holdway's analysis

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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