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Our paper presents three new cases of chondrosarcoma of the foot and a clinical analysis of all the known cases of similar tumors. We feel that surgery is still the treatment of choice and recurrence and metastases are uncommon following adequate surgical treatments., (Copyright 2013, SLACK Incorporated.)

This paper describes the techniques for combining arthroscopic treatment of unicompartmental osteoarthritic knees and proximal tibial osteotomy., (Copyright 2013, SLACK Incorporated.)

This paper presents a report of a case with vertebral metastatic chemodectoma with neurological complication who was treated successfully. A review of the literature on vertebral metastatic chemodectoma is also presented., (Copyright 2013, SLACK Incorporated.)

The analysis of retrieved implant devices can provide information unavailable through any other method. With the variety of implant designs rapidly increasing, retrieval and analysis of failed cases is an important means of evaluating existing designs, as well as suggesting modifications that might improve implant performance. This paper describes a case in which design considerations, rather than mechanical or material failure, appeared to be a major contributing factor.Sixteen months after insertion of a Howmedica Kinematic Rotating Hinge knee, the patient complained of barometric pain in the knee. Roentgenograms at that time showed the metallic axle component to be protruding laterally. Upon retrieval the polyethylene bumper-lock component exhibited deep scalloping on its surface, which unlocked the axle and allowed it to slide out., (Copyright 2013, SLACK Incorporated.)

The paper describes initial results of above-lesion electromyographic (EMG) controlled functional electrical stimulation (FES) of paraplegics. Such controlled stimulation is to provide upper-motor-neuron paraplegics (T5 to T12) with self-controlled standing and some walking without braces and with only the help of walkers or crutches. The above-lesion EMG signal employed serves to map the posture of the patient's upper trunk via a computerized mapping of the temporal patterns of that EMG. Such control also has an inherent safety feature in that it prevents the patient from performing a lower-limb movement via FES unless his trunk posture is adequate., (Copyright 2013, SLACK Incorporated.)

Adhesive taping provides an effective form of early treatment of talipes equinovarus. This paper describes the technique of taping in detail. Its main advantage over rigid immobilization is that continuous stretching can be carried out during the newborn period. The basic principles of early diagnosis and treatment do not vary from other treatment programs. However, taping and continuous stretching (followed as needed by cast and surgical treatment) may offer some advantages., (Copyright 2013, SLACK Incorporated.)

The major problem with total wrist arthroplasty has been "imbalance" resulting from a lack of information on where to position the axes of motion of the prosthesis. This paper presents a precise method for determining the optimal location for the axes of motion of the prosthesis in any patient's wrist. It is based on a study of the normal biomechanics and was tested clinically in ten patients. The resultant "balance" and range of motion were excellent. A new prosthesis design evolved from this work which should simplify the operative procedure and make the results more reliable., (Copyright 2013, SLACK Incorporated.)

This paper presents a modification of bone graft technique in total hip arthroplasty in the deficient acetabulum. A crescent of autogenous femoral head is secured by screw fixation from a single-side to achieve bony support for the acetabulum. This modification allows hip arthroplasty in indicated patients with a minimum of additional surgical exposure. A case report illustrates the technique., (Copyright 2013, SLACK Incorporated.)

Osteomyelitis, although a rather common disease process in children and adolescents, only rarely affects the clavicle. In previously recorded series, the incidence of clavicular involvement has varied between 0 and 7%.1-7 Due to the infrequency with which the disease occurs, the diagnosis is often delayed or overlooked entirely. In the series reported by Srivastava, their average time from inception to diagnosis was over fourteen weeks.8 The presenting clinical features are not always succinct and revealing of clavicular involvement, making it incumbent upon the treating physician to become aware of this entity and harbor a reasonably high incidence of suspicion. It is our purpose in presenting this paper to describe three cases of clavicular osteomyelitis in children, to review the clinical findings, emphasize the diagnostic features, and discuss appropriate treatment., (Copyright 2013, SLACK Incorporated.)

Chemonucleolysis must relieve sciatic pain by some means other than the removal of the disc protrusion from the neural canal, because the protrusion characteristically persists despite the resolution of sciatic pain. This paper analyzes the mechanism of symptom production in sciatica and identifies how chemonucleolysis relieves these symptoms.Pressure can be exerted on a nerve root by a disc protrusion without compression against the posterior wall of the neural canal. This pressure is the result of tension produced in the nerve root when it is deformed by the disc protrusion. A previously unrecognized principle of nerve root-disc protrusion mechanics is identified. For a given disc protrusion, narrowing the disc reduces the tension in the nerve root and therefore the pressure on the nerve root; conversely, widening the disc increases the tension and pressure on the nerve root. Disc narrowing is in itself a mechanism by which chemonucleolysis relieves sciatic pain., (Copyright 2013, SLACK Incorporated.)

This paper is a case report of an obese black female with infantile tibia vara and slipped capital femoral epiphysis. Two cases of tibia vara and slipped capital femoral epiphysis in obese black male patients have previously been reported. The infrequent occurrence of this association of abnormalities precludes defining a common etiology of their pathogenesis. Abnormal pressures are implicated in the pathogenesis of both diseases., (Copyright 2013, SLACK Incorporated.)

Although there is a general awareness developing about the role of Pseudomonas aeruginosa in producing osteomyelitis following puncture wounds of the foot, it is not generally appreciated that other organisms may gain access to the bones of the foot following penetrating injuries. This paper addresses two additional cases of osteomyelitis produced by organisms other than Pseudomonas, and characterized by the same indolent course. It is emphasized that puncture wound osteomyelitis generally requires surgical intervention, not only for proper diagnosis, but for evacuation of the infective process., (Copyright 2013, SLACK Incorporated.)

Emergency amputation in the critically ill is associated with 17 to 25% mortality, and a high rate of postoperative infection. Mortality arid morbidity can be reduced by freezing the diseased tissues with dry ice, and deferring surgery until the patient is rendered stable, and metabolically able to heal. Methods of freezing previously reported are cumbersome to maintain, and prone to complications. This paper presents a safe and simple method of physiologic amputation, with emphasis on those details useful to the institution or practitioner who will only occasionally use it. Three illustrative cases demonstrate the utility of this form of treatment in the presence of anticoagulation, gas gangrene, and extreme debility, rendering the patient unable to heal central and peripheral injury simultaneously. Concomitant K-wire fixation and hip disarticulation preceded by above knee freezing, not previously reported, were used successfully., (Copyright 2013, SLACK Incorporated.)

External fixation of fractures, unlike other forms of treatment, can provide an accurate and variable control of the mechanical conditions of the fracture. Extremely stable conditions, with correct positioning of the bone screws, will reduce the risk of overloading the bone screws and bone interface, which would otherwise cause necrosis and bone loosening. This paper describes the development of a rigid single-side fixation system with a controllable degree of relative axial movement of the fractured bone to promote bone consolidation and healing. This single-side system has been used to measure fracture stiffness throughout rehabilitation by the attachment of a specially developed strain gauge transducer. Over the last three years, patient analysis has been carried out in a routine clinic using this system. Typical examples of results of these tests are shown. Test results are used by the clinician to monitor different regimens of treatment and as a guide to indicate when the fixator should be removed., (Copyright 2013, SLACK Incorporated.)

Bioelectric effects on bone have recently stimulated much interest and research. This paper reviews the current literature regarding the electrical stimulation of bone, and introduces an independent prospective study from Rancho Los Amigos Hospital reviewing our results with its use on nonunions.We have basically followed Brighton's technique for electrical stimulation. This consists of percutaneous Teflon coated Steinmann pin electrodes inserted directly into the area of nonunion. An external power pack delivers 20 ma continuously for three months. We have differed from Brighton in that four of eight patients were immobilized by a Hoffman external fixation device. The Hoffman device was left in place six months.Eight patients have undergone treatment. Four patients (3 tibias and 1 femur) had Hoffman stabilization and have successfully completed treatment. They had all failed previous multiple surgical treatments. One other patient healed with only dummy electrode implantation. The other three cases were unable to complete the entire three months of stimulation due to complications, and remained as nonunions.The results of our study have been encouraging. Electrical stimulation of bone may soon be added to the armamentarium of the practicing orthopedic surgeon., (Copyright 2013, SLACK Incorporated.)

This paper is a follow-up report on the subject of the use of dacron vascular graft material to repair major tendons. This paper examines the long term fate of one of these grafts, based on an examination at autopsy of an Achilles tendon repaired with this type of graft., (Copyright 2013, SLACK Incorporated.)

Summary: The occurrence of two cases of brachial plexus as a complication of Risser hyperextension cast is reported. The symptoms started just after application of the cast, and both cases had complete resolution of the problem a few months after thecast was removed. The paper should bring attention to the lesion and should emphasize the necessity of removing the cast when the diagnosis is made, regardless of whether or not there is local pressure., (Copyright 2013, SLACK Incorporated.)

This paper discusses the case report of a 7-year-old white female who presented with acute onset of left shoulder pain. No history of trauma or overuse could be elicited. Physical examination and radiographs confirmed the diagnosis of calcific tendinitis of the subscapularis muscle. Because of continued severe symptoms, the patient underwent surgical decompression of the involved shoulder with complete resolution of symptoms. A search of the literature failed to confirm one documented case of calcific tendinitis in the immature skeleton. A discussion as to the etiology of calcific tendinitis and/or bursitis as it relates to this case is presented., (Copyright 2013, SLACK Incorporated.)

This paper reports four cases of trigger finger that resulted from partial laceration of the flexor tendons. Of the four cases, there were one profundus and three superficialis tendons in three males and one female, ranging from 13 to 36 years of age. They were all treated surgically by excision of the "tag" with full functional recovery., (Copyright 2013, SLACK Incorporated.)

Implantations of aluminum oxide prostheses were started in 1972 for two reasons: firstly, because ceramic is completely bioinert and secondly, because when paired with ceramic it exhibits excellent friction properties. The following paper discusses the advantages and disadvantages of ceramic endoprostheses., (Copyright 2013, SLACK Incorporated.)

This paper reports a synovial chondrosarcoma in the knee of a thirty-four year old white male. An above-knee amputation produced a more than 12 year cure for this patient., (Copyright 2013, SLACK Incorporated.)

The purpose of this paper is to document the frequency and serious nature of complications associated with ipsilateral femur and tibia fractures. This study is based on 23 consecutive cases reviewed during a five-year period. The emphasis is on the severity of the associated injury in other body systems, the relationship of the tibial fracture to the complications observed, and the high incidence of unrecognized knee ligament injuries., (Copyright 2013, SLACK Incorporated.)

Our paper describes the clinical features, roentgenographic manifestations, pathology and the results of various modalities of treatments of 46 cases of Ewing's sarcoma seen and treated at Henry Ford Hospital during the past 36 years. Surgery alone (4 cases) produced a 25% five-year survival rate, whereas radiotherapy alone (33 cases) yielded only a 3% five-year survival rate. Radiotherapy plus chemotherapy (9 cases) have proven to be far superior than radiotherapy alone. The overall five-year survival rate of our series is only 7%., (Copyright 2013, SLACK Incorporated.)

An intraneural cyst is a rare condition. This paper describes one such case, discusses the clinical picture and possible etiology, and reviews the methods of treatment reported in the literature., (Copyright 2013, SLACK Incorporated.)