Aims. The aim of this study was to compare the incidence of
Objectives. To assess the effectiveness of a modified tibial tubercle osteotomy
as a treatment for arthroscopically diagnosed chondromalacia patellae. Methods. A total of 47 consecutive patients (51 knees) with arthroscopically
proven chondromalacia, who had failed conservative management, underwent
a modified Fulkerson tibial tubercle osteotomy. The mean age was
34.4 years (19.6 to 52.2). Pre-operatively, none of the patients
exhibited signs of patellar maltracking or instability in association
with their
Our purpose was to evaluate the incidence of
Aims. It is not clear whether
Introduction. Up to 15 % of patients report
There is a recognised incidence of
Excessive foot pronation has been considered to be related to
Purpose: A relationship between vastus medialis oblique (VMO) strength and anterior pain and disability has been suggested. A biomechanical protocol was used to access the deficiency of the quadriceps muscles in patients with
Aim: To assess the prevalence of
Aims:
The purpose of this study was to test the hypothesis that patella alta leads to a less favourable situation in terms of patellofemoral contact force, contact area and contact pressure than the normal patellar position, and thereby gives rise to
Introduction. Special high-flexion prosthetic designs show a small increase in postoperative flexion compared to standard designs and some papers show increased
Achieving deep flexion of knee after total knee arthroplasty (TKA) is particularly desirable in some Asian and Middle Eastern who have daily or religious customs typically use full knee flexion. After TKA, some patients complained about
The prevalence of
The aim of this study was to assess the outcome of patients who underwent ElmslieTrillat antero-medial tibial tubercle transfer for treatment of persistent symptomatic
Total knee arthroplasty (TKA) disturbs patellar blood flow, an unintended accompaniment to TKA that may be a cause for postoperative
Whereas thermography has already been used as an assessment of disease activity in some kinds of inflammatory arthritis, it is a new method for objektive pain evaluation in patients with joint prosthesis. To our knowledge, no study has tested the correlation between increase of temperature and
Introduction.
We performed an advancement and medial transfer of the tibial tuberosity based on Fulkerson's principle to treat intractable
We assessed patellofemoral joint function by combining the measurement of maximal isometric extensor torque at the knee with clinical and radiological measurements in order to calculate the patellofemoral contact force. Eighteen volunteers established the normal ranges of results and the reliability of the system. Of the 39 patients with a variety of knee problems, 29 had
Introduction: Poor proprioception and imbalance between quadriceps and hamstrings have been suggested as causes for
Purpose: The study was designed to evaluate the biomechanical and neurohistological properties of the infrapatellar fat especially concerning its potential role in the
Postoperative
Introduction. A comprehensive met-analysis of
To assess the prevalence of
PURPOSES. Previous studies on patella-femoral morphology have suggested patella maltracking plays an important part in the aetiology but there had been no studies correlating maltracking with articular cartilage change. METHODS. We studied 147 consecutive patients (294 knees) aged between 10 and 63 presenting with
Purpose of the study: To develop a new treatment algorithm for patients with chronic
Purpose of the study: To develop a new treatment algorithm for patients with chronic
Out of a total of 623 patients who, over a ten-year period, underwent primary total knee replacement (TKR) without patellar resurfacing, 20 underwent secondary resurfacing for chronic
Introduction and Aims: Many authors believe that patellar resurfacing decreases the incidence of
The purpose of this study was to evaluate the influence of trochlear design in total knee replacement with and without patellar resurfacing. Methods and Results: In 1992 a trial was set up, including all patients undergoing primary PFC (Johnson &
Johnson) total knee replacement. Patients were randomised to either patellar resurfacing or retention. The patients were assessed using the American Knee Society rating, a clinical
Aims: To report the outcome of secondary patellar resurfacing in patients with chronic
Many authors believe that patellar resurfacing decreases the incidence of
Idiopathic
Introduction.
The aim was to compare
We report a rare case of an intracortical chondroma in the region of the medial femoral condyle of the femur extending into the femoral sulcus and the patellofemoral joint.A sixteen year old Asian boy presented with repeated episodes of right sided
Purpose.
Aims: The purpose of the study was to determine the distribution and speciþcation of nerve þbers in the infrapatellar fat pad especially concerning nociceptive substance-P þbres. Methods: The infrapatellar fat pad was taken as a fresh specimen out of 21 patients (4 male, 17 female, mean age 69 years) during total knee arthroplasty. It was dissected in þve deþned parts, þxed and embedded in parafþn. Immunohistochemical techniques using antibodies against S-100 protein and substance-P were employed to determine and specify the nerve þbres. Results: Studying all the detectable nerves present in 50 þelds (x200 objective) we found an average of 6,4 substance-P- (25%) of a total of 24,7 nerve þbres in the infrapatellar fat pad. There was a significantly (p<
0,01) higher number of substance-P-þbers (24,4 (28%) of 105,7) in the surfacing synovial tissue. The number of S-100-þbers was signiþcantly (p<
0,05) higher in the central and lateral part of the fat pad. Conclusions: The occurance and distribution of nerve þbres in the infrapatellar fat pad suggests a nociceptive function. A neurohistological role in the
The incidence of
Tibial and femoral deformities might cause patellofemoral problems, but they do not have to be modified every time to obtain good results. We have evaluated external tibial rotation characterised by an external tibial deformity in varus, worsening in parallel feet position. In these patients the only surgical treatment is tibial osteotomy, justified by a positive effect on the knee joint mechanics. From 1990 to 2002 we performed 25 derotation tibial osteotomies as an isolated procedure or associated with a closed wedge osteotomy. We reviewed 15 patients (16–28 years old at surgery) with special reference to pain, aesthetic criteria and functional assessments, and we reported possible negative effects of derotation (recurvation and external tibial rotation). In all the patients we found an external rotation higher than standard range and moderate varus. All patients had remission of pain; this was complete in five and partial in six. Ten patients showed an increased tibial rotation and eight of those showed even recurvation without functional sequelae. At 2–12 years of follow-up, our results are satisfactory.
In the absence of patellar resurfacing, we have
previously shown that the use of electrocautery around the margin of
the patella improved the one-year clinical outcome of total knee
replacement (TKR). In this prospective randomised study we compared
the mean 3.7 year (1.1 to 4.2) clinical outcomes of 300 TKRs performed
with and without electrocautery of the patellar rim: this is an
update of a previous report. The overall prevalence of anterior knee
pain was 32% (95% confidence intervals [CI] 26 to 39), and 26% (95%
CI 18 to 35) in the intervention group compared with 38% (95% CI
29 to 48) in the control group (chi-squared test; p = 0.06). The
overall prevalence of
Our study aimed to examine if a mobile-bearing total knee replacement
(TKR) offered an advantage over fixed-bearing designs with respect
to rates of secondary resurfacing of the patella in knees in which
it was initially left unresurfaced. We examined the 11-year report of the New Zealand Joint Registry
and identified all primary TKR designs that had been implanted in
>
500 knees without primary resurfacing of the patella. We examined
how many of these were mobile-bearing, fixed-bearing cruciate-retaining
and fixed-bearing posterior-stabilised designs. We assessed the rates
of secondary resurfacing of the patella for each group and constructed
Kaplan-Meier survival curves.Objectives
Methods