608.4520              20 mm

608.4522              22 mm

608.4524              24 mm

608.4526              26 mm

608.4528              28 mm

608.4530              30 mm REF. NO.            LENGTH

608.4535              35 mm

608.4540              40 mm

608.4545              45 mm

608.4550              50 mm

608.4555              55 mm

608.4560              60 mm REF. NO.            LENGTH

608.4565              65 mm

608.4570              70 mm

608.4575              75 mm

608.4580              80 mm

Technical Specification Thread Diameter                             4.5 mm Drill Bit for threaded Hole               2.5 mm Core Diameter                                2.4 mm Hexagonal Socket                           3.5 mm Head Diameter                                8.0 mm Shaft Diameter                                3.4 mm

4.5 mm Cancellous Bone Screw Short-Thread Specification

• 4.5 mm Cancellous Bone Screw Short-Thread available lengths are 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm and 80mm.
• 4.5 mm Cancellous Bone Screw Short-Thread is made from pure Titanium and SS 316L.
• Any additional length sizes of this screw will be made on demand.
• This is Self Tapping Screw. Self Tapping Screws cuts its own thread while being driven into the bone. It makes a small hole while entering the bone which creates a tight friction fit between the threads. This helps fight vibration loosening and allows the parts to be taken apart if needed.
• Instruments are available for this screw such as Bone Taps, Combined Drill & Tap Sleeve, Counter Sink, Depth Gauge, Drill Bits, Drill Guide, Drill Sleeve, Hollow Mill Screw Removal, Reverse Measuring Device, Screw Drivers and Screw Holding Forceps etc.

4.5 mm Cancellous Bone Screw Short-Thread uses

4.5 mm Cancellous Bone Screw Short-Thread is intended for fracture fixation of large bones and large bone fragments.
This Screw is also indicated for:

• Femoral neck fractures
• Slipped capital femoral epiphyses
• As an adjunct to DHS in basilar neck fractures
• Tibial plateau fractures
• Ankle arthrodeses
• Pediatric femoral neck fractures
• Intercondylar femur fractures
• Sacroiliac joint disruptions
• Subtalar arthrodeses

Bone screws are the most commonly used orthopedic implants. There are many different types and sizes of screws for different types of bones. Most bone screws are made out of stainless steel or titanium alloys. The outer diameter, root diameter, and thread pitch and angle are important in determining screw mechanics.

In orthopedics, screws are typically described by their outer diameter, for example, a “4.5 mm Cancellous Bone Screw Short-Thread” has an outside diameter of 4.5 mm. The pitch of a screw is the linear distance travelled by a screw for one full turn of the screw. The screw advances by a distance equal to the distance between the threads with each full turn. Cortical screws have a lower pitch and therefore more number of threads. Cancellous bone screws have a greater depth of the screw to increase the surface area and therefore improve the purchase, as the bone is weaker.

Screws function by converting the tightening torque into internal tension in the screw and elastic reactions in the surrounding bone. This creates compression between the fracture fragments that the screw is holding together. 4.5 mm Cancellous Screw Short-Thread is typically inserted into holes drilled equal to the root diameter and are either self-tapping or are inserted tapped (threaded) holes. The torque to insert cortical bone screws can be high, so the screws must be properly inserted into the correct size drilled hole and designed to withstand insertion torque levels expected in cortical bone. Cancellous bone screws have large, deep threads that grip the spongy bone well. Because of the relatively low strength of the cancellous bone, failure of the screw itself during insertion is rare, but pull out can be an issue.

The post Cancellous Bone Screws Short-Thread 4.5mm first appeared on Archoverseas.

609.30   30 mm

609.35   35 mm

609.40   40 mm

609.45   45 mm

609.50   50 mm

609.55   55 mm REF. NO. LENGTH

609.60   60 mm

609.65   65 mm

609.70   70 mm

609.75   75 mm

609.80   80 mm

609.85   85 mm REF. NO. LENGTH

609.90   90 mm

609.95   95 mm

609.100 100 mm

609.105 105 mm

609.110 110 mm

Technical Specification Thread Diameter                            6.5 mm Drill Bit for threaded Hole             3.2 mm Core Diameter                               3.0 mm Hexagonal Socket                         3.5 mm Head Diameter                             8.0 mm Shaft Diameter                             4.5 mm Drill Bit for Shaft                           4.5 mm

6.5 mm Cancellous Screw 16mm Thread Specification

• 6.5 mm Cancellous Screw 16mm Thread available lengths are 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm and 110mm.
• Screws available thread lengths are 16 mm thread, 32 mm thread and Fully threaded.
• 6.5 mm Cancellous Screw 16mm Thread is made from pure Titanium and SS 316L.
• Low-profile head helps reduce possibility of soft tissue irritation .
• Reverse-cutting flutes assist in screw removal.
• Choice of thread lengths offers best fit of threads into far bone fragment, for greater interfragmentary compression.
• Cancellous thread profile uses deep cutting threads with a large pitch to increase resistance to pullout. The large pitch also accelerates screw insertion and removal.
• Self-drilling, self-tapping screw tip facilitates screw insertion by eliminating the need for predrilling and tapping in most cases.
• Any additional length sizes of this screw will be made on demand.
• This is Self Tapping Screw. Self Tapping Screws cuts its own thread while being driven into the bone. It makes a small hole while entering the bone which creates a tight friction fit between the threads. This helps fight vibration loosening and allows the parts to be taken apart if needed..
• Instruments are available for this screw such as Bone Taps, Combined Drill & Tap Sleeve, Counter Sink, Depth Gauge, Drill Bits, Drill Guide, Drill Sleeve, Hollow Mill Screw Removal, Reverse Measuring Device, Screw Drivers and Screw Holding Forceps etc.

6.5 mm Cancellous Screw 16mm Thread uses

6.5 mm Cancellous Screw 16mm Thread is intended for fracture fixation of large bones and large bone fragments.
This Screw is also indicated for:

• Femoral neck fractures
• Slipped capital femoral epiphyses
• As an adjunct to DHS in basilar neck fractures
• Tibial plateau fractures
• Ankle arthrodeses
• Pediatric femoral neck fractures
• Intercondylar femur fractures
• Sacroiliac joint disruptions
• Subtalar arthrodeses

Bone screws are the most commonly used orthopedic implants. There are many different types and sizes of screws for different types of bones. Most bone screws are made out of stainless steel or titanium alloys. The outer diameter, root diameter, and thread pitch and angle are important in determining screw mechanics.

In orthopedics, screws are typically described by their outer diameter, for example, a “6.5 mm Cancellous Screw 16mm Thread” has an outside diameter of 6.5 mm. The pitch of a screw is the linear distance travelled by a screw for one full turn of the screw. The screw advances by a distance equal to the distance between the threads with each full turn. Cortical screws have a lower pitch and therefore more number of threads. Cancellous bone screws have a greater depth of the screw to increase the surface area and therefore improve the purchase, as the bone is weaker.

Screws function by converting the tightening torque into internal tension in the screw and elastic reactions in the surrounding bone. This creates compression between the fracture fragments that the screw is holding together. 6.5 mm Cancellous Screw 16mm Thread is typically inserted into holes drilled equal to the root diameter and are either self-tapping or are inserted tapped (threaded) holes. The torque to insert cortical bone screws can be high, so the screws must be properly inserted into the correct size drilled hole and designed to withstand insertion torque levels expected in cortical bone. Cancellous bone screws have large, deep threads that grip the spongy bone well. Because of the relatively low strength of the cancellous bone, failure of the screw itself during insertion is rare, but pull out can be an issue.

The post Cancellous Screws 16mm Thread 6.5mm first appeared on Archoverseas.

6.5 mm Cancellous Screw 32mm Thread Specification

• 6.5 mm Cancellous Screw 32mm Thread available lengths are 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm and 110mm.
• Screws available thread lengths are 16 mm thread, 32 mm thread and Fully threaded.
• 6.5 mm Cancellous Screw 32mm Thread is made from pure Titanium and SS 316L.
• Low-profile head helps reduce possibility of soft tissue irritation.
• Reverse-cutting flutes assist in screw removal.
• Choice of thread lengths offers best fit of threads into far bone fragment, for greater interfragmentary compression.
• Cancellous thread profile uses deep cutting threads with a large pitch to increase resistance to pullout. The large pitch also accelerates screw insertion and removal.
• Self-drilling, self-tapping screw tip facilitates screw insertion by eliminating the need for predrilling and tapping in most cases.
• Any additional length sizes of this screw will be made on demand.
• This is Self Tapping Screw. Self Tapping Screws cuts its own thread while being driven into the bone. It makes a small hole while entering the bone which creates a tight friction fit between the threads. This helps fight vibration loosening and allows the parts to be taken apart if needed.
• Instruments are available for this screw such as Bone Taps, Combined Drill & Tap Sleeve, Counter Sink, Depth Gauge, Drill Bits, Drill Guide, Drill Sleeve, Hollow Mill Screw Removal, Reverse Measuring Device, Screw Drivers and Screw Holding Forceps etc.

6.5 mm Cancellous Screw 32mm Thread uses

6.5 mm Cancellous Screw 32mm Thread is intended for fracture fixation of large bones and large bone fragments.
This Screw is also indicated for:

• Femoral neck fractures
• Slipped capital femoral epiphyses
• As an adjunct to DHS in basilar neck fractures
• Tibial plateau fractures
• Ankle arthrodeses
• Pediatric femoral neck fractures
• Intercondylar femur fractures
• Sacroiliac joint disruptions
• Subtalar arthrodeses

Bone screws are the most commonly used orthopedic implants. There are many different types and sizes of screws for different types of bones. Most bone screws are made out of stainless steel or titanium alloys. The outer diameter, root diameter, and thread pitch and angle are important in determining screw mechanics.

In orthopedics, screws are typically described by their outer diameter, for example, a “6.5 mm Cancellous Screw 32mm Thread” has an outside diameter of 6.5 mm. The pitch of a screw is the linear distance travelled by a screw for one full turn of the screw. The screw advances by a distance equal to the distance between the threads with each full turn. Cortical screws have a lower pitch and therefore more number of threads. Cancellous bone screws have a greater depth of the screw to increase the surface area and therefore improve the purchase, as the bone is weaker.

Screws function by converting the tightening torque into internal tension in the screw and elastic reactions in the surrounding bone. This creates compression between the fracture fragments that the screw is holding together. 6.5 mm Cancellous Screw 32mm Thread is typically inserted into holes drilled equal to the root diameter and are either self-tapping or are inserted tapped (threaded) holes. The torque to insert cortical bone screws can be high, so the screws must be properly inserted into the correct size drilled hole and designed to withstand insertion torque levels expected in cortical bone. Cancellous bone screws have large, deep threads that grip the spongy bone well. Because of the relatively low strength of the cancellous bone, failure of the screw itself during insertion is rare, but pull out can be an issue.

The post Cancellous Screws 32mm Thread 6.5mm first appeared on Archoverseas.

611.25   25 mm

611.30   30 mm

611.35   35 mm

611.40   40 mm

611.45   45 mm

611.50   50 mm REF. NO. LENGTH

611.55   55 mm

611.60   60 mm

611.65   65 mm

611.70   70 mm

611.75   75 mm

611.80   80 mm REF. NO. LENGTH

611.85   85 mm

611.90   90 mm

611.95   95 mm

611.100 100 mm

611.105 105 mm

611.110 110 mm

Technical Specification Thread Diameter                            6.5 mm Drill Bit for Threaded Hole              3.2 mm Core Diameter                                3.0 mm Hexagonal Socket                           3.5 mm Head Diameter                               8.0 mm Drill Bit for Shaft                            4.5 mm

6.5 mm Cancellous Screw Full Threaded Specification

• 6.5 mm Cancellous Screw Full Threaded available lengths are 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm and 110mm.
• Screws available thread lengths are 16 mm thread, 32 mm thread and Fully threaded.
• 6.5 mm Cancellous Screw Full Threaded is made from pure Titanium and SS 316L.
• Low-profile head helps reduce possibility of soft tissue irritation .
• Reverse-cutting flutes assist in screw removal.
• Choice of thread lengths offers best fit of threads into far bone fragment, for greater interfragmentary compression.
• Cancellous thread profile uses deep cutting threads with a large pitch to increase resistance to pullout. The large pitch also accelerates screw insertion and removal.
• Self-drilling, self-tapping screw tip facilitates screw insertion by eliminating the need for predrilling and tapping in most cases.
• Any additional length sizes of this screw will be made on demand.
• This is Self Tapping Screw. Self Tapping Screws cuts its own thread while being driven into the bone. It makes a small hole while entering the bone which creates a tight friction fit between the threads. This helps fight vibration loosening and allows the parts to be taken apart if needed.
• Instruments are available for this screw such as Bone Taps, Combined Drill & Tap Sleeve, Counter Sink, Depth Gauge, Drill Bits, Drill Guide, Drill Sleeve, Hollow Mill Screw Removal, Reverse Measuring Device, Screw Drivers and Screw Holding Forceps etc.

6.5 mm Cancellous Screw Full Threaded uses

6.5 mm Cancellous Screw Full Threaded is intended for fracture fixation of large bones and large bone fragments.
This Screw is also indicated for :

• Femoral neck fractures
• Slipped capital femoral epiphyses
• As an adjunct to DHS in basilar neck fractures
• Tibial plateau fractures
• Ankle arthrodeses
• Pediatric femoral neck fractures
• Intercondylar femur fractures
• Sacroiliac joint disruptions
• Subtalar arthrodeses

Bone screws are the most commonly used orthopedic implants. There are many different types and sizes of screws for different types of bones. Most bone screws are made out of stainless steel or titanium alloys. The outer diameter, root diameter, and thread pitch and angle are important in determining screw mechanics.

In orthopedics, screws are typically described by their outer diameter, for example, a “6.5 mm Cancellous Screw Full Threaded” has an outside diameter of 6.5 mm. The pitch of a screw is the linear distance travelled by a screw for one full turn of the screw. The screw advances by a distance equal to the distance between the threads with each full turn. Cortical screws have a lower pitch and therefore more number of threads. Cancellous bone screws have a greater depth of the screw to increase the surface area and therefore improve the purchase, as the bone is weaker.

Screws function by converting the tightening torque into internal tension in the screw and elastic reactions in the surrounding bone. This creates compression between the fracture fragments that the screw is holding together. This Screw is typically inserted into holes drilled equal to the root diameter and are either self-tapping or are inserted tapped (threaded) holes. The torque to insert cortical bone screws can be high, so the screws must be properly inserted into the correct size drilled hole and designed to withstand insertion torque levels expected in cortical bone. Cancellous bone screws have large, deep threads that grip the spongy bone well. Because of the relatively low strength of the cancellous bone, failure of the screw itself during insertion is rare, but pull out can be an issue.

The post Cancellous Screws Full Threaded 6.5mm first appeared on Archoverseas.

The post Washers for Cancellous Screws first appeared on Archoverseas.

907.60                 60 mm

907.65                 65 mm

907.70                 70 mm

907.75                 75 mm

907.80                 80 mm

907.85                 85 mm

907.90                 90 mm

907.95                 95 mm REF. NO.              LENGTH

907.100                 100 mm

907.105                 105 mm

907.110                 110 mm

907.115                 115 mm

907.120                 120 mm

907.125                 125 mm

907.130                 130 mm

907.135                 135 mm

Technical Specification Thread Diameter                             6.5 mm Drill Bit for Threaded Hole               3.2 mm Drill Bit for Shaft                              4.5 mm Shaft Diameter                                4.5 mm Core Diameter                                3.0 mm Hexagonal Socket                           3.5 mm Head Diameter                               8.0 mm

6.5 mm Cancellous Traction Screw 32mm Thread Specification

• 6.5 mm Cancellous Traction Screw available lengths are 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm and 135mm.
• Screws available thread lengths are 16 mm thread, 32 mm thread and Fully threaded.
• 6.5 mm Cancellous Traction Screw is made from pure Titanium and SS 316L.
• Low-profile head helps reduce possibility of soft tissue irritation .
• Reverse-cutting flutes assist in screw removal.
• Choice of thread lengths offers best fit of threads into far bone fragment, for greater interfragmentary compression.
• Cancellous thread profile uses deep cutting threads with a large pitch to increase resistance to pullout. The large pitch also accelerates screw insertion and removal.
• Self-drilling, self-tapping screw tip facilitates screw insertion by eliminating the need for predrilling and tapping in most cases.
• Any additional length sizes of this screw will be made on demand.
• This is Self Tapping Screw. Self Tapping Screws cuts its own thread while being driven into the bone. It makes a small hole while entering the bone which creates a tight friction fit between the threads. This helps fight vibration loosening and allows the parts to be taken apart if needed..
• Instruments are available for this screw such as Bone Taps, Combined Drill & Tap Sleeve, Counter Sink, Depth Gauge, Drill Bits, Drill Guide, Drill Sleeve, Hollow Mill Screw Removal, Reverse Measuring Device, Screw Drivers and Screw Holding Forceps etc.

6.5 mm Cancellous Traction Screw 32mm Thread uses

6.5 mm Cancellous Traction Screw is intended for fracture fixation of large bones and large bone fragments.
This Screw is also indicated for:

• Femoral neck fractures
• Slipped capital femoral epiphyses
• As an adjunct to DHS in basilar neck fractures
• Tibial plateau fractures
• Ankle arthrodeses
• Pediatric femoral neck fractures
• Intercondylar femur fractures
• Sacroiliac joint disruptions
• Subtalar arthrodeses

Bone screws are the most commonly used orthopedic implants. There are many different types and sizes of screws for different types of bones. Most bone screws are made out of stainless steel or titanium alloys. The outer diameter, root diameter, and thread pitch and angle are important in determining screw mechanics.

In orthopedics, screws are typically described by their outer diameter, for example, a “6.5 mm Cancellous Traction Screw” has an outside diameter of 6.5 mm. The pitch of a screw is the linear distance travelled by a screw for one full turn of the screw. The screw advances by a distance equal to the distance between the threads with each full turn. Cortical screws have a lower pitch and therefore more number of threads. Cancellous bone screws have a greater depth of the screw to increase the surface area and therefore improve the purchase, as the bone is weaker.

Screws function by converting the tightening torque into internal tension in the screw and elastic reactions in the surrounding bone. This creates compression between the fracture fragments that the screw is holding together. 6.5 mm Cancellous Traction Screw is typically inserted into holes drilled equal to the root diameter and are either self-tapping or are inserted tapped (threaded) holes. The torque to insert cortical bone screws can be high, so the screws must be properly inserted into the correct size drilled hole and designed to withstand insertion torque levels expected in cortical bone. Cancellous bone screws have large, deep threads that grip the spongy bone well. Because of the relatively low strength of the cancellous bone, failure of the screw itself during insertion is rare, but pull out can be an issue.

The post Cancellous Traction Screws 32mm Thread 6.5mm first appeared on Archoverseas.

644.050                 50 mm

644.055                 55 mm

644.060                 60 mm

644.065                 65 mm

644.070                 70 mm

644.075                 75 mm

644.080                 80 mm

644.085                 85 mm REF. NO.            LENGTH

4644.090              90 mm

644.095                 95 mm

644.100                 100 mm

644.105                 105 mm

644.110                 110 mm

644.115                 115 mm

644.120                 120 mm

Technical Specification Thread Diameter              12.5 mm Thread Length                 22.0 mm Shaft Diameter                 8.0 mm

Hip Screw with Compression Screw 12.5mm is designed to provide strong and stable internal fixation of a variety of intertrochanteric, subtrochanteric and basilar neck fractures, with minimal soft tissue irritation.

Our Screws are made from finest quality medical grade material (Titanium and SS 316L) to ensure highest quality. Different sizes of Compression Screws are:

50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm and 120mm.

Femoral Neck Fracture Hip Compression Screw 12.5mm

PRINCIPLES

Displaced transcervical and subcapital fractures are unstable. Their prognosis is by and large the same and they will be discussed as one group for the purpose of manner of reduction and choice of fixation, should internal fixation be chosen as the method of treatment.

If added rotational stability is desired in addition to the Hip Compression Screw, a cannulated screw is inserted above and parallel in both planes to the DHS. It must be parallel in order not to block the sliding property of the DHS implant.

Positioning of the patient

The patient is positioned supine on the fracture table for closed reduction. The ipsilateral arm is elevated in a sling and the contralateral uninjured leg is placed on a leg holder.

If closed reduction is not successful the patient may be transferred to a conventional table for open reduction.

C-arm image intensifier control during surgery is a must.

Approaches for open reduction
For this procedure the following approaches may be used for open reduction:

• Anterolateral approach
• Iliofemoral approach

REDUCTION

Closed reduction
Reduction can usually be obtained with gentle traction and internal rotation of the fractured leg, carried out under image intensifier control. The reduction must be checked in both the AP and lateral view with an image intensifier.
Occasionally, anteroposterior pressure applied to the thigh may help to reduce retroversion.
If gentle closed reduction is unsuccessful, proceed to open reduction.
The reduction should restore anatomical alignment.

Open reduction
If closed reduction fails, an open reduction must be carried out. The reduction of the neck fracture is carried out under direct vision.
Once the capsule is opened up while applying traction the head is manipulated with hooks or K-wires, inserted to act as joy sticks until an anatomical reduction is achieved.

FIXATION WITH DHS

Technique of insertion

The first step is to position a guide wire on the neck and hammer it into the head. With the C-arm positioned to show the neck axis, slide the guide wire along the neck, parallel to its axis, and gently tap it into the head.
With the C-arm in the AP, make sure that the wire subtends the CCD (collum-center-diaphysis) angle of the neck. This will help you with the insertion of the guide wire for the Hip compression screw.

Insertion of the guide wire

Choose the correct aiming device according to the CCD angle of the neck. Check its position in the AP view with the image intensifier.
Insert the guide wire through the aiming device and advance it into the subchondral bone of the head, stopping 10 mm short of the joint.
In both the AP and lateral planes, the guide wire should be positioned along the axis of the neck and through the middle of the head, and advanced to within 5 mm of the subchondral bone.

Determination of the length of the Hip Compression screw
Determine the length of the Hip Compression screw with the help of the measuring device. Select a screw which is 10 mm shorter than the measured length.

Drilling
Adjust the cannulated triple reamer to the chosen length of the Hip Compression screw. Drill a hole for the DHS screw and the plate sleeve.

Hip Compression Screw insertion
The correct Hip Compression screw is mounted on the handle and inserted over the guide wire. By turning the handle it is advanced into the bone. Do not push forcefully or you may distract the fracture.
In young patients with hard bone it is best to use the tap to precut the thread for the hip compression screw. Otherwise the DHS screw may not advance, and you may actually displace the fracture by twisting the proximal fragment as you attempt to insert the screw.
When the hip compression screw has reached its final position (checked with the image intensifier: 10 mm short of the subchondral bone in the AP and lateral), the T-handle of the insertion piece should be parallel to the long axis of the bone to ensure the correct position of the plate.

Fixation of the DHS plate
Generally, a two-hole DHS plate with the preoperatively determined CCD angle will be chosen. Take the plate with the correct CCD angle, slide it over the guide wire, and mate it correctly with the screw. Then push it in over the screw and seat it home with the impactor.

Importance of screw position in intertrochanteric femoral fractures treated by Hip Compression Screw

Background

Tip-apex distance greater than 25 mm is accepted as a strong predictor of screw cut-out in patients with intertrochanteric femoral fracture treated by dynamic hip screw. The aim of this retrospective study was to evaluate the position of the screw in the femoral head and its effect on cut-out failure especially in patients with inconvenient tip-apex distance.

Patients and methods

Sixty-five patients (42 males, 23 females; mean age of 57.6 years) operated by dynamic hip screw for intertrochanteric femoral fractures were divided in two groups taking into consideration the tip-apex distance less (Group A; 14 patients) or more (Group B; 51 patients) than 25 mm. Patient’s age and gender, follow-up period, fracture type, degree of osteoporosis, reduction quality of the fracture, position of the screw in the femoral head, number of patients with cut-out failure and Harris hip score were compared.

Results

The average follow-up time was 41.7 months. The mean tip-apex distance was 17.14 mm in Group A and 36.67 mm in Group B. One (7.1%) patient in Group A and three (5.8%) patients in Group B had screw cut-out. Except the screw position, no statistical differences were observed between two groups with regards to study data’s. The screw was placed in femoral head more inferiorly (p = 0.045) on frontal and more posteriorly (p = 0.013) on sagital planes in Group B, while central placement of the screw was present in Group A. The common characteristic of three patients with screw cut-out in Group B was the position of the screw which was located in femoral head more superiorly and anteriorly after an acceptable fracture reduction.

Conclusions

Peripheral placement of the screw in femoral head increases tip-apex distance. However, posterior and inferior locations may help to support posteromedial cortex and calcar femoral in unstable intertrochanteric fractures and reduce the risk of cut-out failure.

The post Hip Screw with Compression Screw 12.5mm first appeared on Archoverseas.

608.10   10 mm

608.12   12 mm

608.14   14 mm

608.16   16 mm

608.18   18 mm

608.20   20 mm

608.22   22 mm REF. NO. LENGTH

608.24   24 mm

608.26   26 mm

608.28   28 mm

608.30   30 mm

608.35   35 mm

608.40   40 mm

608.45   45 mm REF. NO. LENGTH

608.50   50 mm

608.55   55 mm

608.60   60 mm

608.65   65 mm

608.70   70 mm

608.75   75 mm

608.80   80 mm

Technical Specification Thread Diameter                            4.0 mm Drill Bit for threaded Hole              2.5 mm Core Diameter                                1.9 mm Hexagonal Socket                           2.5 mm Head Diameter                               6.0 mm Shaft Diameter                               2.4 mm

4.0 mm Cancellous Bone Screw Short Thread Specification

• 4.0 mm Cancellous Bone Screw Short Thread available lengths are 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm and 80mm.
• 4.0 mm Cancellous Bone Screw Short Thread is made from pure Titanium and SS 316L.
• Any additional length sizes of this screw will be made on demand.
• This is Self Tapping Screw. Self Tapping Screws cuts its own thread while being driven into the bone. It makes a small hole while entering the bone which creates a tight friction fit between the threads. This helps fight vibration loosening and allows the parts to be taken apart if needed.
• Instruments are available for this screw such as Bone Taps, Combined Drill & Tap Sleeve, Counter Sink, Depth Gauge, Drill Bits, Drill Guide, Drill Sleeve, Hollow Mill Screw Removal, Reverse Measuring Device, Screw Drivers and Screw Holding Forceps etc.

4.0 mm Cancellous Bone Screw Short Thread uses

4.0 mm Cancellous Bone Screw Short Thread is intended for fracture fixation of large bones and large bone fragments.
This Screw is also indicated for :

• Femoral neck fractures
• Slipped capital femoral epiphyses
• As an adjunct to DHS in basilar neck fractures
• Tibial plateau fractures
• Ankle arthrodeses
• Pediatric femoral neck fractures
• Intercondylar femur fractures
• Sacroiliac joint disruptions
• Subtalar arthrodeses

Bone screws are the most commonly used orthopedic implants. There are many different types and sizes of screws for different types of bones. Most bone screws are made out of stainless steel or titanium alloys. The outer diameter, root diameter, and thread pitch and angle are important in determining screw mechanics.

In orthopedics, screws are typically described by their outer diameter, for example, a “4.0 mm Cancellous Bone Screw Short Thread” has an outside diameter of 4.0 mm. The pitch of a screw is the linear distance travelled by a screw for one full turn of the screw. The screw advances by a distance equal to the distance between the threads with each full turn. Cortical screws have a lower pitch and therefore more number of threads. Cancellous bone screws have a greater depth of the screw to increase the surface area and therefore improve the purchase, as the bone is weaker.

Screws function by converting the tightening torque into internal tension in the screw and elastic reactions in the surrounding bone. This creates compression between the fracture fragments that the screw is holding together. 4.0 mm Cancellous Bone Screw Short Thread is typically inserted into holes drilled equal to the root diameter and are either self-tapping or are inserted tapped (threaded) holes. The torque to insert cortical bone screws can be high, so the screws must be properly inserted into the correct size drilled hole and designed to withstand insertion torque levels expected in cortical bone. Cancellous bone screws have large, deep threads that grip the spongy bone well. Because of the relatively low strength of the cancellous bone, failure of the screw itself during insertion is rare, but pull out can be an issue.

The post Cancellous Bone Screws Short Thread 4.0mm first appeared on Archoverseas.

607.4520              20 mm

607.4522              22 mm

607.4524              24 mm

607.4526              26 mm

607.4528              28 mm

607.4530              30 mm REF. NO.            LENGTH

607.4535              35 mm

607.4540              40 mm

607.4545              45 mm

607.4550              50 mm

607.4555              55 mm

607.4560              60 mm REF. NO.            LENGTH

607.4565              65 mm

607.4570              70 mm

607.4575              75 mm

607.4580              80 mm

Technical Specification Thread Diameter                            4.5 mm Drill Bit for Threaded Hole             2.5 mm Core Diameter                                2.4 mm Hexagonal Socket                           3.5 mm Head Diameter                               8.0 mm

4.5 mm Cancellous Screw Full Thread Specification

• 4.5 mm Cancellous Screw Full Thread available lengths are 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm and 80mm.
• 4.5 mm Cancellous Screw Full Thread is made from pure Titanium and SS 316L.
• Any additional length sizes of this screw will be made on demand.
• This is Self Tapping Screw. Self Tapping Screws cuts its own thread while being driven into the bone. It makes a small hole while entering the bone which creates a tight friction fit between the threads. This helps fight vibration loosening and allows the parts to be taken apart if needed.
• Instruments are available for this screw such as Bone Taps, Combined Drill & Tap Sleeve, Counter Sink, Depth Gauge, Drill Bits, Drill Guide, Drill Sleeve, Hollow Mill Screw Removal, Reverse Measuring Device, Screw Drivers and Screw Holding Forceps etc.

4.5 mm Cancellous Screw Full Thread uses

4.5 mm Cancellous Screw Full Thread is intended for fracture fixation of large bones and large bone fragments.
This Screw is also indicated for:

• Femoral neck fractures
• Slipped capital femoral epiphyses
• As an adjunct to DHS in basilar neck fractures
• Tibial plateau fractures
• Ankle arthrodeses
• Pediatric femoral neck fractures
• Intercondylar femur fractures
• Sacroiliac joint disruptions
• Subtalar arthrodeses

Bone screws are the most commonly used orthopedic implants. There are many different types and sizes of screws for different types of bones. Most bone screws are made out of stainless steel or titanium alloys. The outer diameter, root diameter, and thread pitch and angle are important in determining screw mechanics.

In orthopedics, screws are typically described by their outer diameter, for example, a “4.5 mm Cancellous Screw Full Thread” has an outside diameter of 4.5 mm. The pitch of a screw is the linear distance travelled by a screw for one full turn of the screw. The screw advances by a distance equal to the distance between the threads with each full turn. Cortical screws have a lower pitch and therefore more number of threads. Cancellous bone screws have a greater depth of the screw to increase the surface area and therefore improve the purchase, as the bone is weaker.

Screws function by converting the tightening torque into internal tension in the screw and elastic reactions in the surrounding bone. This creates compression between the fracture fragments that the screw is holding together. 4.5 mm Cancellous Screw Full Thread is typically inserted into holes drilled equal to the root diameter and are either self-tapping or are inserted tapped (threaded) holes. The torque to insert cortical bone screws can be high, so the screws must be properly inserted into the correct size drilled hole and designed to withstand insertion torque levels expected in cortical bone. Cancellous bone screws have large, deep threads that grip the spongy bone well. Because of the relatively low strength of the cancellous bone, failure of the screw itself during insertion is rare, but pull out can be an issue.

The post Cancellous Screws Full Thread 4.5mm first appeared on Archoverseas.

606.10   10 mm

606.12   12 mm

606.14   14 mm

606.16   16 mm

606.18   18 mm

606.20   20 mm

606.22   22 mm

606.24   24 mm

606.26   26 mm REF. NO. LENGTH

606.28   28 mm

606.30   30 mm

606.35   35 mm

606.40   40 mm

606.45   45 mm

606.50   50 mm

606.55   55 mm

606.60   60 mm

Technical Specification Thread Diameter                            3.5 mm Drill Bit for Threaded Hole            2.5 mm Drill Bit for Gliding Hole                3.5 mm Core Diameter                               2.4 mm Hexagonal Socket                          2.5 mm Head Diameter                               6.0 mm

3.5 mm Cancellous Screw Specification

• 3.5 mm Cancellous Screw available lengths are 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, and 60mm.
• 3.5 mm Cancellous Screw is made from pure Titanium and SS 316L.
• Any additional length sizes of this screw will be made on demand.
• This is Self Tapping Screw. Self Tapping Screws cuts its own thread while being driven into the bone. It makes a small hole while entering the bone which creates a tight friction fit between the threads. This helps fight vibration loosening and allows the parts to be taken apart if needed.
• Instruments are available for this screw such as Bone Taps, Combined Drill & Tap Sleeve, Counter Sink, Depth Gauge, Drill Bits, Drill Guide, Drill Sleeve, Hollow Mill Screw Removal, Reverse Measuring Device, Screw Drivers and Screw Holding Forceps etc.

3.5 mm Cancellous Screw uses

3.5 mm Cancellous Screw is intended for fracture fixation of large bones and large bone fragments.
This Screw is also indicated for:

• Femoral neck fractures
• Slipped capital femoral epiphyses
• As an adjunct to DHS in basilar neck fractures
• Tibial plateau fractures
• Ankle arthrodeses
• Pediatric femoral neck fractures
• Intercondylar femur fractures
• Sacroiliac joint disruptions
• Subtalar arthrodeses

The post Cancellous Screws 3.5mm first appeared on Archoverseas.