holdway's analysis
TRANSCRIPT
HOLDAWAY’S ANALYSIS
Ajeesha Nair
INTRODUCTION
Reed .A.HoldawayIn 1983
Variables and Norms
FACIAL ANGLE NOSE PROMINENCE SUPERIOR SULCUS DEPTH SOFT TISSUE SUBNASALE TO H LINE SKELETAL PROFILE CONVEXITY BASIC UPPER LIP THICKNES UPPER LIP STRAIN MEASUREMENT H ANGLE LOWER LIP TO H LINE INFERIOR SULCUS TO H LINE SOFT TISSUE CHIN THICKNESS
Lines used :
H line or harmony line Soft tissue facial line Hard tissue facial plane Sella-nasion line Frankfort horizontal plane Line drawn at right angle to FH plane
down tangent to the vermilion border of upper lip
LINES USED
SOFT TISSUE FACIAL ANGLE
Between FH plane and soft tissue facial plane.
Normal 91 +/- 7. Prognathic or retrognathic
NOSE PROMINENCE
Nose tip to the line perpendicular to FH and running tangent to upper lip.
14-24 mm
SUPERIOR SULCUS DEPTH
Perpendicular to FH and tangent to vermilion border of upper lip.
3mm 1-4mm acceptable
soft tissue subnasale to H line
Ideal is 5mm 3-7mm is normal Short thin lips-3mm Long thicker lips-7mm
Skeletal profile convexity
From point A to hard tissue facial plane (Na-Pog).
Varies with H angle
Basic upper lip thickness Upper lip thickness is measured horizontally
from a point 3 mm below point A to outer border of upper lip.
Avg value - 15 mm Amount of lip strain
or incompetency
Upper lip strain measurement
Vermilion border of upper lip to the most anterior portion of central incisor
13-14 mm
H angle
Between soft tissue facial plane and harmony line.
Ideal 10 degree 7-15 degrees. Measures upper lip
prominence or retrognathism of the Soft tissue chin
H angle and skeletal convexity
Lower lip to H line H line to most prominent point on lower
lip 0- 0.5 mm ideal -1 to + 2mm acceptable. <-1mm lingually positioned lower
anteriors >2mm denture is protrusive
Inferior sulcus to H line
is measured from the deepest point in the curvature between the Lower lip and the chin and the H-line
AVG VALUE- 5 mm
Soft tissue chin thickness
Soft tissue thickness is measured from hard tissue Pogonion to soft tissue Pogonion.
AVG VALUE- 10 TO 12 mm
ACCORDING TO HOLDAWAYA PERFECT PROFILE SHOULD HAVE
ANB - 2 degreesH-LINE ANGLE -7 to 8 degrees
LOWER LIP should touch theH line
H-LINE should bisect S curve between Pronasale and Subnasale
TIP OF THE NOSE - Should be 9mm anterior to H-line
There should be no lip tension on closure
Analysis
Normal Patient value
Inference
St facial angle 91+/-7 83 Slightly Retrusive lower jaw
Nose prominence
14-24 mm
17 normal
Superior sulcus depth
1-4 mm2
Normal
Soft tissue subnasale to h ine
5+-2 mm
7 Normal
Skeletal profile convexity
0 mm 3 Convex profile
Upperlip thickness
15mm 20mm Increased
Normal Patient value
Inference
Upper lip strain 13-14 mm
14 No lip strain
H angle 7-14 22 Protrusive upperlip or retrusive chin
Lower lip to H line
-1- 2 mm
2.5 slightly protrusive
Inferior sulcus to H line
5 mm 5 Normal
Soft tissue chin thickness
10-12 mm
13 Slightly increased
conclusion
A soft tisue chin nicely positioned in the facial profile
No serioius skeletal convexity H angle with in the convexity A definite lip curl of 4-6 mm Lower lip n h line or within 1 mm of it Lower lip form and sulcus depth
harmonious with upper lip
REFERENCES
A soft tissue cephalometric analysis and its use in orthodontic treatment planning.Part 1
:Reed A Hold away Orthodontic cephalometry; Athanasios E
Athanasiou
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