Herbert Screws

2.5 mm Herbert Screws
3 mm Herbert Screws
3.5 mm Herbert Screws
4.5 mm Herbert Screws
5.5 mm Herbert Screws
6.5 mm Herbert Screws

Herbert Screws Specification

  • Herbert Screws have headless design, it means that the screw is completely embedded in the bone, without any protrusions to cause tissue irritation even in intra-articular placement.
  • Cannulation helps ensure precise placement of the screw.
  • Herbert Cannulated Guide Pins hold the fragment and act as guides for drilling, tapping, and screw placement.
  • The thread design of the Screw creates compression and provides fracture stability. As the proximal threads engage the bone, the fracture is drawn together, helping to create and maintain stability of the fracture site.
  • Screws available in both Titanium and Stainless Steel.

Herbert Screws

Herbert Screws Uses

Herbert Screws are designed for the management of fractures where minimal tissue coverage makes standard screw use inappropriate or where extreme precision in fragment alignment is imperative. Such locations might include fractures of the:
Olecranon and malleolar region
Distal femur
Proximal tibia
Distal tibia

  • 2.5 mm and 3 mm Herbert Screws are indicated for fixation of fractures and nonunions of small bones and small bone arthrodeses, including scaphoid fractures; intraarticular fractures of the tarsals, metatarsals, carpals and metacarpals; bunionectomies and osteotomies; arthrodeses of small joints (e.g. phalanges); fractures of the patella, ulna and radial styloid.
  • 3.5 mm and 4.5 mm Herbert Screws are intended for fixation of intra-articular and extra-articular fractures and nonunions of small bones and small bone fragments; arthrodeses of small joint; bunionectomies and osteotomies, including scaphoid and other carpal bones, metacarpals, tarsals, metatarsals, patella, ulnar styloid, capitellum, radial head and radial styliod.
  • 5.5 mm and 6.5 Herbert Screws are indicated for fracture fixation, reconstruction, osteotomy, and arthrodesis of various bones and bone fragments including joint fusions (arthrodeses) in the foot and fixation of intra-articular fractures of the humerus, femur and tibia.

Herbert Screws Uses

Herbert Screws Instruments Set

Herbert Screws Instruments Set Image

A complete instruments set are available for Herbert Screws. Instruments can be modified according to the customer’s requirement with minimum quantity required. All these instruments can be used several times.

We are keeping wide range of  instruments items in this set to ensures that Doctors get almost all required items during Surgery. Below is list of items of this set.

  • Cannulated Screw Driver, 1.5 mm Tip – 1 Qty
  • Cannulated Screw Driver, 2.0 mm Tip – 1 Qty
  • Cannulated Screw Driver, 2.5 mm Tip – 1 Qty
  • Cannulated Screw Driver, 3.0 mm Tip – 1 Qty
  • Cannulated Screw Driver, 3.5 mm Tip – 1 Qty
  • Cannulated Drill Bit, 2 mm – 2 Qty
  • Cannulated Drill Bit, 2.5 mm – 2 Qty
  • Cannulated Drill Bit, 2.7 mm – 2 Qty
  • Cannulated Drill Bit, 3.2 mm – 2 Qty
  • Cannulated Drill Bit, 4 mm – 2 Qty
  • Double Drill Guide, 2 x 0.8 mm – 1 Qty
  • Double Drill Guide, 2.5 x 1 mm – 1 Qty
  • Double Drill Guide, 2.7 x 1.2 mm – 1 Qty
  • Double Drill Guide, 3.2 x 1.1 mm – 1 Qty
  • Double Drill Guide, 4 x 1.8 mm – 1 Qty
  • Guide Wire, 0.8 mm – 10 Qty
  • Guide Wire, 1.2 mm – 10 Qty
  • Guide Wire, 1.8 mm – 5 Qty
  • Graphics Aluminum Box with Silicone Fittings – 1 Qty

Herbert Screws Sizes

2.5 mm Screws Length

8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm and 30mm.

3 mm Screws Length

8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm and 30mm.

3.5 mm Screws Length

8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm and 80mm.

4.5 mm Screws Length

8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm and 80mm.

5.5 mm Screws Length

12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm and 120mm.

6.5 mm Screws Length

12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm and 120mm.

Herbert Screws Surgical Technique

STEP 1: Preparation and Insertion of Guide Wire

Select the correct guide wire and drill guide for the chosen Herbert Screws diameter. Make a stab incision and dissect a clean approach to the desired region of the bone where the compression screw will be inserted.

Properly reduce the bones intended to be repaired by the CCHS screw. Align the guide wire end of the drill guide in the direction of screw insertion. Feed the guide wire through the drill guide and advance it into the bone to the desired depth and position.

Fluoroscopy should be used to ensure correct guide wire position, alignment, and depth. If using the Tissue Protector, the Guide Wire Sleeve is inserted into the Tissue Protector to guide the guide wire. The Guide Wire Sleeve has press-fi t tabs for sleeve retention during use.

STEP 2: Herbert Screws Length Determination

Select the correct direct measuring device for the chosen screw diameter. Slide the narrow end of the direct measuring device over the guide wire and place it flush against the bone. Record the measurement at the end of the guide wire to determine the depth of the guide wire in the bone. This depth should be used to determine the length of the corresponding screw.

STEP 3: Predrilling

Select the correct drill size for the chosen Herbert Screws diameter. Align the drill end of the drill guide over the guide wire. Feed the drill through the drill guide and over the wire, and drill to the desired depth. Drill over the guide wire to the desired depth. Fluoroscopy should be used to ensure correct drill alignment and depth. Back the drill out of the bone once the desired depth has been reached without removing the guide wire.

STEP 4: Countersink

Select the correct countersink for the chosen screw diameter. Pass the countersink over the guide wire. Advance the countersink tip into the bone by applying pressure and repeatedly rotating the countersink construct clockwise to the desired depth. The black line on the countersink represents the height of the screw head.

STEP 5: Screw Insertion

Select the correct cannulated driver and handle with appropriate coupling for the chosen screw diameter. Pass the Herbert Screws over the guide wire. Using the driver, advance the screw into position. Compression is applied by rotating the driver clockwise until all distal threads have passed into the distal fragment. Compression cannot be achieved if the screw threads bridge the fracture gap.

Fluoroscopy should be used to ensure correct positioning of the screw. Advance the screw to the desired depth. The screw has a headless design that is intended to sit below the surface of the bone to minimize impingement or soft tissue irritation.

Remove the guide wire

STEP 6: Herbert Screws Removal

The Herbert Screws may be removed by using the drivers. Clear any tissue overgrowth from the screw head recess. Insert the driver and turn counterclockwise. If alignment is difficult, a guide wire may be inserted through the screw cannula to facilitate driver alignment. In this case the cannulated driver must be used.

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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 “2.5 mm Herbert Screws” has an outside diameter of 2.5 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. 2mm Cortical 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.

Herbert Screws Contraindications

Contraindications may be qualified or total, and need to be taken into consideration when evaluating the prognosis in each case. The physician’s education, training and professional judgement must be relied upon to choose the most appropriate device and treatment. Conditions presenting an increased risk of failure include:

  • Any active or suspected latent infection or marked local inflammation in or about the affected area.
  • Compromised vascularity that would inhibit adequate blood supply to the fracture or the operative site.
  • Bone stock compromised by disease, infection or prior implantation that can not provide adequate support and/or fixation of the devices.
  • Material sensitivity, documented or suspected.
  • Obesity. An overweight or obese patient can produce loads on the implant that can lead to failure of the fixation of the device or to
    failure of the device itself.
  • Patients having inadequate tissue coverage over the operative site.
  • Implant utilization that would interfere with anatomical structures or physiological performance.
  • Any mental or neuromuscular disorder which would create an unacceptable risk of fixation failure or complications in postoperative care.
  • Other medical or surgical conditions which would preclude the potential benefit of surgery.
  • All associated diseases which could endanger the function and success of the Herbert Screws.

Warnings and Precautionary for Herbert Screws

Before using Herbert Screws, the surgeon and ancillary staff should study the safety information in these instructions, as well as any product-specific information in the product description, surgical procedures and/or brochures.

Herbert Screws is made from medical grade materials and are designed, constructed and produced with utmost care. These quality Screws assure best working results provided they are used in the proper manner. Therefore, the following instructions for use and safety recommendations must be observed.

Improper use of  Screws can lead to damage to the tissue, premature wear, destruction of the instruments and injury to the operator, patients or other persons.

It is vital for the operating surgeon to take an active role in the medical management of their patients. The surgeon should thoroughly understand all aspects of the surgical procedure and instruments including their limitations. Care in appropriate selection and proper use of surgical instruments is the responsibility of the surgeon and the surgical team. Adequate surgical training should be completed before use of implants.

Factors which could impair the success of the operation:

  • Allergies to implanted materials.
  • Localized bone tumours.
  • Osteoporosis or osteomalacia.
  • System disease and metabolic disturbances.
  • Alcohol and drug abuse.
  • Physical activities involving excessive shocks, whereby the implant is exposed to blows and/or excessive loading.
  • Patients who are mentally unable to understand and comply with the doctor’s instructions.
  • Poor general health.

Possible Adverse Effects

The following adverse effects are the most common resulting from implantation:

  • Loosening of the Screws, which may result from cyclic loading of the fixation site and/or tissue reaction of the implant.
  • Early and late infection.
  • Further bone fracture resulting from unusual stress or weakened bone substance.
  • Temporary or chronic neural damage resulting from pressure or hematomata.
  • Wound hematomas and delayed wound healing.
  • Vascular disease including venal thrombosis, pulmonary embolism and cardiac arrest.
  • Heterotopic ossification.
  • Pain and discomfort due to presence of the Screws.
  • Mechanical failure of the implant, including bending, loosening or breakage.
  • Migration of implant resulting in injury.

Preoperative Planning for Herbert Screws

The operating planning is carried out following a thorough clinical evaluation of the patient, Also, x-rays must be taken to allow a clear indication of the bony anatomy and associated deformities. At the time of the operation, the corresponding implantation instruments in addition to a complete size of Herbert Screws must be available.

The clinician should discuss with the patient the possible risks and complications associated with the use of implants. It is important to determine pre-operatively whether the patient is allergic to any of the implant materials. Also, the patient needs to be informed that the performance of the device cannot be guaranteed as complications can affect the life expectancy of the device.

Herbert Screws Precautions

  • Confirm functionality of instruments and check for wear during reprocessing. Replace worn or damaged instruments prior to use.
  • It is recommended to use the instruments identified for this Herbert Screws.
  • Handle devices with care and dispose worn bone cutting instruments in a sharps container.
  • Always irrigate and apply suction for removal of debris potentially generated during implantation or removal.

Herbert Screws Warnings

  • Herbert Screws can break during use (when subjected to excessive forces). While the surgeon must make the final decision on removal of the broken part based on associated risk in doing so, we recommend that whenever possible and practical for the individual patient, the broken part should be removed. Be aware that implants are not as strong as native bone. Implants subjected to substantial loads may fail.
  • Instruments, screws and cut plates may have sharp edges or moving joints that may pinch or tear user’s glove or skin.
  • Take care to remove all fragments that are not fixated during the surgery.
  • While the surgeon must make the final decision on implant removal, we recommend that whenever possible and practical for the individual patient, fixation devices should be removed once their service as an aid to healing is accomplished. Herbert Screws removal should be followed by adequate post-operative management to avoid refracture.

Herbert Screws General Adverse Events

As with all major surgical procedures, risks, side effects and adverse events can occur. While many possible reactions may occur, some of the most common include: Problems resulting from anesthesia and patient positioning (e.g. nausea, vomiting, dental injuries, neurological impairments, etc.), thrombosis, embolism, infection, nerve and/or tooth root damage or injury of other critical structures including blood vessels, excessive bleeding, damage to soft tissues incl. swelling, abnormal scar formation, functional impairment of the musculoskeletal system, pain, discomfort or abnormal sensation due to the presence of the device, allergy or hypersensitivity reactions, side effects associated with hardware prominence, loosening, bending, or breakage of the device, mal-union, non-union or delayed union which may lead to breakage of the Herbert Screws, reoperation.