Downs Analysis: SL Parameters Down's Mean Observed Values Inferences
Downs Analysis: SL Parameters Down's Mean Observed Values Inferences
SL
Parameters
Down's
Observed
Mean
Values
87.80
More/less
Inferences
Prognathic chin or
retrognathic chin or
mandible
00
Angle of Convexity (Pog-A x A-N)
Positive means Pog-A line is located
anterior to Na-Pog.Negative angle: Pog-A
line is located posterior to NaPog.Negative angle is associated with
prognathic lower face.
DOWNS ANALYSIS
SL
Parameters
Down's Mean
AB plane to N-Pog(A-B
-4.80
Observed Values
More/less
Inferences
large -ve value means
class II malocclusion
positioned behind A
relationship in relation
to the facial plane.
Mandibular Plane(Go-
21.900
More/less
Me x -Or)
Vertical/horizontal
growth pattern
59.40
More/less
Vertical/horizontal
growth pattern
DOWNS ANALYSIS
S
Parameters
L
6
Down's
Observed
Mean
Values
9.500
More/less
Inferences
Vertical/horizontal growth
pattern
steep/Flat cant of occlusion
135.40
More/less
ALI)
14.50
More/less
91.400
More/less
Proclined/retroclined lower
angle(TLI AU x OpA-OpP)
9
10
incisors
2.7mm
More/less
Proclined/retroclined lower
incisors
STEINERS ANALYSIS
SN
Parameters
Steiners Mean
Observed Values
Inferences
SNA
820
More/less
Prognathic
maxilla/retrognathic
maxilla
SNB
800
More/less
Prognathic
maxilla/retrognathic
mandible
ANB
20
More/less/equal
Skeletal Class II
/III/I relationship of
U/L jaws
SN-Go Gn
320
More/less
Upper incisor to SN
1040
More/less
Vertical/horizontal
growth pattern
Proclined/retrocline
d
Upper incisors
STEINERS ANALYSIS
SN
Parameters
Steiners Mean
Observed Values
Inferences
Upper incisor to NA
220
More/less
Proclined/retroclined
Lower incisor to NB
250
More/less
Proclined/retroclined
Occlusal plane to SN
140
More/less
Vertical/horizontal growth
pattern
Steep/Flat cant of occlusion
Upper incisor to NA
4mm
More/less
Proclined/retroclined
10
Lower incisor to NB
4mm
More/less
Proclined/retroclined
Tweed Analysis
SN
Parameters
Mean
Observed
Values
Inferences
FMA
250
More/Less
Vertical/horizon
tal growth
pattern
900
More/less
Proclined/retroc
lined
650
Less/more
Proclined/retroc
lined
Poor esthetics
Go-Me x -Or
2
IMPA
TLI ALI x Go-Me
FMIA
TLI ALI x Or
WITS APPRAISAL
SN
1
Parameters
AO BO
(A to B x OpP
OpA)
Wits' Mean
Observed Values
Inferences
-1.00 mm
+ or -
Skeletal Class II
or ClassIII
relationship
JARABAK RATIO
SN
Parameters
Observerd
value
Inference
TAFH(Me N )
TPFH(S-Go)
More/Less
horizontal growth
/Vertical pattern
Normal
Values
Observed Values
Inferences
-2mm
Ahead/behind/on the
line
Protrusive+/retrusive-/normal position
if on the line
-1mm
Ahead/behind/on the
line
Protrusive+/retrusive-/normal position
if on the line
Ahead/behind/on the
line
Protrusive+/retrusive-/normal position
if on the line
Ahead/behind/on the
line
Protrusive+/retrusive-/normal position
if on the line
8-15
More/less
77
More/less
Steiners Analysis
Others:
H Angle (n-Pg-ls)
Merrifield Z angle ( pg-ls/li-FH])