Frankel's Regulators Flashcards
Explain Frankel’s philosophy
Prevention before exacerbation
He wanted to correct the myodynamic relationship and in doing so, influence the myotonic action. His devices focus on control of continuous forces and via passive components and instigate correct occlusal relationship with active components
Other names for these appliances
Oral gymnastics device
Vestibular appliance
Explain abnormal muscle function theory
Soft tissue muscle anomalies lead to developmental issues in bone growth
How do we prevent this?
Abnormal muscle function correction
Leads to normal musculature development and function
Leading to normal skeletal structures
How do Frankel’s Appliances work?
1) Removal of Muscle Forces
Continuous force from Buccal and Labial muscles must be removed with: Buccal shields and Labial pads
2) They serve as a template for proper bone growth
Name the 3 type of forces
Continuous
Continuous interrupted
Intermittent
Frankel’s 5 principles:
1) Act on vestibular arena (acrylic base plates)
2) Sagittal corrections (man arch anchorage)
3) Eruption guidance (maxillary anchorage whilst mandible gets freedom to erupt)
4) Minimal maxillary basal effect (less pul on max, more push on man)
5) Periosteal pull (B-S + L-Ps) (Aids PDT growth) (Apical bone growth via hyalinzation)
Mechanisms of action (4)?
- Increase Transversal and Sagittal Inter-Oral space
- Increase Vertical space
- Mandibular Protraction
- Myofunctional adaptation
In which dentition is it used?
Primary Transition MD
Drawbacks?
Limits facial expressions
Irritable
Subject to ptx compliance
What are the 5 FRs?
FR1: Even 1 can be a crowd Class 1 a) mild-mod crowding b) overjet <5mm c) overjet >7mm
FR2
Class 2 D1 and D2
FR3
Class 3
FR4
Shut your mouth please
Open bite and bimaxillary retrusion
FR5 Why the long face? Mod for headgear High mandibular plane Excess vertical height on maxilla
FR1 components:
FR1a)
ACRYLIC
Buccal Shields
Lip Pads
WIRE Labial bow (Max) Labial support wire Palatal bow Canine loops Upper lingual support wire (protrusion bow)
FR1b)
ACRYLIC
Same
WIRE Palatal bow Labial bow (Max) (Remember, for this one, we want to reduce the overjet) Lower lingual support wire Lower lingual springs Lower labial wire (These 3 collectively are known as the tooth moving wire) Canine loops
FR2 components
ACRYLIC
Buccal-Shields
Labial-Pads
L-L-Ps (lower lingual pads)
WIRE Palatal bow Labial bow Canine extensions Upper lingual support wire Lingual cross over wire Support wire for lip pads Lower lingual springs
FR3 components
ACRYLIC
Lip pads (lab pads but in maxilla this time)
Buccal shields
WIRE
Labial bow - this time running along mid 3rd of mandibular incisors
Palatal bow
Occlusal rests
We want the upper lip force to redirect and go towards the mandible - assuming it will push it back
FR4 components
Same as FR 1 and 2 Difference: No upper lingual wire (protrusion bow) No canine loops 4 Occlusal rests
