scholarly journals Anatomic and Biomechanical Comparison of the Classic and Congruent-Arc Techniques of the Latarjet Procedure

2017 ◽  
Vol 5 (3_suppl3) ◽  
pp. 2325967117S0011
Author(s):  
Scott R. Montgomery ◽  
Jan Christoph Katthagen ◽  
Jacob D. Mikula ◽  
Daniel C. Marchetti ◽  
Dimitri S. Tahal ◽  
...  
Keyword(s):  
Surface Area ◽  
Failure Load ◽  
Biomechanical Testing ◽  
Biomechanical Model ◽  
Cadaver Study ◽  
Latarjet Procedure ◽  
Glenoid Defect ◽  
Advantages And Disadvantages ◽  
Classic Technique ◽  
Biomechanical Strength

Objectives: The Latarjet procedure is commonly performed using either the classic (standing) or the congruent-arc (lying) technique. There are potential clinical advantages and disadvantages of each technique. However, the anatomic and biomechanical effects, benefits, and limitations of each technique are unknown. The purpose of this study was to compare the anatomy and biomechanical strength of fixation between the two techniques. Methods: A biomechanical cadaver study was performed with 20 pairs of male and female shoulders (n=40). One of each pair of shoulders was randomly assigned to receive the classic or congruent-arc technique. Coracoid and glenoid anatomic measurements were collected prior to biomechanical testing. A pull force was applied through the conjoined tendon to replicate forces experienced by the coracoid graft in the early post-operative period, and the failure load was determined for each specimen ( Figure 1 ). [Figure: see text] Results: The mean surface area available for fixation in the classic technique was 263.3 mm2 compared to 177.0 mm2 in the congruent-arc group (p<0.001). In the classic group, 36% of the glenoid width was re-created, and 50% was re-created in the congruent-arc group (p<0.001). The congruent-arc technique resulted in a significantly lower (p=0.005) mean failure load (238.9 ± 91.2 N) compared to the classic technique (303.0 ± 114 N). Failure load was significantly higher in males (p=0.037); male specimens had a mean failure load of 343.9 ± 122.2 N for the classic technique and 289.4 ± 73.0 N for the congruent-arc technique, and females had a mean failure load of 266.1 ± 97.7 and 193.5 ± 84.0 N, respectively ( Figure 2 ). [Figure: see text] Conclusion: In this biomechanical model, the classic technique of the Latarjet procedure provided a greater surface area for healing to the glenoid and greater biomechanical strength of fixation when compared to the congruent-arc technique. The congruent-arc technique allowed restoration of a larger glenoid defect.

scholarly journals Anatomic and Biomechanical Comparison of the Classic and Congruent-Arc Techniques of the Latarjet Procedure

2017 ◽  
Vol 45 (6) ◽  
pp. 1252-1260 ◽  
Author(s):  
Scott R. Montgomery ◽  
J. Christoph Katthagen ◽  
Jacob D. Mikula ◽  
Daniel Cole Marchetti ◽  
Dimitri S. Tahal ◽  
...  
Keyword(s):  
Surface Area ◽  
Failure Load ◽  
Tensile Force ◽  
Early Postoperative Period ◽  
Fixation Strength ◽  
Latarjet Procedure ◽  
Glenoid Defect ◽  
Advantages And Disadvantages ◽  
Initial Fixation ◽  
Classic Technique

Background: The Latarjet procedure is commonly performed using either the classic or the congruent-arc technique. Each technique has potential clinical advantages and disadvantages. However, data on the anatomic and biomechanical effects, benefits, and limitations of each technique are limited. Hypothesis/Purpose: To compare the anatomy and biomechanical fixation strength (failure load) between the 2 techniques. It was hypothesized that the classic technique would have superior initial fixation when compared with the congruent-arc technique and that this would be affected by sex and coracoid size. Study Design: Controlled laboratory study. Methods: A biomechanical cadaver study was performed with 20 pairs of male and female shoulders. One of each pair of shoulders was randomly assigned to receive the classic or congruent-arc technique. Coracoid and glenoid anatomic measurements were collected before biomechanical testing. A tensile force was applied through the conjoined tendon to replicate forces experienced by the coracoid graft in the early postoperative period, and the failure load was determined for each specimen. Results: The mean ± SD surface area available for fixation was 263 ± 63 mm2 in the classic technique compared with 177 ± 63 mm2 in the congruent-arc group ( P < .001). 36% of the glenoid width was recreated in the classic group and 50% in the congruent-arc group ( P < .001). The congruent-arc technique resulted in a significantly lower ( P = .005) mean failure load (239 ± 91 N) compared with the classic technique (303 ± 114 N). Failure load was significantly higher in males ( P = .037); male specimens had a mean failure load of 344 ± 122 N for the classic technique and 289 ± 73 N for the congruent-arc technique, and females had a mean failure load of 266 ± 98 N and 194 ± 84 N, respectively. Conclusion: In this biomechanical model, the classic technique of the Latarjet procedure provided a greater surface area for healing to the glenoid and superior initial fixation when compared with the congruent-arc technique. The congruent-arc technique allowed restoration of a larger glenoid defect. Clinical Relevance: The classic and congruent-arc techniques of coracoid transfer have anatomic and biomechanical advantages and disadvantages that should be considered when choosing between the 2 techniques.

Biomechanical Strength of Screw Versus Suture Button Fixation in the Latarjet Procedure: A Cadaver Study

2021 ◽  
Vol 30 (7) ◽  
pp. e449
Author(s):  
Gazi Huri ◽  
Yasin Hakverdiyev ◽  
Mehmet Kaymakoglu ◽  
Erdi Ozdemir ◽  
Pinar Yilgor Huri ◽  
...  
Keyword(s):  
Cadaver Study ◽  
Latarjet Procedure ◽  
Suture Button ◽  
Biomechanical Strength

scholarly journals Trans-obturator cable fixation of open book pelvic injuries

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Martin C. Jordan ◽  
Veronika Jäckle ◽  
Sebastian Scheidt ◽  
Fabian Gilbert ◽  
Stefanie Hölscher-Doht ◽  
...  
Keyword(s):  
Pelvic Ring ◽  
Testing Machine ◽  
Biomechanical Testing ◽  
Pubic Symphysis ◽  
Cadaver Study ◽  
Steel Cable ◽  
Reliable Technique ◽  
Peak Displacement ◽  
Total Displacement ◽  
Cable Fixation

AbstractOperative treatment of ruptured pubic symphysis by plating is often accompanied by complications. Trans-obturator cable fixation might be a more reliable technique; however, have not yet been tested for stabilization of ruptured pubic symphysis. This study compares symphyseal trans-obturator cable fixation versus plating through biomechanical testing and evaluates safety in a cadaver experiment. APC type II injuries were generated in synthetic pelvic models and subsequently separated into three different groups. The anterior pelvic ring was fixed using a four-hole steel plate in Group A, a stainless steel cable in Group B, and a titan band in Group C. Biomechanical testing was conducted by a single-leg-stance model using a material testing machine under physiological load levels. A cadaver study was carried out to analyze the trans-obturator surgical approach. Peak-to-peak displacement, total displacement, plastic deformation and stiffness revealed a tendency for higher stability for trans-obturator cable/band fixation but no statistical difference to plating was detected. The cadaver study revealed a safe zone for cable passage with sufficient distance to the obturator canal. Trans-obturator cable fixation has the potential to become an alternative for symphyseal fixation with less complications.

scholarly journals Modified Arthroscopic Latarjet Procedure: Suture-button Fixation will not Cause Obvious Increasement of Superior Instability at 5-Year Follow-up

2020 ◽  
Author(s):  
Daqiang Liang ◽  
Haifeng Liu ◽  
Xinzhi Liang ◽  
Qihuang Qin ◽  
Lujue Long ◽  
...  
Keyword(s):  
Control Group ◽  
Latarjet Procedure ◽  
Glenoid Defect ◽  
Coracoacromial Ligament ◽  
Intact Side ◽  
Arthroscopic Latarjet ◽  
Arthroscopic Latarjet Procedure ◽  
Preoperative Ct ◽  
Shoulder Scores

Abstract Background: Whether coracoacromial ligament (CAL) release during Latarjet procedure will increase superior instability of shoulder joint postoperatively remains controversial. This study aims to observe changes in the acromiaohumeral distance (AHD) of patients who underwent modified double-button Latarjet procedure and provide evidence to address the issue.Methods: A retrospective analysis was conducted among 155 patients who underwent modified double-button Latarjet procedure in our department from 2013 to 2015. Preoperative CT scan of bilateral shoulders were used for glenoid defect evaluation. CT scans were performed immediately after operation (PO 0) and during the follow-up at 6, 36, and 60 months postoperatively (POM) to observe the healing and remodeling of the graft, and AHD was measured. The intact sides were set as control group. VAS and objective shoulder scores, including ASES, ROWE, and Walch-Duplay scores, were recorded at each time point.Results: A total of 104 cases who met the criteria completed follow up. The average follow-up time was 62.6 ± 2.4 months. Compared with preoperative conditions, the function scores of the shoulders were significantly improved at the last follow-up. There were no statistical differences of the AHD values between bilateral shoulders preoperatively. The AHD values at PO 0 and POM 6 were significantly higher than those of intact side (p < 0.05). The AHD values at POM 36 and 60 were slightly higher than those of intact side and the differences were statistically significant (p < 0.05).Conclusions: The modified double-button Latarjet procedure not only offers satisfactory therapeutic effect but also will not cause obvious superior instability at the 5-year follow-up.

Immobilisation of Iron-Containing Materials onto Supporting Materials in Heterogeneous Fenton System: A Review

2014 ◽  
Vol 955-959 ◽  
pp. 569-580 ◽  
Author(s):  
Juan Chen
Keyword(s):  
Surface Area ◽  
Heterogeneous Fenton ◽  
Chemical Route ◽  
Advantages And Disadvantages ◽  
System A ◽  
Fenton Catalyst ◽  
Heterogeneous Fenton Catalyst ◽  
Supporting Materials ◽  
Fenton System

The purpose of this review is to aim a summary of the development in the use of different supports for the immobilisation of a heterogeneous Fenton catalyst, which areiron-containing materials. Various anchors and immobilisation methods that are universally employed to the remediation of wastewater are considered. Commonly, the immobilisation of a heterogeneous Fenton catalyst onto supportive material has chiefly been approved through one of two major routes; chemical route physical route or physical route. The advantages and disadvantages of various immobilisation methods to obtain a gigantic surface area iron-containing materials support is considered too.

Repair of an Anteroinferior Glenoid Defect by the Latarjet Procedure: Quantitative Assessment of the Repair by Computed Tomography

2010 ◽  
Vol 26 (8) ◽  
pp. 1021-1026 ◽  
Author(s):  
Michael E. Hantes ◽  
Aaron Venouziou ◽  
Konstantinos A. Bargiotas ◽  
Zafiria Metafratzi ◽  
Apostolos Karantanas ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Quantitative Assessment ◽  
Latarjet Procedure ◽  
Glenoid Defect

Fixation Strength of Pedicle and Cortical Lumbar Vertebral Screws after Laminectomy: A Cadaver Study

2018 ◽  
Vol 79 (04) ◽  
pp. 273-278
Author(s):  
Dai-Soon Kwak ◽  
Ho-Jung Cho ◽  
Ho Chang ◽  
Moon Park ◽  
In-Sung Kim ◽  
...  
Keyword(s):  
Lumbar Vertebrae ◽  
Pedicle Screws ◽  
Cadaver Study ◽  
Fixation Strength ◽  
Pullout Strength ◽  
Screw Insertion ◽  
Cortical Screw ◽  
Significant Difference ◽  
Midline Approach ◽  
Biomechanical Strength

Background and Study Aim Cortical screws were proposed as an alternative to the traditional pedicle screws. Diverse experimental results support the biomechanical superiority of cortical screws compared to pedicle screws. Laminectomy is often part of multilevel lumbar surgeries. Laminectomy might weaken the medial bony edge at the entry of the divergently oriented screw and, thereby, the screw purchase. This study investigated the biomechanical strength of lumbar cortical screw after laminectomy. Objective To compare the fixation strength of cortical screws and traditional pedicle screws after lumbar laminectomy. Material and Methods A total of 120 pedicles from 60 lumbar vertebrae of 12 cadavers (8 men, 4 women) were assessed. The mean age of the cadavers was 73.4 ± 6.2 years (range: 62–82 years). Using a posterior midline approach, we inserted the traditional pedicle screws into one and the cortical screws into the other side of each vertebra. Laminectomy was performed after screw insertion. Vertical pullout strength and toggle strength testing were performed to compare the fixation strength between the two sides. Results After laminectomy, the pullout strength of the cortical screws was 718.92 ± 340.76 N, and that of the pedicle screws was 625.78 ± 287.10 N (p = 0.183). The toggle strength of the cortical screws was 544.83 ± 329.97 N; that of the pedicle screws was 613.17 ± 311.70 N (p = 0.145). No significant difference was found in biomechanical strength between the two types of screws. Conclusion Despite laminectomy, lumbar cortical screws offers comparable pullout and toggle biomechanical strength as traditional pedicle screws.

Viscoelastic Strain Response (ViSR) Ultrasound in Pre-Clinical and Clinical Application

2013 ◽  
Author(s):  
Mallory R. Scola ◽  
Joe N. Kornegay ◽  
James F. Howard ◽  
Timothy C. Nichols ◽  
Caterina M. Gallippi
Keyword(s):  
Muscular Dystrophy ◽  
Time Constant ◽  
Acoustic Radiation ◽  
Biomechanical Model ◽  
Radiation Force ◽  
Imaging Method ◽  
Strain Response ◽  
Advantages And Disadvantages ◽  
Viscoelastic Strain ◽  
Coefficient Of Viscosity

Viscoelastic Strain Response (ViSR) ultrasound is a novel acoustic radiation force (ARF)-based imaging method that noninvasively interrogates the viscoelastic properties of tissue by measuring the relaxation time constant for constant stress in the Voigt biomechanical model. The time constant is defined as the ratio of coefficient of viscosity to elastic modulus, so ViSR differentiates tissue with disparate viscosities and elasticities. ViSR ultrasound is performed by delivering two successive ARF impulses to a single region of exciation (ROE) and tracking the micrometer-scale displacements induced by the propagating longitudinal waves. ViSR does not rely on transverse wave propagation, which can be disrupted and difficult to track in heterogeneous and/or geometrically complex media. Another advantage to ViSR ultrasound is a large axial range relative to conventional ARF Impulse (ARFI) ultrasound. In this overview, ViSR methods are discussed and demonstrated in calibrated viscoelastic tissue mimicking materials. ViSR ultrasound is then applied to differentiating fatty and fibrous deposition in muscle in a golden retriever muscular dystrophy (GRMD) dog model and in boys with Duchenne muscular dystrophy (DMD) with correlation to standard physical testing. ViSR is also applied to delineating the structure and composition of atherosclerotic plaques in a hypercholesterolemic pig model with histochemical validation. ViSR’s key advantages and disadvantages are discussed in regard to its general clinical utility.

Mini-Open Arthroscopically Assisted Bristow-Latarjet Procedure for the Treatment of Patients With Anterior Shoulder Instability: A Cadaver Study

2006 ◽  
Vol 22 (10) ◽  
pp. 1113-1118 ◽  
Author(s):  
Geoffroy Nourissat ◽  
Guillaume Nedellec ◽  
Niamh A. O’Sullivan ◽  
Aurore Debet-Mejean ◽  
Christian Dumontier ◽  
...  
Keyword(s):  
Shoulder Instability ◽  
Cadaver Study ◽  
Anterior Shoulder Instability ◽  
Latarjet Procedure ◽  
Arthroscopically Assisted ◽  
Mini Open

scholarly journals A study to compare strengths of cadaveric tendon repairs with round-bodied and cutting needles

2021 ◽  
pp. 175319342110642
Author(s):  
Gino Vissers ◽  
Wan M. R. Rusli ◽  
Alexander Scarborough ◽  
Maxim D. Horwitz ◽  
Gordon J. McArthur ◽  
...  
Keyword(s):  
Failure Load ◽  
Flexor Tendon ◽  
Tendon Repair ◽  
Cadaver Study ◽  
Human Cadaver ◽  
Flexor Tendon Repair ◽  
Pull Out ◽  
Mode Of Failure ◽  
Traction Testing ◽  
Human Cadaver Study

This human cadaver study investigated whether flexor tendon repairs performed with round-bodied needles had a higher risk of pull-out compared with those performed with cutting needles. Forty human cadaver tendons were repaired (20 with each type of needle), subjected to tensile traction testing and evaluated by failure load and mode of failure. The average failure load was 50 N (SD 13 N) for tendons repaired with round-bodied needles, compared with 49 N (SD 16 N) for tendons repaired with cutting needles. Round-bodied needles resulted in more suture pull-out (18 out of 20 tendons) than cutting needles (6 out of 20 tendons). We found no differences in failure load, but significant differences in the mode of failure between round-bodied and cutting needles when used for cadaveric flexor tendon repair.

Sign in / Sign up

Export Citation Format

Share Document