Congruent-arc Latarjet Procedure Research Articles

Distal Clavicle Autograft Versus Traditional and Congruent Arc Latarjet Procedures: A Comparison of Surface Area and Glenoid Apposition With 3-Dimensional Computed Tomography and 3-Dimensional Magnetic Resonance Imaging

Background: Limited studies have compared graft-glenoid apposition and glenoid augmentation area between the Latarjet procedure and distal clavicle graft in glenohumeral stabilization. Additionally, preoperative planning is typically performed using computed tomography (CT), and few studies have used 3-dimensional (3D) magnetic resonance imaging (MRI) reformations to assess graft dimensions. Purpose: The purpose of this study was 2-fold: (1) to compare bony apposition, glenoid augmentation, and graft width among coracoid and distal clavicle bony augmentation techniques and (2) to determine the viability of 3D MRI to assess bone graft dimensions. Study Design: Controlled laboratory study. Methods: A total of 24 patients with recurrent glenohumeral instability and bone loss were included in this study. 3D CT and 3D MRI reformations were utilized to measure pertinent dimensions for 5 orientations of coracoid and distal clavicle autografts: (1) standard Latarjet procedure (SLJ), (2) congruent arc Latarjet procedure (CLJ), (3) distal clavicle attached by its posterior surface (DCP), (4) distal clavicle attached by its inferior surface (DCI), and (5) distal clavicle attached by its resected end (DCR). Glenoid augmentation was defined as the graft surface area contributing to the glenoid. Bone-on-bone apposition was defined as the graft-glenoid contact area for bone healing potential, and graft width was pertinent for fixation technique. Glenoid bone loss ranged from 0% to 34%. Paired t tests were used to compare graft sizes between patients and compare 3D CT versus 3D MRI measurements. Results: The CLJ had the largest graft surface area (mean, 318.41 ± 74.44 mm2), while the SLJ displayed the most bone-on-bone apposition (mean, 318.41 ± 74.44 mm2). The DCI had the largest graft width (mean, 20.62 ± 3.93 mm). Paired t tests revealed no significant differences between the Latarjet techniques, whereas distal clavicle grafts varied significantly with orientation. All 3D CT and 3D MRI measurements were within 1 mm of each other, and only 2 demonstrated a statistically significant difference (coracoid width: 13.03 vs 13.98 mm, respectively [P = .010]; distal clavicle thickness: 9.69 vs 10.77 mm, respectively [P = .002]). 3D CT and 3D MRI measurements demonstrated a strong positive correlation (r > 0.6 and P < .001 for all dimensions). Conclusion: Glenoid augmentation, bony apposition, and graft width varied with coracoid or distal clavicle graft type and orientation. Differences between 3D CT and 3D MRI were small and likely not clinically significant. Clinical Relevance: 3D MRI is a viable method for preoperative planning and graft selection in glenoid bone loss.

The congruent arc latarjet procedure – Its functional outcomes in recurrent anterior shoulder dislocation with critical glenoid bone loss

Background: Recurrent shoulder dislocation leading to shoulder instability is a cumbersome clinical problem for patients and orthopedicians. Due to a lack of knowledge in young patients of developing countries, there is a delay in presentation from the first time of dislocation. The aim of this retrospective study was to evaluate the functional and radiographic outcomes of patients with shoulder instability after the Congruent Arc Latarjet procedure. Methods: From January 2018 to November 2021, 20 patients with history of recurrent shoulder dislocation having glenohumeral instability were treated surgically in our institute. Open Congruent Arc Latarjet procedure was performed in 20 patients. Functional outcomes were assessed preoperatively and postoperatively based on American Shoulder and Elbow Surgeons (ASES) score, the visual analog scale (VAS) for pain, ROWE score, and Active range of motion in the diseased shoulder. Results: Twenty shoulders of 20 patients were evaluated for a mean period of 24 months postoperatively. At the time of the latest consultation, the range of motion and the shoulder functional evaluations based on ROWE score which was 89.64 ± 5.71 (range 80–95) improved from 20.36 ± 8.87 (range 10–30), p = 0.001. The mean preoperative ASES score was 22.60 ± 1.09 (range 20.6–25) which improved to 72.50 ± 7.33 (range 52.8–77.2), p = 0.001, which is definitely improved. The overall re-dislocation rate was 0% (0 of 20). In our study, 60% had excellent outcomes, 30% had good outcomes, and 10% had fair outcomes. Conclusion: The Congruent Arc Latarjet procedure for the treatment of recurrent shoulder dislocation with glenoid bone loss of &gt;20% is a successful and efficient method with better outcomes in daily work profile and no further episode of redislocation.

A cadaveric morphometric analysis of coracoid process with reference to the Latarjet procedure using the "congruent arc technique".

Congruent arc Latarjet procedure involves rotating the coracoid process so that its inferior surface is flush with the glenoid face, owing to their matching radius of curvature (ROC). However, there has been no cadaveric study to actually measure and compare the ROC of coracoid with glenoid, especially in Indian population. 44 shoulders were dissected in 24 cadavers to measure usable length of coracoid process, width, height, ROC of coracoid and glenoid as well as ulnar length (as proxy of cadaver height). Critical coracoid height and length were estimated based on screw sizes of 2.7mm, 3.5mm, 4mm and 4.5mm, and pair concordance between height and length calculated. ROC of coracoid and glenoid were compared to measure extent of congruency. The mean usable length of coracoid process, width and height at mid-point were 21.8mm, 13.7mm and 8.6mm, respectively. Out of the different screw sizes, 2.7mm screws were found safe in 82% shoulders. 24 coracoid-glenoid pairs fulfilled the operational definition (≤ 5mm) of congruency while rest 20 were seemingly incongruent chiefly due to coracoid variations, with mean ROC difference 4.13mm (95% CI 1.51-6.74mm). The ulnar length was significantly smaller in the incongruent ROC group (p = 0.0002). The available length as well as height of the transferred coracoid must be considered when deciding optimum diameter fixation screws in Latarjet procedure. Owing to smaller anatomic dimensions of coracoid in Indian population, 2.7-mm screws provide the safest fixation option. Also, the ROC of coracoid and glenoid does not match in substantial proportion of the cadavers. Pre-operative planning should include a CT-based assessment of glenoid and coracoid dimensions to decide the technique of Latarjet procedure and the optimum diameter fixation screws required.

Relationship between the Thickness of the Coracoid Process and Latarjet Graft Positioning-An Anatomical Study on 70 Embalmed Scapulae.

Background: The Latarjet procedure is a popular technique with the aim of the reconstruction of glenoid cavity bone defects in patients with chronic anterior shoulder instability. Studies have shown that the Congruent arc Latarjet procedure is better able to reconstruct larger defects than the Classic Latarjet, but there is a lack of information on the limitations of both methods. Methods: The dimensions of the glenoid width and the native coracoid process of two groups with 35 Formol-Carbol embalmed scapulae each were measured using a digital caliper. The relationship between the coracoid graft and the anterior-posterior diameter of the glenoid cavity was calculated to determine the maximum defect size of the glenoid cavity width, which can be treated by both Latarjet techniques. Results: The average restorable defect size of the anterior segment of the glenoid cavity was 28.4% ± 4.6% (range 19.2%–38.8%) in the Classic Latarjet group, and 45.6% ± 5.2% (range 35.7%–57.1%) in the Congruent arc Latarjet group. Based on our results, the feasibility of the Classic Latarjet procedure to reconstitute the anatomical width of the glenoid cavity was 86% in a 25% bone loss scenario, and only 40% in a 30% bone loss scenario. Conclusion: Based on our results we are unable to define a clear threshold for the optimal Latarjet graft position. In glenoid cavity defects <20%, the Classic Latarjet technique usually provides enough bone stock for anatomical reconstruction. Defects ≥35% of the glenoid cavity width should only be treated with a coracoid graft in the Congruent arc position. In the critical area between 20% and 35% of bone loss, we suggest the preoperative assessment of coracoid dimensions, based on which the graft position can be planned to restore the anatomical anterior-posterior diameter of the glenoid cavity.

Bone defect–induced alteration in glenoid articular surface geometry and restoration with coracoid transfer procedures: a cadaveric study

This study analyzed the alteration in glenoid articular geometry with increasing anterior bone loss, as well as its subsequent correction with 2 modifications of the Latarjet procedure. Anterior defects were simulated by creating glenoid osteotomies (10%, 20%, 30%, and 40%), and defects were reconstructed using 2 Latarjet modifications (classic and congruent arc). A total of 108 computed tomography scans were performed (1) on intact scapulae (n = 12), (2) after each bone defect (n = 48), and (3) after each reconstruction (n = 48). Glenoid parameters (width, area, arc length, and version) were analyzed on computed tomography scans. Statistical analysis was used to determine significant differences between intact, deficient, and reconstructed glenoids. All parameters were reduced with every 10% defect increment (mean change in width, 2.5 mm; area, 64 mm2; version, 2.2°; and arc length, 2.2 mm). Width correction with the classic Latarjet procedure was not statistically significant in 30% and 40% defects. Area correction in 30% defects was not significant with the classic Latarjet procedure and was significantly undercorrected in 40% defects. Version correction was not significant after the classic Latarjet procedure in 20%, 30%, and 40% defects. Arc-length correction was not significant in 20% and 30% defects with the classic Latarjet procedure and was significantly undercorrected in 40% defects. The congruent-arc Latarjet procedure overcorrected glenoid parameters in all defects; however, area and arc length were not significantly different from intact glenoids in 40% defects (P < .05). Glenoid articular geometry is progressively altered with a sequential increase in anterior bone defects from 0% to 40%. The classic Latarjet procedure provided significant correction in bone defects of 10% and 20%. The congruent-arc Latarjet procedure restored and overcorrected most parameters even in 40% glenoid defects.

Comparison Between Modified Latarjet Performed as a Primary or Revision Procedure in Competitive Athletes: A Comparative Study of 100 Patients With a Minimum 2-Year Follow-up.

Background:The literature lacks evidence comparing outcomes between the Latarjet procedure performed as a primary procedure versus a revision procedure in competitive athletes.Purpose:To compare return to sport, functional outcomes, and complications of the modified Latarjet performed as a primary or revision procedure in competitive athletes.Study Design:Cohort study; Level of evidence, 3.Methods:Between June 2008 and June 2015, a total of 100 competitive athletes with recurrent anterior shoulder instability underwent surgery with the congruent arc Latarjet procedure without capsulolabral repair. There were 46 patients with primary repairs and 54 with revisions. Return to sport, range of motion (ROM), the Rowe score, a visual analog scale (VAS) for pain in sport activity, and the Athletic Shoulder Outcome Scoring System (ASOSS) were used to assess functional outcomes. Recurrences were also evaluated. The postoperative bone block position and consolidation were assessed by computed tomography.Results:The mean follow-up period was 58 months (range, 24-108 months). A total of 96 patients (96%) returned to competitive sports; 91% returned to their preinjury level of play. No significant difference in shoulder ROM was found between preoperative and postoperative results. The Rowe, VAS, and ASOSS scores showed statistically significant improvements after surgery (P < .001). The Rowe score increased from a preoperative mean of 43.8 to a postoperative mean of 96.1 (P < .01). Subjective pain during sports improved from a preoperative VAS score of 3.3 to a postoperative score of 1.2 (P < .01). The ASOSS score improved significantly from a preoperative mean of 46.3 to a postoperative mean of 88.1 (P < .001). No significant differences in shoulder ROM and functional scores were found between patients who underwent a primary versus a revision procedure. No recurrence of shoulder dislocation or subluxation was noted. The bone block healed in 91 patients (91%).Conclusion:In competitive athletes with recurrent anterior glenohumeral instability, the modified Latarjet procedure produced excellent functional outcomes, with most athletes returning to sport at the same level they had before surgery and without recurrence, regardless of whether the surgery was performed as a primary or a revision procedure.

Modified Latarjet Without Capsulolabral Repair in Rugby Players With Recurrent Anterior Glenohumeral Instability and Significant Glenoid Bone Loss

Background: The optimal management of recurrent anterior shoulder instability with significant glenoid bone loss in high-demand collision athletes remains a challenge. Purpose: To analyze the time to return to sport, clinical outcomes, and recurrences following a modified Latarjet procedure without capsulolabral repair in rugby players with recurrent anterior shoulder instability and significant glenoid bone loss. Study Design: Case series; Level of evidence, 4. Methods: Between June 2008 and June 2015, 50 competitive rugby players (practice >2 times per week and competition during weekends) with recurrent anterior shoulder instability underwent operation with the modified congruent arc Latarjet procedure without capsulolabral repair in our institution. Cases included 18 primary repairs and 32 revisions. Return to sports, range of motion (ROM), the Rowe score, a visual analog scale for pain in sport activity (VAS), and the Athletic Shoulder Outcome Scoring System (ASOSS) were used to assess functional outcomes. Recurrences were also evaluated. The postoperative bone block position and consolidation were assessed with computed tomography. The final analysis included 49 shoulders in 48 patients (31 revision cases). Results: The mean follow-up was 48 months (range, 24-108 months) and the mean age at the time of operation was 22.8 years (range, 17-35 years). Forty-five patients (93.7%) returned to playing rugby, all at their preinjury level of play. No significant difference in shoulder ROM was found between preoperative and postoperative results. The Rowe, VAS, and ASOSS scores showed statistically significant improvement after operation (P < .001). The Rowe score increased from a mean of 39.5 points preoperatively to 94 points postoperatively (P < .01). The VAS score decreased from 3.6 points preoperatively to 1.2 points postoperatively (P < .01). The ASOSS score improved significantly from a mean of 44 points preoperatively to 89.5 points postoperatively (P < .01). No recurrence of shoulder dislocation or subluxation was noted. The bone block healed in 43 shoulders (88%). Conclusion: In rugby players with recurrent anterior shoulder instability and significant glenoid bone loss, the modified Latarjet procedure without capsulolabral repair produced excellent functional outcomes, with most athletes returning to rugby at their preinjury level of play without recurrences.

Latarjet Technique for Treatment of Anterior Shoulder Instability With Glenoid Bone Loss

Anterior glenohumeral instability is a common clinical entity, particularly among young athletic patient populations. Nonoperative management and arthroscopic treatment of glenohumeral instability have been associated with high rates of recurrence, particularly in the setting of glenohumeral osseous defects. Coracoid transfer, particularly the Latarjet procedure, has become the treatment of choice for recurrent anterior glenohumeral instability in the setting of osseous deficiencies greater than 20% to 30% of the glenoid surface area and may also be considered for the primary treatment of recurrent instability in the high-risk contact athlete, even in the setting of limited osseous deficiency. The following Technical Note provides a diagnostic approach for suspected glenohumeral instability, as well as a detailed description of the congruent-arc Latarjet procedure, performed with a deltoid split, with its postoperative management.

Evaluation of functional outcomes and complications following modified Latarjet reconstruction in athletes with anterior shoulder instability.

The optimal management of anterior shoulder instability in athletes continues to be a challenge. The present study aimed to evaluate the functional outcomes of athletes with anterior shoulder instability following modified Latarjet reconstruction through assessing the timing of return to sport and complications. Retrospective assessment was performed of athletes (n = 56) who presented with recurrent anterior shoulder instability and were treated with modified congruent arc Latarjet reconstruction over a 1-year period. Rugby union was the predominant sport performed. Pre-operative instability severity index scores were assessed. Postoperative complications were recorded as was the time taken for the athlete to return to sport. Arthroscopic evaluation revealed that 86% of patients had associated bony lesions affecting the glenohumeral joint. The overall complication rate relating to the Latarjet reconstruction was 7%. No episodes of recurrent shoulder instability were noted. Of the patients, 89% returned to competitive sport at the same level as that prior to surgery. The mean time post surgery to returning to full training was 3.2 months. The modified congruent arc Latarjet procedure facilitates early rehabilitation and return to sport. These results support our systematic management protocol of performing modified Latarjet surgery in contact sport athletes with recurrent anterior instability.

Latarjet procedure in patients with multiple recurrent anterior shoulder dislocation and generalized ligamentous laxity.

Patients with generalized hyperlaxity with frank recurrent anterior shoulder dislocation had high failure rate after conservative and soft tissue stabilization procedures. Our hypothesis is that a Latarjet procedure can provide an alternative successful approach to manage such cases. This prospective study was conducted on 13 patients with multiple recurrences of anterior shoulder dislocation. The mean age was 24.4 years. They all had generalized ligamentous laxity according to Beighton's scale with a mean score of six points. Hill-Sach's lesion was <20 % of the head diameter with no glenoid defect; otherwise, the case was not included in the study. The modification of Burkhart and de Beer "congruent-arc Latarjet procedure" was performed for all patients through a limited deltopectoral approach. Re-dislocation occurred in one case only over the follow-up period. It occurred once after a violent act. Their preoperative mean Rowe score was 47.5 points preoperatively and increased to 91.07 postoperatively. This improvement was statistically highly significant (p value <0.001). The mean range of postoperative external rotation was 69.29°. Latarjet procedure provides a higher success rate in such patients with multiple recurrences regarding both shoulder stability and function compared to capsulolabral repair procedures. IV.

Dual-window Subscapularis-sparing Approach

Combined bankart lesion and humeral avulsion of glenohumeral ligament lesion (HAGL) is a well-described pathologic complex in anterior shoulder instability; open surgical approaches with and without arthroscopic assistance have been suggested for simultaneous 1-stage repair of these lesions. Presence of a significant glenoid bone defect (inverted-pear glenoid) adds to the complexity of the problem and necessitates a bony reconstruction procedure. Open surgical approaches described for management of this combined lesion complex in anterior shoulder instability necessitate a subscapularis-cutting approach; suboptimal healing of the tenotomized subscapularis and subsequent delayed rehabilitation predisposes to late subscapularis dysfunction, and this compromises clinical outcomes. This study describes a new surgical technique that utilizes a dual-window approach through the subscapularis muscle; the dual window enables access to the glenoid and humeral lesions without the need for a subscapularis tenotomy. The approach can be used to perform a congruent-arc Latarjet procedure (for glenoid bone defects) or a Bankart repair (for capsulolabral lesions), in combination with a HAGL repair. Preliminary arthroscopy is essential to identify significant bone defects and HAGL lesions. The dual-window approach for reconstruction of the lesions involves (1) a lateral "subscapularis-sparing" window to identify and repair the HAGL lesion; (2) a medial "subscapularis muscle-splitting" window to perform either a glenoid capsulolabral reconstruction or a congruent-arc Latarjet procedure; and (3) a balanced inferior capsular shift and lateralization procedure of the glenohumeral capsule. Technical tips and guidelines to avoid complications are discussed, and a rehabilitation protocol is presented.

An Anatomic, Computed Tomographic Assessment of the Coracoid Process With Special Reference to the Congruent-Arc Latarjet Procedure

The purpose of this study was to determine the dimensions of the coracoid and to compare the radius of curvature (ROC) of the intact glenoid to the ROC of the coracoid undersurface, as oriented in the congruent-arc Latarjet procedure. The ROC of the coracoid undersurface was also compared with various glenoid bone loss scenarios. Thirty-four computed tomography-based 3-dimensional models of the shoulder were examined by use of commercially available software. The mean dimensions of the coracoid were determined, and the ROC was calculated for the coracoid undersurface, the intact glenoid, and 20%, 35%, and 50% anterior glenoid bone loss scenarios. Intra-rater and inter-rater statistics were calculated. The mean length, width, and thickness of the coracoid were 16.8 mm (SD, 2.5 mm), 15.0 mm (SD, 2.2 mm), and 10.5 mm (SD, 1.7 mm), respectively. The mean ROC values were 13.6 mm (SD, 3.4 mm) for the coracoid, 13.8 mm (SD, 2.1 mm) for the intact glenoid, 27.6 mm (SD, 5.3 mm) for 20% anterior glenoid bone loss, 30.5 mm (SD, 5.2 mm) for 35% bone loss, and 33.3 mm (SD, 5.2 mm) for 50% bone loss. The coracoid ROC was not significantly different from the intact glenoid (P = .75); however, it was significantly less (P < .01) when compared with all glenoid bone loss scenarios. Intra-rater reliability and inter-rater reliability were good or excellent. A coracoid oriented in the congruent-arc manner can reconstitute a significantly greater glenoid bone defect than a coracoid oriented in the classic manner (P < .001). This image-based anatomic study found that the ROC of the coracoid undersurface matches the ROC of the intact anterior glenoid articular margin. In conditions with anterior glenoid bony deficiency, the radii of curvature differ significantly at the graft-native glenoid interface; however, the coracoid graft placed in the congruent-arc manner reconstitutes the ROC of the missing anterior glenoid rim. In addition, orienting the coracoid in the congruent-arc manner can reconstitute a greater glenoid bone defect than a coracoid placed in the original manner as described by Latarjet. The congruent-arc Latarjet procedure, a modification of the original procedure, is truly congruent in relation to the intact anterior glenoid rim. In addition, the congruent-arc modification can reconstitute a greater glenoid bone defect when compared with the original Latarjet procedure.