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Medium- to Long-Term Clinical and Functional Outcomes of Isolated and Combined Subscapularis Tears Repaired Arthroscopically

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Medium- to Long-Term Clinical and Functional Outcomes of Isolated and Combined Subscapularis Tears Repaired Arthroscopically Clinical research Orthopedics and Traumatology Medium- to long-term clinical and functional outcomes of isolated and combined subscapularis tears repaired arthroscopically Augusto Cigolotti1, Carlo Biz1, Erik Lerjefors1,2, Gianfranco de Iudicibus1, Elisa Belluzzi1,3, Pietro Ruggieri1 1Orthopaedic and Traumatology Clinic, Department of Surgery, Oncology Corresponding author: and Gastroenterology DiSCOG, University of Padua, Padova, Italy Carlo Biz 2Orthopaedic Clinic, NU Hospital Group, NÄL Hospital Trollhättan and Uddevalla Orthopaedic and Hospital, Trollhättan, Sweden Traumatology Clinic 3Musculoskeletal Pathology and Oncology Laboratory, Department of Surgery, Department of Surgery Oncology and Gastroenterology DiSCOG, University of Padova, Padova, Italy Oncology and Gastroenterology DiSCOG Submitted: 15 February 2019; Accepted: 24 November 2019 University of Padua Online publication: 28 July 2020 via Giustiniani 2 35128, Padova, Italy Arch Med Sci 2021; 17 (5): 1351–1364 E-mail: [email protected] DOI: https://doi.org/10.5114/aoms.2020.97714 Copyright © 2020 Termedia & Banach Abstract Introduction: The purpose of this study was twofold. First, the efficacy of arthroscopic repair in patients with full thickness, isolated subscapularis tendon tears (I-STTs) or combined subscapularis tendon tears (C-STTs) in- volving the rotator cuff tendons was evaluated. Second, the outcomes be- tween these two groups were compared. The influence of age and gender on the cohort clinical outcomes was also analysed. Our hypothesis was that satisfactory functional results could be obtained arthroscopically in both groups without any influence of age or gender. Material and methods: Seventy-nine patients were enrolled: 15 with I-STTs and 64 with C-STTs. The clinical outcomes were assessed using Constant and Disabilities of the Arm, Shoulder and Hand (DASH) scores, Numeric Rat- ing Scale (NRS) for pain and Visual Analogue Scale (VAS) for satisfaction. The subscapularis strength was assessed using a comparative dynamometric bear-hug test. Group outcomes were compared, including statistical analysis. Results: For each group, there were no differences regarding the subscapu- laris strength of the operated and non-operated shoulders. A compari- son of the post- with the pre-operative outcomes showed an increase in the Constant score and a decrease in the NRS. Comparing the two groups, we found no difference in strength of the operated and non-operated shoul- ders, but a significant difference in relation to pre-operative Constant score and pre-operative NRS. Age was negatively correlated with both pre-opera- tive and post-operative Constant scores. No association was found between gender and the outcomes, although the DASH score was higher in women. Conclusions: Arthroscopic repair of STTs provided functional restoration, pain relief and patient satisfaction in both groups. Age and gender did not affect the clinical outcomes achieved by arthroscopic STT repair. Key words: arthroscopy, Constant score, rotator cuff, subscapularis tendon tears, subscapularis repair. Introduction Symptomatic rotator cuff tears (RCTs) are one of the major origins of shoulder pain and functional impairment. The subscapularis is as strong as the other three muscles of the rotator cuff together, and its in- Creative Commons licenses: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY -NC -SA 4.0). License (http://creativecommons.org/licenses/by-nc-sa/4.0/). Augusto Cigolotti, Carlo Biz, Erik Lerjefors, Gianfranco de Iudicibus, Elisa Belluzzi, Pietro Ruggieri tegrity is therefore crucial in maintaining net joint diagnosis of unilateral, full thickness STT, resis- reaction force and glenohumeral stability [1]. tant to conservative treatment, were prospectively Subscapularis tendon tears (STTs) are not as un- enrolled in this study in our hospital and divided common as they were thought to be in the past [2], into two groups according to injury type: I-STTs with an estimated prevalence from 27.4% [3] to and C-STTs. All subjects participating in this study 43% [4] among all RCTs, and incidence reported to received a thorough explanation of the risks and be up to 37% [5]. In the literature, the relative prev- benefits of inclusion and gave their oral and writ- alence of isolated STTs (I-STTs) is reported from ten informed consent to publish the data. This 17% [6] to 25% [7], while the combined STTs (C-STTs) study was performed in accordance with the eth- are the most common, occurring in conjunction with ical standards of the 1964 Declaration of Helsinki supraspinatus tears, such as anterosuperior RCTs or as revised in 2000 and those of Good Clinical Prac- as massive RCTs [6, 7]. There are many options for tice after approval by the local ethical committee. the treatment of SSTs. Initially, most tears should be treated conservatively, especially if the tear is par- Inclusion and exclusion criteria tial or has a chronic onset. Conservative solutions The inclusion criteria were as follows: the pre- are activity modifications, physiotherapy, nonsteroi- operative diagnosis of at least a full thickness ten- dal anti-inflammatory drugs (NSAIDs) and steroid don tear of the superior third of the subscapularis injections. Surgery should be reserved for cases (Lafosse II to V [10]) on the basis of physical ex- of persistent pain and/or loss of function despite amination and confirmed by magnetic resonance 3–6-month accurate conservative management. imaging (MRI); failure of conservative treatment, Surgical treatment can be performed either by involving a period of relative rest, nonsteroidal anti- an open approach or by arthroscopic techniques [8]. inflammatory medication, physiotherapy (at least Arthroscopic surgery for subscapularis reparation 3 months), corticosteroid injections (more than 2); was first described in 2002 by Burkhart and Thera- functional impairment or unacceptable pain for ny and showed brilliant short-term results [9]. Some a minimum of 3 months; arthroscopic treatment at years later, Lafosse et al. introduced a 5-type classi- our institution by the same shoulder surgeon; a min- fication of STTs and described a surgical procedure imum follow-up period of 24 months; and ability to for the arthroscopic repair of these lesions depend- provide informed consent for participation. Specif- ing on their classification [10]. Additional studies ic patients’ exclusion criteria were partial superior have confirmed satisfactory mid- and long-term third lesion of the subscapularis tendon (Lafosse I), functional outcomes [11–14]. severe glenohumeral osteoarthritis, neurological dis- The influence of age on the outcomes of RCTs eases, presence of tumours, infections and previous has been analysed by several authors, conclud- surgery or revision repairs on the ipsilateral shoulder. ing that good results could be achieved even in the elderly [15, 16]. Adams et al. reported that none Pre-operative evaluation of their post-operative outcome evaluations was significantly associated with age [11]. Regarding For each patient, a detailed clinical pre-operative gender as a prognostic factor for RCTs, the pub- examination was performed, including inspection, lished studies have used distinct scores reporting range of movement (ROM), internal rotation (IR) different conclusions [17, 18]. However, no studies strength and a special test of both shoulders. Pas- have investigated the influence of gender on STTs. sive and active ROM of the shoulder (IR, external ro- The primary aim of the present, prospective study tation and forward flection) were assessed, noting was first to evaluate the efficacy of arthroscopic re- any deficiencies relative to a normal contralateral pair in two groups of patients with full thickness shoulder. The clinical suspicion of a tear was con- I-STTs or C-STTs involving the rotator cuff tendons firmed in all patients by pre-operative radiological and secondly, to compare post-operative outcomes evaluation, including X-rays and MRI of the affect- between these two patient groups. Further, the in- ed shoulder (Figure 1). The Constant score was com- fluence of age and gender on the cohort functional pleted, and a final score between 0 (no functional- outcomes was assessed. Our hypothesis was that ity) and 100 (full functionality) was obtained [19]. It satisfactory functional results could be obtained ar- consisted of individual scores for pain (0–15 points), throscopically in both groups without any influence activity of daily living (0–20 points), movement (0– of age or gender. 40 points) and strength (0–25) [19]. Pain was rat- ed using a numeric rating scale (NRS, range 15–0 Material and methods points), according to the scheme of the Constant score. All patients received a standard pre-opera- Patients tive assessment by standard radiographs, includ- Between January 2010 and December 2014, ing anteroposterior views (with the arm in internal a consecutive series of Caucasian patients with rotation, external rotation, and neutral rotation 1352 Arch Med Sci 5, August / 2021 Medium- to long-term clinical and functional outcomes of isolated and combined subscapularis tears repaired arthroscopically A B C D E F Figure 1. Magnetic resonance images of subscapular tears highlighted by the white arrow. A–C – Acute traumatic isolated subscapularis tear (Lafosse IV) and perilesional oedema. D–F – Subscapularis (Lafosse II) and supraspina- tus tears in degenerated tendons with marked
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