There have been several reports that total knee arthroplasty(TKA) was most likely to survive successfully if the coronal tibiofemoral angle was close to 7 degree of valgus, the accepted normal. In order to know whether the postoperative coronal tibiofemoral angle influences the result of total knee arthroplasty, we examined the 152 TKA cases in 106 patients which had been performed at Department of Orthopaedic Surgery, Seoul National University Hospital from Jan. 1987 to Dec. 1991. In our series the average follow-up period was 31 months(range, 13 months to 75 months). Coronal tibiofemoral angles of all cases were checked on weight bearing anteroposterior plain X-rays and were divided into three groups(less than valgus 2° ; valgus 3° to 7° ; greater than valgus 8°). All cases were analyzed on the knee score of Hospital for Special Surgery and the American Knee Society total knee arthroplasty roentgenographic evaluation and scoring system and the cases with radiolucent lines wider than 2mm were checked. Three groups were analyzed comparatively with statistical means(Wilcoxon signed rank test, X² test). There were no significant differences in the clinical results of total knee arthroplasty according to the postoperative coronal tibiofemoral angle. Lateral subluxation of the patella occurred more frequently when the postoperative coronal tibiofemoral angle was above valgus 8°. In the tibial components of group lesser than valgus 2°, the frequency of radiolucent lines wider than 2mm was higher than those of other groups, but its significance should be examined through long term follow-up.
Arthroplasty, Replacement, Knee ; Follow-Up Studies ; Humans ; Knee ; Patella ; Seoul ; Weight-Bearing

Although long-term studies of total knee arthroplasty(TKA) have confirmed reliable relief of pain and maintenance of function, survivorship at nine to ten years has been inconsistent with late component loosening being the most frequent mode of failure. Tibial component failure has been more frequent than failure of the femoral or patellar component in most TKA series. Encouraged by the early results of porous-ingrowh femoral and patellar components, and aware of retrieval studies showing poor bone ingrowth into tibial components, the “hybrid” method of fixation with an uncemented femoral component and a cemented tibial component, has been introduced and incorporated the potential advantages of both traditional fixation techniques. Between January 1987 and December 1991, forty-five “hybrid” TKAs(group I) were performed in degenerative arthritis and evaluated retrospectively in comparison with the results of nineteen noncemented porous-coated TKAs(group II) in degenerative arthritis. The average follow-up period was 31 months(range, 14 to 60 months) in group I and 26 months(range, 13 to 63 months) in group II. Using the knee rating scale of the Hospital for Special Surgery and the American Knee Society Roentgenographic Evaluation and Scoring System, clinical and radiological comparative study between two groups was performed. Pain scores, range of motion and HSS knee scores improved in both groups, but there was no significant difference between group I and group II(p>0.05). In both groups, the scores of radiolucent lines were significantly higher in zone 1 and 4 of A-P roentgenograph of the tibial component than in other zones(p < 0.05). The tibiofemoral angle was corrected from varus 2.7° to valgus 5.8° in group I and from varus 3.4° to valgus 4.6° in group II. There was no significant differences in component position and scores of radiolucnet lines between group I and group II. In conclusion, there were no significant differences in clinical and radiological results between the “hybrid” and the cementless groups. Results of this study suggest that both the hybrid fixation and the comentless techniques can reliably provide satisfactory clinical and radiological results in properly selected degenerative arthritis patients. But the final outcomes of this study need further evaluation through long term follow-up.
Arthroplasty, Replacement, Knee ; Follow-Up Studies ; Humans ; Knee ; Methods ; Osteoarthritis ; Range of Motion, Articular ; Retrospective Studies ; Survival Rate

While there is little controversy about the surgical resection for the torn discoid lateral meniscus, there are some contradictory reports for the treatment of discoid lateral meniscus without tear. Some authors argue that initial treatment should be observation after diagnostic arthroscopy in the cases without tear. Others reported that excellent results were obtained after partial resection of the discoid lateral meniscus without tear or with slight degeneration. We reviewed our series of symptomatic discoid lateral menisci without tear, confirmed by arthroscopic examination. We retrospectively reviewed 8 knees in 8 patients who had had partia! Meniscectomy for discoid latera1 meniscus without tear, confirmed by arthroscopic examination. They were 5 males and 3 females. The average age was 22.8 years (range, 7 to 57 years). The average duration of follow-up was 2 years and three months. The patients had continuing pain and locking or snapping preoperatively. Preoperative MRI had grade Il intrameniscal signal in all the cases. The patients were evaluated hy Lysholm pain score and total Lysholm score. There were 7 complete types and one incomplete type. The average Lysholm pain score and the total Lysholm score improved from 13.1, 67.8 preoperatively to 28.8. 97.9, at the last follow-up, respectively. Mechanical symptoms including click and 1ocking were disappeared in all, and no complication was obser ved. We suggest that symptomatic discoid lateral meniscus should he resected e.ven though there is no tear visible on arthroscopy, especially when the MRl shows grade lI intrameniscal signal.
Arthroscopy ; Female ; Follow-Up Studies ; Humans ; Knee ; Magnetic Resonance Imaging ; Male ; Menisci, Tibial* ; Retrospective Studies

Panner's disease, osteonecrosis of the capitellum of the elbow, was first reported by Panner in 1927. The disease occurs mainly in boys between 6 and 15 years old and shows unilateral distribution. Pain, stiffness, localized tenderness over the lateral condyle of the elbow, and decreased range of motion are the typical clinical symptoms. Conservative treatment is generally recommended for patients in the early stage of this disease. A few cases of Panner's disease have been reported and few are related to long-term follow-up results. To the best of our knowledge, all reported cases were over six years. Therefore, we report on a five-year-old boy diagnosed as Panner's disease that showed resorption and regeneration of the humeral capitellum with no limitation of motion over three years. The current study was exempted from review by the institutional review board because it was a single retrospective case report. Informed consent was obtained from the patient's guardian.
Child* ; Elbow ; Ethics Committees, Research ; Follow-Up Studies ; Humans ; Informed Consent ; Male ; Osteochondrosis ; Osteonecrosis ; Range of Motion, Articular ; Regeneration ; Retrospective Studies

Results of 170 total knee arthroplasties(TKAs) performed from 1986 to 1995, followed up for at least one year, were reviewed. Lateral retinacular release was performed in 76 knees(45%) and not performed in 94 knees(55%). We compared the results of TKAs combined with lateral retinacular release with those without lateral retinacular release. The clinical results of TKAs were evaluated by the Knee Scoring System of Hospital for Special Surgery(HSS). The average follow-up period was 34 months. The clinical results assessed by HSS score, pain score and range of motion improved postoperatively in both groups, but there was no significant difference between the two groups. There were 8(4.7%) with patellar subluxations in 170 TKAs, one(1.3%) in the group with lateral retinacular release and 7(7.5%) in the group without lateral retinacular release(t-test; p<0.05). Analysis of lateral tilt of patella on roentgenographs also showed a significant difference between the two groups. 7 knees(9.2%) with lateral tilt were observed in the group with lateral retinacular release and 22 knees(23.4%) with lateral tilt in the group without lateral retinacular release(t-test; p<0.05). There was no osteonecrosis or fracture of patella in either group. In summary, lateral retinacular release might improve the patellar tracking and lower the incidence of patellar subluxation and lateral tilt of patella. Lateral retinacular release alone did not seem to cause patellar osteonecrosis and subsequent patellar fracture which were detectable in plain roentgenographs. So, we suggest that lateral retinacular release can be performed without great risk of potential patellar complications in TKAs requiring lateral retinacular release for proper patellar tracking.
Arthroplasty* ; Follow-Up Studies ; Incidence ; Knee* ; Osteonecrosis ; Patella ; Range of Motion, Articular

No abstract available.
Classification* ; Humans ; Spinal Cord* ; Urodynamics*

In order to identify the correlations between clinical results and quantitative data of gait analysis, we analyzed the results of 20 cases of total knee joint replacement arthroplasty in 15 patients with degenerative arthritis. We also evaluated the gait analysis of ten age-matched healthy candidates as a control group. Mean follow-up periods were 30 months. Clinical results included post-operative HSS (Hospital for Special Surgery) knee rating scores and the changes of the tibiofemoral angles. The three dimensional gait analysis included clinical assessment, video-taping, three dimensional kinematics and kinetics. The three dimensional kinematics were obtained using a 5 camera VICON system, and the three dimensional kinetic data was collected using two AMTI force plates. There was no statistical difference in linear parameters between the patient and control group. In patients group, however, double support time decreased as the HSS score increased, and range of knee motion and maximum knee flexion increased in accordance with the increase of pain score. Kinematic data of the patients group revealed that some parameters, such as knee flexion during loading response, knee flexion in swing phase, and knee varus during swing phase, were decreased. On the other hand, internal rotation of the knee from initial contact to initial swing was increased when compared with that of control group. There was no significant correlation between the degrees of tibiofemoral angle and coronal plane moment in the patients group. In three cases which showed mild varus instability post-operatively, knee flexion during loading response decreased and valgus moment in midstance increased as compared with the cases without instability. We believe that three dimensional gait analysis will be a good modality for evaluation of the results after total knee arthroplasty. With further accumulation of long term. follow-up data of gait analysis, we might be able to predict the long term results of total knee arthroplasty including possibility of loosening.
Arthroplasty* ; Arthroplasty, Replacement ; Biomechanical Phenomena ; Follow-Up Studies ; Gait* ; Hand ; Humans ; Kinetics ; Knee Joint ; Knee* ; Osteoarthritis

Traditionally, evaluation after ACL reconstruction has been focused on physical characteristics and measures of knee stability. Recently, however, reliance on such criteria has been refuted based on the lack of a strong relationship between these measures and both the patient s perception of knee function and return to sports activity. In present study, preoperative and postoperative physical examinations, isokinetic dynamometer, arthrometer test and functional tests were performed on 17 patients with chronic anterior cruciate ligament tears treated by arthroscopic reconstruction using autogenous bone-patellar tendon-bone graft with at least 1 year of follow-up. Muscle power, joint stability and functional recovery were checked for functional evaluation by specific methods. Lysholm score rating scale and functional tests (single leg hop test, vertical jump test, timed single jump test) were performed preoperatively and 6, 12 months postoperatively. Pivot-shift test, Lachman test, anterior drawer test, thigh circumference index and Cybex II+ isokinetic dynamometer test were done preoperatively and at 3, 6, 12 months postoperatively. KT-2000 arthrometer test was done at last follow-up. Lysholm score has showed increasing tendency at 6, 12 months postoperatively (p < 0.01). In Cybex study, deficit percentage of peak torque and total work of the quadriceps and hamstrings was same or slightly decreased at 3, 6 months, but have decreased at 1 year follow-up (p < 0.01). Functional tests and physical examinations have also showed improving tendency at 12 months (p < 0.01). Arthrometer test revealed no significant laxity of the knee joint at last follow-up. In conclusion, muscle strengh and functional capacity in ACL reconstructed knee showed significant improvement at postoperative one year compared with preoperative status. It was considered that arthroscopic reconstruction using autogenous bone-patellar tendon-bone graft is one of the useful method for chronic anterior cruciate ligament injury.
Anterior Cruciate Ligament ; Autografts* ; Bone-Patellar Tendon-Bone Grafts ; Follow-Up Studies ; Humans ; Humulus ; Joints ; Knee ; Knee Joint ; Leg ; Muscle Strength* ; Patellar Ligament* ; Physical Examination ; Sports ; Thigh ; Torque

The long-term studies of total knee arthroplasty (TKA) have confirmed reliable relief of pain and maintenance of function. However there have been few generalized studies of factors influencing the results of TKA. We evaluated retrospectively 187 TKAs (137 patients) which had been performed between January 1987 and May 1995. The follow-up period was from one year to eight years (mean, 3 years and 8 months). There were 133 knees of osteoarthritis (OA), 43 knees of rheumatoid arthritis (RA) and 11 knees of other causes including septic knee sequelae. We considered the preoperative factors as age, sex, side (right or left), body weight, height, primary disease, flexion contracture (FC), further flexion (FF), range of motion (ROM) of joint, deformity of varus and valgus and pain score, muscle strength score, instability score, total knee score according to the knee rating scale of the Hospital for Special Surgery (HSS). We considered the clinical results as FC, FF, ROM, pain, muscle strength, instability, total knee score according to the knee rating scale of the HSS and the radiological results as Roentgenographic Evaluation and Scoring System of American Knee Society and radiolucent line more than 2mm in width. We evaluated the clinical and radiological results of TKAs followed up more than I year and analyzed the results based on above factors. The results were as follows: 1. The preoperative factors influencing final FC were not the primary disease and FC, but the FF and ROM. The preoperative factors influencing final FF and ROM were the primary disease, the FF and ROM. 2. The pain, muscle power, instability scores were improved but there was no significant factor influencing them. The HSS knee scores were higher in OA group than RA group postoperatively. 3. There was no preoperative factor influencing the complication, revision, the radiological results. The preoperative factors influencing the results of TKA were the FF, ROM and the primary disease.
Arthritis, Rheumatoid ; Arthroplasty* ; Body Weight ; Congenital Abnormalities ; Contracture ; Follow-Up Studies ; Joints ; Knee* ; Muscle Strength ; Myalgia ; Osteoarthritis ; Range of Motion, Articular ; Retrospective Studies

Nineteen revision total knee arthroplasties (TKAs) performed from March 1991 to March 1995 were evaluated to determine the clinical and roentgenographic results and the problems in revision TKA. The mean age was 63 years (range, 23-85 years) and the mean follow-up time was 19 months (range, 12 months-4.4 years). The primary revisions were done in eighteen knees and a re-revision, in one. Four revision TKAs were performed for failed unicompartmental arthroplasty and fifteen, for failed TKA. The mean interval from initial to revision TKA was 4.1 years (range, 3.3 years-5 years) in failed unicompartmental arthroplasty and 5.7 years (range, 4 months-14 years) in failed TKA. The initial diagnosis was degenerative arthritis in 16 knees, tuberculous arthritis in two and rheumatoid arthritis in one. The main cause of revision for both of the failed unicompartmental arthroplasties and failed TKAs was aseptic loosening. The HSS knee score improved from 43+/-14 to 82+/-7 in the failed unicompartmental arthroplasties and from 46+/-16 to 79+/-14 in the failed TKAs. The clinical success rate of revision TKA was 78%. The coronal tibiofemoral angle improved from valgus 0.2degrees to valgus 5.1degrees. At final follow-up, radiolucent line greater than 2mm in width was found around femoral component in one knee. In our series, four complications were occurred. One knee was fused due to mas-sive bone loss and ipsilateral femur shaft fracture. Deep wound infections were developed in two knees and loss of fixation after tibial tuberosity osteotomy in one. In conclusion, significant improvements of clinical and radiological results were achieved in revision TKA but the success rate was relatively low and the complication rate was relatively high compared with primary TKA. So, especially appropriate skillful surgical techniques and postoperative cares were required to overcome the soft tissue problem and infection which was encountered in revision TKA.
Arthritis ; Arthritis, Rheumatoid ; Arthroplasty* ; Diagnosis ; Femur ; Follow-Up Studies ; Knee* ; Osteoarthritis ; Osteotomy ; Wound Infection