Covetrus CH - Veterinary Instrumentation

15 Dental Equipment & Instrumentation 3 Internal Fixation

www.vetinst.com www.veterinary-instrumentation.co.uk

Equipment & Screw Boxes AO Screw/Equipment Boxes

Cortical Nuts

Occasionally tapped threads strip and a larger screw is appropriate. Lag screws are particularly vulnerable as only one cortex is available. A cortical nut manufactured from implant grade nylon gives the screw purchase allowing normal tightening.The thread form is designed to grip the screw to minimise ‘backing out’. Available in 2.0mm, 2.4mm, 2.7mm, 3.5mm and 4.5mm cortical thread forms. Supplied as a single sterile pack.The cortical nuts are also available in stainless steel.

N20 N24 N27 N35 N45

2.0mm Cortical Nut Stainless Steel (Non Sterile) 2.4mm Cortical Nut Stainless Steel (Non Sterile) 2.7mm Cortical Nut Stainless Steel (Non Sterile) 3.5mm Cortical Nut Stainless Steel (Non Sterile) 4.5mm Cortical Nut Stainless Steel (Non Sterile)

BX2735CS

CN20-A CN24-A CN27-A CN35-A CN45-A

2.0mm Cortical Nut Nylon (Sterile) 2.4mm Cortical Nut Nylon (Sterile) 2.7mm Cortical Nut Nylon (Sterile) 3.5mm Cortical Nut Nylon (Sterile) 4.5mm Cortical Nut Nylon (Sterile)

BX20CS

Please note design may vary with size of implant

Associated Spanner Size

Box For 2.0 mm AO Screws & Equipment Box For 2.4 mm AO Screws & Equipment Box For 2.7 mm /3.5 mm AO Screws & Equipment

BX20CS BX24CS

Cortical Nut Nut Profile

N20 N24 N27 N35 N45

Square Square

3.5mm 4.5mm

BX2735CS

Hex Hex Hex

1/4"

Screw Boxes For AOType Screws &/Or Locking Screws

7mm

11/42"

Screw ExtractionTrephine

Please note design may vary with size of implant

Once the head of a screw has become detached the shaft can be very difficult to extract, particularly when the screw has been in situ for some time.The screw extraction trephine is designed to ‘core out’ the screw shaft either in its entirety or partially to allow the screw to be grasped by extraction forceps.The internal diameter is a little larger than the screw to be extracted.The external diameter is small enough in most cases to allow the replacement of the screw by a larger one.The trephine fits directly into a Jacobs Chuck.

SH1500 Screw Box 1.5mm AO Type Screws &/Or Locking Screws (All Lengths) SH2000 Screw Box 2.0mm AO Type Screws &/Or Locking Screws (All Lengths) SH2400 Screw Box 2.4mm AO Type Screws &/Or Locking Screws (All Lengths) SH2700 Screw Box 2.7mm AO Type Screws &/Or Locking Screws (All Lengths) SH2735 Screw Box 2.7mm & 3.5mm AO Type Screws &/Or Locking Screws (All Lengths of 2.7mm & All Lengths Of 3.5mm Up To 50mm) SH3500 Screw Box 3.5mm AO Type Screws &/Or Locking Screws (Up To 50mm) SH4500 Screw Box For 4.5mm AO Type Screws (Even Number Lengths From 12-50mm)

SCET20 SCET24 SCET27 SCET35 SCET45

Extraction Trephine For 2.0mm Screws o/d 2.7mm Extraction Trephine For 2.4mm Screws o/d 3.5mm Extraction Trephine For 2.7mm Screws o/d 3.5mm Extraction Trephine For 3.5mm Screws o/d 4.5mm Extraction Trephine For 4.5mm Screws o/d 5.5mm

136