Covetrus CH - Veterinary Instrumentation

15 Dental Equipment & Instrumentation 3 Internal Fixation

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Screw Identification Tree

Use this decision tree tool to help you identify different type of screw. Start on the left and work your way across. The code prefixes relate to the type of screw e.g. CSST = cortical screw self tapping, LS = locking screw, CAN = cancellous and so on.

Drive Shape

Head

Features

Code

Type

LOCKING SCREW

THREADED HEAD

LS__STAR

STAR

TITANIUM STAR DRIVE SCREW

COLOURED

TTAR__STAR

NON THREADED HEAD

STAR DRIVE CORTICAL SELF TAPPING SCREW

STAINLESS STEEL

SDCS

THREADED HEAD

LOCKING SCREW

LS

CORTICAL SELF TAPPING SCREW

FLUTED TIP

CSST

FINE THREAD

CORTICAL SCREW

CS

BLUNT TIP

DRIVE SHAPE

HEXAGONAL

CANCELLOUS SCREW (FULL THREAD)

FULLY THREADED SHAFT

CAN/CNF

COARSE THREAD

CANCELLOUS SCREW (PART THREAD)

PART THREADED SHAFT

CNP

TITANIUM SCREW

COLOURED

TICS/TTARSC

CORTICAL SELF TAPPING SCREW CRUCIATE HEAD

STAINLESS STEEL

CSST10

CRUCIFORM

TITANIUM SCREW

COLOURED

TICS

Screw Identification - Type & Size Chart Once you have used the decision tree to help you identify type, next measure the screw (length and width). Use this chart to help confirm your identification - where there is a dot in the chart, the corresponding size/type exists.

1.0mm 1.5mm 2.0mm 2.2mm 2.4mm 2.7mm 3.0mm 3.5mm 4.0mm 4.5mm 5.5mm 6.5mm

CS CSST SDCS LS LS-STAR TICS TTARSC TTAR-STAR CAN

CNF CNP

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