ABP Occlusion and Biomechanics Flashcards
6 cards from real ABP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 ABP Occlusion and Biomechanics flashcards as text
Miller's classification of tooth mobility assigns Grade III to which clinical presentation?
Answer: Movement greater than 1 mm with vertical displacement
Miller Grade III mobility indicates movement exceeding 1 mm in any horizontal direction AND depressibility or vertical movement, representing the most severe mobility category.
What does the term 'cuspal interference in lateral excursion' refer to in occlusal analysis?
Answer: Contact of posterior teeth on the non-working side during lateral movement
Non-working side (balancing side) interferences occur when posterior teeth contact during lateral excursion on the side away from which the mandible is moving, creating harmful lateral forces.
In a periodontally compromised dentition requiring full-mouth rehabilitation, which occlusal scheme is most commonly recommended to minimize lateral forces?
Answer: Canine-protected (mutually protected) articulation
Canine-protected articulation distributes lateral forces to the most favorable teeth (canines) and discludes posterior teeth during excursions, minimizing harmful lateral stresses on compromised posterior periodontium.
Which radiographic feature is MOST characteristic of secondary occlusal trauma in a patient with advanced periodontitis?
Answer: Angular (infrabony) bone defects with widened PDL space
Secondary occlusal trauma on a reduced but inflamed periodontium typically produces angular infrabony defects combined with a widened PDL space from excessive force on compromised bone support.
When is occlusal adjustment (equilibration) indicated in periodontal therapy according to AAP guidelines?
Answer: When fremitus or occlusal prematurity contributes to progressive bone loss after inflammation is controlled
Occlusal adjustment is indicated selectively after inflammation is controlled when specific occlusal interferences are identified as contributing to progressive attachment loss or mobility.
The 'envelope of function' concept in occlusion refers to which of the following?
Answer: The range of mandibular movements occurring during normal masticatory function
The envelope of function describes the three-dimensional border movements and functional chewing patterns of the mandible, defining the range within which normal occlusal contacts occur.