Improved Rotator Cuff Footprint Contact Characteristics With an Augmented Repair Construct Using Lateral Edge Fixation

2019 ◽  
Vol 48 (2) ◽  
pp. 444-449
Author(s):  
Ekaterina Urch ◽  
Charles C. Lin ◽  
Yasuo Itami ◽  
Nilay A. Patel ◽  
Michelle H. McGarry ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
Gold Standard ◽  
External Rotation ◽  
Contact Forces ◽  
Rotator Cuff Tears ◽  
Shoulder Abduction ◽  
Average Difference ◽  
Double Row ◽  
Lateral Edge ◽  
Contact Pressures

Background: The transosseous-equivalent (TOE) rotator cuff repair construct has become the gold standard for the repair of medium and large rotator cuff tears. Repair failure, however, continues to be a problem. One contributing factor may be the inability of the TOE repair to replicate the native footprint contact characteristics during shoulder movement, especially in rotation. This results in higher strain across the repair, which leads to gapping and predisposes the construct to failure. In an effort to better reproduce the native compression forces throughout the footprint, an augmented TOE construct supplemented with lateral edge fixation is proposed, and the contact characteristics were compared with those of the gold standard TOE construct. Hypothesis: The augmented TOE repair will demonstrate improved footprint contact characteristics when compared with the classic TOE repair. Study Design: Controlled laboratory study. Methods: Ten fresh-frozen cadaveric shoulders underwent supraspinatus repair using both the classic TOE double-row construct and the augmented TOE repair. For the augmented repair, 2 luggage tag sutures were used to secure the lateral edge and incorporated into the lateral row anchors. A Tekscan pressure sensor (Tekscan Inc) placed under the repaired tendon was used to collect footprint contact area, force, peak pressure, and contact pressure data for each construct. Results: The augmented construct demonstrated significantly greater contact forces (average difference, 4.9 N) and significantly greater contact pressures (average difference, 23.1 kPa) at all degrees of abduction and all degrees of rotation. At 30° of internal and 30° of external rotation at both 0° and 30° of shoulder abduction, the augmented construct demonstrated significantly greater peak contact pressures. Conclusion: The augmented construct showed superior contact characteristics when compared with the classic TOE technique. The addition of lateral edge fixation to the classic TOE repair significantly improves bone-tendon contact characteristics with minimal additional surgical effort. Clinical Relevance: The results of this study indicate that lateral augmentation of the classic TOE repair produces a biomechanically superior construct that may optimize tendon healing.

scholarly journals Two-year results of double row repair for medium sized rotator cuff tear in elderly patients

2019 ◽  
Vol 6 (2) ◽  
pp. 423
Author(s):  
Afsar T. Ozkut
Keyword(s):  
Rotator Cuff ◽  
Internal Rotation ◽  
Rotator Cuff Tear ◽  
External Rotation ◽  
Constant Score ◽  
Rotator Cuff Tears ◽  
Double Row ◽  
Cuff Tear ◽  
Forward Flexion

Background: Rotator cuff tears are treated surgically when conservative treatment methods fail. Since osteoporosis is common and the cuff is degenerative in nature, it may be a challenge to treat the tears surgically in the elderly. The objective of this study was to evaluate the results rotator cuff repair with double row two anchors (one medial and one lateral) for middle sized tears in patients over 65years old.Methods: 18 patients who are over 65years old treated arthroscopically for medium sized rotator cuff tear were included in the study. Inclusion criteria were patients with MR findings and physical findings consistent with medium sized (1-3cm) rotator cuff tears, patients with follow up period of at least 2years. All of the patients were repaired using (two anchors, one medially and one laterally placed) double row technique arthroscopically.  The patients were evaluated with constant Murley score and ASES scores. All these measurements (both ROM and functional tests) were performed preoperatively and at postoperative third sixth months, first year and after second year.Results: Mean age of the patients was 69.3 (±2.6). The mean follows up period was 34months (±4.1) Preoperative mean forward flexion and external rotation were 127.3±25.3º and 48.9±14.6º respectively. The preoperative mean internal rotation was 9.1±6.9º. Preoperative mean ASES score was 59.1º (±9.6) and mean constant score was 53.7º (±11.2). At the last follow up mean forward flexion was 158.3º (±17.9), external rotation was 63.2º (±11.4) and internal rotation was 9.3º (±7.3).  Mean ASES score and constant score of the patients were 84.3 (±9.1) and 77.3 (±10.8) in the last follow up.Conclusions: It is possible to obtain good results in medium sized rotator cuff tears in patients over 65years old particularly if fatty degeneration over grade II has not prevailed.

scholarly journals Lattisimus Dorsi Transfer assisted by arthroscopy for the treatment of irreparable posterolateral Rotator Cuff Tears

2017 ◽  
Vol 5 (1_suppl) ◽  
pp. 2325967117S0000
Author(s):  
José María Silberberg Muiño ◽  
Martín Alejandro Gimenez ◽  
Mauro Gabriel Maroa Salvucci ◽  
Diego Ferro ◽  
Ramón Muiña Rullan
Keyword(s):  
Rotator Cuff ◽  
External Rotation ◽  
Rotator Cuff Tears ◽  
Shoulder Abduction ◽  
Duration Of Symptoms ◽  
Palliative Procedure ◽  
Arthroscopically Assisted ◽  
Mid Term Results ◽  
Radiological Studies

Objective: To evaluate subjective and functional mid term results of patients treated by a lattisimus dorsi tendón transfer arthroscopically assisted for massive irreparable posterolateral injuries of the Rotator Cuff. Methods: Between 2009 and 2012, 17 Lattisimus Dorsi transfers (Paribelli technique) for irreparable posterolateral rotator cuff tears were performed. Distribution by sex: 12 men and 5 women with a mean age of 53 years old (range, 40-63). Thirteen right shoulders and 4 left shoulders. Average duration of symptoms prior to surgery was 8 months (range, 6-13 months). Mean follow-up was 28 months (range, 18-44). Patients were evaluated by the VAS, satisfaction rate, the Constant Modified Scale, postoperative range of motion and strength. Postoperative radiological studies included simple AP radiographs and MRI in order to measure AC distance and asses the integrity of the plasty. Results: Postoperative Constant Modified score averaged 63.54 points. (average increase of 13 points compared to preoperative score. (P ..05)). Active Mobility: a) Mean elevation: 142° postop vs. 119° preop (p <.001). b) Mean abduction: 138.24º postop vs. 112.35º preop (p <.001). c) Mean external rotation 40° postop vs. 20.29º preop (p <.004). Insert text. Conclusion: Lattisimus Dorsi transfer in patients with posterolateral massive irreparable injuries of the RC, is a highly demanding and palliative procedure for those cases with loss of active mobility, especially lifting and shoulder abduction.

Three-Dimensional Evaluation of Cyclic Displacement in Single-Row and Double-Row Rotator Cuff Reconstructions Under Static External Rotation

2012 ◽  
Vol 41 (1) ◽  
pp. 153-162 ◽  
Author(s):  
Olaf Lorbach ◽  
Matthias Kieb ◽  
Florian Raber ◽  
Lüder C. Busch ◽  
Dieter M. Kohn ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
External Rotation ◽  
Rotator Cuff Tears ◽  
Gap Formation ◽  
Double Row ◽  
Single Row ◽  
Initial Rupture ◽  
Cyclic Displacement ◽  
Double Row Repair ◽  
Tear Size

Background: The double-row suture bridge repair was recently introduced and has demonstrated superior biomechanical results and higher yield load compared with the traditional double-row technique. It therefore seemed reasonable to compare this second generation of double-row constructs to the modified single-row double mattress reconstruction. Hypothesis: The repair technique, initial tear size, and tendon subregion will have a significant effect on 3-dimensional (3D) cyclic displacement under additional static external rotation of a modified single-row compared with a double-row rotator cuff repair. Study Design: Controlled laboratory study. Methods: Rotator cuff tears (small to medium: 25 mm; medium to large: 35 mm) were created in 24 human cadaveric shoulders. Rotator cuff repairs were performed as modified single-row or double-row repairs, and cyclic loading (10-60 N, 10-100 N) was applied under 20° of external rotation. Radiostereometric analysis was used to calculate cyclic displacement in the anteroposterior (x), craniocaudal (y), and mediolateral (z) planes with a focus on the repair constructs and the initial tear size. Moreover, differences in cyclic displacement of the anterior compared with the posterior tendon subregions were calculated. Results: Significantly lower cyclic displacement was seen in small to medium tears for the single-row compared with double-row repair at 60 and 100 N in the x plane ( P = .001) and y plane ( P = .001). The results were similar in medium to large tears at 100 N in the x plane ( P = .004). Comparison of 25-mm versus 35-mm tears did not show any statistically significant differences for the single-row repairs. In the double-row repairs, lower gap formation was found for the 35-mm tears ( P ≤ .05). Comparison of the anterior versus posterior tendon subregions revealed a trend toward higher anterior gap formation, although this was statistically not significant. Conclusion: The tested single-row reconstruction achieved superior results in 3D cyclic displacement to the tested double-row repair. Extension of the initial rupture size did not have a negative effect on the biomechanical results of the tested constructs. Clinical Relevance: Single-row repairs with modified suture configurations provide comparable biomechanical strength to double-row repairs. Furthermore, as increased gap formation in the early postoperative period might lead to failure of the construct, a strong anterior fixation and restricted external rotation protocol might be considered in rotator cuff repairs to avoid this problem.

Double-Layer Rotator Cuff Repair: Anatomic Reconstruction of the Superior Capsule and Rotator Cuff Improves Biomechanical Properties in Repairs of Delaminated Rotator Cuff Tears

2018 ◽  
Vol 46 (13) ◽  
pp. 3165-3173 ◽  
Author(s):  
Leo Pauzenberger ◽  
Philipp R. Heuberer ◽  
Felix Dyrna ◽  
Elifho Obopilwe ◽  
Bernhard Kriegleder ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
Double Layer ◽  
Rotator Cuff Repair ◽  
External Rotation ◽  
Biomechanical Properties ◽  
Rotator Cuff Tears ◽  
Double Row ◽  
Cyclical Loading ◽  
Double Row Repair ◽  
Cuff Repair

Background: Delamination in rotator cuff tears has been identified as a prognostic factor for negative outcome after repair, with a reported prevalence between 38% and 88%. Purpose: To compare biomechanical properties of 3 repair techniques for delaminated rotator cuff tears. Study Design: Controlled laboratory study. Methods: Eighteen fresh-frozen cadaveric shoulders were used to evaluate rotator cuff footprint reconstruction, contact area and pressure, displacement under cyclical loading, and load to failure of 3 double-row repair configurations: double-row suture repair with medial row knots (medially knotted bridge, mkB); knotless double-row repair using suture tapes (knotless bridge, klB); and knotless double-row, double-layer-specific repair (double-layer, DL). Dynamic pressure sensors were used to assess contact patterns at the footprint region in 0°, 30°, and 60° of glenohumeral abduction and 5 rotational positions (0°, 30° of internal rotation, 30° of external rotation, 60° of internal rotation, 60° of external rotation). Optical markers were used to document whole tendon and individual layer displacement after rotator cuff repair under cyclical loading for 200 cycles (10 N to 100 N at 1 Hz). Specimens were then loaded monotonically to failure at a rate of 33 mm/min. Results: Mean contact area and footprint restoration were highest in the DL group at 60° of glenohumeral abduction for all rotational positions (mkB mean ± SD, 195.4 ± 54.3 mm2, 66.7% ± 19.7%; klB, 250.6 ± 34.9 mm2, 76.2% ± 10.3%; DL, 318.4 ± 36.6 mm2, 109.1% ± 24.0%; P < .001). The double-layer-specific repair showed the least displacement under cyclical loading (mkB mean ± SD, 0.53 ± 0.18 mm; klB, 0.79 ± 0.37 mm; DL, 0.31 ± 0.24 mm; P = .029), most closely resembling the native tendon. Peak loads at failure were comparable between repair groups (mkB mean ± SD, 366.92 ± 70.59 N; klB, 280.05 ± 77.66 N; DL, 398.35 ± 109.04 N; P = .083). Conclusion: Anatomic restoration of the superior capsular and tendon insertion in delaminated rotator cuff tears with a double-layer-specific repair configuration demonstrated superior footprint restoration with increasing abduction, while providing construct displacement comparable to the native tendon under cyclical loading. Peak load at failure was comparable between repair constructs. Clinical Relevance: The prevalence and clinical importance of delaminated rotator cuff tears have long been underestimated. Anatomically correct individual reconstruction of the superior capsule and rotator cuff could restore near-native biomechanics and potentially reduce the risk of rotator cuff repair failure.

scholarly journals The Area of Impingement in the Throwing Versus Nonthrowing Shoulder of Collegiate Baseball Players: An MRI Study of the Simulated Late-Cocking Phase of Throwing

2021 ◽  
Vol 9 (3) ◽  
pp. 232596712199213
Author(s):  
Makoto Takahashi ◽  
Koji Iwamoto ◽  
Masahiko Monma ◽  
Hirotaka Mutsuzaki ◽  
Masafumi Mizukami
Keyword(s):  
Rotator Cuff ◽  
Glenohumeral Joint ◽  
External Rotation ◽  
Rotator Cuff Tears ◽  
Shoulder Abduction ◽  
Baseball Players ◽  
Greater Tuberosity ◽  
Internal Impingement ◽  
Collegiate Baseball ◽  
Cystic Changes

Background: During shoulder abduction and external rotation, internal impingement can occur when compressive forces between the greater tuberosity and the posterior glenoid rim pinch the undersurface of the rotator cuff. Previous studies on internal impingement have focused on qualitative results such as pathological findings; however, few studies have quantified the area of impingement (AOI) of the rotator cuff muscles between the greater tuberosity and the posterior glenoid rim. Purpose: To compare the AOI between the throwing and nonthrowing shoulders of baseball players. Study Design: Controlled laboratory study. Methods: A total of 14 asymptomatic male collegiate baseball players participated in this study. The AOI in both the throwing and the nonthrowing shoulders was calculated using magnetic resonance imaging (MRI) scans. The MRI measurements were collected with the shoulder at 90° of abduction and at 90° and 100° of external rotation. The area, width, and depth of impingement as well as cystic changes in the greater tuberosity and degeneration in the posterior labrum were compared between the throwing and nonthrowing shoulders. Results: The AOI was significantly greater in the throwing shoulders than in the nonthrowing shoulders (90° of external rotation: 32.4 vs 19.1 mm2, respectively; 100° of external rotation, 28.0 vs 15.6 mm2, respectively; P < .001 for both). Compared with the nonthrowing shoulders, there were more positive findings in the throwing shoulders regarding greater tuberosity cystic changes (0 vs 7, respectively; P = .006) and posterior labral degeneration (3 vs 13, respectively; P < .001). Conclusion: The AOI and the number of lesions in the greater tuberosity and posterior labrum were greater in throwing shoulders than in nonthrowing shoulders. Therefore, damage to the insertion of the rotator cuff muscles may affect internal impingement. Clinical Relevance: Lesions in the greater tuberosity and posterior labrum in throwing shoulders may increase the AOI by expanding the joint gap behind the glenohumeral joint. Impingement of the greater tuberosity and the posterior glenoid rim may lead to rotator cuff tears.

Evaluating the Outcomes of Rotator Cuff Repairs With Polytetrafluoroethylene Patches for Massive and Irreparable Rotator Cuff Tears With a Minimum 2-Year Follow-up

2018 ◽  
Vol 46 (13) ◽  
pp. 3155-3164 ◽  
Author(s):  
Vasanth Seker ◽  
Lisa Hackett ◽  
Patrick H. Lam ◽  
George A.C. Murrell
Keyword(s):  
Rotator Cuff ◽  
Range Of Motion ◽  
External Rotation ◽  
Case Series ◽  
Shoulder Function ◽  
Rotator Cuff Tears ◽  
Level Of Evidence ◽  
Irreparable Tear ◽  
Pain At Rest

Background: Massive and irreparable rotator cuff tears are difficult to manage surgically. One technique is to use a synthetic polytetrafluoroethylene (PTFE) patch to bridge the tear. However, there is little information regarding the outcomes of this procedure. Purpose: To determine the ≥2-year outcomes of patients for whom synthetic patches were used as tendon substitutes to bridge irreparable rotator cuff defects. Study Design: Case series; Level of evidence, 4. Methods: This retrospective cohort study used prospectively collected data. Patients included those with a synthetic patch inserted as an interposition graft for large and/or irreparable rotator cuff tears with a minimum 2-year follow-up. Standardized assessment of shoulder pain, function, range of motion, and strength was performed preoperatively, at 6 and 12 weeks, and at 6 months and ≥2 years. Radiograph and ultrasound were performed preoperatively, at 6 months, and ≥2 years. Results: At a mean of 36 months, 58 of 68 eligible patients were followed up, and 53 of 58 (90%) patches remained in situ. Three patches failed at the patch-tendon interface, while 1 patient (2 shoulders/patches) went on to have reverse total shoulder replacements. Patient-ranked shoulder stiffness ( P < .001), frequency of pain with activity and sleep ( P < .0001), level of pain at rest and overhead ( P < .0001), and overall shoulder function improved from bad to very good ( P < .0001) by 6 months. Supraspinatus (mean ± SEM: 29 ± 16 N to 42 ± 13 N) and external rotation (39 ± 13 N to 59 ± 15 N) strength were the most notable increases at the ≥2-year follow-up ( P < .0001). Passive range of motion also improved by 49% to 67%; forward flexion, from 131° to 171°; abduction, from 117° to 161°; external rotation, from 38° to 55°; and internal rotation, from L3 to T10 ( P < .0001) preoperatively to ≥2 years. The most improvement in passive range of motion occurred between 12 months and ≥2 years. The mean (SD) Constant-Murley score was 90 (12), while the American Shoulder and Elbow Surgeons score was 95 (8). Conclusion: At 36 months postoperatively, patients who had synthetic patches used as tendon substitutes to bridge irreparable rotator cuff defects reported less pain and greater overall shoulder function as compared with preoperative assessments. They demonstrated improved range of passive motion and improved strength. The data support the hypothesis that the technique of using a synthetic PTFE patch to bridge a large and/or irreparable tear has good construct integrity and improves patient and clinical outcomes.

scholarly journals Outcome and Structural Integrity of Rotator Cuff after Arthroscopic Treatment of Large and Massive Tears with Double Row Technique: A 2-Year Followup

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Ignacio Carbonel ◽  
Angel A. Martínez ◽  
Elisa Aldea ◽  
Jorge Ripalda ◽  
Antonio Herrera
Keyword(s):  
Rotator Cuff ◽  
Range Of Motion ◽  
Functional Outcome ◽  
Rotator Cuff Repair ◽  
Structural Integrity ◽  
Rotator Cuff Tears ◽  
Full Thickness ◽  
Double Row ◽  
Massive Rotator Cuff Tears ◽  
Cuff Repair

Purpose. The purpose of this study was to evaluate the functional outcome and the tendon healing after arthroscopic double row rotator cuff repair of large and massive rotator cuff tears.Methods. 82 patients with a full-thickness large and massive rotator cuff tear underwent arthroscopic repair with double row technique. Results were evaluated by use of the UCLA, ASES, and Constant questionnaires, the Shoulder Strength Index (SSI), and range of motion. Follow-up time was 2 years. Magnetic resonance imaging (MRI) studies were performed on each shoulder preoperatively and 2 years after repair.Results. 100% of the patients were followed up. UCLA, ASES, and Constant questionnaires showed significant improvement compared with preoperatively (P<0.001). Range of motion and SSI in flexion, abduction, and internal and external rotation also showed significant improvement (P<0.001). MRI studies showed 24 cases of tear after repair (29%). Only 8 cases were a full-thickness tear.Conclusions. At two years of followup, in large and massive rotator cuff tears, an arthroscopic double row rotator cuff repair technique produces an excellent functional outcome and structural integrity.

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