Evaluation of the clinical-functional results from repairing extensive rotator cuff injury with inclusion of the tendon of the long head of the biceps

Abstracts

OBJECTIVES:

To assess the outcomes of the arthroscopic margin convergence of the posterior cuff to the biceps tendon.

METHODS:

From October 2003 to December 2007, 20 patients with massive rotator cuff tear which include the rotator interval were treated with arthroscopic margin convergence of the posterior cuff to biceps tendon. Sixteen patients were female and four were male. The mean age was 58.95 years old. The dominant side was affected in 16 cases (80%). The outcomes were analysed according to the UCLA Score with a minimum follow-up period of two years.

RESULTS:

The UCLA score improved, on average, 14 points (p < 0.001). Six patients had excellent results; nine good; three fair and two poor results. The mean improvement of forward flexion was 33º (p < 0.001), 3º of external rotation (p < 0.396) and two vertebral levels for internal rotation (p < 0.025).

CONCLUSION:

The arthroscopic margin convergence of the posterior cuff to the biceps tendon leads to satisfactory results.

Rotator cuff; Arthroscopy/methods; Evaluation studies

OBJETIVOS:

Avaliar os resultados clínico-funcionais dos pacientes com lesão extensa do manguito rotador submetidos ao reparo artroscópico pela técnica de convergência de margens da parte posterior do manguito rotador com o tendão da cabeça longa do músculo bíceps braquial.

MÉTODOS:

Vinte casos de lesões extensas do manguito rotador, que tinham lesão do tendão supraespinal retraído e deficiência do intervalo rotador, foram operados em nosso serviço com essa técnica. Dezesseis casos eram do sexo feminino (80%) e quatro do sexo masculino (20%); média da idade de 58,95 anos (42 a 75 anos). Em 16 casos a lesão havia ocorrido no membro dominante (80%). Em todos os pacientes o movimento de elevação, rotação medial e lateral, assim como a pontuação pela escala da UCLA, foram documentados no período pré-operatório. Todos foram reavaliados com o mínimo de dois anos de acompanhamento, sendo estudadas a pontuação da escala funcional da UCLA e a mobilidade.

RESULTADOS:

A pontuação da escala funcional da UCLA no período pós-operatório foi em média de 28,95 pontos, com acréscimo de 13,9 pontos, uma melhoria estatisticamente significativa (p < 0,001). Seis casos foram classificados como excelentes, nove bons, três regulares e dois ruins. Houve uma melhoria do arco de movimento com aumento médio da elevação de 117,62 para 151,19 (p < 0,001), rotação lateral de 47,38 para 50,48 (p < 0,396) e rotação medial de L2 para T12 (p < 0,025).

CONCLUSÃO:

Neste estudo a técnica cirúrgica apresentada levou a uma melhoria da função e mobilidade do ombro com valores estatisticamente significantes.

Manguito rotador; Artroscopia/métodos; Estudos de avaliação

Introduction

The term "extensive rotator cuff injury" has been widely used to identify lesions that are particularly difficult to repair and are thus correlated with an uncertain prognosis.^{1 , 2} Cofield³defined these injuries as complete tendon ruptures greater than or equal to 5 cm of its diameter, while Zumstein et al.⁴defined extensive lesions as those that were complete and compromised two or more tendons that made up the rotator cuff.

Repairing chronic extensive rotator cuff tears is a challenge even for the most experienced shoulder surgeons.These tears are generally associated with atrophy of the musculature of the rotator cuff, with retraction and loss of mobility of the tendon, which greatly increases the difficulty in repairing it.^{2 , 5}

Better knowledge of the injury patterns and advances in the quality and design of materials, along with improvements in surgical techniques, have made it possible to repair extensive tears by means of arthroscopy.^{6 10} In the case of extensive tears of U-shaped pattern, with retraction of the supraspinatus tendon, without mobility and with deficiency of the rotator interval, a procedure to converge the margins of the posterior portion of the rotator cuff using the tendon of the long head of the biceps brachii muscle may be a good repair option.⁸

This study, conducted by the Shoulder and Elbow Group of the ABC Medical School (Faculdade de Medicina do ABC), had the aim of presenting the results obtained through this surgical technique, in treating extensive rotator cuff injuries.

Materials and methods

Between October 2003 and December 2007, 53 patients with extensive rotator cuff tears underwent arthroscopic surgical treatment performed by our group.

For inclusion in this study, patients in whom the supraspinatus tendon had retracted and lacked mobility, and in whom the rotator interval was deficient, were selected. The repair was performed using the margin convergence technique, with suturing of the posterior portion of the rotator cuff using the tendon of the long head of the biceps brachii muscle. Patients were excluded if they failed to respond to the request to come for a reassessment or if they had not yet completed 24 months of postoperative follow-up. Thus, 20 patients were evaluated: 16 women (80%) and four men (20%), of mean age 58.95 years (range: 42 to 75 years); 18 patients were right-handed and two were left-handed, and the lesion had occurred in the dominant limb in 16 patients (80%).

The preoperative joint mobility was assessed by means of the parameters described by Hawkins and Bokos.¹¹ The maximum elevation ranged from 60º to 160º, with a mean of 117.62º; the lateral rotation was from 20 to 80º, with a mean of 47.38º; and the medial rotation, which was evaluated according to the vertebral level that the patient was able to reach with the thumb, ranged from the ipsilateral greater trochanter to T7, with a mean of L2.

All the patients were evaluated using the UCLA score¹²before the surgery, and the mean score was found to be 15.05 (range: 10-24). Magnetic resonance imaging was also performed preoperatively, and this showed fatty muscle degeneration of the supra and infraspinatus muscles, as assessed using Goutalier's classification,⁵ with means of 2.9 and 2.4, respectively.

After the operation, the patients were reassessed clinically using the UCLA score¹² and their joint mobility was reassessed by means of the parameters described by Hawkins and Bokos.¹¹

The statistical analysis was performed using the SPSS software (Statistical Package for the Social Sciences), version 17.0. The Wilcoxon signed rank test was used to investigate possible differences between the pre and postoperative UCLA scores and in relation to joint mobility. Spearman's correlation analysis was used to ascertain the degree of correlation between the variables of interest (postoperative UCLA score, fatty degeneration of the supra and infraspinatus muscles before the operation, and re-rupture). We used the significance level of 5% (0.05) for applying the statistical tests.

Surgical technique

The patients underwent the surgical procedure in the "deckchair" position, under general anesthesia associated with brachial plexus block. The arthroscopic procedure began with an inspection of the joint using an optical device introduced through the posterior portal. The stability of the tendon of the long head of the biceps brachii muscle was tested by evaluating the competence of the medial pulley. In cases in which the upper portion of the subscapular tendon was torn, the lesser tubercle was repaired using an anchor and suture stitches, done by means of articular viewing. Going into the subacromial space, the rotator cuff was repaired by advancing the posterior portion of the lesion to the tendon of the long head of the biceps brachii. The repair was done using tendon-to-tendon stitches. Subsequently, this combination was reattached to the greater tubercle using anchors. In this manner, tenodesis of the long head of the biceps was performed without tenotomy at its origin. At the end of the procedure, the repair was also verified by means of articular viewing (Figs. 1 4).

Fig. 1
- Lateral view of the left shoulder: extensive lesion of the supraspinatus with deficient rotator interval. LHB: long head of the biceps; ST: supraspinatus tendon.

Fig. 2
- Advancing of the posterior margin of the lesion to the long head of the biceps. LHB: long head of the biceps; ST: supraspinatus tendon.

Fig. 3
- Repair of the supraspinatus at the long head of the biceps. LHB: long head of the biceps; ST: supraspinatus tendon.

Fig. 4
- Final appearance of the repair, inserted into the greater tubercle. LHB: long head of the biceps; ST: supraspinatus tendon.

After the operation, the patients were kept immobilized using a sling for six weeks, and only doing passive exercises of the shoulder and active exercises of the elbow and wrist, which were started on the day after the surgery. After this period, the immobilization was removed and active movement of the shoulder was started in order to gain strength.

Results

The postoperative evaluation using the UCLA score was 28.95 points, with a range from 14 to 35 points. There was an elevation of 13.9 points in relation to the preoperative levels (p < 0.001) (Table 1). Among the 20 patients, six had excellent results (30%), nine good (45%), three fair (15%) and two poor (10%).

Table 1
Evaluation using the UCLA score before and after the operation.

UCLA	n	Mean	Min	Max	Significance (p)
Pre	20	15.05	10	24	< 0.001
Post	20	28.95	14	35

• Max: maximum; Min: minimum; Post: postoperative; Pre: preoperative

The mean postoperative length of follow-up among the patients in this study was 34 months, with a range from 24 to 60 months. The range of motion found in the reassessment was 151.19º (range: 100º to 160º) for elevation, 50.48º (range: 10º to 70º) for lateral rotation and T12 (range: L3 to T8) for medial rotation. For the statistical analysis on the medial rotation, we converted the vertebral level into a numerical scale from the trochanter to T7, represented as 0 to 13. The improvement in elevation, of 34 degrees (117º to 151.19º) was statistically significant (p = 0.001), as was the improvement in medial rotation of two vertebral levels (L2 to T12), with p = 0.025 (Table 2).

Table 2
Relationship between preoperative and postoperative mobility.

Movement	n	Mean	Min	Max	Significance (p)
Pre ELEV	20	117.62	60	160	0.001
Post ELEV	20	151.19	100	160
Pre LR	20	47.38	20	80	0.396
Post LR	20	50.48	10	70
Pre MR	20	6.48	0	13	0,025
Post MR	20	8.95	5	12

• ELEV: elevation; LR: lateral rotation; Max: maximum; Min: minimum; MR: medial rotation; Post: postoperative; Pre: preoperative

We evaluated the correlation between the results obtained using the postoperative UCLA score and the results from Goutalier's classification on the supra and infraspinatus muscles before the operation, but we did not find any statistically significant difference (p = 0.829/0.410) (Table 3).

Table 3
Relationship between postoperative UCLA score and Goutalier classification for supra and infraspinatus.

Goutalier	Significance (p)	Correlation coefficient for postoperative UCLA
Supra	0.829	0.052
Infra	0.41	-0.195

Out of the 20 cases included in this study, 18 underwent postoperative magnetic resonance imaging on the shoulder, 12 months after the surgery, which showed that six cases had healed completely (33.33%) and 12 had become torn again (66.66%).Two of the patients did not undergo the examination, which had been requested. Out of the 12 patients with renewed tears, only four cases presented any clinical signs of this. We evaluated the relationship between renewed tears and the postoperative UCLA score, but found that it did not have statistical significance (p = 0.120), probably because the sample was not representative (Table 4).

Table 4
Relação entre UCLA no período pós-operatório com re-ruptura.

	Re-rupture	n	Mean UCLA score	Significance (p)
Postoperative	Re-rupture	12	27.58	0.120
UCLA	Total Healing	6	31.83
	Total	18

Six patients (30%) reported having acromioclavicular pain and underwent the Munford procedure during the arthroscopic repair.

Discussion

Primary anatomical repair of the rotator cuff is not always possible in cases of extensive lesions. Factors such as lesion size, fatty muscle degeneration, large retractions and tendon adherence have a great influence on the repair.^1,10 In such cases, the options for surgical treatment include debridement, partial repair, tenotomy of the biceps, tendon transfers and use of grafts (fascia lata, long head of the biceps or synthetic materials).^{10 , 13}

Use of the tendon of the long head of the biceps has also emerged as a repair option for rotator cuff tears. Neviaser described use of the articular portion of the biceps, cut like an open book to aid in repairing rotator cuff lesions, in cases in which the edges of the lesion cannot be repaired primarily.¹⁴Wolfgang described use of the proximal portion of the tendon the long head of the biceps as a pedicled graft for repairing cuff tears. This author believed that by suturing the proximal portion into the lesion and keeping it inserted in the glenoid, a blood supply would be taken to the repair and its distal part would undergo autotenodesis.¹⁵ Bigliani described use of this tendon to facilitate repairs on extensive lesions.¹⁶ In 1997, Snyder described inclusion of the tendon of the long head of the biceps in suturing the rotator cuff, without tenotomizing it, for cases of large retraction of the supraspinatus with a deficient rotator cuff interval.⁹

Tendon mobility is a decisive factor in choosing the treatment method, and this is essential in order to be able to completely or partially repair rotator cuff tears.⁸ Mobilization of the anterior part of the retracted rotator cuff can be achieved by means of the technique of sliding the rotator interval, which was described by Tauro¹⁷, and by means of releasing the adherences that surround the supraspinatus tendon.

In cases in which the supraspinatus does not have mobility and the rotator interval is deficient, closure of the lesion seems to be impossible. In these cases, the technique of repairing the posterior portion of the rotator cuff tear together with the tendon of the long head of the biceps brachii, as described by Snyder, seems to be a solution.⁹In 2004, Richards and Burkhart⁸published this technique as a repair option in such cases, but without showing any sample.

We used this technique on 20 patients and achieved six excellent and nine good results, with significant improvement in shoulder function.Thus, 75% of the results were satisfactory. This was a good result in comparison with the results from partial repairs in the literature. Burkhart et al.¹⁸ reported that 57% of their results were satisfactory, from partial repairs in 14 patients with extensive lesions, while Duralde and Bair¹⁹found that 67% of their results were satisfactory, from partial repairs in 24 patients.

Partial repair has been shown to be a good treatment option for extensive rotator cuff injuries when complete anatomical repair of the lesion is not possible. Comparing the results from partial repair with those from debridement, for treating extensive lesions, partial repair has been shown to be superior. Berth et al.¹³ recently randomized 42 patients with extensive lesions for treatment either with debridement or with partial repair and found that shoulder function was significantly better with partial repair.

Although surgical repair of extensive rotator cuff lesions provides good clinical results, a high rate of renewed rupture has been described in the literature.^{2 4 10 20 22}

Gerber et al. showed improvements in shoulder function after open repair of extensive rotator cuff injuries, even though there was a 34% re-rupture rate.² Galatz et al.²⁰ reported that 17 cases out of 18 arthroscopic repairs on the rotator cuff presented renewed rupture but, despite this, they obtained excellent improvements in pain and shoulder function in their patients after 12 months of follow-up.They noted deterioration of the results after 24 months, but after this period 66.6% of the results were still satisfactory.

Like in the literature on repaired to extensive rotator cuff lesions,^{1 2 4 20 22} our rate of renewed rupture was high, affecting 66.6% (12 out of 18 cases), but even so, we obtained satisfactory clinical results (UCLA > 27 points) in eight of these 12 cases (66.6%). Although our sample was not representative, we did not find any statistically significant differences between the clinical results assessed using the postoperative UCLA scale and the re-rupture rate, or between UCLA and Goutalier's classification.

Conclusion

In this study on cases of extensive rotator cuff injury, with a retracted supraspinatus tendon and a deficient rotator interval, repair of the posterior portion of the rotator cuff, with inclusion of the long head of the biceps, was shown to be a good option.

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Publication Dates

• Publication in this collection
  Apr 2013

History

• Received
  08 Feb 2012
• Accepted
  06 June 2012