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PubMed2000

Proximal interphalangeal joint fracture dislocations.

Proximal interphalangeal joint fracture dislocations are complex, potentially disabling injuries for any patient, especially the competitive athlete. Dorsal fracture dislocations are fairly common and volar fracture dislocations are rare. Stable injuries often heal with minimal functional deficit, whereas unstable injuries can result in limitation in range of motion, joint incongruity, and degenerative joint disease. A number of surgical procedures have been described to treat the unstable dorsal fracture dislocation, including ORIF, extension block pinning, external fixation, dynamic traction, and volar plate arthroplasty. Volar fracture dislocations are usually amenable to closed or open reduction and internal fixation. The results of treatment of both volar and dorsal fracture dislocations can be unpredictable.

Athletic Injuries↗
PubMedDate not supplied

Dislocation of the proximal femoral epiphysis in acetabular fractures.

Acetabular fractures are often associated with dislocation of the proximal femoral epiphysis. The dislocation may be of three types, based on the type of fracture to which it is associated: anterior, central, posterior. In anterior and in central dislocation epiphyseal necrosis of the proximal femur has never been observed, while in posterior dislocation necrosis has been observed in 23% of cases. Diagnosis of posterior dislocation is of essential importance so that it may be reduced immediately, decreasing the risk of necrosis. The authors report a review of 192 fractures of the acetabulum to which dislocation of the femoral epiphysis was associated, treated between 1980 and 1996 at the IIIrd Division of the Rizzoli Orthopaedic Institute.

Acetabulum↗
PubMed2001

The often overlooked posterior dislocation of the shoulder.

Unlike most shoulder dislocations, the posterior dislocation is truly a diagnostic challenge to the treating physician because it may be missed more often than it is recognized. In fact, more than 60% of posterior dislocations are misdiagnosed initially by the treating orthopedic surgeon, and the correct diagnosis is often delayed for months or years. A history of seizures, electroshock, or a fall onto a flexed, adducted arm should alert the physician to the possibility of posterior dislocation. A careful physical examination with comparison to the unaffected arm must be performed with particular attention given to subtle posterior fullness and anterior flatness of the shoulder, along with a lack of external rotation and abduction. A radiographic trauma series made in the scapular plane must always be obtained in cases of shoulder trauma to rule out posterior dislocation. A computed tomographic scan may also be necessary. The correct diagnosis of this injury will facilitate proper orthopedic evaluation and treatment and will reduce the incidence of missed posterior shoulder dislocation and its associated morbidity.

Casts, Surgical↗
PubMed2002

Dislocation following revision total hip arthroplasty.

Dislocation is a relatively common complication following revision total hip arthroplasty. Risk factors include surgical approach, gender, underlying diagnosis, comorbidities, surgical experience, and previous surgery; for later dislocations, risk factors include wear/deformation of polyethylene, trauma, and decreased muscle strength. Prevention and precaution are the watchwords for dislocations following revision total hip arthroplasty. For dislocations that do occur, treatment rests first on identifying the source of instability. Most dislocations can be managed by closed reduction. Constrained components may increase success rates, but only for appropriate indications. Prevention and treatment of dislocations following revision total hip arthroplasty are discussed in this article.

Casts, Surgical↗
PubMedDate not supplied

Untreated hip dislocation in cerebral palsy.

The purpose of this study was to evaluate the problems associated with hip dislocation in adults with cerebral palsy. Twenty-nine subjects with dislocated hips and no prior hip surgery were identified. There were a total of 38 dislocated hips. Age range was 21 to 52 years (average 34). Seven dislocated hips (18%) were definitely painful and four hips (11%) produced only mild or intermittent pain. Twenty-seven hips (71%) were not painful. The seven painful hips underwent proximal femoral resection, resulting in excellent range of motion and no pain. In conclusion, for established nonpainful hip dislocation in the severely involved spastic quadriplegic patient, aggressive surgical treatment should be undertaken only after careful consideration of the natural history. If a dislocated hip becomes painful in adulthood or develops an adduction contracture interfering with perineal care, a proximal femoral resection can be performed with reliably good success.

Adult↗
PubMedDate not supplied

Sternal segment dislocation in children.

Three cases of sternal segment dislocation in children are described. The primary mechanisms were direct blow in a 4-year-old boy, indirect forces in a 3-year-old boy, and osteomyelitis in a 10-year-old boy. The two former cases were dislocated at the junction of the manubrium with the sternal body, and the latter case was at the junction of the first and second sternal segments. The dislocated segments were gradually rotated for approximately 2 weeks and were finally stabilized after rotation. While in the dislocated state, the patients were observed conservatively, although all the dislocated segments were remodeled. Surgical treatment of sternal segment dislocation is not inevitable.

Bone Remodeling↗
PubMed2002

[Utility of spiral computed tomography in the study of dislocation of cricoarytenoid joint].

OBJECTIVE: To demonstrate the cricoarytenoid relationship presented with spiral computed tomography and to show that the reconstraction of arytenoid dislocation can be presented by using multiplanar reconstruction algorithms. METHODS: Fifteen patients with arytenoid dislocation documented by fiberoptic laryngoscopy and strobovideolaryngoscopy and 10 normal person were displayed with spiral CT. A making design of our own has been used to diagnose arytenoid dislocation on axial CT image. RESULTS: Dislocation of cricoarytenoid joint were consistently demonstrated on several of the overlapping thin axial reconstructions in each of the 15 patients, in whom asymmetry of the bilateral cricoarytenoid joints was noted on axial images. Especially, by means of ordinary protractor, it has been found on the glottic-fissure level that the basal angle of abnormal side in 8 patients is larger than the one of normal side, and smaller in 7 patients, the value-difference of two basal angles ranges from 5 to 45 in 15 patients, 13 of whom ranges from 10 to 30. Whereas right basal angle is equal to left one in 8 except 2 whose value-difference of two basal angles is very small, respectively 2 and 3, in 10 normal person. High-quality sagittal and coronal reconstructive images often were helpful in confirming or clarifying the complex arytenoid orientations. CONCLUSION: The findings that two-side basal angle is not equal in triangle of glottic fissure can be used as a parameter to arytenoid dislocation. Spiral CT is a useful adjunct in diagnosing and treating dislocation of cricoarytenoid joint.

Adult↗
PubMed2003

[Tripolar arthroplasty for recurrent total hip prosthesis dislocation].

PURPOSE OF THE STUDY: The purpose of this study was to assess the results of revision surgery for recurrent total hip prosthesis dislocation using a tripolar prosthesis composed of a conventional stem with a mobile head of an intermediary prosthesis measuring more than 40 mm and a modified cup. This technique was used in two centers in Rouen France and Los Angeles USA. MATERIAL AND METHODS: Twenty-one hips in 21 patients were operated on. The mobile heads measured 40 to 47 mm. Mean patient age was 70 years (range 29-92). The indication for the tripolar prosthesis was reserved for extremely unstable hips in patients with major risk factors for recurrent dislocation. These 21 patients had experienced 95 dislocations. The acetabular cup was custom-made for the large-diameter heads. A cemented polyethylene cup was used in 14 cases and a press-fit metal-backed around a polyethylene insert in 7. The polyethylene thickness varied from 6.5 to 16 mm for the cemented cups and 4 to 5 mm for the press-fit cups. Fourteen femoral stems were left in place as were two press-fit cups where only the inserts were changed. Mean follow-up was 5.4 years (range 3-11.8). RESULTS: There has been no recurrent dislocation for 20 hips. One patient experienced a dislocation one week after surgery which required a second revision procedure to reposition the acetabular implant. Final outcome was good at 7.6 years for this hip. One patient who had not had any recurrent dislocation died 4 years after the revision surgery due to a cause unrelated to the prosthesis. Two patients were lost to follow-up at 3.7 and 6 years, both were pain free and had no radiological anomalies. Infection occurred in one patient undergoing chemotherapy for a myeloma; the head and neck had to be resected. For the 20 other patients, functional outcome, assessed with the UCLA score, showed improvement in pain (5.8 preoperatively, 9.2 at last follow-up), walking (4.8 and 8 respectively), function (4 and 6 respectively), and daily activities (3.3 and 5.2 respectively). A revision procedure was necessary for one patient during the 4(th) year because of a fracture of the polyethylene insert on a metal-back cup; the insert alone was changed. Excepting the patient with infection, there were no cases of certain or probable loosening during the follow-up. DISCUSSION: The tripolar prosthesis with a mobile cup and a large-diameter head appears to be a reliable solution for these severely unstable hips. The procedure can often be limited to the acetabular component, reducing morbidity. The thickness of the polyethylene cup is a limitation which may affect long-term survival. Search for a highly wear-resistant couple continues.

Adult↗
PubMed2003

[Surgical treatment of elbow fracture-dislocations seen in children and adolescents].

OBJECTIVES: We evaluated surgical indications and radiologic features of elbow fracture-dislocations in children and adolescents. METHODS: Thirteen patients (12 boys, 1 girl; mean age 13 years; range 6 to 17 years) with elbow fracture-dislocations were treated surgically. Coexisting fractures included medial epicondyle fractures (n=5), medial and lateral epicondyle fractures (n=3), radial head and olecranon fractures (n=2), radial head and medial epicondyle fractures (n=1), lateral condyle fracture (n=1), and fracture of the coronoid process (n=1). Eleven dislocations were closed, two were open. Open reduction and Kirschner wire fixation were performed in all the patients. Posterior (n=6), medial (n=5), anteromedial, and lateral incisions were used. Active range of motion exercises were initiated following the removal of sutures. Above-elbow cast was applied for three weeks. The mean follow-up period was 38 months (range 7 to 58 months). The results were evaluated with the use of the Mayo elbow performance score. RESULTS: Ten patients had satisfactory (very good or good) results, while two patients with open dislocations and ipsilateral major injuries, and one patient who developed myositis ossificans postoperatively had unsatisfactory (moderate or bad) results. No postoperative nerve injuries were detected. CONCLUSION: The surgical indications for fracture-dislocations of the elbow in children and adolescents are the presence of intraarticular loose bodies or instability after reduction. The presence of open dislocation or ipsilateral major injuries are associated with unsatisfactory results.

Adolescent↗
PubMed1992

Locked patellar dislocation with vertical axis rotation. A case report.

Whereas traumatic lateral dislocation of the patella is a well-described clinical entity, other types of patellar dislocations, specifically those that involve patellar rotation, are unusual. These rare types also present a therapeutic problem in which reduction often requires a general anesthetic and, possibly, an open procedure. A 16-year-old boy sustained a laterally directed blow to his knee, resulting in dislocation of the patella. The patella had rotated 90 degrees in the vertical plane and became wedged against the lateral femoral condyle. Initial attempts at closed reduction in the emergency room and under general anesthesia in the operating room were unsuccessful, and the patient required open reduction. A similar type of dislocation has been described; however, the patella is usually intercondylar. The tear along the medial side was extensive enough to allow the patella to dislocate lateral to the lateral femoral condyle, making this a unique case. In these instances of rare patellar dislocation, the surgeon should be prepared to perform an open reduction, because attempts at closed reduction even with a general anesthetic may be unsuccessful.

Adolescent↗
PubMed1992

Elbow subluxation and dislocation. A spectrum of instability.

After sequential releases of the ligaments and capsules of 13 fresh autopsy specimen elbows, external rotation and valgus moments with axial forces resulted in posterior dislocations in 12 of the 13 with the anterior medical collateral ligament (AMCL) intact. Kinematic displacements measured with a three-dimensional electromagnetic tracking device showed that dislocation involved posterolateral rotation of 34 degrees-50 degrees and 5 degrees-23 degrees valgus at about 80 degrees flexion. Dislocation is the final of three sequential stages of elbow instability resulting from posterolateral rotation, with soft-tissue disruption progressing from lateral to medial. In each stage, the pathoanatomy correlated with the pattern and degree of instability. Testing for valgus stability of the elbow during simulated active flexion revealed no significant increase (-0.3 degrees-2.4 degrees) in valgus laxity after reduction compared with the intact specimens (p greater than 0.05, beta = 0.1, delta = 2.5 degrees). In no case did the digitized AMCL origin-to-insertion distance increase beyond normal during the dislocation (p less than 0.01). The mechanism of dislocation during a fall on the outstretched hand would involve the body "rotating internally" on the elbow, which experiences an external rotation/valgus moment as it flexes. Posterior dislocations should therefore be reduced in supination. If valgus stability in pronation is demonstrated, the AMCL can be assumed to be intact, and rehabilitation in a hinged cast-brace with the elbow in full pronation can be commenced immediately.

Autopsy↗
PubMedDate not supplied

Injury of the axillary nerve subsequent to recurrence of shoulder dislocation. Clinical and electromyographic study.

Injuries of the axillary nerve subsequent to recurrence of glenohumeral dislocation have received only minimal attention. It is the purpose of this study to define the prevalence and the progression in time of injury of the axillary nerve in patients with recurrence of anterior shoulder dislocation. For two years we observed a total of 185 patients who had had primary shoulder dislocation. Excluded from the study were patients who had fractures associated with metabolic disorders that favored neurologic deficit. During the period of study, 98 patients contacted us again after recurrence of the dislocation: there were 89 patients aged over 60 years and 9 aged below 60 years. All of the patients were evaluated clinically and submitted to EMG in order to verify the condition of the axillary nerve. Four patients (4%) had neuroapraxia of the axillary nerve. One of these also had neuroapraxia of the radial nerve. Of the four patients, one was a male aged 34 years; the others were all aged over 60 years. In all of the cases, function of the axillary nerve completely recovered after a mean period of 4 months (3-5.3 months) after recurrence. Injury of the axillary nerve can occur at the time of the first recurrence of the injury. However, prevalence is significantly lower than that observed after primary dislocation. The occurrence of this injury should be taken into consideration, particularly in elderly patients, in order to avoid erroneous clinical diagnosis and massive rupture of the cuff subsequent to recurrence of the dislocation.

Adolescent↗
PubMed2006

[Does coexistant fractures impair the results of treatment of elbow dislocations in children?].

We present 33 children with 34 elbow dislocations. In 22 cases concomittant fractures around the elbowe were noted: 13 displaced medial epicondyle fractures, 5 radial neck fractures, 2 radial head fractures, 2 coronoid process fractures, 1 olecranon fracture, 1 lateral condyle fracture, 1 medial condyle fracture. In 5 children more than one concomittant fracture were noted. The mean age during dislocation was 11 years (from 4 to 15), the mean follow up period was 3.5 years (from 2 to 5). On follow up a clinical examination of the elbow was performed including axis assesment and elbow ROM. X-ray were taken in all children in AP and lateral view. All children had a satisfying function of the extremity and no pain was noted. No difference in ROM was noted in children with isolated elbow dislocation or with concomittant medial epicondyle fractures however in 3 of those children a persistent flexion contracture was observed. Among children with other fractures poorer results occured in 3 patients, specially after displaced radial neck fractures. In one of them there was slight supination and pronation restriction, in second a complete ankylosis of proximal radioulnar joint occured in neutral forearm position. In one child after elbow dislocation and medial condyle fracture a late radial dislocation occured. We think that concomitant medial epicondyle fracture does not impare good results of elbow dislocation treatment if well recognised and treated. Other fractures, specially radial neck fractures, increase the risk of complications.

Adolescent↗
PubMed1991

Dislocations following arthroplasties of the hip. Incidence, prevention, and treatment.

Three methods of avoiding postoperative prosthetic dislocation following total or bipolar hip arthroplasty are described; each approach is recommended for a specific population. The anterior surgical approach was utilized for bipolar hip endoprosthetic arthroplasty in 62 minimal or bed-to-chair ambulators with established flexion contractures about the hip. Two of these patients subsequently experienced a prosthetic dislocation, one of which was secondary to infection. An additional 98 patients who underwent arthroplasty using the posterior approach wore a knee immobilizer postoperatively, without incidence of prosthetic dislocation. A modification of Wilke boot casting was utilized for four patients following reduction of a dislocated hip prosthesis. The cast consisted of a short cylinder cast on the affected extremity connected by a cross bar to a short leg cast on the contralateral leg. The casts controlled rotation, were well tolerated, and resulted in no redislocations. We therefore recommend the anterior approach in minimal ambulatory patients who are to undergo total bipolar hip arthroplasty. When the posterior approach is used in hip replacement procedures, we have found that postoperative use of a knee immobilizer helps prevent dislocation. Following reduction of a dislocated hip prosthesis, a modification of the Wilke boot cast that does not immobilize the affected ankle can be used.

Aged↗
PubMed1990

[Treatment of the dislocated hip in older children].

Between 1976 and 1987, 85 cases of CDH occurring after walking age were followed in the department. Eighteen children aged 5 years or older were reviewed. In 11 children the dislocation was unilateral and in 7 bilateral; out of these 25 hips, 20 were high luxations and 5 occurred at a lower level. Two children, 6 and 13 years old, had a bilateral dislocation. Except for 2 children of 5 years of age who were treated conservatively, surgical treatment was indicated in the other 18 cases usually after tenotomy and derotation. In 13 hips, a surgical repositioning was performed, associated with femoral osteotomies, either shortening osteotomies (7) or derotation osteotomies (3). Pelvic osteotomies were indicated either immediately or later in 15 hips. A triple osteotomy was usually performed (11); a Salter (2) or a Chiari (2) has been rarely used. After a follow-up of 5 years, evaluation according to clinical and radiological criteria showed 14 good and 7 bad results. The latter 7 cases had either a dislocation or an eccentration. Reviewing these series, the authors describe the problems in the treatment of the dislocated hip in the older child: the indications, the therapeutic strategy for those dislocations and the decision for treatment of the bilateral high dislocation in the older child.

Age Factors↗
PubMed1989

Coracoid process transfer for acromioclavicular dislocations. A report of 20 cases.

Twenty patients with acromioclavicular dislocations treated by transfer of the coracoid process to the clavicle were reviewed and were compared to a previous study. Surgery was performed for acute dislocations in seven cases and for chronic dislocations in 13 cases. At the follow-up examination (5.6 +/- 3.5 years for acute and 4.0 +/- 3.6 years for chronic dislocations), all patients had some relief of their symptoms. Nine patients had residual aching in the joint, and this was associated with an older age at injury (40 years as opposed to 25 years for chronic dislocations). Complications included superficial wound infections in two patients, transient stiffness of the shoulder in two patients, loss of range of movement in one patient, and subjective weakness in one patient. In general, satisfactory results were achieved in younger patients, but as the results of conservative treatment of these injuries are comparable, the operation is indicated only in patients with symptomatic chronic acromioclavicular dislocations.

Acromioclavicular Joint↗
PubMed1989

[Fractures and dislocations of the talus].

Some of the peculiarities of the anatomy of the talus are of special interest: the lack of muscle insertions, the vulnerability of the blood supply, and the fact that about 60% of the surface is covered by hyaline cartilage. This implies that most of the fractures are intra-articular. In 1983, the results of 262 talus fractures were published. Kuner and Lindenmaier found post-traumatic arthritis in about 50% of the cases. A subdivision of peripheral and central fractures is useful; complications like avascular necrosis are found in about 18% of fracture cases of the central talus. Magnetic resonance imaging may be helpful in the early diagnosis of talus necrosis. Hawkins' sign in an anteroposterior roentgenogram after 6 or 8 weeks of fracture dislocation and non-weight-bearing shows that subchondral atrophy is present in the dome of the talus. This excludes the diagnosis of avascular necrosis. Absence of subchondral atrophy in the early months and then later density of the dead bone and atrophy of the surrounding bones imply avascular necrosis. Dislocations around the talus without fractures are classified into three types: talocrural dislocation (i.e., luxatio pedis cum talo), subtalar dislocation (i.e., luxatio pedis sub talo), and the extremely unusual total dislocation of the talar body. The dislocations should be reduced promptly to avoid breakdown of the skin and distal circulatory compromise.

Fracture Fixation, Internal↗
PubMed1987

[Dislocation of the patella--causality in legal accident insurance].

Fifty-two expertises on connections between cause and effect of patellar dislocations were examined with a view to improving the standards of medical expertizing. On principle, the mechanism of injury is the decisive criterion in determining whether the injury can be considered capable of causing the dislocation. It was found that in about one-half of the cases the dislocation was wrongly attributed to the event and that a reasonable connection existed in only one-quarter of the cases. The typical causes of error in reasoning - first dislocation, impressive pattern of injury, no degenerative changes - are listed and discussed. The importance of the pattern of damage for the first occurrence of a dislocation is demonstrated. The suitability of different courses of events for contributing essentially to the dislocation is discussed.

Adolescent↗