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1.  Results of Microfracture in the Osteoarthritic Knee with Focal Full-Thickness Articular Cartilage Defects and Concomitant Medial Meniscal Tears 
To evaluate the efficacy of arthroscopic microfracture in patients with focal full-thickness cartilage defects in the osteoarthritic knee.
Materials and Methods
Seventy-six patients were enrolled in this study. They were divided into group I (n=38) who underwent microfracture plus meniscectomy and group II (n=38) who underwent only meniscectomy. Clinical and radiological evaluations were performed.
At the time of the three-year follow-up, a total of five failures (6.6%) were reported: four patients in group I and one in group II. The two groups showed no significant difference in the Lysholm score, the Tegner activity score and the visual analog pain scale score at three years after surgery. However, at the time of the three-month follow-up, group II showed significantly more improvement in the Tegner activity and the visual analog pain score compared with group I.
In the osteoarthritic knee, additional microfracture did not confer any additional benefit to meniscectomy.
PMCID: PMC3671119  PMID: 23741702
Knee; Cartilage; Osteoarthritis; Microfracture
2.  Medial Meniscal Tears in Anterior Cruciate Ligament-Deficient Knees: Effects of Posterior Tibial Slope on Medial Meniscal Tear 
Knee Surgery & Related Research  2011;23(4):227-230.
To evaluate the incidence of meniscal tears in patients with chronic anterior cruciate ligament (ACL)-deficient knees, and to determine the influence of posterior tibial slope (PTS) on medial meniscal tears in ACL-deficient knees.
Materials and Methods
We reviewed 174 patients (174 knees) with a mean age of 30.7 years who underwent ACL reconstruction for chronic ACL tears. We divided the patients into two groups: low group (135 knees with a PTS<13°) and high group (39 knees with a PTS≥13°).
The incidence of medial meniscus tears was 44% (77/174), and that of lateral meniscus tears was 35% (61/174). The mean PTS in patients with medial meniscal tears was 11.4°±3.0°, whereas that in patients without medial meniscal tears was 9.8°±2.4°. The incidence of meniscal tears was 57.8% (78/135) in the low group and 89.7% (35/39) in the high group (p<0.001).
Our data demonstrate that PTS≥13° is a risk factor for secondary medial meniscal tears in ACL-deficient knees. So, we suggest that PTS is one of the considerations for determining early ACL reconstruction to prevent secondary meniscal tears.
PMCID: PMC3341801  PMID: 22570839
Chronic anterior cruciate ligament deficient knee; Medial meniscal tear; Posterior tibial slope
3.  Ligament Reconstruction in Congenital Absence of the Anterior Cruciate Ligament: A Case Report 
Knee Surgery & Related Research  2011;23(4):240-243.
Congenital absence of the cruciate ligament is an extremely rare condition that was first reported in Giorgi's radiographic study in 1956. The authors report on a case of anterior cruciate ligament reconstruction performed on a 21-year-old female patient with congenital anterior cruciate ligament absence. We also discuss radiographic evidence that could provide clues to the congenital absence and possible difficulties that may be encountered during surgery with a review of the relevant literature.
PMCID: PMC3341811  PMID: 22570842
Anterior cruciate ligament; Congenital absence; Anterior cruciate ligament reconstruction
4.  Characteristics of Radial Tears in the Posterior Horn of the Medial Meniscus Compared to Horizontal Tears 
Clinics in Orthopedic Surgery  2011;3(2):128-132.
The clinical and radiologic features of radial tears of the medial meniscus posterior horn were compared with those of horizontal tears.
From January 2007 to December 2008, 387 consecutive cases of medial meniscal tears were treated arthroscopically. Among these, 91 were radial tears in the medial meniscus posterior horn, and 95 were horizontal tears in the posterior segment of the medial meniscus. The patients' data (age, gender, duration of symptom, body mass index, and injury history), radiographic findings (Kellgren and Lawrence score, posterior tibial slope, and femorotibial angle), and chondral lesions were recorded.
The patient factors of age, gender, and body mass index were related to radial tears of the medial meniscus posterior horn. Radial tears were significantly correlated with Kellgren and Lawrence score, varus alignment, posterior tibial slope, and severity of the chondral lesion.
Radial tears of the medial meniscus posterior horn are a unique clinical entity that are associated with older age, females and obesity, and are strongly associated with an increased incidence and severity of cartilage degeneration compared to horizontal tears.
PMCID: PMC3095783  PMID: 21629473
Radial tear; Horizontal tear; Medial meniscus; Posterior horn
5.  Delayed Onset Neurological Deterioration due to a Spinal Epidural Hematoma after a Spine Fracture 
Asian Spine Journal  2007;1(2):98-101.
There are no reports of a 7-day delay in the onset of neurological deterioration because of a spinal epidural hematoma (SEH) after a spinal fracture. A hematoma was detected from the T12 to L2 area in a 36-year-old male patient with a T12 burst fracture. On the same day, the patient underwent in situ posterior pedicle instrumentation on T10-L3 with no additional laminectomy. On the seventh postoperative day, the patient suddenly developed weakness and sensory changes in both extremities, together with a sharp pain. A MRI showed that the hematoma had definitely increased in size. A partial laminectomy was performed 12 hours after the onset of symptoms. Two days after surgery, recovery of neurological function was noted. This case shows that spinal surgeons need to be aware of the possible occurrence of a delayed aggravated SEH and neurological deterioration after a spinal fracture.
PMCID: PMC2857477  PMID: 20411132
Spinal epidural hematoma; Spine fracture; Neurology

Results 1-5 (5)