LBBO and Monoplane Occlsuion Schemes Flashcards
The bilateral, simultaneous, anterior and posterior occlusal contact of teeth in centric and eccentric positions
balanced occlusion
Is a balanced occlsuion seen in natural dentition?
No. Only preffered in dentures because it prevents tipping during parafunctional movments
What are 2 ways balanced occlusions acheieved?
- Anatomic posterior teeth
- Non antomic posterior teeth + balancing ramp
what are 4 requirments of balanced occlsuion?
- All teeth of working side in contact should glide evenlyagainst oposing
- No single tooth contacts
- Contacts on balancing side, but should not interfere with gliding of wokring side.
- Simultaneous contact on working side.
If for cosmetic purposed, there is anterior overlap of teeth what is required to prevent tipping of denture in portrusive movment?
Balancing ramp required
Balanced occlusion is important to maintain the stability of the denture. Hence, balanced occlusion is more critical during ______.
parafunctional movements
ex. mastication, bolus in= less balance
Often seen in crown, bridges, fix partial dentures.
occlusal surfaces of teeth on one side occlude simultaneously with a smooth, uninterrupted glide
Unilateral balanced Occlsuion
not for dentures
type of occlusion that is seen when simultaneous contact occurs on both sides in centric and eccentric positions.
- distributes occlusal force evely
- imporve stability
- At least 3 points of contact, more better
Bilateral Balanced occlsuion
dentures
Present in portrustion, the occlusal contacts are smooth and simultaneous anteriorly and posteriorly.
* At least 3 contacts
* Only in dentures
Portruisive balanced occlusion
Where are the 3 contacts on portrusive balanced occlsuion?
- 2 posterior
- 1 anterior
a minimal simultaneous three point contact (one anterior, two posterior) present during lateral moment of the mandible.
Lateral balanced Occlusion
only dentures
What are 3 disadvantages of balanced occlsuion?
- Difficult to acieve with anterior overlap
- Can encourage lateral and portrusive grinding
- Adjustable articulator required
Main characteristic of LBBO
In the posterior, Maxillary molar lingual cusp articulate with the central fossa of the mandibular molars.
What degree of teeth in LBBO?
- 33 degree fully anatomic max posteriors
- 0 degree monoplane non anatomic mandibular posteriro
Wegding effect prevent displacment
What does LBBO allow for?
Allow for cosmetic anatomic maxillary posterior teeth
What occlusion req?
patient places high priority on esthetics but oralconditions indicate a non-anatomic occlusal scheme
* Severe alveolar resorbtion
* Class 2 jaw
* Displacable supporting tissue
LBBO
What occlusion req?
When a complete denture opposes a removable partial denture.
LBBO
What occlusion req?
When a more favorable stress distribution is desired in patients with parafunctional habits.
(bruxing, clenching)
LBBO
5 Main adavantages of LBBO?
- Anatomic & non anatomic
- Cusp form more natural
- Good penetration of bolus
- Verticel forces centralized on mandibular teeth
- Less displacment
Main DISadavantages of LBBO?
Max lingual cusps can wear, negating centralized forces of post teeth and increasing likleyhood of displacment
=replace more often
In LBBO, which curve functions to help seeting the mandibular teeth?
Curve of Spee
In LBBO, which curve functions to help seeting the maxillary teeth?
Curve of Wilson
Both the nonworking and working side contacts are limited
Limited to the maxillary lingual cusp
Less lateral dusplacement and less lateral forces with what kind of occlsuion?
Lingualized Bilateral balanced occlsuion
how big of a seperation between buccal cusp of posterior teeth in LBBO?
1-2 mm seperation
What occlsuion scheme?
LBBO
What occlsual scheme?
Centralized Bilateral balanced occlsuion
CBBO+ Anatomical teeth
What occlsuion scheme?
Lingualized Bilateral balanced occulsion
LBBO + Anatomic teeth
What occlsuion scheme?
LBBO + anatomic max & monoplane mand
What occlusal scheme?
Monoplane occlusion, flat teeth
What does a balancing ramp do?
Prevents tiping of mandibular denture in portrusion, minimize veritcle overlap.
What occlsuion?
Complete balance in al excursions
Non-anatomic monoplane occlusion
What occlsion req?
Abnormal closure inbalance, pathosis, trauma, neuromuscular disturbances, TMJ, etc
Non-anatomic (Monoplane) Occlusion
What occlsuin scehem?
- Posterior displaced muscosa
- bad ridges, flat, uneven
- milling chew pattern
Non-anatomic (Monoplane) Occlusion
What occlusal scheme?
Max verticel forces and minimum horizontal stress desired
Non-anatomic (Monoplane) Occlusion
