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Headless Compression Screws 4.5 & 6.5

Headless Compression Screws 4.5 & 6.5
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compression screw.

Surgical Technique Surgical Technique for HCS 4.5 and 6.5* 5 Product Information Implants - HCS 4.5 16 Image intensifier control This description alone does not provide sufficient background for direct use of the instrument set. Instruction by a surgeon experienced in handling these nstruments is highly recommended Reprocessing, Care and Maintenance of Synthes Instruments For general guidelines, function control and dismantling of multipart instruments, please refer to: www.synthes.com/reprocessing

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Headless Compression Screws 4.5 & 6.5 - 4

compression screw. Shorter surgery due to simplified surgi- Reverse-cutting flutes Facilitate screw removal and prevent potential breaking of implant For minimally invasive technique and guided insertion Cutting flutes Facilitate countersinking of the screw All headless compression screws from Synthes are available in stainless implant-grade steel Identical pitch of head and shaft threads Two different thread lengths The optimal implant for every case due to threads available in different lengths

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Headless Compression Screws 4.5 & 6.5 - 5

Functional principle: Lag screw technique with compression sleeve Screw insertion nsert the screw into the bone with Once the tip of the compression sleeve lies on the bone, the fracture gap is closed and compressed by turning the Once the desired degree of compres- sion is reached, the screw is countersunk into the bone with the screwdriver while the compression sleeve is held stationary. During countersinking, no additional compression is generated.

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Headless Compression Screws 4.5 & 6.5 - 6

Indications HCS 4.5 Fracture, osteoarthritis, or deformity of small to large bones. Examples: − Calcaneus − Talus − Metatarsus − Distal and proximal tibia − Distal femur − Proximal humerus HCS 6.5 Fracture, osteoarthritis, or deformity of small to large bones. Examples: − Calcaneus − Talus − Distal and proximal tibia − Distal femur 4 Synthes HCS 4.5/6.5 Instructions for Use

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Headless Compression Screws 4.5 & 6.5 - 7

Insert the guide wire Guide Wire 0 1.6 mm, length 220 mm Guide Wire 0 1.6 mm with trocar tip, length 220 mm. Stainless Steel Guide Wire 0 2.8 mm, length 300 mm Guide Wire 0 2.8 mm with trocar tip, length 300 mm. Stainless Steel After a stab incision, advance the drill sleeve assembly through the soft tissues until it reaches the bone. While monitoring with the image intensifier, advance the guide wire through the drill sleeve assembly until the thread tip is anchored in the far cortex of the bone. C Warning: Do not forcefully insert the guide wire as it may cause bending.

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Headless Compression Screws 4.5 & 6.5 - 8

Determine screw and thread length 03.226.030 Direct Measuring Device for HCS 4.5 03.227.030 Direct Measuring Device for HCS 6.5 Remove the drill sleeve. Slide the narrow end of the measur- ng device through the protection sleeve and over the guide wire until it reaches the bone. The measurement on the measuring device shows the depth in millimeters of the guide wire in the bone. This depth indi- cates the appropriate screw length. Important: Only use the guide wire in its prescribed length to ensure correct measurement. If the screw is to be counter- sunk below the surface of the bone,...

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Headless Compression Screws 4.5 & 6.5 - 9

The position of the fracture line determines Correct thread length The shaft thread lies below the fracture gap and completely within the distal fragment during compression. Fragments Incorrect thread length The shaft thread lies above the fracture gap or the osteotomy. Fragments cannot be compressed.

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Headless Compression Screws 4.5 & 6.5 - 10

Surgical Technique for HCS 4.5 and 6.5 3 Predrilling Instruments HCS 4.5 03.226.039 Drill Bit л 3.2 mm, cannulated 312.770 Protection Sleeve 9.5/7.0 312.760 Drill Sleeve 7.0/3.2 HCS 6.5 310.630 Drill Bit л 5.0 mm, cannulated 312.090 Protection Sleeve 15.5/13.0 312.050 Protection Sleeve 12.0/8.5 Predrilling facilitates the insertion of the screw in dense bone. Insert the drill sleeve in the protection sleeve. Slide the cannulated drill bit over the guide wire and predrill to the desired depth. Remove the drill sleeve and verify the appropriate drilling depth with the image intensifier. Note:...

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Headless Compression Screws 4.5 & 6.5 - 11

Option: Predrilling for head 03.226.042 Drill Bit for predrilling for screw head, 03.227.042 Drill Bit for predrilling for screw head, The corticalis can be predrilled with the drill bit to facilitate head insertion in dense bone and to prevent the bone from Slide the drill bit with the protection sleeve over the guide wire and carefully predrill the corticalis. Note: The depth of predrilling depends on the inclination of the guide wire to the bone. It is necessary to predrill only to the first marking in cases where angulation is ± 90°. An an- gulation of ± 45° requires a deeper...

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Headless Compression Screws 4.5 & 6.5 - 12

319.970 Screw Forceps, self-holding, length 85 mm 319.970 Screw Forceps, self-holding, length 85 mm To remove a screw from the screw rack, pick it up with the screw forceps and twist the compression sleeve over the Attention: Do not remove the screw with the compression sleeve directly from the screw rack. The screw rack could be Insert screw and compress fragments 03.226.037 Handle for Compression Sleeve for HCS 4.5 03.226.038 Attachment for Compression Sleeve

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Headless Compression Screws 4.5 & 6.5 - 13

03.227.037 Handle for Compression Sleeve for 03.227.038 Attachment for Compression Sleeve Slide the compression sleeve handle into the compression sleeve. Insert the screw assembly over the guide wire. Insert the screw into the bone by turning the compression sleeve until the fracture gap or the osteotomy is closed and com- Option: Screw insertion can also be performed with the use of a power drill. Slide the attachment for compression sleeve into the compression sleeve and connect it to the power drill. Warning: Insert the screw into the bone and stop before the compression sleeve touches...

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Headless Compression Screws 4.5 & 6.5 - 14

Surgical Technique for HCS 4.5 and 6.5 Optional instruments for use with 4.5 mm screws 03.226.034 Sleeve for Compression Sleeve for HCS – Headless Compression Screw л 4.5 mm for use with 6.5 mm screws 03.227.034 Sleeve for Compression Sleeve for HCS – Headless Compression Screw л 6.5 mm In osteoporotic bone, an additional sleeve should be placed over the compression sleeve before compressing the fracture or osteotomy to prevent the compression sleeve from piercing the cortex. Notes – Verify the correct position of the shaft thread in the distal fragment using the image intensifier. If the...

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