En ortopedia, la lesión de Bankart es una rotura de la parte anteroinferior del reborde glenoideo o labrum glenoideo de la escápula, a consecuencia de una luxación anterior de hombro. Perthes lesion is variant of Bankart lesion, presenting as an anterior glenohumeral injury that occurs when the scapular periosteum remains intact but is stripped. Sometimes, glenoid bone loss accompanies a bony fragment, which is called a bony Bankart lesion. This is observed in.
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This resulted in both a Hill-Sachs impression fracture on the posterior aspect of the humeral head blue arrow and an impression fracture on the anterior aspect as a result of posterior dislocation red arrow. Parke et al 35 evaluated engagement before and after the Bankart repair. The odds ratio of off-track patients over the on-track patients to experience recurrence was 8. Sometimes this makes it easier to understand the anatomy. Please help to improve this article by introducing more precise citations.
Determination of prevalence of glenoid bony lesions after recurrent anterior shoulder dislocation using the 3-D CT scan. The track of the extended arm moved along the end-range creates a large circle around the shoulder joint. The images show a subtle Bankart fracture arrows. The lesion is associated with any damage to the antero-inferior labrum.
Shoulder MR – Instability
Sagittal MR-arthrogram demonstrates the superior extension of banart Bankart tear. Notice the abnormal contour of the anterior glenoid and the avulsed anterior rim arrow. Shoulder stability The basic concept of shoulder stability is explained in the first section of this article so that the following explanation of bony stability will be better and more easily understood by the readers.
This lesion is located close to the greater tuberosity. In that case, a best-fit circle method can be used instead.
Luxación de hombro, Inestabilidad del hombro, lesión del labrum hombro
Clinical Orthop Relat Res ; Therefore, a dislocation could be physiological or pathological depending on leaion position of the arm the dislocation occurs in and whether it is accompanied by symptoms. Articles lacking in-text citations gombro October All articles lacking in-text citations Infobox medical condition new Pages using infobox medical condition with unknown parameters Articles to be expanded from November All articles to be expanded Articles with empty sections from November All articles with empty sections Articles using small message boxes Wikipedia articles needing clarification from October Especially in younger patients this results homhro a Bankart fracture or a Bankart lesion which is a tear of hombrro anteroinferior labrum.
Bankart lesions are typically located in bankarr o’clock position because that’s where the humeral head dislocates. If this subluxation or dislocation accompanies no symptoms, this laxity is just physiological and no treatment is necessary. As soon as the muscle contraction occurs with the arm elevated, the contraction force by the shoulder muscles pulls the humeral head against the glenoid socket, which in turn creates a resistance force against translation of the humeral head.
The anterior and posterior drawer tests load and shift test and sulcus test are performed with the arm in the mid-range of movement because these tests are aimed to detect the laxity of the shoulder joint.
Mid-range stability is provided by the negative intra-articular pressure 34 and the concavity-compression effect. Hill-Sachs lesion HSL and the glenoid: First, we measured the bony stability using the stability ratio without any soft-tissue contribution; 13 next, we measured the shoulder stability after the Bankart repair in a displacement control study.
They are not in the o’clock position, which makes it easy to differentiate them from a Bankart tear. For the latter, there are also lesioon methods to express the defect size: On coronal images you want to make sure whether this is a variant like a labral recess or labral foramen or whether this is a SLAP.
Case 1 Case 1. On MR-arthrography it may be difficult to depict the osseus fragment. Lesioon means that MR-arthrography with the arm in the neutral position may fail to detect the labral tear. It should not be confused with Perthes disease of the hip.
The dislocation of the humeral head to antero-inferior causes damage to the antero-inferior rim of the glenoid in the 3 – 6 o’clock position marked in red. Images of a MR-arthrogram. In our daily practice, we use en face views of both glenoids and the posterior view of the involved humeral head on 3D CT.
For example, the anteroinferior capsule including the inferior glenohumeral ligament IGHL becomes tight when the arm is in abduction, external rotation and jombro extension.
Loading Stack – 0 images remaining. At the end-range of movement, a part of the shoulder joint capsule becomes tight and prevents further movement of the arm.
Structurally, this fracture is thought to be less contributory to anterior instability. Edit article Share article View revision history. The effect of a glenoid defect on anteroinferior stability of the hombfo after Bankart repair: The role of atmospheric pressure in stabilising the shoulder.
Thus, different from a glenoid bony defect, a HSL is related to the end-range instability. Imaging the joint in the ABER position is helpful in increasing detection rates.
Motion in a posterior direction is limited by the posterior rim of the glenoid which is in an anteverted position. Most commonly due to anterior shoulder dislocation. It is above or at the level of the bankary in bankarf first 18 mm of the proximal humeral head. Contact between the glenoid and the humeral head in abduction, external rotation, and horizontal extension: SLAP tears start at the 12 o’clock position where the biceps anchor is located, which tears the labrum off the glenoid.
Posterior dislocations are uncommon and not as obvious on the X-rays as an anterior dislocation. On the images a posterior dislocation is seen with a hombgo. This translation of the humeral head is called laxity. If the arm is pulled downward sulcus testthe humeral head may translate inferiorly in varying degrees. Case 5 Case 5. The prevalence of a large Hill-Sachs lesion that needs to be treated.