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. 2011 Mar 15;2:19–24. doi: 10.2147/OAJSM.S17378

Surgical versus nonsurgical treatment in first traumatic anterior dislocation of the shoulder in athletes

Gustavo Gonçalves Arliani 1,✉, Diego da Costa Astur 1, Carina Cohen 1, Benno Ejnisman 1, Carlos Vicente Andreoli 1, Alberto De Castro Pochini 1, Moises Cohen 1
PMCID: PMC3781878  PMID: 24198566

Abstract

Anterior traumatic dislocation is a common problem faced by orthopedic surgeons. After the first episode of shoulder dislocation, a combination of lesions can lead to chronic instability. The management in treatment of young athletes after the first acute anterior shoulder dislocation is controversial. The available literature supports early surgical treatment for young male athletes engaged in highly demanding physical activities after the first episode of traumatic dislocation of the shoulder. This is because of the best functional results and lower recurrence rates obtained with this treatment in this population. However, further clinical trials of good quality comparing surgical versus nonsurgical treatment for well-defined lesions are needed, especially for categories of patients who have a lower risk of recurrence.

Keywords: athlete, conservative treatment, surgical treatment, immobilization, stabilization, primary treatment, shoulder dislocation

Introduction

The shoulder has the greatest joint range of motion of the human body. As a result, this articulation is particularly susceptible to dislocation and subluxation events. This is because stability has been sacrificed to achieve a wide range of motion.1

The functional stability of the glenohumeral joint is achieved through static and dynamic stabilizers.2,3

The static stabilizers include the negative intraarticular pressure, size, shape and orientation of the glenoid fossa, and the stabilizing presence of the capsulolabral complex. The dynamic stabilizers include the rotator cuff’s muscles and the long head of biceps tendon.2,3

Dislocations occur more frequently when the arm is forced in a position of abduction and maximal external rotation as a result of an anterior leverage of the humeral head to a position out of the joint.4–6

After the first episode of shoulder dislocation, a combination of lesions can lead to chronic instability, particularly injuries involving the inferior glenohumeral ligament, which is the most important passive stabilizer of the shoulder.3

Anterior traumatic dislocation is a common problem faced by orthopedic surgeons.7

This joint is the most common articulation involved in episodes of dislocation, showing a rate of 11.2/100,000 per year and an estimated prevalence of 2% in the general population.7–10

The main cause of primary shoulder dislocation is traumatic as almost 95% of the first episodes of dislocation are derived from a strong collision, landing on an outstretched arm, or by a sudden and violent motion of the shoulder.6

Rowe has identified a bimodal distribution, with peaks of shoulder dislocations in the second and sixth decades of life.6,11

As a result, young and old people have a comparable incidence of shoulder primary dislocation. However, the incidence of recurrent dislocation is highly dependent on age and occurs more often in the adolescent population.

Recurrent dislocation was reported in 66%–100% of people aged 20 years or less, 13%–63% of people aged between 20 and 40 years, and 0%–16% of people over 40 years.11–15

The high incidence of recurrent dislocation of the shoulder during adolescence can be explained in part by the profile of existing collagen presented in the capsule and other tissues of the shoulder in this population. The greatest amount of elastic collagen (type 3) in tendons and ligaments may help explain the greater propensity of younger patients to recurrent dislocation of the shoulder compared with older patients.6

The management in treatment of young athletes after the first acute anterior shoulder dislocation is controversial.16,17

Although these lesions have traditionally been treated conservatively with immobilization followed by a rehabilitation program, recurrent rates that reached 100% in skeletally immature patients and 96% in adolescents have been observed in some studies.1,16,17

Recently, randomized clinical trials showed lower rates of recurrent instability and better results in young patients treated with surgical stabilization.1,18–20

The aim of this article is to review the data published about the management of athletes after the first episode of traumatic anterior shoulder dislocation.

Nonsurgical treatment

Several methods of treatment, such as immobilization, activity restriction, and physical therapy rehabilitation, appear as options in the nonoperative treatment after the first traumatic anterior dislocation.6

Regarding the positioning of the upper limb during the immobilization period, studies in cadavers and in patients using magnetic resonance imaging and arthroscopy showed a closer relationship between the Bankart lesion and glenoid with the humerus positioned in adduction and external rotation.21–26

Itoi et al recently presented the results of a prospective trial, comparing immobilization of the shoulder in internal rotation versus 10° of external rotation for 3 weeks. The authors found that immobilization in external rotation significantly reduces the risk of recurrence compared with the conventional method of immobilization.27

Another prospective study, however, showed that immobilization in external rotation may not be as effective as previously reported in the prevention of recurrent dislocation of the shoulder.28

Although some studies advocate a conservative treatment with immobilization in external rotation, a study showed that this was not well tolerated by patients during the treatment period.29 Moreover, another study showed that immobilization of the upper limb with a brace in a position of external rotation is well accepted by most patients.30

Nonsurgical treatment with immobilization of the limb in external rotation is not well accepted by orthopedic surgeons too. In a recent study in the UK, 93% of respondents supported the immobilization in internal rotation in nonoperative treatment after first shoulder dislocation.31

A systematic review on the subject concluded that there is lack of evidence from randomized trials to inform choices of nonsurgical treatment after closed reduction of traumatic anterior dislocation of the shoulder. In this study, no statistically significant difference was observed between the postreduction immobilization with the arm in external or internal rotation when assessing the level of return to sports and the incidence of posttraumatic instability of the shoulder.32

The duration of immobilization after a traumatic dislocation of the shoulder is also controversial. Most authors concluded that this does not influence the recurrence rates.12,33–36 Hovelius et al, in a prospective study with 257 patients, found no differences in recurrence rates between treatment with early mobilization and immobilization of the shoulder by a period of 3–4 weeks.12 Other retrospective studies found no beneficial effect on results with immobilization for a period exceeding 6 weeks.13,37 A study with 116 patients reported an overall recurrence rate of 33%, with no difference in recurrence due to the immobilization period between 0 and 6 weeks.37 In the same study, 82% of athletes suffered a new episode of dislocation while only 30% of nonathletes of similar age had relapsed. Although the duration of immobilization did not influence the recurrence rate, significantly better results were reported by patients with 6–8 weeks of restricted activity compared to rest duration of <6 weeks.6

Other authors found that lack of restraint had a negative effect on the recurrence rate compared with a period of 3 weeks of immobilization.38 Likewise, Kiviluoto et al found a difference in the rate of redislocation, according to the length of treatment, with a period of 3 weeks of immobilization showing lower rates of recurrence compared with only 1 week of immobilization.39 Maeda et al noted that in rugby players, the period between the first and second episodes of dislocation was higher when the shoulder was immobilized for 4 weeks or more compared to another similar group immobilized for <3 weeks.40

There are few studies presenting the results of nonsurgical treatment based on physical therapy rehabilitation.6 In a prospective study with 20 male patients (age range 18–22 years), Aronen and Regan reported an unrestricted return to sports in 75% of cases with a rehabilitation program that emphasized strengthening of the adductor and internal rotator muscles of the shoulder.41 Another study with 104 patients reported a success rate of 83% with nonoperative treatment with a limited abduction 6-week exercise regimen.

These studies support the restriction of activity and rehabilitation in nonsurgical treatment after first traumatic anterior dislocation. However, scientific studies are needed to clarify the effectiveness of physiotherapy in treatment of this entity.6

Surgical treatment

The most recent and successful surgical procedure for unidirectional shoulder instability treatment has the aim to restore the anatomic position of the labrum and glenohumeral ligaments associated with little damage to other structures of the shoulder (Bankart repair).6

This surgical procedure can be performed through open stabilization or, more recently, by arthroscopy. The advent of arthroscopy and advance in equipment and techniques have made this technique the most commonly used procedure nowadays.7,42,43 This procedure has been described using a variety of fixation techniques, including transglenoid sutures, staples, and bioabsorbable anchors.7,44–47 The anchors have recently become the preferred method of fixation, as it allows a more anatomical positioning of the labrum around the glenoid rim through a secure grip.42,43 A recent study comparing transglenoid sutures and suture anchors concluded that suture anchors are better, leading to significantly lower rates of recurrence.48 One study showed that the type of suture used, absorbable or nonabsorbable, did not influence the functional outcome of arthroscopic treatment of traumatic anterior shoulder instability.49

Some authors recommend open stabilization instead of arthroscopic treatment for young, high-level athletes as a way to guarantee a low recurrence rate in those individuals subjected to high training loads.50–52

Although Bankart repair is the procedure that is often performed in the treatment of glenohumeral instability, a clinical trial, with a follow-up period of 2 years, which compared arthroscopic lavage and conventional nonsurgical treatment, showed that this surgical procedure reduced the risk of recurrence after the first episode of traumatic dislocation of the shoulder.53

Comparison between surgical and nonsurgical treatments

The management after the first traumatic anterior glenohumeral dislocation in athletes is controversial. According to several authors who advocate surgical treatment, most patients who sustain a traumatic anterior shoulder dislocation have an avulsion injury of the anterior labrum at surgery.20,54 And since the capsulolabral complex is the greater anterior passive stabilizer of the shoulder, the high recurrence rate observed with the use of nonoperative treatment could be attributed to a failure of the labrum to heal in an anatomic position. On the other hand, the arthroscopic repair can directly address these structures, as opposed to nonsurgical treatment.20

Proponents of surgical treatment after the first episode of dislocation also argue that the chances of recurrence are high and therefore surgery should be performed before its occurrence.10 Some authors, however, argue that surgical treatment is demanding, and recurrence and other complications, such as stiffness and pain after surgery, are still present.18,21,27,39 Besides these factors, a study showed that surgical treatment can restore the function and stability of the shoulder to near normal values; however, there is a significant impairment of quality of life and performance in sports activities during a period of 2 years after surgery, including decreased activity and muscle strength.55 Other authors argue that not all cases of recurrent dislocation of the shoulder will require surgery, since some patients are able to handle the problem without a significant reduction in their level and type of activities.

No studies have demonstrated that the surgery performed after a primary dislocation has better results than that performed after a recurrence. Epidemiological data indicate that applying a policy of primary surgery in these cases may lead to a significant number of unnecessary surgeries.14,15 In the study of West Point, 20% of surgeries after an initial traumatic dislocation, even among athletes, would be unnecessary, and an additional 14% of surgeries were unsuccessful.56,57

Younger patients and practitioners of high-impact sports are more prone to further episodes of dislocation after an initial event. However, only about 50% of these will require surgery. And when this is performed after the first acute dislocation, based on the presumption of future dislocations, unhappiness, and disability, cannot be justified.58 Thus, it would be helpful to use specific tools to predict the risk of recurrence after the first traumatic dislocation of the shoulder. With these tools, patients at high risk of redislocation could be identified and submitted to a primary surgery, thus reducing the risk of recurrence.

One study showed that the anterior apprehension test carried out between 6 and 9 weeks after dislocation is not an ultimate weapon to predict the risk of recurrence. However, it is an important tool to categorize patients as high or low risk for recurrence.57 Moreover, the presence of greater tuberosity fractures and fractures of the glenoid rim is considered as a good predictor of stability and function of the shoulder after a traumatic dislocation of the shoulder.59

Another important factor when choosing a treatment method is the fact that patients with anterior shoulder instability have a significantly higher prevalence of injury of the anterior inferior labrum and bone lesions compared with patients after the first episode of dislocation.60

In an attempt to determine the best treatment option after the first episode of traumatic dislocation of the shoulder, few randomized clinical trials were conducted.8,18,61 The results are shown in Table 1.

Table 1.

Randomized clinical trials’ results

n (gender) Age (years) Population Surgical approach % nonsurgical recurrence rate % surgical recurrence rate Follow up (months)
Bottoni 2002 24 (all male) 18–26 (average 22.4 y) All military personnel and their families Arthroscopic 75 11,1 16–56 (average 36 m)
Kirkley 2005 40 (35 M and 5 F) <30 (average 22.4 y) Patients of 2 ED university centres Arthroscopic 47 15,9 51–102 (average 79 m)
Jakobsen 2007 76 (62 M and 14 F) 15–39 (average 21.5 y) Patients of 13 ED hospitals Open 54 3 24
62 9 120
Open in a new tab

Abbreviations: M, male; F, female; ED, emergency department.

These studies showed better functional outcomes for patients undergoing surgical treatment and showed no difference in shoulder’s range of motion between the two groups of patients.

A systematic review concluded that there is limited available evidence supporting primary surgery for young adults and athletes, usually male, engaged in highly demanding physical activities after the first traumatic dislocation. However, there is no evidence available to determine whether nonsurgical treatment should not remain the main treatment option for other categories of patients. Therefore, further clinical trials of good quality comparing surgical versus nonsurgical treatment for well-defined lesions are needed, especially for categories of patients who have a lower risk of recurrence.19

Discussion

Since available data comparing the options of surgical and nonsurgical treatment are limited, the need for more studies of quality is evident, especially studies comparing surgical versus nonoperative treatment for injuries involving the well-defined categories of patients who have a lower risk of recurrence.

The available literature supports early surgical treatment for young male athletes engaged in highly demanding physical activities after the first episode of traumatic dislocation of the shoulder. This is because of the best functional results and lower recurrence rates obtained with this treatment in this population. However, we believe that the patient’s sport, physical examination, age, gender, the period of the season in which the injury occurred, extent of shoulder structure injury, and the expectations of the athlete in relation to surgery are important factors in choosing a specific method of treatment and should be discussed with the patient.

Footnotes

Disclosure

The authors report no conflicts of interest in this work.

References

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