Removable - Sheet1 Flashcards
What is occlusion?
Occlusion is the static contact between opposing teeth while the mandible is stationary.
What is articulation?
Articulation refers to the contact between opposing teeth when the mandible is in motion.
Name the four key functional requirements of complete dentures.
Stability, support, retention, and appearance.
How important is stability to dentures ?
Stability provides resistance to displacement during functional and parafunctional mandibular movements.
What is the role of support in dentures?
Support ensures proper base fitting against the oral tissues.
Why is retention important for dentures?
Retention ensures the denture stays securely in place under functional forces.
How does occlusion impact the stability of dentures?
Proper occlusion enhances stability by balancing forces during mandibular movements.
What are the two main categories of occlusal concepts?
Occlusion in centric position and occlusion in eccentric positions.
Define point centric occlusion concept.
The cusp tips fit precisely into the opposing fossae with defined incisal overlap.
What percentage of the population naturally has centric occlusion coinciding with centric relation?
10%
What is a “slide in centric”?
A discrepancy where centric occlusion and centric relation positions differ due to wear or dental issues.
Define long centric occlusion concept.
It provides freedom in centric occlusion by creating a flat area between centric relation and centric occlusion.
How is freedom in centric achieved in long centric occlusion?
By altering the fossae of the teeth anteroposteriorly and mediolaterally.
What is balanced occlusion?
Simultaneous and smooth gliding contacts of upper and lower teeth from centric to eccentric positions.
Name a factor influencing eccentric occlusal balance that is not under the dentist’s control.
Condylar guidance.
What is incisal guidance?
The relationship and angle of the anterior teeth during mandibular movements.
What role do compensating curves play in occlusal balance?
They enhance stability by aligning with natural mandibular trajectories.
Define bilateral occlusal balance concept.
Stable simultaneous contact of teeth in centric relation with smooth transitions to eccentric positions.
What minimal vertical overlap is used in bilateral occlusal balance?
0.5 to 1 mm.
What are the advantages of bilateral occlusal balance?
Improves masticatory efficiency and enhances denture stability.
Name one disadvantage of bilateral occlusal balance.
It is labor-intensive and requires frequent maintenance.
What is the lingualized occlusion concept?
It directs occlusal forces lingually to enhance lower denture stability.
What teeth are used in the lingualized occlusion concept?
Maxillary anatomical teeth and mandibular non-anatomical teeth.
What is the primary occlusal contact in lingualized occlusion?
Palatal cusps of maxillary teeth occlude with mandibular fossae.
Name one advantage of lingualized occlusion.
Better chewing efficiency than monoplane occlusion.
Name one disadvantage of lingualized occlusion.
Requires grinding to achieve cusp-fossa contacts.
What is the monoplane occlusion concept?
It uses cuspless teeth with flat occlusal surfaces set on a single plane.
What is the recommended overbite and overjet in monoplane occlusion?
Minimal overbite and overjet.
Why is monoplane occlusion suited for patients with ridge resorption?
Its flat plane adapts to anatomical changes over time.
Name one advantage of monoplane occlusion.
Simplifies jaw records and tooth arrangement.
Name one disadvantage of monoplane occlusion.
Reduced masticatory efficiency.
What is the purpose of balancing ramps in non-anatomical teeth arrangement?
To maintain occlusal balance during excursions.
How do compensating curves assist non-anatomical teeth arrangements?
They align teeth for stability and functional harmony.
What is the curve of Spee?
An anteroposterior curve in the occlusal plane to enhance functional efficiency.
What is the curve of Wilson?
A mediolateral curve to improve occlusal stability.
Name an advantage of using compensating curves with non-anatomical teeth.
Prevents destabilizing forces during mandibular movements.
What is the key disadvantage of using ramps or curves in setup?
Requires precise laboratory setup.
Name the three most common concepts of eccentric occlusion.
Bilateral occlusal balance, monoplane occlusion, and lingualized occlusion.
Why is bilateral occlusal balance challenging to maintain?
Frequent base adjustments are needed as dentures settle.
How do compensating curves affect anterior tooth aesthetics?
They allow a more natural overlap of anterior teeth.
What is the main focus of lingualized occlusion?
Stability of the lower denture through lingual force distribution.
What is the role of anterior teeth in bilateral occlusal balance?
To ensure smooth transitions with minimal overlap and overjet.
How does monoplane occlusion handle lateral stresses?
It eliminates them, reducing mucosal irritation.
Why are flat teeth used in monoplane occlusion?
To adapt to variable occlusal relationships caused by ridge resorption.
What is the main determinant of success in occlusal concepts?
Matching the patient’s anatomical and functional needs with the appropriate occlusal scheme.
