1/8. Intra-articular dislocation of the patella: two cases and literature review.Intra-articular dislocation of the patella remains uncommon and is generally thought to be a problem of young adolescent males. This report reminds emergency physicians that it can occur in the arthritic knee, and it should be considered in the differential diagnosis of locked knee in the elderly. Closed reduction should be attempted in these cases, because the dislocation is liable to be held in place by osteophytes rather than impaction of the patella deep in the intercondylar notch and a good functional outcome can be expected.- - - - - - - - - - ranking = 1keywords = dislocation (Clic here for more details about this article) |
2/8. Arthroscopic removal of a loose body osteophyte fragment after superior patellar dislocation with locked osteophytes.The authors report the case of a loose body from a fractured osteophyte after a superiorly dislocated patella with locked osteophytes. Few cases of superiorly dislocated patellae have been reported in the literature and no cases of osteophyte fracture fragments after locked osteophytes with subsequent arthroscopic loose body removal have been reported. The loose body was removed and the distal pole of the patella was debrided arthroscopically. This patient and the majority of previously reported cases, herein reviewed, had patella alta with pre-existing patellofemoral arthrosis. Patella alta in the face of patellofemoral arthrosis should be considered a risk factor for loose body formation. Therefore, recurrent superior patellar dislocation and locking osteophytes may be a relative indication for pre-emptive arthroscopic debridement of locked osteophytes.- - - - - - - - - - ranking = 0.83333333333333keywords = dislocation (Clic here for more details about this article) |
3/8. Total knee arthroplasty for neglected permanent post-traumatic patellar dislocation--case report.Permanent post-traumatic patellar dislocation is a rare entity resulting from recurrent trauma. This uncommon condition is often confused clinically with congenital dislocation of the patella. Treatment options, although not well defined, include observation, various soft tissue and bony procedures for realigning the patella and patellectomy. To our knowledge, this is the first case reporting the use of conventional non-constrained total knee arthroplasty with patellar resurfacing and soft tissue realignment procedure for long-standing patellar dislocation in a single stage. An interesting feature of this case was the patient's ability to function reasonably well for nearly 40 years with a dislocated patella until the development of secondary osteoarthritis, and the surprisingly good recovery after total knee replacement.- - - - - - - - - - ranking = 1.1666666666667keywords = dislocation (Clic here for more details about this article) |
4/8. Recurrent dislocation of total knee arthroplasty: an unusual cause.We report an unusual case of recurrent dislocation of posterior stabilized total knee arthroplasty (TKA) secondary to fracture of the polyethylene insert. Recurrent dislocation occurred 21 months after primary TKA. Fractured polyethylene insert was noted as an abnormal radiolucent shadow on postoperative radiographs and was confirmed by an arthrogram. At revision surgery, disintegration of the insert, including the tibial post, was found. We recommend careful scrutiny of the integrity of the polyethylene insert at the time of follow-up evaluation in cases of TKA dislocation.- - - - - - - - - - ranking = 1.1666666666667keywords = dislocation (Clic here for more details about this article) |
5/8. Recurrent inferior patellar dislocation in an osteo-arthritic knee.A case of inferior dislocation of the patella in an 80-year-old woman with an osteo-arthritic knee is presented. This is a rare injury in the degenerate knee and the first case in which recurrence, the need for operative reduction and intra-articular damage has been demonstrated.- - - - - - - - - - ranking = 0.83333333333333keywords = dislocation (Clic here for more details about this article) |
6/8. Superior dislocation of the patella with early onset patellofemoral arthritis: a case report and literature review.Among the traumatic patellar dislocations, superior dislocation of patella without patellar ligament injury is very rare. We present in this article, a case of superior dislocation of the patella trapped by interlocked osteophytes in a 38-year-old female who had concurrent bilateral knee arthrosis. Successful reduction was achieved by closed manipulation without anesthesia. Neither redislocation nor symptoms of instability was seen after 36 months of follow-up, although some progression of arthritis was observed. A new classification including all traumatic patellar dislocation was also proposed.- - - - - - - - - - ranking = 1.5keywords = dislocation (Clic here for more details about this article) |
7/8. Permanent patellar dislocation and osteoarthritis of the knee after femoral fracture in childhood. A case report.A 52 year-old woman suffered bilateral femoral shaft fractures when she was 5 years old and they were treated surgically. She had been able to walk without pain and giving way throughout her young and adult life, however, when she came to us with a 1-year history of the right knee pain, she could walk only 10 m continuously. The right knee revealed valgus deformity with complete lateral patellar dislocation. The femoro-tibial angle was 154 degrees and arthritic change was seen in the femorotibial joint. Surfaces of both the patella and the femur were degraded. Twenty-two degrees of rotational deformity was also found internally in the involved side. Varus osteotomy with external rotation of the distal fragment and lateral retinacular release combined with reefing of vastus medialis muscle were performed. Twenty-four months after surgery, knee score and functional score were, respectively, 85/100 and 71/100, using knee society clinical rating system and there was no pain associating patella incongruity.- - - - - - - - - - ranking = 0.83333333333333keywords = dislocation (Clic here for more details about this article) |
8/8. Fracture of the tibial tray after total knee arthroplasty.We report a case in which fracture of the metal tibial plate was thought to be caused by a combination of neutral anatomic rotation of the femoral component and an undersized tibial plate. This resulted in medial subsidence and baseplate fracture with loosening of the polyethylene and dislocation of the prosthesis.- - - - - - - - - - ranking = 0.16666666666667keywords = dislocation (Clic here for more details about this article) |