Demineralized homogenous bone matrix is reported to have no antigenic activity and its osteoinductive prcoess is faster than that of undemineralized homogenous bone. The present authors studied on the osteoinduction of demineralized human osteosarcoma in rat's muscle pouch. The results showed that demineralized human osteosarcoma tissue can induce new bone though there were inflammatory signs and giant. cell reaction. The osteoinductive process seemed to be delayed compared to that of demineralized homogenous bone matrix. The authors believed that further immunological investigations are needed to clarify the cause of these tissue response.
Bone Matrix ; Humans ; Osteosarcoma

Cysticercosis which very rarly involves spinal canal, may show symptoms similar to herniated nucleus pulposus and cord tumor, and even myelogram may not be helpful for the accurate diagnosis. In this paper, a case in which free floating larvae of taenia solium mimicking intradural tumor by myelogram and clinical symptoms were presented. The present authors feel that cysitcercosis has to be considered as a cause when there is central filling defect of contrast media in myelogram.
Contrast Media ; Cysticercosis ; Diagnosis ; Larva ; Spinal Canal ; Spine ; Taenia solium

Hepatitis A is usually a self-limited liver disease that is treated conservatively. Acute renal injury complicating acute hepatitis A in the absence of fulminant hepatic failure is rare. We experienced a 33-year-old man who was healthy, and did not know that he was a hepatitis B virus (HBV)carrier with non-fulminant hepatitis A. He developed an acute kidney injury that necessitated dialysis therapy and a renal biopsy. He recovered within about 1 month. Pathologically, the renal biopsy showed acute tubular necrosis. It also showed IgA nephropathy and mesangium proliferation with glomerular nephritis, which are seen in chronic viral hepatitis B. We describe the association of acute hepatitis A with acute kidney injury and report the pathological findings of a renal biopsy related to chronic hepatitis B in an acute hepatitis A patient discovered by chance.
Acute Kidney Injury ; Adult ; Biopsy ; Dialysis ; Glomerulonephritis, IGA ; Hepatitis ; Hepatitis A ; Hepatitis B ; Hepatitis B virus ; Hepatitis B, Chronic ; Hepatitis, Chronic ; Humans ; Liver Diseases ; Liver Failure, Acute ; Necrosis ; Nephritis

Traditional options for posterior edentulous treatment include removable partial dentures and implant fixed prostheses. Recently, the concept of implant assisted removable partial denture, in which two treatments are fused, has been introduced in consideration of systemic health and patient's needs, costs, residual alveolar bone status and so on. Implant assisted removable partial denture has the advantage of increasing the retention and stability of the denture and improving its esthetics in cases of large bone defects or biomechanical disadvantages. In addition, it is possible to strategically place the implants in a site where the alveolar bone is relatively sufficient, thereby overcome the limit of the conventional removable partial denture design as well as reducing the burden on a wide range of implant surgery. Cost reduction is also expected. In this case, the patient was treated by placing the implant in both premolar sites of the mandible and fabricating the distal extension removable partial denture with the implant fixed prosthesis as an abutment. After delivering the definitive prosthesis, the patient showed satisfaction with the masticatory function and esthetics. and has been regularly followed-up for more than one year. The following 20-months follow-up case report describes the design of an implant-assisted-removable partial denture (IARPD) in which two cementretained implant crowns used to provide support and stability.
Bicuspid ; Crowns* ; Denture, Partial ; Denture, Partial, Removable* ; Dentures ; Esthetics ; Follow-Up Studies* ; Humans ; Mandible ; Prostheses and Implants

In patients with unstable mandibular movements who are accompanied by involuntary facial muscle movements and asymmetrical changes in the facial features, many difficulties exist in determining the vertical dimension of occlusion, recording centric relation, and transferring information about the occlusal plane. In this case, for a patient with unilateral facial nerve palsy who was edentulous for a long period of time, a CAD-CAM provisional prosthesis was fabricated using a 3D printing customized gothic arch tracer and a prefabricated occlusal plane recorder, the POP bow system, to achieve a stable interarch relationship. Afterwards, a full mouth implant fixed prosthesis was fabricated by delivering an appropriate vertical dimension of occlusion, a reproducible centric relation, and a correct three-dimensional occlusal plane, and continuous maintenance was performed to restore functional and aesthetic oral health to the patient.

In patients with unstable mandibular movements who are accompanied by involuntary facial muscle movements and asymmetrical changes in the facial features, many difficulties exist in determining the vertical dimension of occlusion, recording centric relation, and transferring information about the occlusal plane. In this case, for a patient with unilateral facial nerve palsy who was edentulous for a long period of time, a CAD-CAM provisional prosthesis was fabricated using a 3D printing customized gothic arch tracer and a prefabricated occlusal plane recorder, the POP bow system, to achieve a stable interarch relationship. Afterwards, a full mouth implant fixed prosthesis was fabricated by delivering an appropriate vertical dimension of occlusion, a reproducible centric relation, and a correct three-dimensional occlusal plane, and continuous maintenance was performed to restore functional and aesthetic oral health to the patient.

In patients with unstable mandibular movements who are accompanied by involuntary facial muscle movements and asymmetrical changes in the facial features, many difficulties exist in determining the vertical dimension of occlusion, recording centric relation, and transferring information about the occlusal plane. In this case, for a patient with unilateral facial nerve palsy who was edentulous for a long period of time, a CAD-CAM provisional prosthesis was fabricated using a 3D printing customized gothic arch tracer and a prefabricated occlusal plane recorder, the POP bow system, to achieve a stable interarch relationship. Afterwards, a full mouth implant fixed prosthesis was fabricated by delivering an appropriate vertical dimension of occlusion, a reproducible centric relation, and a correct three-dimensional occlusal plane, and continuous maintenance was performed to restore functional and aesthetic oral health to the patient.

In patients with unstable mandibular movements who are accompanied by involuntary facial muscle movements and asymmetrical changes in the facial features, many difficulties exist in determining the vertical dimension of occlusion, recording centric relation, and transferring information about the occlusal plane. In this case, for a patient with unilateral facial nerve palsy who was edentulous for a long period of time, a CAD-CAM provisional prosthesis was fabricated using a 3D printing customized gothic arch tracer and a prefabricated occlusal plane recorder, the POP bow system, to achieve a stable interarch relationship. Afterwards, a full mouth implant fixed prosthesis was fabricated by delivering an appropriate vertical dimension of occlusion, a reproducible centric relation, and a correct three-dimensional occlusal plane, and continuous maintenance was performed to restore functional and aesthetic oral health to the patient.

BACKGROUND/AIMS: Percutaneous ethanol injection therapy (PEIT) is widely used for the treatment of hepatocellular carcinoma (HCC). However, its long-term therapeutic efficacy is not verified in Korea, one of hepatitis B virus (HBV) endemic areas. Thus, this study was to assess its efficacy and prognostic factors affecting tumor-free survival following PEIT in Korean HCC patients. METHODS: From 1997 to 1999, 100 consecutive patients who had 1 to 3 HCC nodules of maximum diameter less than 3 cm and underwent PEIT were enrolled. Therapeutic efficacy, overall and tumor-free survival rates were assessed during follow-up periods. RESULTS: In 83 patients, HCC nodules were completely ablated by PEIT. The cumulative 1, 2, and 3 year overall survival rates were 98%, 96%, and 88%, respectively. The cumulative 1, 2, and 3 year tumor-free survival rates were 73%, 50%, and 37%, respectively. Larger tumors (> or = were associated with a higher local recurrence rate. CONCLUSIONS: These results demonstrate that PEIT is therapeutically useful in patients with HCC less than 4 in number and less than 3 cm in diameter. However, since multiple or large tumors are associated with low tumor-free survival or high local recurrence rates, PEIT for these tumors and the subsequent post-treatment follow-up should be performed carefully.
Adult ; Aged ; Aged, 80 and over ; Carcinoma, Hepatocellular/mortality/*therapy ; Ethanol/*administration & dosage ; Humans ; Injections, Intralesional ; Korea ; Liver Neoplasms/mortality/*therapy ; Male ; Middle Aged ; Neoplasms, Multiple Primary/mortality/therapy ; Survival Rate

PURPOSE: The purpose of this study was to evaluate the microleakage of various types of resin-bonded fixed partial dentures (RBFPDs) after artificial aging. MATERIALS AND METHODS: Forty models with missing first molar were fabricated using artificial resin teeth and were divided into four groups: Group A, conventional RBFPDs design; Group B, modified RBFPDs design; Group C, assembled 3-piece RBFPDs design; and Group D, assembled 3-piece RBFPDs with different occlusal rest positions. Half of the specimens underwent chewing simulation process (240,000 cycles, 50 N load, 1.7 Hz) and thermocycling (temperatures 5℃~55℃, dwelling time 30 seconds) and the remaining 20 specimens didn't receive any treatment. All the specimens were immersed in 2% methylene blue solution for 24 hours to evaluate microleakage, and were sectioned at the middle part of abutment teeth. To evaluate the microleaskage, a dye penetration was calculated. RESULT: With artificial aging, cyclic loading and thermocycling, a 3-piece RBPFD and a 2-piece RBPFD using original tooth undercuts have significantly lower microleakge (P<0.05) compared to the conventional design of RBPFD and modified RBPFD. CONCLUSION: Within the limit of this experiment, the assembled RBFPDs exhibited a smaller microleakage than the conventional RBFPDs, implying that the assembled RBFPDs can be more effective for reducing the dislodgement of the RBFPDs.
Aging ; Denture, Partial, Fixed* ; Denture, Partial, Fixed, Resin-Bonded ; In Vitro Techniques* ; Mastication ; Methylene Blue ; Molar ; Tooth