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At least 1,045 records · Page 58Linked to original sources
PubMed2004

Open Bankart repair versus arthroscopic repair with transglenoid sutures or bioabsorbable tacks for Recurrent Anterior instability of the shoulder: a meta-analysis.

BACKGROUND: In published comparative studies, it remains unknown if arthroscopic techniques for performing Bankart repair for anterior shoulder instability equal the success of open repair. HYPOTHESIS: The current literature supports a lower rate of recurrent instability after open Bankart repair compared to arthroscopic repair with bioabsorbable tacks or transglenoid sutures. STUDY DESIGN: Meta-analysis. METHODS: A Medline search identified all randomized controlled trials or cohort studies that directly compared open repair to arthroscopic techniques of Bankart repair for traumatic, unilateral, recurrent anterior instability. Data collected from each study included patient demographics, surgical technique, rehabilitation, outcome, and complications. RESULTS: Six studies met all inclusion criteria. There were 172 patients in the arthroscopic group (90 patients with transglenoid sutures, 77 patients with arthroscopic tacks, and 5 patients with suture anchors) and 156 patients in the open group. The groups were similar in demographic characteristics. When comparing the arthroscopic to the open group, there was a significantly higher rate of recurrent dislocation (12.6% vs 3.4%; P = .01) and total recurrence (recurrent dislocation or subluxation) (20.3% vs 10.3%; P = .01). In addition, there was a higher proportion of patients with an excellent or good postoperative Rowe score in the open group (88%) than in the arthroscopic group (71%) (P = .01). CONCLUSIONS: Arthroscopic Bankart repair using transglenoid sutures or bioabsorbable tacks results in a higher rate of recurrence of instability compared to open techniques. Studies comparing open repair to newer arthroscopic techniques using suture anchor fixation and capsular plication are necessary.

Absorbable Implants↗
PubMed2005

A modified capsular shift for atraumatic anterior-inferior shoulder instability.

PURPOSE: To evaluate the long-term outcome of a modified inferior capsular shift procedure in patients with atraumatic anterior-inferior shoulder instability by analyzing a consecutive series of patients who had undergone a modified inferior capsular shift for this specific type of shoulder instability. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Between 1992 and 1997, 38 shoulders of 35 patients with atraumatic anterior-inferior shoulder instability that were unresponsive to nonoperative management were operated on using a modified capsular shift procedure with longitudinal incision of the capsule medially and a bony fixation of the inferior flap to the glenoid and labrum in the 1 o'clock to 3 o'clock position. The patient study group consisted of 9 men and 26 women with a mean age of 25.4 years (range, 15-55 years) at the time of surgery. The mean follow-up was 7.4 years (range, 4.0-11.4 years); 1 patient was lost to follow-up directly after surgery. The study group was evaluated according to the Rowe score. RESULTS: After 7.4 years, 2 patients experienced a single redislocation or resubluxation, 1 patient had recurrent dislocations, and 1 patient had a positive apprehension sign, which is an overall redislocation rate of 10.5%. The average Rowe score increased to 90.6 (SD = 19.7) points from 36.2 (SD = 13.5) points before surgery. Seventy-two percent of the patients participating in sports returned to their preoperative level of competition. CONCLUSIONS: Results in this series demonstrate the efficacy and durability of a modified capsular shift procedure for the treatment of atraumatic anterior-inferior shoulder instability.

Adolescent↗
PubMed2006

Twenty-six-year results after Broström procedure for chronic lateral ankle instability.

BACKGROUND: The procedure described by Broström has been used to address chronic lateral ankle instability; the long-term results of this procedure have not been reported. HYPOTHESIS: The Broström procedure provides good results over the long term for active patients with chronic lateral ankle instability. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Thirty-one male patients (32 ankles) who underwent the Broström procedure for chronic lateral ankle instability while enrolled as students at the United States Naval Academy were identified. Each patient was mailed a questionnaire that included a functional outcome measure as described by Roos et al, a score described by Good et al, and a single-number ankle functional assessment. The mean age was 20.7 years (range, 18-23 years) at the time of operation. A functional outcome score was completed on each patient, with a mean follow-up of 26.3 years (range, 24.6-27.9 years). RESULTS: The follow-up included 22 of the 31 original patients. The mean numeric score for overall ankle function was 91.2 of 100 (standard deviation, 10.2). The foot and ankle outcome score (described by Roos et al) was 92.0 (92%; standard deviation, 12.8) averaged over 5 functional areas. Ninety-one percent of the patients described their ankle function as good or excellent using the scale devised by Good et al. CONCLUSION: The long-term results of the Broström procedure for chronic lateral ankle instability are excellent with 26-year follow-up.

Adolescent↗
PubMed2006

Medial patellofemoral ligament reconstruction in patients with lateral patellar instability and trochlear dysplasia.

BACKGROUND: Reconstruction of the medial patellofemoral ligament has been proven to restore stability in patients with lateral patellar instability. No study to date has examined the results in a patient population with the predisposing factor of femoral trochlear dysplasia. HYPOTHESIS: Reconstruction of the medial patellofemoral ligament restores stability and provides pain relief in patients who have lateral patellar instability in association with trochlear dysplasia. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Thirty-four patients with chronic patellar instability and trochlear dysplasia were treated with medial patellofemoral ligament reconstruction using an adductor tendon autograft, bone-quadriceps tendon autograft, or bone-patellar tendon allograft. All patients were evaluated preoperatively and postoperatively with Kujala, Lysholm, and Tegner scores at a minimum of 24 months. RESULTS: Thirty-four patients were followed for a mean of 66.5 months (range, 24-130 months) after surgery. Kujala scores improved from 53.3 to 90.7, Lysholm scores improved from 52.4 to 92.1, and Tegner activity scores improved from 3.1 to 5.1. All improvements were highly statistically significant (P < .001). No statistical difference was found between the postoperative Lysholm, Kujala, and Tegner scores and the degree of dysplasia, graft type, or degree of symptoms. There were 85.3% and 91.1% good and excellent results based on Kujala and Lysholm scores, respectively. No recurrent dislocations have occurred. CONCLUSION: Medial patellofemoral ligament reconstruction provides excellent long-term pain relief and functional return in patients with patellar instability and femoral trochlear dysplasia. In addition, reconstruction prevents recurrent dislocation, despite the diminished bony constraint of a dysplastic trochlea.

Adult↗
PubMedDate not supplied

Symptomatic shoulder instability due to lesions of the glenoid labrum.

Lesions of the glenoid labrum can be associated with and cause shoulder instability and symptomatology by (1) allowing the shoulder to dislocate recurrently (anatomical instability); (2) allowing the shoulder to subluxate (anatomical instability); and (3) allowing the shoulder to click, catch, and lock secondary to partially attached fragments becoming interposed between the articular surfaces (functional instability). The latter two clinical entities are usually associated with "lesser" labral damage and diagnosis can be difficult. Six illustrative cases are presented and salient diagnostic and therapeutic points are discussed. The glenohumeral axillary arthrotomogram is presented as a sensitive diagnostic test for detecting labral lesions.

Adolescent↗
PubMedDate not supplied

The Lenox Hill brace. An evaluation of effectiveness in treating knee instability.

Forty-five patients with documented ACL injuries were examined objectively and subjectively to evaluate the effectiveness of the Lenox Hill brace in treating knee instability. The brace failed to significantly reduce maximal anterior subluxation of the tibia, but did increase resistance to displacement. Rotatory instability was improved an average of one grade by the brace, while varus/valgus laxity was unchanged. Subjectively, patients experienced a significant reduction in episodes of giving way, and athletic performance was improved by the brace in 69% of patients. Increased symptoms of instability correlated positively with greater measured laxity and low resistance to tibial displacement. The brace, while not effective in controlling absolute laxity, significantly reduced symptoms of instability in the nonelite athlete, possibly through increasing relative resistance to subluxation. Overall, 91% of the patients examined were satisfied with the brace and felt it was beneficial for them.

Adult↗
PubMedDate not supplied

Shoulder function in patients with unoperated anterior shoulder instability.

A functional analysis, including Rowe score and measurements of isokinetic peak torque and range of motion of the shoulder, and a subjective assessment were performed in 26 consecutive patients (23 males and 3 females) with unoperated anterior shoulder instability. Patients experienced the initial dislocation at an average age of 23 +/- 8 years and 58% occurred during sports activity. No patient had gone through any controlled rehabilitation program. In this study, an average of 7 years (range, 1 to 28) had passed since the initial dislocation. Fifty-nine percent of the patients complained of markedly reduced ability to perform in sports because of instability, impaired strength, decreased range of motion, and pain induced by activity. The majority (65%) of the patients reported instability only during physical activity. The average Rowe score was 68 +/- 14 on a scale of 100. In comparison with the healthy side, the injured shoulder had a significantly lower isokinetic peak torque during abduction and internal rotation, as well as a reduced range of motion in extension, abduction, and external rotation, but not in flexion. The severity of impairment (Rowe score, deficit in range of motion, and peak torque) was not related to the number of dislocations sustained or to the duration of instability.

Adult↗
PubMedDate not supplied

Multidirectional shoulder instability. Clinical results of inferior capsular shift in an active-duty population.

We reviewed the results of a capsular shift procedure performed on 10 active-duty patients with an average of 28 months follow-up. Improvement in pain, function, and stability occurred postoperatively in nearly all patients. Loss of total elevation and external rotation were minimal and an average of three spinal segments of internal rotation were lost. Only one patient required further surgery for recurrent instability and all patients except two reported over-all improvement. Dominant shoulders made greater improvements in pain, stability, and functional capacity than nondominant shoulders. Patients with generalized ligamentous laxity had less pain and more posterior instability than those without laxity. A history of an acute traumatic event was predictive of greater improvement in pain and stability. A previous instability repair was indicative of the most postoperative instability and least functional improvement.

Adult↗
PubMedDate not supplied

Fluoroscopic evaluation for subtle shoulder instability.

Fifty patients with unilateral shoulder symptoms and a variety of diagnoses were evaluated with stress testing of both shoulders under general anesthesia using fluoroscopic documentation just before surgery. An axillary lateral view of the glenohumeral joint was taken in neutral rotation and 90 degrees of abduction; this was termed "neutral position." Anterior and posterior translational stresses were then applied and spot radiographs taken. Measurements were made and the translation was expressed as a percentage of displacement of the humeral head with respect to the glenoid. The asymptomatic side was used as a control. We determined that up to 14% anterior translation and up to 37% posterior translation is normal. Using these guidelines, attempts were made to confirm or predict the presence of stability or instability. Thirty-one patients were correctly identified as stable; 14 were correctly identified as unstable. Three patients with anterior shoulder pain were classified as unstable and found to have Bankart lesions at surgery. Overall, specificity was 100% and sensitivity was 93%. Using discriminant function analysis, a difference score of 10% between the symptomatic and control shoulder was generated. This was useful in eliminating interobserver variations in the examination for predicting stability or instability. We recommend this examination as a valuable adjunct to confirm the presence and direction of shoulder instability and predict subtle instability patterns in patients with recalcitrant undiagnosed shoulder pain.

Adolescent↗
PubMedDate not supplied

Magnetic resonance imaging of the glenoid labrum in anterior shoulder instability.

Detachment of the anterior inferior labrum and inferior glenohumeral ligament complex from the glenoid is a common lesion encountered in anterior shoulder instability while other types of labral lesions are associated with symptoms that mimic instability. Accurate delineation of labral lesion is, therefore, key in managing shoulder problems. In a prospective double-blinded fashion, we compared the magnetic resonance imaging findings with those noted at surgery in 33 patients with possible anterior shoulder instability. Of 28 surgically confirmed labral lesions, 21 were detected by imaging. Sensitivity was 75%, specificity 100%, while positive and negative predictive values were 100% and 41%, respectively. Overall accuracy was 79%. Based on a literature review and our clinical experience, we developed a classification of glenoid labra according to the type and severity of the lesions. Method of treatment correlated with clinical outcome, using this system, to a statistically significant level. Unfortunately, this system enabled accurate classification with magnetic resonance imaging in only 7 of 33 (21%) labra, with the precision necessary to affect surgical planning in our series. We conclude that magnetic resonance imaging is not useful in the surgical planning for most patients with obvious anterior shoulder instability.

Arthroscopy↗
PubMed2002

The relationship of the anterior drawer sign to the shape of the tibial plafond in chronic lateral instability of the ankle.

To determine what factors correlate with values for tested anterior drawer (AD) sign, we investigated stress radiographs in 71 patients with severe chronic lateral instability of the ankle as well as 320 normal controls. We found no correlation between AD and talar tilt (TT), but measurement of the anterior tip ratio (ATR) (ATR=tanA x 100) demonstrated a link of ATR with AD (r=0.74, p<0.001). The posterior tip ratio (PTR) (PTR=tanP x 100) was not correlated with AD (r=0.34, p=0.16). The ankle mortise angle (AMA) (the anterior opening of the lateral ankle mortise) was also not correlated with AD (r=0.27, p=0.23). Investigation of 320 normal ankles revealed a mean ATR of 9.1%+/-1.4%. The ATR in patients was 7.6%+/-1.7%, significantly lower than in the control patients. The values in female patients with chronic lateral instabilities were significantly less than the values in the females in the control group. But values for male patients were not different from the control group. Thus the anterior tip of the lateral tibial plafond, as it affects the ATR, may influence instability in anterior drawer function, especially in female patients with chronic lateral ligamentous instability of the ankle.

Adult↗
PubMed2002

Concurrent interdigital neuroma and MTP joint instability: long-term results of treatment.

INTRODUCTION: An interdigital neuroma is a common source of forefoot pain, and while second metatarsophalangeal joint instability is a less common entity, it can be a concomitant source of pain. The purpose of this study was to evaluate the long-term clinical course and surgical outcomes of the treatment of these concomitant problems. METHODS: 121 consecutive patients (131 feet and 136 neuromas) were evaluated and treated for a symptomatic interdigital neuroma from 1981 to 1997. Of these, 24 patients (20%) had a concurrent interdigital neuroma (IDN) and second metatarsophalangeal (MTP) capsular instability that underwent surgical treatment. At the final follow-up examination, 20 patients (21 feet) were evaluated by an independent orthopaedic surgeon with a standardized clinical and radiographic examination, patient self-assessment and outcome measures. RESULTS: Overall, there were 18 females and two males (21 feet) treated with an average age of 54 years at the time of surgery that returned for examination and follow-up at an average of 80 months (48 to 108 months) following surgery. Seventeen patients (85%) rated their result as good or excellent and three as fair. Six patients had mild continued symptoms referable to the second toe and none to the neuroma. Simultaneous neuroma excision and second MTP stabilization was performed in 15 cases and in six cases a staged repair was performed. The mean visual analog pain score was 1.4 (0=no pain, 10=severe pain) and mean MHAQ score was 1.13 (1-1.625) with activity modification stemming from hip, back and knee complaints. CONCLUSION: With careful patient selection and preoperative assessment, resection of an interdigital neuroma and stabilization of second metatarsophalangeal joint instability resulted in a high percentage of successful results at greater than four years following the procedure. Objective results were comparable to previous reports on the surgical treatment of isolated interdigital neuroma and crossover second toe reconstruction. Subjective patient satisfaction was high but both subjective and objective results were lower in patients with persistent symptoms of MTP instability.

Comorbidity↗
PubMed2002

Idiopathic cavovarus and lateral ankle instability: recognition and treatment implications relating to ankle arthritis.

Hindfoot malalignment and chronic lateral ankle instability may lead to degenerative ankle arthritis. We retrospectively analyzed 10 patients with 13 cavovarus feet. None of the patients had underlying neurologic disorders. All patients presented with a history consistent with chronic lateral ankle instability, clinically with cavovarus feet, and radiographically with varying degrees of varus talar tilt and ankle arthritis. Ankles with severe degenerative change were fused. The ankles with mild or moderate change underwent calcaneal osteotomy with lateral ligament reconstruction and/or dorsiflexion osteotomy of the first metatarsal. A quantitative radiographic Coleman block test was utilized to aid in the preoperative planning of the calcaneal and metatarsal osteotomies. All patients had correction of preoperative deformity and resolution of pain and instability. Recognition of the association between cavovarus and chronic ankle instability and degenerative ankle arthritis may be important in developing the appropriate treatment strategy in this patient population.

Adult↗
PubMed2005

An analysis of outcome measures following the Broström-Gould procedure for chronic lateral ankle instability.

BACKGROUND: The Broström-Gould procedure is a commonly recommended operative treatment for chronic ankle instability. Using standardized physician-based outcome scores, the results of this procedure have been uniformly excellent. Current scoring systems, however, do not adequately evaluate mechanical or functional instability. Therefore, outcome data may suggest greater success than is justified. METHODS: A retrospective review was done of 73 patients who had isolated Broström-Gould repairs of the lateral ankle ligaments. The mean time to followup was 64 months. Both the AOFAS ankle-hindfoot score and the Short Form 36 (SF-36) were used to evaluate outcome. RESULTS: The overall American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score was 95 of 100 points. Despite that, 17% of patients in the study had functional instability of the ankle that was not reflected in the AOFAS score. The mean physical component score of the SF-36 was 84% and reflected the presence of functional instability. Low correlations were found between the AOFAS ankle-hindfoot score and the SF-36 score. CONCLUSIONS: The current study identified a deficiency in the AOFAS score in evaluating functional ankle stability after the Broström-Gould procedure. A more meaningful analysis of outcomes can be expected using the SF-36 score. The data suggest that greater attention must be paid to functional rehabilitation after ankle stabilization surgery to obtain optimal outcome.

Adolescent↗
PubMed2006

Radiographic indicators of ankle instability: changes with plantarflexion.

BACKGROUND: The effect of plantarflexion on radiographic indicators of instability was investigated in matched pairs of stable ankles and unstable ankle fractures with complete deltoid ligament tears to test the hypothesis that differences exist in indicators as a function of either stability or position. The purpose of this study was to determine whether plantarflexion increases radiographic indicators of ankle fracture instability. METHODS: Measurements from 34 patients scheduled for operative treatment of unstable ankle fractures were collected prospectively from normal, stable ankles and the injured, unstable ankles. Instability was defined as a positive fluoroscopic stress examination under anesthesia. Stability and instability and neutral position and plantarflexion were associated with eight radiographic indicators of which five were distances in millimeters and three were binomial (either stable or unstable). RESULTS: Measurements were larger in the unstable ankles than in the normal stable ankles. Plantarflexion was associated with increased distances in stable ankles, and a trend was seen in unstable ankles. Plantarflexion was associated with increased binomial indicators in unstable ankles but not in stable ankles. DISCUSSION: Joint positioning affected measurement of ankle stability: plantarflexion increased the sensitivity of radiographic indicators.

Ankle Injuries↗
PubMedDate not supplied

Lateral ankle instability as a cause of superior peroneal retinacular laxity: an anatomic and biomechanical study of cadaveric feet.

The role of the competent superior peroneal retinaculum (SPR) as a primary restraint to peroneal tendon subluxation and mechanical attritional wear is clear. Injury to the SPR has classically been described as a dorsiflexion eversion movement of the ankle coupled with a forceful peroneal tendon reflex contraction. This mechanism, however, does not cause injury to the lateral collateral ligaments of the ankle and does not explain the coexistent findings of lateral ankle instability, laxity of the SPR, and concurrent peroneal tendon pathology. Anatomic studies reveal a parallel alignment of the calcaneal band of the SPR and the calcaneofibular ligament. A cadaveric model of ankle instability created by serial sectioning of the lateral collateral ligaments revealed increasing visual strain on the SPR with increasing degrees of ankle instability. These findings suggest the SPR serves as a secondary restraint to ankle inversion stress and that the force or forces that result in chronic ankle instability can also injure and attenuate the superior peroneal retinaculum.

Ankle Joint↗
PubMed1997

Treatment algorithm of chronic ankle and subtalar instability.

From 1981 to 1984, 131 reconstructive procedures and 113 Evans tenodesis procedures (1972-1984) were performed for patients with chronic instability of the ankle joint. From 1981 to 1985, 42 Christman/Snook procedures were performed for patients with isolated or combined subtalar instability. Reevaluation was conducted for 223 patients (102 reconstructive procedures, 87 Evans tenodesis procedures, and 34 Christman/Snook tenodesis procedures). The follow-up protocol comprised standard and stress radiograms, subjective patient evaluation, and objective functional data. No patient in either treatment group had clinically important ankle instability. Patients who had undergone the Evans tenodesis had a 3.3 degrees mean less talar tilt than did patients treated with reconstructive procedure. Of 87 patients who underwent Evans tenodesis, 33 had a mean supination deficit of 7.5 degrees. According to the +/- 100 points classification, 90% of the patients in both groups achieved good or excellent results. For subtalar instability, the Christman/Snook techniques resulted in a mean supination deficit of 7.2 degrees in 20 patients. Of 34 patients, 31 were rated good or excellent.

Algorithms↗
PubMed1999

Effect of anesthesia of the sinus tarsi on peroneal reaction time in patients with functional instability of the ankle.

We investigated peroneal reaction time (PRT) of 18 patients (21 ankles) with functional instability of the ankle and 8 healthy volunteer controls (9 ankles) before and after injecting local anesthetic into the sinus tarsi. The median PRT in patients before the injection was 82.0 ms, a significant delay from 71.0 ms in controls. After the injection, PRT in controls did not change, but PRT in patients significantly shortened to 69.3 ms. The sense of instability and the functional instability improved simultaneously. A disorder of the gamma-muscle-spindle system, induced by proprioceptive deficit after damage to a ligament, has been advocated as a cause of prolonged PRT. We suggest that irritability of mechanoreceptors or nociceptors or both, induced by inflammation at the sinus tarsi, may suppress the activities of gamma motor neurons of peroneal muscles, which in turn might cause the symptoms of functional instability and prolonged PRT.

Adult↗