxillary molar buccal cusp.
What are the primary molar relationships in deciduous teeth?
Flush terminal plane, distal step, and mesial step.
What does a flush terminal plane indicate for permanent teeth?
56% progress to class I and 44% to class II molar relationships.
What is overjet?
The horizontal overlap between the labial surfaces of mandibular and maxillary incisors.
