In a series of over 1000 elderly patients with femoral neck fracture, who were routinely screened by iliac crest bone biopsy, a 2% prevalence of osteomalacia was found. This low figure suggests that osteomalacia is not a significant predisposing factor in the development of these fractures and that routine screening is not cost-effective

A prospective study of factors which might help to predict mortality in patients with intracapsular fractures of the femoral neck has been undertaken. A multivariate analysis technique was used to analyse the collected data, and it was found that mental ability was the most significant variable; this factor had the greatest effect on outcome

This study attempts to establish the factors on which the prognosis of an intracapsular fracture of the femoral neck depends, and to draw attention to certain causes of non-union and ischaemic necrosis. These factors are of two kinds: those inherent in the fracture, and those produced by the surgeon. The prognosis depends largely on the nature of the fracture. Original displacement and comminution are the factors which have most influence. Fractures of Type IV with severe comminution have mainly contributed to the bad reputation of intracapsular fractures. Accurate reduction and firm fixation are necessary if the best results for the type of fracture are to be expected. Accurate reduction does not mean merely accurate apposition of the fragments. Fixation of the fracture in certain rotational malpositions such as valgus of over 20 degrees and rotation round the long axis of the neck may occlude the only remaining source of blood supply, the vessels of the ligamentum teres. If these vessels remain open they may produce revascularisation in a femoral head deprived of its blood supply. The degree of valgus can easily be measured but it is impossible to detect rotation round the long axis of the neck. In this analysis only two methods of fixation were studied. It is clear that rigid fixation is of great significance, and a nail-plate, though it may not be the ideal method of fixation, is greatly superior to a Smith-Petersen nail introduced in the usual way. From the results of this survey there is no justification for continuing the use of this method except perhaps in Type II fractures. The greater the risk of non-union the more important is the fixation, and this is true of all fractures. This study also has a bearing on the indications for primary prosthetic replacement. If the nature of the fracture and the result of the reduction make it likely that replacement by a prosthesis is going to be the ultimate solution, and if the patient is over seventy years old, it is wiser to do it as a primary measure. Finally it was shown that condensation and collapse of the femoral head are not the only radiological signs of ischaemic necrosis. An earlier sign is flattening of the weight-bearing area, which appears on an average six and a half months after injury, as compared to condensation, which may not be apparent until eighteen months after injury

Four military recruits with complete distraction-type stress fractures of the femoral neck were treated conservatively. The radiographic diagnosis was made within two weeks of the onset of symptoms and the activities of the patients were matched to the clinical and radiographic progress of fracture healing. None of the fractures displaced and union occurred uneventfully. Our experience suggests that prophylactic internal fixation of these fractures is not necessary

It remains a matter of debate whether displaced fractures of the neck of the femur should be treated by internal fixation or arthroplasty. We have compared the two methods with regard to complications, mortality and functional outcome. We studied 409 patients, aged 70 years and over, with subcapital fractures graded as Garden 3 or 4, in a two-year prospective multicentre study from 12 Swedish hospitals. They were randomised to internal fixation or arthroplasty. Patients who were mentally confused, bedridden or in a nursing-home were excluded from the survey. After two years the rate of failure was 43% in the internal fixation (IF) and 6% in the arthroplasty group (p < 0.001). In the IF group 36% had impaired walking and 6% had severe pain compared with 25% and 1.5%, respectively, in the arthroplasty group (both p < 0.05). There was no difference in mortality. With a high rate of failure and poor functional outcome after IF, we recommend primary arthroplasty for displaced fractures of the neck of the femur in patients over 70 years of age

Of 92 children reviewed three to five years after treatment for fractured neck of femur (Lam 1976), we have been able to reassess 41, both clinically and radiographically, at 13 to 23 years after injury. The earlier clinical results had been excellent, despite a high incidence of complications; but the new, later review shows an 83% incidence of radiographic abnormality while 24% of the patients have pain, a limp or leg shortening. We present a recommended policy for management of this rare but potentially serious childhood injury

The successful management of femoral neck fractures is obviously based upon many factors. The forces acting upon the proximal end of the femur are believed to be mainly compressive in nature, and the low-angle nail by stabilising the fully reduced fracture in the line of these forces is held to allow weight bearing to take place. Low-angle nailing is believed to offer many advantages over conventional methods of treatment but only in the presence of stability. Stable reduction is the essential preliminary to any form of treatment, and low-angle fixation with early weight bearing in the absence of stability is regarded as futile. It is suggested that those subcapital separations which follow trivial injury may originate as stress fractures accompanying the process of bone remodelling in the aged, and that many of these fractures may remain unrecognised and heal spontaneously. With rare exceptions, subcapital fractures are regarded as being of the same essential pattern, and their varying radiological appearance is considered to be due to the different degrees of displacement to which they have been subjected. A new classification based on this premise has been suggested. In a series of eighty subcapital fractures the incidence of avascular necrosis was not adversely affected by early weight bearing, but reduction in the extreme valgus position was invariably followed by this disaster. This is probably also true of any malposition in extreme rotation which must stretch and obliterate the vessels in the ligamentum teres. A rough alignment index of reduction was found to provide an almost infallible guide to the prognosis both in regard to union and to avascular change. It may therefore be possible to base prognosis on the quality of reduction before the fixation appliance has been inserted. The unsatisfactory results in those cases apparently destined to non-union or avascular necrosis may then be avoided by alternative means of treatment at an early stage. Whether this will prove to be true must depend upon a much longer experience of low-angle fixation, and, in common with almost every communication on this subject, premature publication must largely offset the value of the present findings

Screw devices used to treat fractures of the femoral neck are usually positioned under image-intensifier control, using anteroposterior and lateral views. The volume projected by these views is over 27% larger than the femoral head; the tips of screws so placed may be outside the femoral head. This can be avoided by placement within the central two-thirds of the head: we have designed a template which can confirm safe placement

We have investigated the level of physical activity of 49 women between the ages of 15 and 45 years who sustained a fracture of the neck of the femur at between 60 and 70 years of age, and compared this with the level of activity reported by 49 control subjects without fracture, who were matched for age and social status. We found that the patients had been significantly less physically active than the controls, especially as regards household duties and professional working conditions

In 22 patients with femoral neck fractures 99mTc-MDP scintimetry was performed before operation and again shortly after operation; in 17 of these patients the investigation was repeated after four months. Six patients with increased uptake in the femoral head before operation and eight with decreased uptake had similar results at the first postoperative investigation. Of eight patients with an intermediate uptake before operation, two showed increased and six decreased femoral head uptake after operation. It is concluded that for the patients in the group with intermediate femoral head uptake before operation, the operative procedure probably influenced the postoperative blood supply of the femoral head

1. The development of sclerosis of the femoral head after fracture of the femoral neck has been investigated by a combined microradiographic and histological examination of twenty femoral heads removed during arthroplasty of the hip done at varying intervals after fracture. 2. Mineralisation of the bone did not differ from the normal. 3. There was a direct correlation between the density of the femoral head as judged radiologically and the width of the trabeculae. In cases of sclerosis of the femoral head the trabeculae were broader than normal and histological examination showed that this was caused by apposition of new bone upon the necrotic trabeculae. 4. Although sclerosis is a result of necrosis, it is at the same time a definite sign that revascularisation and restitution are going on

We measured the stability of fixation in femoral neck fractures treated with von Bahr screws, investigated the influence of impaction and correlated peroperative stability with the clinical results. Stability was measured at operation using a metal probe fitted with strain gauges. Its tip was anchored in the subchondral bone of the femoral head and its lateral end was fixed in the lateral femoral cortex. The shearing force produced by longitudinal compression applied to the foot of the operated leg was recorded. The results in 41 consecutive patients all followed for 30 months, showed that fractures with early loosening or nonunion had all had significantly poorer stability than the fractures that had healed. Impaction improved stability in only 23 out of the 41 fractures; in the others stability had deteriorated or was unchanged

The results of treatment in 242 patients with intracapsular fractures of the neck of femur treated with Garden screws are presented with reference as to whether the screws were crossed or parallel. The incidence both of nonunion and of avascular necrosis was less in those fractures treated with parallel screws. The outcome was also superior if the reduction was good

We studied 60 patients with an acute displaced fracture of the femoral neck and with a mean age of 84 years. They were randomly allocated to treatment by either internal fixation with cannulated screws or hemiarthroplasty using an uncemented Austin Moore prosthesis. All patients had severe cognitive impairment, but all were able to walk independently before the fracture. They were reviewed at four, 12 and 24 months after surgery. Outcome assessments included complications, revision surgery, the status of activities of daily living (ADL), hip function according to the Charnley score and the health-related quality of life (HRQOL) according to the Euroqol (EQ-5D) (proxy report). General complications and the rate of mortality at two years (42%) did not differ between the groups. The rate of hip complications was 30% in the internal fixation group and 23% in the hemiarthroplasty group; this was not significant. There was a trend towards an increased number of re-operated patients in the internal fixation group compared with the hemiarthroplasty group, 33% and 13%, respectively (p = 0.067), but the total number of surgical procedures which were required did not differ between the groups. Of the survivors at two years, 54% were totally dependent in ADL functions and 60% were bedridden or wheelchair-bound regardless of the surgical procedure. There was a trend towards decreased mobility in the hemiarthroplasty group (p = 0.066). All patients had a very low HRQOL even before the fracture. The EQ-5D. index. score was significantly worse in the hemiarthroplasty group compared with the internal fixation group at the final follow-up (p < 0.001). In our opinion, there is little to recommend hemiarthroplasty with an uncemented Austin Moore prosthesis compared with internal fixation, in patients with severe cognitive dysfunction

A retrospective study of 200 cases of subcapital fracture of the neck of the femur treated by sliding nail-plate fixation has been carried out. Failure of fixation within three months occurred in forty-two cases (21 per cent). These failures could, in part, be attributed to a combination of the severity of the fracture and various imperfections in technique. The age of the patient and the angle of the nail-plate had no significant effect on the result

1. Ten cases are reported of subcapital fractures of the femoral neck with low fracture-shaft angles treated by wedge osteotomy and fixation by nail-plate. 2. A simple method of osteotomy to increase the fracture-shaft angle is described. 3. In eight fresh fractures bony union was obtained when nailing was followed by immediate osteotomy. 4. The alteration of the bony anatomy does not prejudice further reconstructive surgery should it become necessary

1. Intra-osseous venographs have been obtained in twenty-eight hips affected by Perthes disease and in twenty normal hips after the injection of opaque medium into the femoral neck. 2. In the normal hips the contrast medium drained rapidly into the local veins; none flowed distally into the diaphysis. 3. In the initial and in the fragmentation stages of Perthes' disease some contrast medium always flowed into the diaphysis and the flow into the local veins was greatly reduced. 4. In the restitution stage the venographs approached normal. 5. The implications of these findings are discussed

Twenty-six patients with femoral neck fractures were treated by open reduction, cancellous screw fixation and free fibular grafting. The patients were between 14 and 50 years of age. There were 16 old and 10 fresh fractures. Four patients had radiological signs of avascular necrosis before the treatment was instituted. Bony union was achieved in all patients except one, where the failure occurred because of a technical error. The patients were followed up for at least two years. No new case of avascular necrosis was detected after treatment, and there was clinical and radiological improvement in all four patients with pre-operative avascular necrosis

1. A series of 100 intracapsular fractures of the femoral neck treated with the Charnley compression screw is reported. 2. There were six deaths, and in patients reviewed long enough (seventy-five) there were eleven undisplaced fractures, with successful union in 8l·8 per cent, and sixty-four displaced fractures, with a union rate of 59·6 per cent. 3. If we exclude six failures of operative technique, there remain fifty-eight patients in whom the fracture was judged radiologically to have united in 65·5 per cent. 4. The Charnley compression screw is an effective method of internal fixation in such fractures, and non-union with this method is usually due to causes other than mechanical failure

In a prospective randomised study, the Hansson pin technique for internal fixation of fractures of the femoral neck was compared with the Uppsala screw technique. The series consisted of 115 consecutive patients, 97 women and 18 men, with a mean age of 80 years. There were 56 patients treated with Hansson pins and 59 with Uppsala screws. After one year 22 patients had died, eight in the Hansson pin group and 14 in the Uppsala screw group (p = 0.28). Twenty-four complications had occurred, 18 in the Hansson pin group and six in the Uppsala screw group (p = 0.008). After exclusion of those with complications, the patients in the Hansson pin group had significantly more pain, less mobility, and a smaller proportion were living in their own homes