No abstract available.
Spine*

No abstract available.

Authors reviewed 42 fractures of distal tibia fixated with Ender nails(24 cases) or Interlocking nails(18 nails) at the Chosun university Hospital from 1986 to 1992. The purpose of this study is to compare the bony union, the complications and the functional results of two groups(Ender nailing group and Interlocking nailing group). The follow-up period was average 19 months(range, 12 to 36 months). The results were as follows 1. The most common causes of the injury were traffic accidents(36 cases). 2. In the Ender nailing group, 8 cases are closed fractures and 16 cases are open fractures. Among 24 cases, 14 cases are simple fractures and 10 cases comminuted fractures. In interlocking nailing group, 7 cases are closed fracture and 11 cases are open fractures. Among 18 cases, 8 cases are simple fractures and 10 cases are comminuted fractures. 3. The average radiologic union was obtained at 19.3 wks in Ender nailing group, and 18.1 wks in interlocking nailing group. 4. Major complication was a delayed union in both group(5 cases-Ender nailing group, 3 cases-Interlocking group). 5. According to the criteria of functional results by Klemm and Borner, we obtained a 87.5% of Excellent and good results in Ender nailing group(21 out of 24 cases) and 94.4% of Excellent and good results in Interlocking group(17 out of 18 cases). 6. There was no significant difference between the two groups in stable fractures of distal tibia, so we suppose that Ender nailing is a good technique in these cases due to its simplicity and the economic price. But in more unstable fractures such as long oblique, spiral and comminuted fractures, we think that intramedullary interlocking nailing is better due to its stability.
Follow-Up Studies ; Fracture Fixation, Intramedullary ; Fractures, Closed ; Fractures, Comminuted ; Fractures, Open ; Tibia

No abstract available.
Animals ; Cyclophosphamide* ; Food Deprivation* ; Mice*

No abstract available.
Animals ; Cyclophosphamide* ; Food Deprivation* ; Mice*

Proliferating trichilemmal tumor is a relatively uncommon tumor which develops preferentially as a solitary tumor on the scalp of elderly women. Histologically, the tumor i epresents a proliferation of the outer root sheath epithelium in a characteristic pattern, but the presense of cellular atypia, dyskera.totic cells and mitotic figures may lead to a false impression of squamous cell carcinoma. We report a case of proliferating trichliemmal tumor in a 70-yeiir-old male who presented with a slowly growing tumor on his right inguinal area for 2 years. This case is unusual in that the tumor occurred on the inguinal are anoher than the scalp in a male.
Aged ; Carcinoma, Squamous Cell ; Epithelium ; Female ; Humans ; Male ; Scalp

No abstract available.
Fracture Fixation, Intramedullary*

No abstract available.
Forearm* ; Humerus*

The bone is the dynamic living tissue which is always maintained bone mineral content by bone resorption and formation. It has been well known that the bone mineral content is decreased very slowly with aging. It is very difficult to diagnose the osteopenia because it is almost subclinical. Another important problem in the osteopenia is the fracture occurring spontaneously. The quantitative method of bone mineral mass provide an information to diagnose the osteopenia and predict the risk of spontaneous fracture. Various methods have been used to access the degree of bone atrophy but have not been routinely available for clinical application in the hospital. The microdensitometric method is a noninvasive, easy, accurate, and objective one to monitor the degree of changes in the skeletal mass quantitatively. So, we measured the 7 indices at the middle site of the 2nd metacarpal bone with a microdensitometer and computer on an X-ray film of the hands and studied the correlations between the age and indices of those under 30 and over 30 yrs old in healthy and fracture groups. The results were obtained as follows : 1. There was a significant high correlation between age and indices in healthy and fracture groups. 2. The measurement of age by microdensitometric method was highly correlated with the chronological age. 3. Comparing both groups, There was a significant correlation of D (P<0.001), MCI(P<0.01), and d (P<0.01) over 30 yrs in male and GSmin (P<0.001) and ΣGS/D (P<0.01) over 30 yrs in female. 4. In fracture group, 1) The index of bone width(D) was slightly larger than in the healthy group. 2) The metacarpal index(MCI) was lower than in the healthy group. 3) The index of medulla width(d) was wider than in the healthy group. 4) The density index of cortex(GSmax) was smaller than in the healthy group. 5) The density index of cortex and medulla(GSmin) was smaller than in the healthy group. 6) There was no considerable difference in ΣGS/D between healthy and fracture groups. 7) The densitometric pattern was more aggrevated than in the healthy group.
Aging ; Atrophy ; Bone Density ; Bone Diseases, Metabolic ; Bone Resorption ; Female ; Fractures, Spontaneous ; Hand ; Humans ; Male ; Methods ; Miners ; Radiography ; X-Ray Film

One of various decompression methods in treatment of spinal stenosis is the indirect instrumental decompression. Theoretically, the distraction of the disc space can widen the intervertebral foramen of the stenotic segment and even increase the canal diameter by distracting the posterior annulus as well as reduce the extent of decompressive laminectomy site. The indirect instrumental decompression, however, was not guaranteed to maintain the restored discal height because of the loss of fixation strength between rod and screw, viscoelasticity of vertebra itself, bone density, type of screw and rod, and operative technique. As well the magnitude of the stresses on the instrumentation particularly at the rod-screw interface may depend on rod-contouring in order to make mormal sagittal curvature of the lumbar spines. Therefore, the aim of this experimental study was to evaluate the effect of different rod-contour on the axial sliding strength in Compact Cotrel-Dubousset (CCD) instrumentation. Axial sliding strength was tested by Universal Test Machine (Instron). Test was performed for 3 groups of different rodcontouring on the biomechanical axial strength: straight rod (no contour), 10 and 20 contouring rod. The length of contact surface between rod and screw was measured with Fuji pressure sensitive film. The study was performed using 6.5 mm open body screws and 7 mm rods of CCD instrumentation. Axial sliding strength of straight rod was 2518.6N, 1871.8N in 10 and 1528.8N in 20 contouring rod. The length of contact surface between rod and screw significantly decreased according to degree of rod contouring; 9.88mm in straight rod, 9.08mm in 10 and 8.57mm in 20 contouring rod. There was a statistically significant linear correlation (R=0.96) between failure load and length of contact surface. Therefore, this study has shown that excessive contour of the rod in order to make normal sagittal curvature of the lumbar spine using CCD instrumentation cannot provide sufficient axial sliding strength. That may be a cause of loss of restored disc space height after surgery.
Bone Density ; Decompression ; Laminectomy ; Spinal Stenosis ; Spine