Class II Amalgam Preparation

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PREPARATION OF AN IDEAL CLASS II CAVITY
CARIOUS LESIONS ON PROXIMAL SURFACES.

STEPS IN CAVITY PREPARATION
FOLLOW THE PROCEDURE
FOR PREPARING CLASS I.
MARK THE OUTLINE WITH
A LEAD PENCIL AND OPEN
IT WI...

ORIENTATION OF THE BUR IS THE KEY IN PREPARATION.LONG AXIS
OF THE BUR MUST BE PARALLEL TO THE CROWN OF THE TOOTH.

WITH A SWEEPING DRAG, MAINTAINING THE SAME DEPTH
AND BUR ORIENTATION, CUT THE TOOTH TOWARDS MESIAL
PIT. THIS WILL PRODUCE ...

EXTEND THE PREPARATION DISTO
FACIALLY AND DISTO LINGUALLY TO
INCLUDE FISSURES THAT RADIATE FROM
THE PIT, WITH A SLIGHT OCC...

VARIOUS STEPS IN OCCLUSAL PREPARATION.
(NOTE THE ANGULATION OF THE BUR)

VARIOUS STEPS IN OCCLUSAL PREPARATION.
(CONTINUED)

VARIOUS STEPS IN OCCLUSAL PREPARATION.
(CONTINUED)
EXTEND THE PREPARATION PROXIMALLY BUT
MUST STOP 0.8MM SHORT OF MARGINAL...

WITH A LEAD PENCIL, MARK THE EXTENSION OF
THE FACIAL AND LINGUAL WALLS OF THE
PROXIMAL BOX RELATIVE TO THE CONTACT AREA.
P...

CREATE A REVERSE CURVE IN
AN OCCLUSAL OUTLINE. THIS
WILL RESULT WHEN
DEVELOPING THE MESIO FACIAL
WALL PERPENDICULAR TO THE...

PREPARING A PROXIMAL BOX (CONTINUED)
MAKE A DITCH,VERY CLOSE TO
CONTACT, ENTERING HALF OF
THE 245 BUR (245 BUR IS 3 MM
LON...

MOVE THE BUR FACIALLY AND LINGUALLY
ALONG THE DEJ. EXTEND THE DITCH
GINGIVALLY AND TILT THE BUR LIGHTLY
TOWARDS MESIAL.DUR...

FINISHING OF THE CAVITY WALLS:
REMOVE ANY IRREGULARITIES FROM THE MARGIN AND REMOVE
UNSUPPORTED ENAMEL BY USING CHIESELS, ...

USING GMT, CREATE THE BEVELS IN
GINGIVAL AND AXIOPULPAL WALL.
MAKE BEVEL ON OCCLUSAL WALL.

WALLS AND FLOORS OF CAVITY PREPARATION
LINE ANGLES OF THE CAVITY PREPARATION
BUCCAL
(FACIAL)
WALL
AXIAL WALL
LINGUAL WALL
...

VARIOUS WALLS CREATED DURING CLASS II PREPARATION
RIGHT ANGLE
NO BEVEL
ROUNDED
ENAMEL WALL
PARALLELS
DIRECTION OF
RODS ONL...

MEASUREMENTS OF THE PREPARED CAVITY

EXAMPLES OF CLASS II CAVITY PREPARATION

EXAMPLES OF CLASS II CAVITY PREPARATION

REASONS FOR FAILURE IN CAVITY PREPARATION
EXTERNAL OUTLINE FORM INTERNAL FORM FINISH

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