Estimating the Dimensions of the Rotator Interval with Use of Magnetic Resonance Arthrography

Kyung-Cheon Kim; Kwang-Jin Rhee; Hyun-Dae Shin; Young-Mo Kim
November 2007
Journal of Bone & Joint Surgery, American Volume;Nov2007, Vol. 89-A Issue 11, p2450
Academic Journal
Background: The goal of the present study was to define the dimensions of the normal rotator interval with magnetic resonance arthrography and to compare these dimensions with those in shoulders with known chronic anterior instability in order to determine if abnormalities of the rotator interval might be better understood and estimated preoperatively. Methods: We retrospectively reviewed a consecutive series of 202 shoulders that had undergone magnetic resonance arthrography between 2004 and 2005. Of these, 120 shoulders were included in the present study. These shoulders were divided into two groups according to the diagnosis. Group I comprised fifty shoulders with no instability, and Group II comprised seventy shoulders with chronic anterior instability. With use of magnetic resonance arthrography, the base and height of the rotator interval and the diameter of the glenoid were measured. Then, the area of the rotator interval and the rotator interval index were calculated. Results: In Group I, the mean estimated rotator interval dimensions (height and base), the mean calculated rotator interval area, and the mean rotation interval index were 16.73 mm, 48.59 mm, 406.47 mm², and 0.64, respectively. In Group II, these values were 21.87 mm, 49.40 mm, 540.06 mm², and 0.94, respectively. The shoulders in Group II differed significantly from the shoulders in Group I in terms of rotator interval height, rotator interval area, and rotator interval index (p < 0.01 for all). Conclusions: There are significant differences in the dimensions of the rotator interval between patients with and without recurrent anterior shoulder instability. Estimating the dimensions of the rotator interval with use of magnetic resonance arthrography may be valuable for assessing patients preoperatively.


Related Articles

  • The "stable/unstable" chronic isolated anterior syndesmotic injury: a presentation of 5 cases and a new surgical technique for delayed reconstruction. Laver, L.; Palmanovitch, E.; Mei-Dan, O.; Nyska, M. // Muscles, Ligaments & Tendons Journal (MLTJ);2012 Supplement, p38 

    Introduction: isolated syndesmotic injuries are reported to comprise 1-11% of all ankle sprains1. This number may increase to more than 40% in those involved in high contact and collision sports2. These injuries are frequently under- diagnosed often being mistaken for the more common lateral...

  • Real-Time Magnetic Resonance Imaging (MRI) during Active Wrist Motion—Initial Observations. Boutin, Robert D.; Buonocore, Michael H.; Immerman, Igor; Ashwell, Zachary; Sonico, Gerald J.; Szabo, Robert M.; Chaudhari, Abhijit J. // PLoS ONE;Dec2013, Vol. 8 Issue 12, p1 

    Background: Non-invasive imaging techniques such as magnetic resonance imaging (MRI) provide the ability to evaluate the complex anatomy of bone and soft tissues of the wrist without the use of ionizing radiation. Dynamic instability of wrist – occurring during joint motion – is a...

  • Treatment of Lateral Ankle Instability. MCNERNEY, JOHN // Podiatry Management;Sep2015, Vol. 34 Issue 7, p135 

    The article discusses diagnosis, management, and treatment options for lateral ankle instability. Topics explored include the prevalence of lateral ankle sprains among the youth particularly those involved in sports, the need to check for possible presence of edema, hematoma, and eccymosis...

  • Traumatic anterior shoulder instability: current concepts in management. Dobson, M.; Cobiella, C.; Lee, M. // British Journal of Hospital Medicine (17508460);May2009, Vol. 70 Issue 5, p260 

    This review will give an overview of the current management practice and ethos of recurrent anterior shoulder instability, a condition which continues to puzzle and intrigue the shoulder surgeon.

  • Open technique offers safe, effective repair of HAGL lesions. Bruce, Benjamin; Gupta, Anil; Mccormick, Frank; Bach, Bernard; Romeo, Anthony // Orthopedics Today;Dec2012, Vol. 32 Issue 12, p5 

    The article offers information on diagnosis of the humeral avulsion of the glenohumeral ligament (HAGL) lesion. Some of diagnostic techniques involve magnetic resonance imaging, multidetector computed tomography (MDCT), and arthoscopic evaluations. Arthoscopy is mentioned as the gold standard...

  • Subtalar joint instability. Mittlmeier, Thomas; Wichelhaus, Alice // European Journal of Trauma & Emergency Surgery;Dec2015, Vol. 41 Issue 6, p623 

    Purpose: Subtalar joint instability may frequently be overlooked and erroneously be integrated under the diagnosis of ankle joint instability. It was the scope of this review to characterize the present state-of-art with regard to the adequate diagnosis and treatment. Methods: While the clinical...

  • Popliteal Cysts in Paediatric Patients: Clinical Characteristics and Imaging Features on Ultrasound and MRI. Neubauer, Henning; Morbach, Henner; Schwarz, Tobias; Wirth, Clemens; Girschick, Hermann; Beer, Meinrad // Arthritis (20901984);2011, p1 

    Popliteal cysts, or Baker cysts, are considered rare in children and may exhibit particular features, as compared with adults. We studied data from 80 paediatric patients with 55 Baker cysts, examined over a period of 7 years, and correlated clinical presentation with findings on ultrasonography...

  • Rotatory laxity evaluation of the knee using modified Slocum's test in open magnetic resonance imaging. Okazaki, Ken; Tashiro, Yasutaka; Izawa, Toshiaki; Matsuda, Shuichi; Iwamoto, Yukihide // Knee Surgery, Sports Traumatology, Arthroscopy;Apr2012, Vol. 20 Issue 4, p679 

    Purpose: The authors have developed a quantitative method to evaluate rotatory laxity of the anterior cruciate ligament (ACL)-deficient knee using an open MRI. In this study, we evaluated the correlation between the pivot-shift test grading and values measured with this method. Furthermore, the...

  • MRI characteristics of anterior disc displacement with and without reduction. Sener, S.; Akgünlü, F. // Dentomaxillofacial Radiology;Jul2004, Vol. 33 Issue 4, p245 

    Objectives: The aim of this study was to investigate the differences between magnetic resonance imaging (MRJ) characteristics of anterior disc displacement with reduction (ADDR) and without reduction (ADDWR). Methods: A clinician and a radiologist, blinded to the results of the clinical...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics