The purpose of this study was to investigate the effect that three resin indexing materials had on the distortion of split cast in the procedures of solder indexing and block fabrication. The specimen had two cylinders and connecting bar. Two cylinders were a reference cylinder and a test cylinder that were machined precisely and placed on metal base. The total of specimens wee 30 and they were divided into 3 groups according to the resin indexing materials : Acrylic solder , G-C Pattern resin , Z-100 . The relative coordinates (X, Y, Z) of centroids of both cylinders were measured by using 3-D coor dinates measuring machine. The value of indexing distortion was obtained after application of indexing material, and the value of the block distortion was obtained after fabrication of soldering block, and the value of total distortion was a value sum of indexing distortion and block distortion. Intercentroidal linear distortion({{{{ SQRT {X'^2 + Y'^2 +Z'^2 }- SQRT {X^2 + Y^2 +Z^2} }} }}) and global distortion {{{{rm SQRT {(X'-X)^2 +(Y'-Y^)2 +(Z'-Z^)2} }} }} were calculated from data of coordinates of centroids at each mea s u r ing stages. The results of this study were as belows ; 1. The intercentroidal distance between the split casts was reduced by indexing distortion and increased by block distortion. 2. The indexing global distortion between the split casts was smaller than block global distortion. 3. The intercentoidal linear distortion and the global distortion were no significant difference between indexing materials.
Abstracting and Indexing as Topic

Hepatolithiasis is characterized by its intractablity and frequent recurrence that requires multiple operative and non-operative interventions. To clarify the optimal treatment modalities and their effectiveness, a total of 648 patients with hepatolithiasis and who had treated at Seoul National University Hospital between January 1981 and December 2005 were analyzed according to the different time periods. Hepatectomy as a primary treatment of hepatolithiasis has gradually increased and become the major treatment modality in the recent 10 years, while choledocholithotomy and drainage procedures have decreased. New treatment modalities such as percutaneous choledochoscopic stone removal (PTCS) and laparoscopic liver resection were instituted during the past decades. Over the last 25 years, both advances in the operative stone clearance rate and the success rate of postoperative lithotripsy have resulted in an improved final stone clearance rate, and this has been progressive from 79.0% in the first period to 91.3% in the fifth period. In the last 10 years, the final clearance rate of hepatectomy, choledocholithotomy, drainage procedures and PTCS was 97.1%, 82.0%, 78.8% and 85.7%, respectively, and the rate of performing repeated hepatectomy, choledocholithotomy, drainage procedures and PTCS was 11.2%, 26.2%, 9.1% and 28.6% respectively. Hepatolithiasisassociated cholangiocarcinomas were found in 24 (4.7%) patients (1991-2005, n=512), and 5 of them were diagnosed after 5 years of follow-up. Histopathologic examinations of the resected livers showed various degrees of pathologies from proliferative cholangitis and hyperplasia through dysplasia and cholangiocarcinoma. Therefore, a suspicion of malignancy and long term follow-up are needed for managing the patients who suffer with hepatolithiasis.
Cholangiocarcinoma ; Cholangitis ; Drainage ; Factor IX ; Follow-Up Studies ; Hepatectomy ; Humans ; Hyperplasia ; Lithotripsy ; Liver ; Recurrence

PURPOSE: Treatment of hepatolithiasis is difficult because of the high recurrence rate, and the long-term outcome is not satisfactory. We reviewed clinical outcomes to determine the optimal treatment modalities for hepatolithiasis. METHODS: Between 1981 and 2005, 648 patients with hepatolithiasis were treated at our institute. Changing patterns of treatment modalities and outcomes were analyzed for the periods: 1st (1981~1985; n=159), 2nd (1986~1990; n=100), 3rd (1991~1995; n=111), 4th (1996~2000; n=141), and 5th (2001~2005; n=137). Clearance and recurrence rates according to the treatment modalities and associated malignancies were analyzed in patients for the most recent 10 years. RESULTS: During the past 25 years, hepatectomy as a treatment for hepatholithiasis has increased in frequency and become the major treatment modality in the recent 10 years, while choledocholithotomy and drainage procedures have decreased in frequency. With improvement in operative clearance and post-operative lithotripsy, the final clearance rate improved from 79.0% to 91.3%. In the most recent 10 years, the final clearance rate of hepatectomy, choledocholithotomy, cholangioenterostomy, and PTCS was 97.1%, 82.0%, 78.8%, and 100%, respectively, and the recurrence rate was 34.7%, 15.4%, 17.0%, and 42.9%, respectively. Twenty-six patients (47.2%) had recurrences within 2 years, and 12 patients (21.8%) had recurrences after 5 years. Cholangiocarcinomas occurred in 10 patients (3.6%). The diagnosis of cholangiocarcinoma was established pre-operatively in 2 patients, post-operatively in 4 patients, and during the follow-up period in 4 patients. CONCLUSION: In the treatment of hepatolithiasis, hepatectomy has a high clearance rate and a low recurrence rate. To reduce the recurrence rate, complete stone clearance without residual stones seems to be of utmost importance. Suspicion of malignancy and long-term follow-up are needed in the management of patients with hepatolithiasis.
Cholangiocarcinoma ; Drainage ; Factor IX ; Follow-Up Studies ; Hepatectomy ; Humans ; Lithotripsy ; Recurrence

No abstract available.
Carcinoma, Renal Cell* ; Melena*

Malignant peripheral nerve sheath tumor (MPNST) is rare, soft tissue, spindle cell sarcoma of an ectomesenchymal origin. MPNSTs frequently occur in the extremities and trunk, whereas there has been only one previous report of MPNST originated from the pancreas. A 55-yr-old previously healthy man was admitted for a pancreas head mass, which was detected during a routine health inspection. Fine needle aspiration biopsy showed atypical cells that were suspicious for malignancy. On open exploration, a 2.6cm sized hypervascular well capsulated mass was seen between the duodenal first portion and the pancreas head, and so enucleation was performed. The tumor was composed with spindle cells without a typical storiform pattern and the cells were positive for mesenchymal antigen, S-100 and vimentin, whereas they were negative for epithelial membrane antigen and cytokeratin. It was concluded that the tumor was a MPNST with perineural cell differentiation. Primary MPNST of the pancreas is extremely rare and performing immunohistochemical staining is necessary for making its diagnosis.
Biopsy ; Biopsy, Fine-Needle ; Cell Differentiation ; Extremities ; Head ; Keratins ; Mucin-1 ; Nerve Sheath Neoplasms ; Pancreas ; Peripheral Nerves ; Sarcoma ; Vimentin

Splenic rupture during laparoscopic cholecystectomy is a rare and unusual complication. We report a case of accessory splenic rupture that occurred during laparoscopic cholecystectomy. A 63-year-old male patient underwent laparoscopic cholecystectomy due to acute cholecystitis. After pneumoperitoneum was established, hemoperitoneum was detected. However, a bleeding focus was not found by laparoscopic whole abdominal exploration after laparoscopic cholecystectomy. Twenty-four hours later the patient became hypotensive and laparoscopic reexploration was performed. Hematoma and omental adhesion was detected around accessory spleen. Laparoscopic accessory splenectomy was performed. Distortion or stretching of perisplenic adhesion due to the induction of pneumoperitoneum possibly resulted in sudden splenic rupture and hemoperitoneum.
Cholecystectomy, Laparoscopic ; Cholecystitis, Acute ; Hematoma ; Hemoperitoneum ; Hemorrhage ; Humans ; Male ; Middle Aged ; Pneumoperitoneum ; Rupture, Spontaneous ; Spleen ; Splenectomy ; Splenic Rupture

Pancreas-sparing total duodenectomy (PSTD), which allows preservation of the pancreas in its entirety is a promising procedure for benign or premalignant lesions at duodenum without invading the pancreas. We report two cases of tubular adenoma of Ampulla of Vater and a GIST of duodenum, which were resected by PSTD. The proximal duodenum was transected at 2 cm distal of pylorus and the distal end was cut in the distal portion of the Treitz ligament. The proximal jejunal limb was used for biliary-pancreatic duct systems reconstruction with end-to-side anastomosis and distal jejunum was anastomosed to duodenal bulb with an end-to-side anastomosis. Although a pancreatic fistula occurred in one patient, it was improved by conservative management. PSTD is a challenging surgical technique and requires excellent knowledge of anatomy. If performed for appropriate indications, PSTD is a useful alternative to formal pancreatoduodenecotmy and can be done safely with gastrointestinal function maintained.
Adenoma ; Ampulla of Vater ; Duodenum ; Extremities ; Humans ; Jejunum ; Ligaments ; Pancreas ; Pancreatic Fistula ; Pylorus

PURPOSE: We measured the BMD (bone mineral density) of elderly patients with hip fracture in order to understand the relationship between osteoporosis and hip fracture, and also to suggest a reference point for starting an osteoporosis treatment program. MATERIALS AND METHODS: From February 2004 to April 2007, we investigated 172 elderly hip fracture patients. Their BMD was checked by DEXA (Hologic QDR-4500w, S/N 49492) at the proximal femur and at the 1st to 4th lumbar vertebrae. The average T-score of the hip fracture patients and the fracture threshold was calculated. RESULTS: The average BMD of the patients with hip fracture was -2.63 of the T-score in the proximal femur and - 2.95 of that in the lumbar vertebrae. The BMD in the patients with intertrochanteric fracture was significantly decreased compared to that of femur neck fracture (p=0.04, 0.19). For the femur neck fracture patients, the BMD of the displaced group was decreased compared to that of the undisplaced group (p=0.04, 0.01). The fracture threshold was -1.29 of the T-score in lumbar vertebrae, and the fracture threshold was -1.15 in the proximal femur. CONCLUSION: The BMD in elderly patients with hip fracture was significantly decreased compared that of normal people. For the prevention of hip fracture in elderly patients, we propose that the aggressive treatment of osteoporosis should be started for patients with a T-score less than -1.5.
Aged ; Femoral Neck Fractures ; Femur ; Hip ; Hip Fractures ; Humans ; Lumbar Vertebrae ; Osteoporosis

PURPOSE: We compared the outcomes of primary consecutive THAs performed via the direct lateral approach through minimally invasive incisions (<8 cm) and through standard incisions (15~20 cm). MATERIALS AND METHODS: Eighty primary consecutive THAs were performed via direct lateral approach through minimally invasive incisions or through standard size incisions. The standard incision is Hardinge's direct lateral approach. For the MIS group, an approximately 8 cm long oblique skin incision was made centered at the tip of the greater trochanter and running anterosuperiorly to posteroinferiorly. RESULTS: The surgical time was shorter (p=0.03) and the average amount of Hemovac drainage was smaller (p=0.02) in the MIS group. Alignment of the femoral stem and acetabular cup, post-operative pain and limping, HHS, and infection rate were no different between the two groups. In the MIS group, two complications (5.0%) occurred (one lateral positioning of the acetabular cup, one intra-operative acetabular fracture), and one varus stem insertion occurred. CONCLUSION: Minimization of the skin incision length for primary THAs performed via the direct lateral approach appears to have benefits with regard to shortening the wound closing time and decreasing the amount of postoperative Hemovac suction drainage. However, the minimally exposed operative field raises technical problems, so sufficient surgical experience and training are required.
Aldosterone ; Arthroplasty ; Drainage ; Femur ; Hip ; Operative Time ; Running ; Skin ; Suction ; Tacrine

Diaphyseal unicameral bone cysts of the long bone are generally known to originate near the growth plate and migrate from the metaphysis to the diaphysis during skeletal growth. In the case of unicameral bone cysts of diaphyseal origin, recurrence at the same location is extremely rare. We report a case of recurrence of a unicameral bone cyst in the diaphysis of the femur that developed 8 years after treatment with curettage and bone grafting. We performed bone grafting and lengthening of the affected femur with an application of the Ilizarov apparatus over an intramedullary nail to treat the cystic lesion and limb length discrepancy simultaneously.
Bone Cysts* ; Bone Transplantation ; Curettage ; Diaphyses* ; Extremities ; Femur ; Growth Plate ; Recurrence*