Transcript Muscle factors affecting occlusal

The Etiology of malocclusion
Local factors
General factors
Skeletal factor
Muscle factor
Dental factor
Muscle factors affecting
occlusal development
Dr. Ahmed AL-Mayali
B.D.S M.Sc. Ortho.
[email protected]
Muscle factors affecting occlusal
development
The lips
Vertical plane
Sagittal plane
Vertical plane
Competent lip
Incompetent lip
Incompetent lip
Skeletal
Soft tissue
importance
Sagittal plane
Cl II
Cl III
Sagittal plane
+
Mild Cl II
sever Cl II
The lip-line
Normal
Low lip line
Not applicable
High lip line
The tongue
Tongue size
Tongue size = lower jaw
Open bite
Tongue posture
Lips apart
Nasal breathing
Tongue function
Normal swallowing
requirement
closure of the lips
Teeth in light occlusal contact
Tongue elevated to the palate
Momentary clenching of the
teeth as food pass
Adaptive swallowing
1-Tooth apart adaptive swallowing
Adaptive swallowing
2-Tooth together adaptive swallowing
3-Swallowing with endogenous
tongue thrust
Thank you