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1. ANALYSIS OF THE LIPS
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2. LENGTH OF UPPER LIP
MEAN VALUES
BURSTONE
BOYS - 24 mm
GIRLS - 20 mm
RAKOSI
BOYS - 22.5 mm
GIRLS - 20 mm
CLASS – II 22 mm
CLASS – III 20.9 mm
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3. LENGTH OF LOWER LIP
MEAN VALUES
BURSTONE - BOYS- 50 .0 mm
GIRLS- 46.5 mm
RAKOSI - BOYS- 45.5 mm
GIRLS- 40.0 mm
CLASS II - RETRACTION OF UPPER
INCISORS - LOWER LIP
CURLS UP AND MOVES
FORWARD
CLASS III - LINGUAL TIP OF LOWER
INCISORS - LIP MOVES
BACKWARD
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4. THICKNESS OF RED PART OF UPPER LIP
AVERAGE SIZE
11.5 mm ( RAKOSI)
CLASS II : UPPER LIP THIN DUE
TO ANGULATION OF
LOWER INCISORS
AVG : 12.4 mm ( 63o
)
CLASS III : UPPER LIP THICKER AS
IT RESTS ON LOWER
LIP
DURING COURSE OF Rx:
CLASS II : LIP GROWS
THICKER
CLASS III : LIP GROWS
THINNERwww.indiandentalacademy.com

5. THICKNESS OF RED PART OF LOWER LIP
AVERAGE SIZE
12.5 mm ( RAKOSI )
CLASS II : LOWER LIP
IS THICKER ( 14 mm )
CLASS III : UPPER LIP IS
THINNER ( 11.9 mm )
DEPENDING ON THE
POSITION OF MANDIBLE
DURING COURSE OF Rx:
CLASS II : LOWER LIP
BECOMES THINNER
CLASS III : UPPER LIP
BECOMES THICKER
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6. STEINERS LIP ANALYSIS
REFERENCE POINT IS THE
CENTRE OF THE S SHAPED
CURVE BETWEEN THE TIP
OF NOSE AND SUB NASALE
REFERENCE LINE
EXTENDS FROM THIS POINT
TO THE SOFT TISSUE
POGONION
LIP BEHIND THIS POINT
ARE SAID TO BE FLAT
LIP AHEAD OF THIS LINE
ARE SAID TO BE TOO
PROMINENT
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7. RICKETTS LIP ANALYSIS
REFERENCE LINE CONNECTS
NOSE TIP TO SOFT TISSUE
POGONION
LIPS ARE ANALYSED
DEPENDING ON WHETHER
LIP IS AHEAD OR BEHIND
THIS LINE
NORMAL VALUES
UPPER : 2-3 mm
LOWER : 1-2 mm
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