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no PRELIMINARY TECHNICAL PROCEDURES
THE MATRIX
The use of the matrix is essential to the proper contour of
proximo-incisal or proximo-occlusal fiUings of a plastic nature.
There are many forms of matrix bands and retainers suppHed
by the manufacturer, but in special cases, the dentist may
often adopt matrices of his o^vn construction with better;
results.
Four important uses of the matrix SLve: first j to act as al
temporary wall of resistance during introduction of the filling;
second, to give shape to the restoration; third, to maintain the'
form of the filling during hardening or setting fourth, to hold
;
back the gum and rubber dam during introduction of the
filling.
Numerous forms of patented matrix holders and bands
may be obtained from the manufacturers, among which arf^
the Ivory, Crenshaw, Hinniker, Jack, Brophy, Woodward,
Lodge, Onderdonk and Hodson. Matrix bands are usually
constructed of steel, phosphor bronze, copper, german silver
or celluloid. In many instances the dentist may accomplish
better results by constructing matrices for each individual
case. Among numerous forms utilized for special cases may
be mentioned the following : i. The Soldered Band.—Made
by taking a measurement of the neck of the tooth and solder-
ing a band of metal to fit.
2. The Tied Band.—Clamp with pliers a piece of metal
around the tooth, pinching the ends tightly together. Re-
move and tie at the point of juncture with binding wire,
after which bend back the projecting ends and place in position
on the tooth.
3. Another Tied Band.^-Tske a measurement of the neck
of the tooth and cut a piece of metal of the proper length and
width. Punch a hole near each end. Pass a ligature through
THE MATRIX
The use of the matrix is essential to the proper contour of
proximo-incisal or proximo-occlusal fiUings of a plastic nature.
There are many forms of matrix bands and retainers suppHed
by the manufacturer, but in special cases, the dentist may
often adopt matrices of his o^vn construction with better;
results.
Four important uses of the matrix SLve: first j to act as al
temporary wall of resistance during introduction of the filling;
second, to give shape to the restoration; third, to maintain the'
form of the filling during hardening or setting fourth, to hold
;
back the gum and rubber dam during introduction of the
filling.
Numerous forms of patented matrix holders and bands
may be obtained from the manufacturers, among which arf^
the Ivory, Crenshaw, Hinniker, Jack, Brophy, Woodward,
Lodge, Onderdonk and Hodson. Matrix bands are usually
constructed of steel, phosphor bronze, copper, german silver
or celluloid. In many instances the dentist may accomplish
better results by constructing matrices for each individual
case. Among numerous forms utilized for special cases may
be mentioned the following : i. The Soldered Band.—Made
by taking a measurement of the neck of the tooth and solder-
ing a band of metal to fit.
2. The Tied Band.—Clamp with pliers a piece of metal
around the tooth, pinching the ends tightly together. Re-
move and tie at the point of juncture with binding wire,
after which bend back the projecting ends and place in position
on the tooth.
3. Another Tied Band.^-Tske a measurement of the neck
of the tooth and cut a piece of metal of the proper length and
width. Punch a hole near each end. Pass a ligature through
