32 research outputs found
Segond's fracture: a biomechanical cadaveric study using navigation
Background Segond’s fracture is a well-recognised radiological
sign of an anterior cruciate ligament (ACL) tear.
While previous studies evaluated the role of the anterolateral
ligament (ALL) and complex injuries on rotational
stability of the knee, there are no studies on the biomechanical
effect of Segond’s fracture in an ACL deficient
knee. The aim of this study was to evaluate the effect of a
Segond’s fracture on knee rotation stability as evaluated by
a navigation system in an ACL deficient knee.
Materials and methods Three different conditions were
tested on seven knee specimens: intact knee, ACL deficient
knee and ACL deficient knee with Segond’s fracture. Static
and dynamic measurements of anterior tibial translation
(ATT) and axial tibial rotation (ATR) were recorded by the
navigation system (2.2 OrthoPilot ACL navigation system
B. Braun Aesculap, Tuttlingen, Germany).
Results Static measurements at 30 showed that the mean
ATT at 30 of knee flexion was 5.1 ± 2.7 mm in the ACL
intact condition, 14.3 ± 3.1 mm after ACL cut
(P = 0.005), and 15.2 ± 3.6 mm after Segond’s fracture
(P = 0.08). The mean ATR at 30 of knee flexion was
20.7 ± 4.8 in the ACL intact condition, 26.9 ± 4.1 in
the ACL deficient knee (P[0.05) and 30.9 ± 3.8 after
Segond’s fracture (P = 0.005). Dynamic measurements
during the pivot-shift showed that the mean ATT was
7.2 ± 2.7 mm in the intact knee, 9.1 ± 3.3 mm in the
ACL deficient knee(P = 0.04) and 9.7 ± 4.3 mm in the
ACL deficient knee with Segond’s fracture (P = 0.07).
The mean ATR was 9.6 ± 1.8 in the intact knee,
12.3 ± 2.3 in the ACL deficient knee (P[0.05) and
19.1 ± 3.1 in the ACL deficient knee with Segond’s
lesion (P = 0.016).
Conclusion An isolated lesion of the ACL only affects
ATT during static and dynamic measurements, while the
addition of Segond’s fracture has a significant effect on
ATR in both static and dynamic execution of the pivot-shift
test, as evaluated with the aid of navigation
1935 The Freshman, vol. 2, no. 13
The Freshman was a weekly, student newsletter issued on Mondays throughout the academic year. The newsletter included calendar notices, coverage of campus social events, lectures, and athletic teams. The intent of the publication was to create unity, a sense of community, and class spirit among first year students. The front page of issue 13 is dedicated in memoriam of Emile J. Dawson (1910-1932), who died from a cerebral hemorrhage after he struck his head on a concrete floor at the Armory, knocked down by his opponent in an intramural boxing tournament
1935 The Freshman, vol. 2, no. 11
The Freshman was a weekly, student newsletter issued on Mondays throughout the academic year. The newsletter included calendar notices, coverage of campus social events, lectures, and athletic teams. The intent of the publication was to create unity, a sense of community, and class spirit among first year students
1935 The Freshman, vol. 2, no. 14
The Freshman was a weekly, student newsletter issued on Mondays throughout the academic year. The newsletter included calendar notices, coverage of campus social events, lectures, and athletic teams. The intent of the publication was to create unity, a sense of community, and class spirit among first year students
1935 The Freshman, vol. 2, no. 18
The Freshman was a weekly, student newsletter issued on Mondays throughout the academic year. The newsletter included calendar notices, coverage of campus social events, lectures, and athletic teams. The intent of the publication was to create unity, a sense of community, and class spirit among first year students. Included in this issue is an article about forming a Glee Club and genres of music selected based on the gender of participants
1935 The Freshman, vol. 2, no. 17
The Freshman was a weekly, student newsletter issued on Mondays throughout the academic year. The newsletter included calendar notices, coverage of campus social events, lectures, and athletic teams. The intent of the publication was to create unity, a sense of community, and class spirit among first year students. This issue includes a story of the kidnapping of Stanwood Searles, president of the sophomore class, by members of the freshmen class as part of an annual interclass competition between first and second year students on campus
1935 The Freshman, vol. 2, no. 16
The Freshman was a weekly, student newsletter issued on Mondays throughout the academic year. The newsletter included calendar notices, coverage of campus social events, lectures, and athletic teams. The intent of the publication was to create unity, a sense of community, and class spirit among first year students. Included in this issue is discussion of littering on campus
Review: Current concepts in computer-assisted hip arthroscopy.
In the last 15Â years, hip arthroscopy has become increasingly popular in addressing femoroacetabular impingement (FAI) because of its minimally invasive approach. However, assessing the adequacy of bone resection when correcting FAI can be difficult because visualisation and spatial awareness of the joint are poor. Recent advances in technology in the field of computer-assisted surgery and navigation and robotic surgery in orthopaedics as a resource for preoperative planning and intraoperative assistance have been widely reported. This technology is expected to upgrade surgical planning and operative techniques, decrease human error and improve patient outcomes by precisely defining the divergent anatomy and kinematics of the hip joint. This review attempts to bring the reader up-to-date with the current developments in the field of computer assisted hip arthroscopy, and discusses our experience with pre-operative planning, navigation and robotics and also provides a platform for future research in this arena