ABSTRACT
Purpose: To prospectively evaluate the survival rate, follow-up rate, clinical and radiographic results of NexGen(R) total knee replacement arthroplasty (TKRA). Materials and Methods: Between June 1998 and March 2002, 434 knees in 278 patients after TKRA performed by a single-surgeon using the same implant were evaluated prospectively. The preoperative diagnosis was primary osteoarthritis in 399 knees, osteonecrosis in 17 knees, rheumatoid arthritis in 12 knees and post-traumatic arthritis in 6 knees. Data collection, physical examination and radiographic evaluation were carried out at postoperative 1, 2, 3 and 5 years. A telephone survey was carried out for the patients who could not visit the outpatient clinic, and the mean follow-up duration was 4.3 years (3-7 years). The follow-up rate and survival rate was analyzed using the Kaplan-Meier method with the reimplantation cases being counted as a failure. The clinical results were evaluated by the Knee Society Score, and the range of motion and status of the implants were assessed by a radiographic evaluation. Results: The total follow up rate was 91.0% (395/434). The survival rate was 98.3% at 5 years after surgery and the survival rate excluding the infection cases was 99.0% 5 years after surgery. The Knee Society Total Score improved to 96.8 in the cruciate retaining (CR) type and to 95.2 in the Legacy posterior stabilized (LPS) type. The Knee Society Function Score improved to 82.6 in the CR type and to 73.8 in the LPS type on the final follow up. The average preoperative further flexion was 122.6, which improved to 125.4. The radiographic evaluation revealed 6 cases (1.5%) of osteolysis with reimplantation being performed in 2 cases. Conclusion: In this prospective study, with a high follow-up rate (91.0%), the survival rate of TKRA using the NexGen(R) implant was relatively high and satisfactory in terms of the functional improvement. However, a long-term follow-up evaluation will be needed.
Subject(s)
Humans , Ambulatory Care Facilities , Arthritis , Arthritis, Rheumatoid , Arthroplasty , Arthroplasty, Replacement, Knee , Data Collection , Diagnosis , Follow-Up Studies , Knee , Osteoarthritis , Osteolysis , Osteonecrosis , Physical Examination , Prospective Studies , Range of Motion, Articular , Replantation , Survival Rate , TelephoneABSTRACT
OBJECTIVES: To evaluate changes of the gait pattern and the clinical improvement in patients with degenerative arthritis of the knee after total knee arthroplasty (TKA). METHOD: Gait analysis was performed in 64 patients with degenerative arthritis of the knee at pre- and post-surgery 1 year, also Hospital for Special Surgery (HSS) knee score and Visual analogue scale (VAS) for clinical assessment were investigated. RESULTS: 1) In the HSS knee score and VAS, there were statistically significant improvement after surgery (p<0.05). 2) In the postoperative gait analysis, all the linear parameters except single limb support period were significantly improved (p<0.05). Single limb support period was improved, but statistically insignificant. All the kinematic and kinetic parameters also were significantly improved (p<0.05). CONCLUSION: This study suggests that gait analysis can be used for quantitative evaluation of the effects of total knee arthroplasty in patients with degenerative arthritis of the knee.
Subject(s)
Humans , Arthroplasty , Evaluation Studies as Topic , Extremities , Gait , Knee , OsteoarthritisABSTRACT
For the reconstruction of the bone and soft tissue defect in the leg, combined free muscle flap and Ilizarov bone distraction method have been described as useful treatment modality. Five patients were treated by delayed Ilizarov method in conjunction with free muscle flap coverage. All flaps survived in spite of distraction of bone, elevation of flap for docking procedure and partial flap revision. There were no anastomotic complications. Tendency of decreased flap dimension and interposition of flap between distracted bone stumps were noted. The mean segmental defects were 8.8 cm and the mean distraction lengths were 9.8cm. The mean periods from free muscle flap coverage to Ilizarov bone distraction were 77 days(the shortest periods were 19 days and the longest periods were 5 months). The follow up interval from the time of free muscle flap coverage ranged from 4 to 35 months. Gradual distraction of a free tissue is a safe procedure and does not compromise the vascular flow to the flap. The position of flap and vascular pedicle should be carefully planned and the onset and the rate of distraction should be individualized.
Subject(s)
Humans , Follow-Up Studies , Free Tissue Flaps , Ilizarov Technique , LegABSTRACT
Discoid meniscus has been defined as a morphological anomaly, and several clinical classification has been proposed. Commonly used classification is Watanabes classification; complete, incomplete and Wrisberg ligament type discoid meniscus. It is a relatively more common disease of the knee in Korea and Japan than western countries. Eighty-one discoid meniscal tears which were operated arthroscopically between the period of June, 1991 and August, 1996 were reviewed retrospectively. The purpose of this study is to analyze the pattern of the tear and the extent of arthroscopic resection according to the arthroscopic classification of the discoid meniscus. Thirty-three cases were classified as complete and forty-five cases as incomplete and three cases were Wrisberg ligament type. The major pattern of the tear in the complete type lesions was horizon- tal(in twenty-three) and complex(in seven) tear. Of the knees that had an incomplete type lesion, longitudinal(in ten including six bucket-handle tear) and degenerative tear(in eight) were observed more frequently, and horizontal tear(in ten) less frequently than that of the complete type. The extent of arthroscopic resection of the discoid meniscus was related to the pattern of tear and type of the discoid meniscus. For the majority of the horizontal tear, arthroscopic partial meniscectomy (twentyeight of thirty-four) was performed, but arthroscopic subtotal and total meniscectomy was performed more frequently for longitudinal tear, complex tear, and Wrisberg ligament type.
Subject(s)
Classification , Japan , Knee , Korea , Ligaments , Retrospective StudiesABSTRACT
Between August 1994 and June 1995, seventeen patients diagnosed as having partial or complete ruptures of the anterior cruciate ligament on MRI were managed by non-operative methods. Among them four patients were excluded due to operation during follow-up and the results were evaluated at a one year follow-up. We selected the patients prospectively for non-operative care using the selection criteria of age, degree of instability, activity level and patient compliance. The average age of them was 37.7 years. Initially knee stress test and MRI were checked, and Cybex study and Lysholm knee scoring were done at post-trauma one year follow-up. They were managed conservatively by ROM and muscle strengthening exercises and a brace fitting schedule for three months. Among them, six cases had partial tears and seven had a complete tear initially. At the one year follow-up, five of six cases who had shown partial ruptures, and two of seven cases with complete tears, recovered continuity of the ruptured ACL on MRI. Their Lysholm knee score was 84.4, and the Cybex test showed no difference in muscle power between the injured and uninjuried side. Those patients who had loss of continuity on follow-up MRI showed Lysholm score of 57.4 and decreased muscle power on Cybex study. Although there are still controversies about the adequate management of ACL injuries, our study suggests that conservative management is a viable alternative to surgery as long as the patients are selected prudently. For more concrete results, however, careful analysis based on a longer follow up period is necessary.
Subject(s)
Humans , Anterior Cruciate Ligament , Appointments and Schedules , Braces , Exercise , Exercise Test , Follow-Up Studies , Knee , Magnetic Resonance Imaging , Patient Compliance , Patient Selection , Prospective Studies , RuptureABSTRACT
Recently there has been decreasing trend of high tibial osteotomy in management of the gonarthrotic patients partly due to recurrence of the symptom and, more importantly, due to the relative success of the total knee joint replacement procedure. But there is still room for the high tibial osteotomy, although it may be 'outdated' procedure, in that younger active patients do well postopera- tively for an enough period of time and that even the older have some gain of pain-relief in early postoperative period. The purpose of this study is to detect the affecting factors of the result of the operation. We reviewed 25 valgus high tibial osteotomies in 23 patients who had medial gonarthrosis and could be followed-up more than 1 year among 32 cases between August 1989 and January 1994. The mean length of follow-up was 30 months(ranged twelve to fifty four months). The results were compared according to modified grading of the HSS score. All cases showed the increase of the score from preop. average 65.2 points to postop. 87.8 points, mainly by the decrease of pain and the increase of functional activity. The severity of degenerative change on the radiographs and the degree of varus seemed to be related with the early clinical results of the operation, but the age was not a major affecting factor. These results could be debatable due to some differences from the others', and long term follow-up would be needed.
Subject(s)
Humans , Follow-Up Studies , Knee Joint , Knee , Osteoarthritis , Osteotomy , Postoperative Period , RecurrenceABSTRACT
For prevention of limitation of range of motion due to arthrofibrosis of the knee joint after anterior cruciate ligament reconstruction, it is accepted in general that the operation should be delayed for about three weeks after injury. We studied the duration form operation to time of full range of motion, and analized the results in forty-eight patients who had undergone arthroscopic anterior cruciate ligament recostruction using the autologous bone-patella tendon-bone graft and early CPM, range of motion exercise during Feb. 1991 and June 1994. The results were as follows: 1. The average interval from injury to operation were 1.3 weeks in acute injury group, 6 weeks in subacute injury group and 20.7 months in chronic group. The average interval from operation to full range of motion were 7.1 weeks in acute injury group, 5.7 weeks in subacute injury group and 3.0 weeks in chronic group. 2. In acute injury group, 14(93.3%) of 15 cases showed full extesion and only 1 case(6.7%) showed the limitation of extension less than 5 degrees. In subacute injury group, 6(85.7%) of 7 cases showed full extension but1 case(14.3%) showed the limitation of extension less than 5 degrees. On the other hand in the chronic injury group, all the 26 cases(100%) of the patients showed full extension. 3. In acute injury group, 14(93.3%) of 15 cases showed full flexion and only 1 cases(6.7%) showed the limitatin of flexion less than 5 degrees. In subacute injury group, 6(85.7%) of 7 cases showed full flexion but 1 case(14.3%) showed the limitation of flexion less than 5 degrees. On the other hand in the chronic injury group, 23(88.5%) of 26 cases could flex to full range of flexion, and 3 cases(11.5%) revealed limitation of flexion less than 5 degrees. 4. The limitation of ROM mainly due to arthrofibrosis can be prevented by early range of motion execise and active rehabilitation in the acute or chronic anterior cruciate ligament reconstruction using the autograft bone-patella-bone graft. Although in acute patients the interval from operation to full ROM can be prolonged, the full ROM can be achieved after all.
Subject(s)
Humans , Anterior Cruciate Ligament Reconstruction , Anterior Cruciate Ligament , Autografts , Hand , Knee Joint , Patella , Patellar Ligament , Range of Motion, Articular , Rehabilitation , TransplantsABSTRACT
From March 1992 to June 1994, we experienced five failed cases of anterior cruciate ligament reconstruction. Four out of five cases had reconstruction in other hospitals. Two of them had anterior cruciate ligament reconstruction using artificial ligament, one using bone-patellar tendon-bone auto- graft, and one using bone-patellar tendon-bone autograft augmented by artificial ligament. The remaining one case had arthroscopic anterior cruciate ligment reconstruction using bone-patellar ten- don-bone autograft in Asan Medical Center. We performed arthroscopic revision anterior cruciate ligament reconstruction using allograft in four cases and bone-patellar tendon-bone autograft in one case. All cases were treated with vigorous postoperative rehabilitation program including postoperative immediate range of motion(ROM) exercise and muscle strengthening exercise. Postoperative results were evaluated by Lysholm knee score in average 17.2 months(range from 12 months to 25 months). The average Lysholm score improved from 49.8 to 81.4. At follow-up study, anterior drawer test with Telos device revealed 2mm of average side to difference.
Subject(s)
Allografts , Anterior Cruciate Ligament Reconstruction , Anterior Cruciate Ligament , Arthroscopy , Autografts , Follow-Up Studies , Ligaments , Lysholm Knee Score , Rehabilitation , TransplantsABSTRACT
Only a few cases of cyst related to cruciate ligament were reported in the literatrure. It is not only because of rarity but also difficulty of diagnosis by conventional method. Recentely, the precise intraarticular structure of the knee joint became to be seen by introduction of MRI and arthroscope and cycts would bave been found incidentally during the workup of the internal derangement of knee. We have experienced three cases of ganglion around the cruciate ligament in the patients whose symptom was mimic of intemal derangement of knee. We excised the ganglion with good clinical results.
Subject(s)
Humans , Arthroscopes , Diagnosis , Ganglion Cysts , Knee Joint , Knee , Ligaments , Magnetic Resonance Imaging , MethodsABSTRACT
The purpose of this study is to compare the effects of the femoral attachment points of the graft and knee flexion angles at the time of graft fixation on stability of posterior cruciate ligament reconstruction. We analyzed the posterior stability of the knee on 23 patients(24 knees) with posterior cruciate ligament injury whose posterior cruciate ligament had been reconstructed arthroscopically and followed for minimum 1 year period at Asan Medical Center from May 1992 to June 1994. The patients were divided into the two groups according to femoral attachment points of the graft and knee flexion angles at the time of graft fixation. The distance from the junction of the intercondylar notch with trochlear groove of the femoral attachment points and knee flexion angles were 11mm and 0°-30° in group A and 7mm and 70°-90° in group B, respectively. 11 knees were included in group A and 13 knees in group B. Posterior stability was determined by difference in posterior tibial translation between the injured and the opposite knee with Telos device. In group A, 5 cases were at the range of 0-2mm, 3 cases 3-5 mm, 3 cases 6-10mm. In group B, 10 cases were at the range of 0-2mm and 3 cases 3-5mm, respectively. Differences in posterior tibial translation on average were 3.6mm and 1.7mm in group A and B, respectively. Conclusively, arthroscopic postrior cruciate ligament reconstruction with femoral attachment point at 7mm from the junction of interconlylar notch with trochlear groove and 70°
Subject(s)
Humans , Knee , Ligaments , Posterior Cruciate Ligament , TransplantsABSTRACT
Cybex evaluation of muscle strength was performed on 15 patients with chronic anterior cruciate ligament tears following arthroscopic reconstruction using central one-third patella tendon autograft. Cybex testing was done preoperatively and at 3, 6, 9, and 12 months postoperatively. Peak torque and total work of the quadriceps and hamstrings at the angular velocity of 60 degree/sec and 180 degree/sec were measured and analyzed. The results were as follows: l. At the angular velocity of 60 degree/sec, the muscle strength of the quadriceps showed 45.4% deficit in peak torque and 50.9% deficit in total work compared to the contralateral normal knee preoperatively, 48.2% and 49.0% deficit respectively at 3 months after operation, 40.3% and 37.7% deficit at 6 months, 30.6% and 32.5% deficit at 9 months and 23.4% and 24.7% deficit at 1 year after operation. 2. At the angular velocity of 60 degree/sec, the muscle strenggth of the hamstrings showed 32.3% deficit in peak torque and 42.9% deficit in total work compared to the contralateral normal knee preoperatively, 39.3% and 42.4% deficit respectively at 3 months after operation, 27.3% and 32.3% deficit at 6 months, 21.2% and 22.3% deficit at 9 months and 17.9% and 18.4% deficit at 1 year after operation. 3. At the angular velocity of 180 degree/sec, the muscle strength of the quadriceps showed 38.4% deficit in peak torque and 42.0% deficit in total work compared to the contralateral normal knee preoperatively, 41.1% and 47.54% deficit respectively at 3 months after operation, 34.4% and 33.7% deficit at 6 months, 28.5% and 28.6% deficit at 9 months and 21.0% and 22.1% at 1 year after operation. 4. At the angular velocity of 180 degree/sec, the muscle strength of the hamstrings showed 26.9% deficit in peak torque and 31.8% deficit in total work compared to the contralateral normal knee preoperatively, 41.2% and 45.2% deficit respectively at 3 months after operation, 32.3% and 36.0% deficit at 6 months, 21.4% and 25.1% deficit at 9 months and 16.1% and 15.7% at 1 year after operation.
Subject(s)
Humans , Anterior Cruciate Ligament Reconstruction , Anterior Cruciate Ligament , Autografts , Knee , Muscle Strength , Patellar Ligament , Tears , TorqueABSTRACT
Magnetic resonance imaging(MRI) is accepted as a useful tool for the diagnosis of injury of the knee recently. The anterior cruciate ligament tear is accompanied by the damage of the osseous and soft tissue of the knee. The occult osseous lesion is found on magnetic resonance imaging as bone density change that is not found on the simple radiograph. From Jan. 1992 to Apr. 1994, magnetic resonance imaging was performed on 44 patients with acute anterior cruciate ligament tears. MRI was done within 6 weeks of the index anterior cruciate ligament injury. The criteria of decreased signal intensity on the Tl weighted image and increased signal intensity on the T2 weighted image was applied for the incidence assessment of the occult osseous lesion. After arthroscopy with or without ACL reconstruction, follow-up simple radiograph was checked every 3 months. Occult osseous lesions were documented in 32(73%) of the 44 patients. Of the 32 patients with bony lesion, 81% had lesions of the lateral compartment. Lateral femoral condyle was involved in 15 cases(46.9%), and lateral tibial plateau in 22 cases (68.8%). Follow-up X-ray revealed no joint deperession in all of the 32 patients with the occult osseous lesion. This result suggests that there is a high correlation between the occult osseous lesion of lateral compartment of the knee on magnetic resonance imaging and anterior cruciate ligament tear. The presence of the occult osseous lesion in the patient with acute anterior cruciate ligament tear did not affect rehabilitation and weight bearing.
Subject(s)
Humans , Anterior Cruciate Ligament , Arthroscopy , Bone Density , Diagnosis , Follow-Up Studies , Incidence , Joints , Knee , Magnetic Resonance Imaging , Rehabilitation , Tears , Weight-BearingABSTRACT
No abstract available.