The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

J Richards - One of the best experts on this subject based on the ideXlab platform.

  • Laboratory comparison of the cannulated Herbert bone Screw with ASIF cancellous lag Screws./ Bone and Joint Surg., 75-B(l
    2016
    Co-Authors: P D Marshall, P D Evans, J Richards
    Abstract:

    The compression produced by and the resistance to pullout of the 6.5 mm cannulated Herbert Screw were compared with those of ASIF headed Screws. The latter were tested with and without washers and in the following sizes: 4.5 mm cortical, 6.5 mm cancellous with a 16 mm threaded segment, and 6.5 mm cancellous with a 32 mm threaded segment. Polyurethane foam was used as a substitute for cancellous bone and ASIF artificial bone for corticocancellous bone. The compression produced by a cancellous lag Screw with a washer was significantly greater than that produced by a Herbert Screw of equivalent size (p < 0.05). When the Screws were tested using the corticocancellous composite the ASIF cancellous Screw without a washer produced significantly greater compression (p < 0.05); when used with a washer the difference was highly significant (p < 0.001). The dual pitch Herbert Screw is not appropriate for the management of fractures in which compression is of greater importance than the need to avoid prominence of the Screw head

  • laboratory comparison of the cannulated Herbert bone Screw with asif cancellous lag Screws
    1993
    Co-Authors: P D Marshall, P D Evans, J Richards
    Abstract:

    The compression produced by and the resistance to pullout of the 6.5 mm cannulated Herbert Screw were compared with those of ASIF headed Screws. The latter were tested with and without washers and in the following sizes: 4.5 mm cortical, 6.5 mm cancellous with a 16 mm threaded segment, and 6.5 mm cancellous with a 32 mm threaded segment. Polyurethane foam was used as a substitute for cancellous bone and ASIF artificial bone for corticocancellous bone. The compression produced by a cancellous lag Screw with a washer was significantly greater than that produced by a Herbert Screw of equivalent size (p

  • laboratory comparison of the cannulated Herbert bone Screw with asif cancellous lag Screws
    1993
    Co-Authors: P D Marshall, P D Evans, J Richards
    Abstract:

    The compression produced by and the resistance to pullout of the 6.5 mm cannulated Herbert Screw were compared with those of ASIF headed Screws. The latter were tested with and without washers and in the following sizes: 4.5 mm cortical, 6.5 mm cancellous with a 16 mm threaded segment, and 6.5 mm cancellous with a 32 mm threaded segment. Polyurethane foam was used as a substitute for cancellous bone and ASIF artificial bone for corticocancellous bone. The compression produced by a cancellous lag Screw with a washer was significantly greater than that produced by a Herbert Screw of equivalent size (p < 0.05). When the Screws were tested using the corticocancellous composite the ASIF cancellous Screw without a washer produced significantly greater compression (p < 0.05); when used with a washer the difference was highly significant (p < 0.001). The dual pitch Herbert Screw is not appropriate for the management of fractures in which compression is of greater importance than the need to avoid prominence of the Screw head.

James W Strickland - One of the best experts on this subject based on the ideXlab platform.

  • arthrodesis of the proximal interphalangeal joint of the finger comparison of the use of the Herbert Screw with other fixation methods
    1994
    Co-Authors: Stephen J Leibovic, James W Strickland
    Abstract:

    We report a retrospective review of 224 proximal interphalangeal joint arthrodeses in the digits using Herbert Screws (37), Kirschner wires (100), tension band wiring (69), plates (11), and other miscellaneous techniques (7) for fixation. Average time to clinical union was 7 weeks and time to radiographic union was 10 weeks. Nonunion occurred in 31 cases (24 digits). The primary nonunion rate was highest in psoriatic arthritis, intermediate in rheumatoid arthritis, lower in acute trauma and post-traumatic reconstruction, and nonexistent in osteoarthritis. The primary nonunion rate was highest using Kirschner wires, intermediate using tension band wires, and lowest using Herbert Screws. All Kirschner wires, six tension band wires and one Herbert Screw were removed after fusion. The Herbert Screw provides secure fixation, is easy to insert, and affords a rapid and reliable arthrodesis at the proximal interphalangeal joint.

P D Marshall - One of the best experts on this subject based on the ideXlab platform.

  • Laboratory comparison of the cannulated Herbert bone Screw with ASIF cancellous lag Screws./ Bone and Joint Surg., 75-B(l
    2016
    Co-Authors: P D Marshall, P D Evans, J Richards
    Abstract:

    The compression produced by and the resistance to pullout of the 6.5 mm cannulated Herbert Screw were compared with those of ASIF headed Screws. The latter were tested with and without washers and in the following sizes: 4.5 mm cortical, 6.5 mm cancellous with a 16 mm threaded segment, and 6.5 mm cancellous with a 32 mm threaded segment. Polyurethane foam was used as a substitute for cancellous bone and ASIF artificial bone for corticocancellous bone. The compression produced by a cancellous lag Screw with a washer was significantly greater than that produced by a Herbert Screw of equivalent size (p < 0.05). When the Screws were tested using the corticocancellous composite the ASIF cancellous Screw without a washer produced significantly greater compression (p < 0.05); when used with a washer the difference was highly significant (p < 0.001). The dual pitch Herbert Screw is not appropriate for the management of fractures in which compression is of greater importance than the need to avoid prominence of the Screw head

  • laboratory comparison of the cannulated Herbert bone Screw with asif cancellous lag Screws
    1993
    Co-Authors: P D Marshall, P D Evans, J Richards
    Abstract:

    The compression produced by and the resistance to pullout of the 6.5 mm cannulated Herbert Screw were compared with those of ASIF headed Screws. The latter were tested with and without washers and in the following sizes: 4.5 mm cortical, 6.5 mm cancellous with a 16 mm threaded segment, and 6.5 mm cancellous with a 32 mm threaded segment. Polyurethane foam was used as a substitute for cancellous bone and ASIF artificial bone for corticocancellous bone. The compression produced by a cancellous lag Screw with a washer was significantly greater than that produced by a Herbert Screw of equivalent size (p

  • laboratory comparison of the cannulated Herbert bone Screw with asif cancellous lag Screws
    1993
    Co-Authors: P D Marshall, P D Evans, J Richards
    Abstract:

    The compression produced by and the resistance to pullout of the 6.5 mm cannulated Herbert Screw were compared with those of ASIF headed Screws. The latter were tested with and without washers and in the following sizes: 4.5 mm cortical, 6.5 mm cancellous with a 16 mm threaded segment, and 6.5 mm cancellous with a 32 mm threaded segment. Polyurethane foam was used as a substitute for cancellous bone and ASIF artificial bone for corticocancellous bone. The compression produced by a cancellous lag Screw with a washer was significantly greater than that produced by a Herbert Screw of equivalent size (p < 0.05). When the Screws were tested using the corticocancellous composite the ASIF cancellous Screw without a washer produced significantly greater compression (p < 0.05); when used with a washer the difference was highly significant (p < 0.001). The dual pitch Herbert Screw is not appropriate for the management of fractures in which compression is of greater importance than the need to avoid prominence of the Screw head.

Timothy J Herbert - One of the best experts on this subject based on the ideXlab platform.

  • Herbert Screw fixation of scaphoid fractures
    1996
    Co-Authors: Timothy J Herbert, S L Filan
    Abstract:

    We reviewed the records of 431 patients who had open reduction and internal fixation of the scaphoid performed by one surgeon (TJH) over a 13-year period. The Herbert bone Screw provided adequate internal fixation without the use of plaster immobilisation, promoting a rapid functional recovery. On average, patients returned to work 4.7 weeks after surgery and wrist function was significantly improved, even when the fracture failed to unite. Healing rates for acute fractures were better than those reported for plaster immobilisation and were independent of fracture location. In the case of established nonunions, healing depended on the stage and location of the fracture, but the progress of arthritis was halted and carpal collapse significantly improved. Internal fixation of the scaphoid using the Herbert bone Screw, although technically demanding, has few complications and appears to offer significant advantages over other methods of treatment.

  • acute rotary dislocation of the scaphoid a new technique of repair using Herbert Screw fixation across the scapho lunate joint
    1991
    Co-Authors: Timothy J Herbert
    Abstract:

    Acute rotary dislocation of the scaphoid is commonly misdiagnosed and, if untreated, leads to progressive osteoarthritis of the wrist. The diagnosis requires a high degree of awareness and an understanding of the pathomechanics of the injury. To date, no single method of treatment has been shown to produce consistently satisfactory results. This paper presents a new surgical technique involving open reduction and reattachment of the ligament to the bone, combined with Herbert Screw fixation across the scapho-lunate joint. The Screw is normally left in situ for 12-18 months, allowing sufficient time for ligament healing and restoration of carpal stability. Using this technique early postoperative wrist motion is possible. Although excellent results have been achieved in the majority of cases, a few patients have developed increasing carpal collapse deformity in spite of adequate internal fixation, presumably due to inadequacy of the volar carpal ligaments. However, although the technique is a demanding one, the Herbert bone Screw appears to offer significant advantages over standard Kirschner wire fixation in the treatment of acute rotary dislocation of the scaphoid.

Yoshio Kuwahata - One of the best experts on this subject based on the ideXlab platform.

  • osteochondritis dissecans of the elbow managed by Herbert Screw fixation
    1998
    Co-Authors: Yoshio Kuwahata, Goro Inoue
    Abstract:

    Seven patients (eight elbows) with osteochondritis dissecans were treated with cancellous bone grafts and internal fixation of the fragment using a Herbert Screw. Average follow-up was 32 months. All patients were pain-free and returned to previous sporting activities. The postoperative range of motion of the elbow increased by an average of 18 degrees. Radiographs showed complete reossification of the capitular cyst and normally contoured joint surface.

  • Herbert Screw fixation for scaphoid nonunions an analysis of factors influencing outcome
    1997
    Co-Authors: Goro Inoue, Kaori Shionoya, Yoshio Kuwahata
    Abstract:

    A retrospective review of 160 cases of scaphoid nonunion treated by internal fixation using a Herbert Screw with bone grafting was conducted at an average followup of 24 months. Definite radiographic union was achieved in 90% of cases. Based on Cooney's clinical scoring system, 80 cases had an excellent result, 37 had a good result, 33 had a fair result, and 10 had a poor result. Failure of union was related to the existence of avascular changes of the proximal fragment, instability of the fracture fragment, the prolonged delay in surgery, and the location of the fracture site. In the united scaphoids, the lengthy period of postoperative immobilization, the existence of osteoarthritis, and the prolonged delay in surgery were significant factors in the patient's functional outcome. Overall, the results do not support the view that a residual flexion deformity of the scaphoid is less likely to yield a satisfactory outcome, although it seems worthwhile to correct excessive angulation at the time of repair to promote an anatomic union, thereby preventing early arthritis. A bone graft with internal fixation using a Herbert Screw and a shorter period of immobilization may give a satisfactory functional result when the nonunion is treated before the onset of arthritic changes in the wrist.

  • repeat Screw stabilization with bone grafting after a failed Herbert Screw fixation for acute scaphoid fractures and nonunions
    1997
    Co-Authors: Goro Inoue, Yoshio Kuwahata
    Abstract:

    Eight patients with persistent nonunions after failure of a Herbert Screw fixation for both acute scaphoid fractures and nonunions underwent repeat Screw internal fixation and bone grafting. They were followed for at least 1 year (average, 19 months) after their last surgical procedure. In 6 patients, union was achieved following the second surgery. These patients were pain free and resumed their previous occupations. The average range of wrist mobility was 87% of that of the uninvolved wrist, and grip strength averaged 93% of that of the uninvolved wrist. In 1 of the 2 patients with an unsuccessful outcome after the second procedure, union was achieved after a third procedure was performed that involved an inlay bone graft and internal fixation using a Kirschner wire. The remaining patient had relief of pain following denervation of the wrist joint. These 2 patients did not show marked clinical improvement and required a change of employment of light work. On the basis of study findings, it appears that revision with a repeat Herbert Screw fixation and bone grafting is the treatment of choice for patients with persistent scaphoid nonunions following an unsuccessful Herbert Screw procedure in which the Screw is not correctly placed.

  • ununited proximal pole scaphoid fractures treatment with a Herbert Screw in 16 cases followed for 0 5 8 years
    1997
    Co-Authors: Goro Inoue, Kaori Shionoya, Yoshio Kuwahata
    Abstract:

    We treated 16 cases of delayed union and nonunion of proximal one-third scaphoid fractures with cancellous bone grafting and retrograde insertion of a Herbert Screw through a dorsal approach. Definite radiographic union was obtained in 13 of 16 patients after a median of 2 (0.5-8) years of follow-up. Using Cooney's clinical scoring system, 5 cases were excellent, 5 good, 5 fair and 1 poor. The treatment of ununited proximal pole scaphoid fractures with retrograde insertion of the Herbert Screw offers the advantages of a short period of immobilization and a good function.