shoulder angle
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PURPOSE OF THE STUDY: The critical shoulder angle (CSA) is formed by the combination of glenoid inclination and acromial index and has been shown related to rotator cuff tears and glenohumeral osteoarthritis. SLAP lesions today have an important place among bicipitolabral pathologies that cause intensive shoulder pain. We aimed to investigate the relationship between CSA and glenoid depth and SLAP lesions. MATERIAL AND METHODS: Between March 2017 and January 2022, 279 consecutive shoulder arthroscopy patients' MRI images were retrospectively examined. After the exclusion criteria, 191 patients were eligible. Patients with SLAP lesions (n=37) were assembled as the study group (Group 1), and patients with intact superior labrum (n=154) were named as the control group (Group 2). Critical shoulder angle (CSA) and glenoid depth measurements were performed using the preoperative MRI images. RESULTS: A total of 191 patients, of whom 84 were male (44%) were included. The mean age was 49.9±14.96 (range 18-79). There was a statistically signifi cant difference between the SLAP group (Group 1) and the control group (Group 2) in terms of CSA (p=0.032). The mean CSA was 31.66°±3.51° in Group 1 and 33.57° ±5.01° in Group 2. The cut-off value for CSA in patients with SLAP lesions was calculated as 32.85° and the area under the curve was 0.61, therefore a satisfactory association was observed between the groups. The mean glenoid depth was 4.32 ±1.25 mm in Group 1, and 4.39 ±0.32 mm in Group 2. There was no statistically signifi cant difference between the groups in terms of glenoid depth (p=0.136) and also no association between the glenoid depth and SLAP lesions was observed (cut-off=4.45 mm, AUC=0.32). CONCLUSIONS: Low CSA is associated with SLAP lesions, just as in glenohumeral osteoarthritis. Further prospective clinical studies are needed to enlighten the predisposing effect of CSA to SLAP lesions and the success of superior labral repairs. LEVEL OF EVIDENCE: Retrospective comparative study, Level III.
- MeSH
- akromion MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- lopatka MeSH
- osteoartróza * diagnostické zobrazování chirurgie MeSH
- rameno * MeSH
- retrospektivní studie MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
Based on electromyographic data and force measurements within the shoulder joint, there is an indication that muscle and resulting joint reaction forces keep increasing over an abduction angle of 90°. In inverse dynamics models, no single parameter could be attributed to simulate this force behaviour accordingly. The aim of this work is to implement kinematic, kinetic and muscle model modifications to an existing model of the shoulder (AnyBody™) and assess their single and combined effects during abduction up to 140° humeral elevation. The kinematics and the EMG activity of 10 test subjects were measured during humeral abduction. Six modifications were implemented in the model: alternative wrapping of the virtual deltoid muscle elements, utilization of a three element Hill model, strength scaling, motion capture driven clavicle elevation/protraction, translation of the GH joint in dependency of the acting forces and an alteration of the scapula/clavicle rhythm. From the six modifications, 16 different combinations were considered. Parameter combinations with the Hill model changed the resultant GH joint reaction force and led to an increase in force during abduction of the humerus above 90°. Under the premise of muscle activities and forces within the GH joint rising after 90° of humeral abduction, we propose that the Hill type muscle model is a crucial parameter for accurately modelling the shoulder. Furthermore, the outcome of this study indicates that the Hill model induces the co-contraction of the muscles of the shoulder without the need of an additional stability criterion for an inverse dynamics approach.
- MeSH
- biomechanika MeSH
- humerus MeSH
- lidé MeSH
- lopatka MeSH
- ramenní kloub * MeSH
- rameno * MeSH
- rozsah kloubních pohybů MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Úvod: Cílem tohoto článku je na základě 3D CT rekonstrukcí popsat anatomii zlomenin dolního úhlu a přilehlé části těla lopatky. Metoda: V souboru 375 zlomenin lopatky jsme identifikovali celkem 20 zlomenin dolního úhlu těla lopatky (13 mužů, 7 žen), průměrného věku 50 let (33−73 roků). U všech zlomenin byly provedeny 3D CT rekonstrukce umožňující objektivní zhodnocení typu zlomeniny. Sledovali jsme velikost a tvar fragmentu dolního úhlu, propagaci lomné linie do laterálního a mediálního okraje infraspinátní části těla lopatky, dislokaci úlomků případné další zlomeniny stejné lopatky a ramenního pletence. Výsledky: Identifikovali jsme celkem 5 typů zlomenin postihujících distální polovinu infraspinální části těla. První typ, který jsme zaznamenali v 5 případech, postihoval pouze apex dolního úhlu s malou částí přilehlého mediálního okraje. Druhý typ představovaly zlomeniny oddělující celý dolní úhel. Identifikovány byly 4 případy. Třetí typ, zastoupený 4 případy, byl charakterizován lomnou linií začínající mediální těsně nad dolním úhlem a směřující proximolaterálně. Odlomený fragment tak získal podobu velké kapky, která kromě dolního úhlu nesla distální polovinu laterálního pilíře. U čtvrtého typu tvořil odlomený fragment nejen dolní úhel, ale i variabilní část mediálního okraje. Zaznamenáno bylo 5 zlomenin. Pátý typ představoval přechod ke zlomenině infraspinátní části těla. Ve 2 zaznamenaných případech byl tvar fragmentu stejný, tj. měl tvar písmena „V“. Závěr: Zlomeniny dolního úhlu a přilehlé části těla lopatky představují skupiny zlomenin odlišnou od ostatních infraspinátních zlomenin těla lopatky. Ačkoli zlomeniny dolního úhlu vykazují značnou tvarovou variabilitu, spojuje je průběh lomné linie v laterálním okraji těla a způsob dislokace.
Introduction: The aim of this study is to describe the anatomy of fractures of the inferior angle and the adjacent part of the scapular body, based on 3D CT reconstructions. Method: In a series of 375 scapular fractures, we identified a total of 20 fractures of the inferior angle of the scapular body (13 men, 7 women), with a mean patient age of 50 years (range 33−73). In all fractures, 3D CT reconstructions were obtained, allowing an objective evaluation of the fracture pattern with a focus on the size and shape of the inferior angle fragment, propagation of the fracture line to the lateral and medial borders of the infraspinous part of the scapular body, fragment displacement and any additional fracture of the ipsilateral scapula and the shoulder girdle. Results: We identified a total of 5 types of fracture involving the distal half of the infraspinous part of the scapular body. The first type, recorded in 5 cases, affected only the apex of the inferior angle, with a small part of the adjacent medial border. The second type, occurring in 4 cases, involved fractures separating the entire inferior angle. The third type, represented by 4 cases, was characterized by a fracture line starting medially close above the inferior angle and passing proximolaterally. The separated fragment had a shape of a big drop, carrying also the distal half of the lateral pillar in addition to the inferior angle. In the fourth type identified in 5 fractures, the separated fragment was formed both by the inferior angle and a variable part of the medial border. The fifth type, being by its nature a transition to the fracture of the infraspinous part of the body, was recorded in 2 cases, with the same V-shaped fragment. Conclusion: Fractures of the inferior angle and the adjacent part of the scapular body are groups of fractures differing from other infraspinous fractures of the scapular body. Although these fractures are highly variable in terms of shape, they have the same course of fracture line and the manner of displacement.
- MeSH
- dislokace kloubu diagnóza chirurgie MeSH
- fixace fraktury MeSH
- fraktury kostí * chirurgie klasifikace MeSH
- lidé MeSH
- lopatka * anatomie a histologie diagnostické zobrazování zranění MeSH
- ortopedické výkony MeSH
- počítačová rentgenová tomografie MeSH
- vnitřní fixace fraktury MeSH
- zobrazování trojrozměrné MeSH
- Check Tag
- lidé MeSH
PURPOSE OF THE STUDY: The aim of arthroscopic Bankart repair is restoration of the anterior block mechanism and regaining stability. There are few studies that have tested the adequacy of the angle made with the glenoid and the height from the glenoid level of the repaired labral tissue, but the correlation with the clinical results is not clear. The aim of this study was to defi ne the correlation of the height and slope of the repaired labral tissue in the glenoid anterior with the clinical results. MATERIAL AND METHODS This prospective study included 20 patients who underwent an arthroscopic Bankart repair. To evaluate the labrum anatomy of the affected shoulder, 4 measurement parameters were defi ned as axial height (Ah), axial slope (As), oblique coronal height (Ch), and oblique coronal slope (Cs) on non-contrast T2 MRI. The measurements were taken preoperatively of the affected shoulder and at 1 year postoperatively of both the affected shoulder and the contralateral asymptomatic shoulder. The measured values were compared with each other and with the contralateral shoulder. Correlations of the anatomic values with the Constant-Murley scores recorded at 1, 3, 6, and 12 months postoperatively were examined with the Wilcoxon test. RESULTS The mean preoperative Constant score of the patients was 57.7 (32-77) and postoperative scores at 1, 3, 6, and 12 months were 63.6 (44-79), 77.8 (61-90), 89.6 (77-100), and 95.2 (79-100), respectively (p=0.001). There was a statistically signifi cant difference in the preoperative MRI measurements of the axial and oblique coronal plane labral height and slope values compared to the postoperative values and those of the asymptomatic contralateral shoulder (p< 0.05 for all). There was no statistically signifi cant difference between the labral height and slope values of both planes postoperatively compared to the asymptomatic contralateral shoulder (p= 0.776, p= 0.910, p= 0.132, p= 0.589, respectively). These increases in the radiological data were not found to be statistically signifi cant in the correlation analysis with the increases in the Constant-Murley scores (Ah p=0.935, As p=0.587, Ch p=0.078, Cs p=0.105). CONCLUSIONS This prospective study was conducted using conventional T2 magnetic resonance imaging, which was suffi cient for the measurement of labral height and slope. This study results showed no signifi cant correlation between the radiological and clinical outcomes. KEY WORDS: Bankart repair, labrum height, labrum slope, functional result.
To evaluate and compare proximal humeral fractures treated either by plate osteosynthesis with angular-stable screws or by intramedullary nailing, and to define the indications optimal for use of either technique. MATERIAL: The study comprised 97 patients. The proximal humeral internal locking system (PHILOS) plate was used in 49 patients (31 women and 18 men); with age average 57.4 years (women, 64.5 and men, 45.3 years). By the AO classification, 12 patients with type A, 15 with type B, and 22 with type C fractures. The Targon PH nail was used in 48 patients (32 women and 16 men) at an average age of 65.3 years (women, 72.2 and men, 51.4 years). Type A fractures were in 18, type B in 18 and type C in 12 patients. METHODS: The patients were prospectively evaluated and placed into the two groups.The post-operative range of motion was assessed by the Constant-Murley (CM) score at 6 weeks, and at 3, 6 and 12 months. The CM value was related to the healthy collateral limb and recorded as a relative CM score. RESULTS In the PHILOS group, the average values were: operative time, 76.2 min; X-ray exposure, 4.2 min; and relative CM score, 74.5 points. The Targon PH group showed the average operative time of 50.2 min., X-ray exposure for 4 min. and the relative CM score 78.3 points. There were no significant differences between the groups, with the exception of shorter operative time in intramedullary nailing. DISCUSSION: Nailing is the method of choice for two-fragment fractures. In comminutive metaphyseal fractures particularly, the use of nailing is more effective than plate osteosynthesis that carries the risk of plate detachment from the diaphysis. In fractures with a long fracture line extending into the metaphysis, plate osteosynthesis with open reduction is a better option. The results in three-fragment fractures are comparable and the choice of an implant is the matter of surgeon's preference. The standard technique for four-fragment fractures involves the use of angular-stable plate fixation through the deltoid- pectoral approach. Intramedullary nailing is a borderline indication requiring a modified surgical procedure, with tubercles being fixed with osteosuture. CONCLUSIONS: No statistically significant differences in functional results occurred between the observed groups at one year of followup. In four-fragment proximal humerus fractures, the patients treated with Targon PH nails had more complications and worse relative CM scores than those treated with PHILOS plates; however, this was not statistically significant and the number of complications decreased after the technique of tubercle osteosuture had been introduced. Finally, the only significant difference between the groups was a shorter operative time with the use of intramedullary nailing.
OBJECTIVE: The aim of this study is to determine normal glenopolar angle (GPA) values on bone specimens of the scapula and compare them with various radiological views and CT examination. MATERIALS AND METHODS: GPA values were measured on 100 mature, dry, non-paired scapulae, 20 pairs of dry scapulae, 50 AP radiographs of the shoulder, 50 Neer I views, 50 AP chest radiographs and 20 3D CT reconstructions of the scapula. RESULTS: Measurements made on bone specimens of the scapula showed an average GPA value of 42.3°; the mean absolute side-to-side difference was on average 1.6°. The average GPA measured on 50 AP shoulder radiographs was 35.9°, on Neer I views 40.6° and AP chest radiographs 37.1°, with the mean absolute side-to-side difference on average 4.9°; on 3D CT the average GPA was 43.0° and the mean absolute side-to-side difference on average 1.4°. CONCLUSION: GPA values depend on the method of measurement used. Measurements made on 3D CT reconstructions and Neer I views showed almost the same values as those measured on bone specimens. The values measured on AP shoulder views and AP chest radiographs were statistically significantly lower. Side-to-side variability (right and left) measured on 3D CT reconstructions was insignificant, and the obtained values corresponded to the values from bone specimens. Therefore, the best method to measure the GPA is a 3D CT reconstruction and an exact Neer I projection.
- MeSH
- anatomické modely * MeSH
- kloubní artrometrie metody MeSH
- kloubní jamka lopatky anatomie a histologie radiografie MeSH
- lidé MeSH
- mrtvola MeSH
- počítačová rentgenová tomografie metody MeSH
- referenční standardy MeSH
- reprodukovatelnost výsledků MeSH
- senzitivita a specificita MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
PURPOSE: The objective of the study was to provide statistical evaluation of position of bone landmarks of proximal humerus in relation to transepicondylar line and find out which one is the most suitable for setup of the head retroversion in case of humeral head destruction. METHODS: We measured 185 dry humeral preparations (92 left, 93 right). Structures of interest on the proximal humerus were marked with pointers of custom made steel frame. Angular relationships between the humeral head axis and medial margin of the greater tuberosity, lateral margin of the lesser tuberosity, bicipital groove, and crest of the greater tuberosity were evaluated with respect to intramedullary axis of the proximal humeral shaft. RESULTS: The angle between the humeral head axis and medial margin of greater tuberosity was 11.5 +/- 9.0 degrees , the angle between the lateral margin of the lesser tuberosity and the axis was 47.5 +/- 7.4 degrees , the angle between the bicipital groove and the axis was 31.6 +/- 8.8 degrees at the level of the humeral head. The angle between the crest of the greater tuberosity and the axis was 26.6 +/- 9.6 degrees in plane of the surgical neck. CONCLUSIONS: We statistically proved that the lateral margin of lesser tuberosity is more reliable than the bicipital groove; medial margin of the greater and transepicondylar line for reconstruction of humeral head retroversion. We suggest that the lesser tuberosity should be used to determine the retroversion, especially in cases when the margin of humeral head was destructed.
- MeSH
- artroplastika MeSH
- humerus anatomie a histologie MeSH
- lidé MeSH
- ramenní kloub anatomie a histologie chirurgie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
To evaluate the mid-term results in a group of patients with displaced comminuted (three- and four-fragment) fractures of the proximal humerus treated by angle-stable plate osteosynthesis and compare them with the results in the patients in whom the method of percutaneous Kirschner-wire (K-wire) fixation was used. MATERIAL AND METHODS The group treated with angle-stable implants (ASI group) consisted of 55 patients, 13 men and 42 women. ATargon Ph nail was used in 32 and a Philos plate in 23 patients. These patients were compared with a group of nine patients, one man and eight women, treated by percutaneous K-wire fixation (K-wire group). At a follow-up of 12 months at least, final Constant (CS) and DASH scores were assessed. The CS was related to the values for the unaffected limb, and an individual relative CS was calculated and expressed in percent. The mean follow-up was 30 (range, 13-55) months in the ASI group and 58 (range, 39-76) months in the K-wire group. The following seven characteristics were evaluated : fracture type, surgical technique, dominance of the affected limb, patient age, injury-surgery interval, and individual relative CS and DASH scores. The results were statistically analysed with a 5% level of statistical significance set for all tests. RESULTS The average age in the ASI group was 62.1 years, with 64.7 (range, 29-95) years for women and 35.5 (range, 26-76) years for men. In the K-wire group the average age was 66.1 (range, 53-84) years. The functional outcomes in four-fragment fractures were significantly worse than in three-fragment fractures (mean relative CS and DASH scores of 56 and 21 versus 72 and 32). The K-wire group showed a significantly worse functional outcomes than the ASI group in both the mean relative CS score (p<0.001) and the mean DASH score (p=0.003). No significant relationship was found in any other pair of variables. The patient's age had no effect on functional outcome, as assessed by CS (p=0.412) and DASH (p=0.076) and the injury-surgery interval had no influence, either (CS, p=0.220; DASH, p=0.118). There was no relation between the patient's age and choice of the surgical method (p=0.467), between the patient's age and a fracture type (p=0.356) and between the patient's age and injury to either a dominant or a non-dominant limb (p=0.659). Dominance or non-dominance of the affected limb had no effect on CS or DASH scores (p=0.662 and p=0.302, respectively) or on a type of fracture (p=0.183). DISCUSSION Several surgical techniques used for the treatment of proximal humerus fractures suggest the absence of consensus in therapy. Novel angle-stable implants show better biochemical properties and meet criteria required in minimally invasive techniques. Some authors prefer intramedullary nailing for three-fragment fractures and the use of an angle-stable plate for four-fragment fractures. These indication criteria were also confirmed by the results of our study. CONCLUSIONS The analysis of functional outcomes showed that the therapeutic effect of K-wire transfixation was significantly worse than the effect of the angle-stable plate technique, and therefore the authors stopped using this method. At present intramedullary nailing is indicated in two- and three-fragment fractures and in some less displaced four-fragment fractures. An angle-stable plate is used in severely displaced four-fragment fractures. If the head is broken or dislocated, older patients are primarily indicated for hemiarthroplasty and younger ones for humeral head reconstruction.
- MeSH
- dospělí MeSH
- financování organizované MeSH
- fraktury proximálního humeru chirurgie MeSH
- kostní dráty MeSH
- lidé středního věku MeSH
- lidé MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- tříštivé fraktury chirurgie MeSH
- vnitřní fixace fraktury metody MeSH
- výsledek terapie MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- srovnávací studie MeSH
PURPOSE OF THE STUDY: The aim of this study is to compare functional and X-ray results before and after four-corner arthrodesis using an angular stable dorsal circular plate in patients with post-traumatic degenerative changes of the wrist. METHODS: Nine consecutive patients with scapholunate advanced collapse (SLAC) or scaphoid nonunion advanced collapse (SNAC) of the wrist, stage III, underwent scaphoid excision and four-corner fusion using angular stable plate fixation. The wrists were immobilised using a split for two weeks and then a removable wrist brace with assisted physiotherapy for four weeks. Minimal followup was 18 months. Clinical assessment before and after surgery included the wrist range of motion (ROM), grip strength, presence of pain, disabilities of the arm, shoulder and hand (DASH) scores, and radiographic findings of the carpal height and ulnar translation ratios. Differences were statistically tested. In addition, patients' satisfaction with functional outcomes was evaluated. RESULTS: In the post-operative period the patients experienced less pain during daily activities and had a better carpal height ratio than before surgery; these differences were statistically significant. In the other criteria, although showing better post-operative results, improvement was not statistically significant. Eight patients were satisfied with the final outcome. One patient required limited denervation of the wrist for pain relief. There was no non-union. DISCUSSION The functional outcomes (ROM, grip strength) in our patients at follow-up were fully comparable with the previously published studies. Although, by most postoperative treatment protocols, physical therapy is started at four to eight weeks of rigid fixation of the wrist, no non-union was found in our group of patients who had a shorter period of post-operative fixation. CONCLUSIONS: Four-corner arthrodesis of the wrist using angular stable dorsal circular plate fixation provides pain relief with acceptable preservation of the range of motion and no consolidation problems. Long-term follow-up and a larger group of patients would be necessary to confirm these hopeful results.
- MeSH
- artrodéza metody MeSH
- bolest prevence a kontrola MeSH
- člunkovitá kost chirurgie MeSH
- kosti zápěstní chirurgie MeSH
- kostní destičky * MeSH
- lidé MeSH
- obnova funkce MeSH
- poranění zápěstí komplikace patofyziologie MeSH
- síla ruky MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- anglický abstrakt MeSH
- časopisecké články MeSH
