Augmentation of rotator cuff repair with gelatin–resorcin–formalin glue: a biomechanical study

2020 ◽  
pp. 175857322095116
Author(s):  
William J McNamara ◽  
Patrick H Lam ◽  
George AC Murrell
Keyword(s):  
Rotator Cuff ◽  
Rotator Cuff Repair ◽  
Ex Vivo ◽  
Biomechanical Study ◽  
Control Group ◽  
Cure Time ◽  
Ultimate Failure ◽  
Group 2 ◽  
Cuff Repair ◽  
Grf Glue

Introduction Rotator cuff tendons are typically reattached to the proximal humerus using transosseous sutures or suture anchors. Their primary mode of failure is at the tendon–bone interface. Methods We investigated the addition of an adhesive, gelatin–resorcin–formalin (GRF) glue, to a single-row rotator cuff repair (RCR) on ex vivo sheep models. We hypothesised the addition of GRF glue would increase the repair construct strength. The study consisted of three groups of six sheep infraspinatus tendons with an inverted-mattress stitch, tension-band configuration. Group 1 was the control group where no glue was applied. Group 2 involved applying 2 × 2 cm of GRF glue to the infraspinatus footprint and a 2-min curing time. Group 3 allowed for a 15-min cure time. Results Failure occurred at the tendon–bone–suture interface in 6/6 of the control group, and 4/6 from groups 2 and 3. Failure occurred via the suture pulling out of the anchor in 2/6 of groups 2 and 3. No significant differences were noted between all three groups in ultimate failure load, repair stiffness or total energy to failure (p > 0.05). Discussion The addition of GRF glue to the tendon–bone–suture interface did not enhance RCR strength in an ovine model.

scholarly journals Effect of Microcurrent Stimulation on Pain, Shoulder Function, and Grip Strength in Early Post-Operative Phase after Rotator Cuff Repair

Medicina ◽  
2021 ◽  
Vol 57 (5) ◽  
pp. 491
Author(s):  
Donghyun Yi ◽  
Hwanyong Lim ◽  
Jongeun Yim
Keyword(s):  
Rotator Cuff ◽  
Grip Strength ◽  
Rotator Cuff Repair ◽  
Controlled Trial ◽  
Shoulder Function ◽  
Control Group ◽  
Simple Shoulder Test ◽  
General Physical ◽  
Cuff Repair ◽  
Experimental Group

Background and Objectives: The purpose of this study was to investigate the effects of microcurrent stimulation on pain, shoulder function, and grip strength in patients with rotator cuff repair. Materials and Methods: This randomized single-blind controlled trial was conducted on inpatients of the rehabilitation department, and included 28 patients who underwent rotator cuff repair. Participants were randomly assigned to the experimental group (n = 14), treated with microcurrent stimulation, and the control group (n = 14), treated with false microcurrent stimulation. The microcurrent stimulation administered to the experimental group underwent general physical therapy and microcurrent stimulation three times a week for 4 weeks. Results: Changes in pain, range of motion in shoulder, simple shoulder test, and grip strength were assessed before and after the intervention. Both groups showed a significant decrease in pain and shoulder function (t = 27.412, 22.079, 19.079, and 18.561; p < 0.001), and grip strength showed a significant increase (t = −8.251 and −9.946; p < 0.001). The experimental group that underwent microcurrent stimulation exhibited a significant effect on pain, shoulder function, and grip strength compared with the control group that underwent false microcurrent stimulation (t = −2.17, −2.22, and 2.213; p = 0.039, 0.035, and 0.036). Conclusions: This study confirmed that microcurrent stimulation is effective for the treatment of rotator cuff repair patients.

Evaluation of BioCorkscrew and Bioknotless RC suture anchor rotator cuff repair fixation: an in vitro biomechanical study

2007 ◽  
Vol 15 (11) ◽  
pp. 1375-1381 ◽  
Author(s):  
Jennifer Tucker Ammon ◽  
John Nyland ◽  
Haw Chong Chang ◽  
Robert Burden ◽  
David N. M. Caborn
Keyword(s):  
Rotator Cuff ◽  
Rotator Cuff Repair ◽  
Suture Anchor ◽  
Biomechanical Study ◽  
Cuff Repair

scholarly journals Evaluation of 3 different rehabilitation protocols after rotator cuff repair, and the effectiveness of pool therapy: a randomized control study

2021 ◽  
Vol 9 (2_suppl) ◽  
pp. 2325967121S0000
Author(s):  
Alex Laedermann ◽  
Fayssal Kadri ◽  
Alec Cikes
Keyword(s):  
Physical Therapy ◽  
Rotator Cuff ◽  
Rotator Cuff Repair ◽  
The Self ◽  
Arthroscopic Rotator Cuff Repair ◽  
Independent Observer ◽  
Early Results ◽  
Group 2 ◽  
Arthroscopic Rotator Cuff ◽  
Cuff Repair

Objectives: Exercises performed in water have shown to improve strength and range of motion in various joint pathologies. This study aims to identify the best rehabilitation protocol for patients who undergo arthroscopic rotator cuff repair, and the effectiveness of a pool therapy protocol. Methods: Patients who underwent arthroscopic rotator cuff repair for small to medium sized rotator cuff tears, with small to moderate retraction of the affected tendon and who underwent surgery between 2013 and 2016, were randomized in 3 different groups at the time of surgical indication. Groups: 1. Patients who had rehabilitation with physical therapy and no aquatic protocol; The "Dry group", 2. Patients who had rehabilitation with physical therapy, including an aquatic protocol; The "Pool Group", 3. Patients who had self-rehabilitation alone, with no physical therapist. The "Self Group" follow-up: all patients were assessed by an independent observer. The mean outcome measures consisted of pre and postoperative SSV, Constant score, and patient satisfaction. Patients were followed-up at 4, 8 and 12 weeks postoperatively, as well as in 1 and 2 years. Results: Group 1 (Dry group) and Group 2 (Pool group) showed better Constant scores 2 months postoperatively, although this was not statistically significant. However, patients in group 2 (Pool group) showed statistically better Constant scores and overall satisfaction 3 months postoperatively. All the groups had similar results 6 months, 1 year and 2 years postoperatively, with slightly better outcomes for the Dry and Pool groups compared to the Self group. Conclusion: Water therapy after rotator cuff repair provides better early results compared to traditional "dry" rehabilitation or self-exercise therapy. The results remain better for patients who had pool or dry rehabilitation 1 and 2 years postoperatively, although the difference is not statistically significant in the long term.

Small Subchondral Drill Holes Improve Marrow Stimulation of Rotator Cuff Repair in a Rabbit Model of Chronic Rotator Cuff Tear

2020 ◽  
Vol 48 (3) ◽  
pp. 706-714 ◽  
Author(s):  
Yucheng Sun ◽  
Jae-Man Kwak ◽  
Erica Kholinne ◽  
Youlang Zhou ◽  
Jun Tan ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
Rotator Cuff Repair ◽  
Large Diameter ◽  
Biomechanical Testing ◽  
Rabbit Model ◽  
Small Diameter ◽  
Histological Evaluation ◽  
Control Group ◽  
Greater Tuberosity ◽  
Cuff Repair

Background: Microfracture of the greater tuberosity has been proved effective for enhancing tendon-to-bone healing after rotator cuff repair. However, no standard diameter for the microfracture has been established. Purpose/Hypothesis: This study aimed to assess treatment with large- and small-diameter microfractures to enhance healing during rotator cuff repair surgery in a rabbit model of chronic rotator cuff tear. It was hypothesized that a small-diameter microfracture had advantages in terms of tendon-to-bone integration, bone-tendon interface maturity, microfracture healing, and biomechanical properties compared with a large-diameter microfracture. Study Design: Controlled laboratory study. Methods: Bilateral supraspinatus tenotomy from the greater tuberosity was performed on 21 New Zealand White rabbits. Bilateral supraspinatus repair was performed 6 weeks later. Small-diameter (0.5 mm) microfracture and large-diameter microfracture (1 mm) were performed on the left side and right side, respectively, in 14 rabbits as a study group, and simple repair without microfracture was performed in 7 rabbits as a control group. At 12 weeks later, 7 of 14 rabbits in the study group were sacrificed for micro–computed tomography evaluation and biomechanical testing. Another 6 rabbits were sacrificed for histological evaluation. In the control group, 3 of the 7 rabbits were sacrificed for histological evaluation and the remaining rabbits were sacrificed for biomechanical testing. Results: Significantly better bone-to-tendon integration was observed in the small-diameter microfracture group. Better histological formation and maturity of the bone-tendon interface corresponding to better biomechanical results (maximum load to failure and stiffness) were obtained on the small-diameter microfracture side compared with the large-diameter side and the control group. The large-diameter microfracture showed worse radiographic and histological properties for healing of the microfracture holes on the greater tuberosity. Additionally, the large-diameter microfracture showed inferior biomechanical properties but similar histological results compared with the control group. Conclusion: Small-diameter microfracture showed advantages with enhanced rotator cuff healing for biomechanical, histological, and radiographic outcomes compared with large-diameter microfracture, and large-diameter microfracture may worsen the rotator cuff healing. Clinical Relevance: This animal study suggested that a smaller diameter microfracture may be a better choice to enhance healing in clinical rotator cuff repair surgery in humans.

scholarly journals Biomechanical evaluation of a novel double rip-stop technique with medial row knots for rotator cuff repair

2020 ◽  
Vol 9 (6) ◽  
pp. 285-292
Author(s):  
Zhanwen Wang ◽  
Hong Li ◽  
Zeling Long ◽  
Subin Lin ◽  
Andrew R. Thoreson ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
Rotator Cuff Repair ◽  
Failure Modes ◽  
Failure Load ◽  
Biomechanical Properties ◽  
Gap Formation ◽  
Ultimate Failure Load ◽  
Fresh Frozen ◽  
Ultimate Failure ◽  
Cuff Repair

Aims Many biomechanical studies have shown that the weakest biomechanical point of a rotator cuff repair is the suture-tendon interface at the medial row. We developed a novel double rip-stop (DRS) technique to enhance the strength at the medial row for rotator cuff repair. The objective of this study was to evaluate the biomechanical properties of the DRS technique with the conventional suture-bridge (SB) technique and to evaluate the biomechanical performance of the DRS technique with medial row knots. Methods A total of 24 fresh-frozen porcine shoulders were used. The infraspinatus tendons were sharply dissected and randomly repaired by one of three techniques: SB repair (SB group), DRS repair (DRS group), and DRS with medial row knots repair (DRSK group). Specimens were tested to failure. In addition, 3 mm gap formation was measured and ultimate failure load, stiffness, and failure modes were recorded. Results The mean load to create a 3 mm gap formation in the DRSK and DRS groups was significantly higher than in the SB group. The DRSK group had the highest load to failure with a mean ultimate failure load of 395.0 N (SD 56.8) compared to the SB and DRS groups, which recorded 147.1 N (SD 34.3) and 285.9 N (SD 89.8), respectively (p < 0.001 for both). The DRS group showed a significantly higher mean failure load than the SB group (p = 0.006). Both the DRS and DRSK groups showed significantly higher mean stiffness than the SB group. Conclusion The biomechanical properties of the DRS technique were significantly improved compared to the SB technique. The DRS technique with medial row knots showed superior biomechanical performance than the DRS technique alone.

scholarly journals The effectiveness of ramosetron and ondansetron for preventing postoperative nausea and vomiting after arthroscopic rotator cuff repair: a randomized controlled trial

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Sang-Uk Lee ◽  
Hyo-Jin Lee ◽  
Yang-Soo Kim
Keyword(s):  
Rotator Cuff ◽  
Rotator Cuff Repair ◽  
Postoperative Nausea And Vomiting ◽  
Complete Response ◽  
Arthroscopic Rotator Cuff Repair ◽  
Control Group ◽  
Antiemetic Drug ◽  
Arthroscopic Rotator Cuff ◽  
Cuff Repair ◽  
Rescue Antiemetic

Abstract Background Arthroscopic rotator cuff repair is a painful procedure, and treatment of emetic events associated with drugs used in the current multimodal pain management remains challenging. This study aimed to evaluate the effectiveness of ramosetron or ondansetron to relieve postoperative nausea and vomiting (PONV) and pain after arthroscopic rotator cuff repair. Methods In total, 122 consecutive patients undergoing arthroscopic rotator cuff repair were randomly allocated into three groups: ramosetron group (n = 39), ondansetron group (n = 43), and control group (n = 40). Then, 0.3 mg of ramosetron or 8 mg of ondansetron was administered intravenously at the end of surgery according to group. All patients received general anesthesia and multimodal pain management protocol including preemptive analgesic medication, fentanyl-based intravenous patient-controlled analgesia, and postoperative analgesic medication. Incidence of emetic events, rescue antiemetic requirements (10 mg of metoclopramide, IV), complete response, pain level, and side effects were recorded in three periods: 0–6, 6–24, and 24–48 h postoperatively. The severity of nausea and pain was evaluated using a visual analog scale. Results The ramosetron group tended to have a lower incidence and severity of nausea during the 6- to 24-h postoperative period and fewer rescue antiemetic drug requirements during the 0- to 48-h period than the control group, showing statistical significance. Additionally, the frequency of complete response of the ramosetron and ondansetron groups was significantly higher than that of the control group. No difference was found among the groups in the pain level except during the 0- to 6-h period. The two groups have a higher complete response during the 6- to 24-h period than the control group. Conclusions Ramosetron use led to a lower incidence, mild severity of nausea, and reduced use of rescue antiemetic drug after arthroscopic rotator cuff repair during the 6- to 24-h postoperative period than the control. Level of evidence Level I, randomized controlled trials, treatment study

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