The effects of pretreatment of Co-Cr alloy, including two adhesive primers that contain either MDP or MAC-10, and silicoating on the bond. The results obtained as follows : Strength of 4-META/MMA-TBB resin were investigated using FT-IR SEM, and EDAX. in the SEM observation of surface morphologies, the sandblasted specimen exibited a very rough surface, whereas the surfaces of the two groups primed with either MDR or MAC-10 were covered with a layer of primer, and the surface morphology of the silicoated specimen remained almost the same after sandblasting. Before the thermocycling tests, the group treated with MDP demonstrated the highest mean tensile bond strength and the sandblasted group showed the lowest bond strength. After 20,000 themocyling, the mean tensile bond strength of the sandblasted group exhibited a 50% reduction in bond strength, while the other showed a 20~30% reduction. Observation of the metal-resin interface revealed that in all groups the resin permeated the rough surface formed by sandblasting thereby producing a mechnical bond between the metal and the resin, It was also found that thermocycling resulted in a gap formation at the metal-resin interface of the specimens, and the sandblasted group exhibited a larger gap width than the other groups. in fracture mode, all specimens indicated a cohesive fracture within the resin before thermocycling. However, thermocyling produced adhesive failure at the edge of the resin-metal interface in most specimens, The sandblasted group, which exhibited the lowest bond strength after thermocycling, also demonstrated the largest area of adhexive failure.
Adhesives ; Alloys*

Wilson's disease is associated with abnormal deposition of copper in the brain, liver, kidneys and other body tissues, apparently due to an inherited defect in copper metabolism. Clinically the disorder is manifested by signs and symptoms of basal ganglia disease, postnecrotic hepatic cirrhosis, Kayser-Fleischer rings, hypoceruloplasminemia, hypocupremia, hypouricemia, cupruresis, and aminoaciduria. The authors experienced a case of Wilson's disease showing the characteristic signs such as Kayser-Fleischer rings, dysarthria, dysphagia and muscular rigidity, without any signs of liver involvement. A review of this case is provided with the literature.
Basal Ganglia Diseases ; Brain ; Copper ; Deglutition Disorders ; Dysarthria ; Hepatolenticular Degeneration* ; Kidney ; Liver ; Liver Cirrhosis ; Metabolism ; Muscle Rigidity

A successful prosthesis is difficult to produce without using the implants in the severely resorbed alveolar ridges and maxillofacial defects. This report describes clinical experience of the overdenture using O-ring attachment. Clinical results have revealed successful application for the O-ring attachment in the two edentulous patients and a partial maxillectomy patient.
Denture, Overlay ; Humans ; Prostheses and Implants ; Rehabilitation*

There are many complications after the ear surgery to correct chronic otitis media(COM). They include facial nerve paralysis, perichondritis, injury of the dura or the sigmoid sinus, chocolate cyst or mucocele in the healed mastoid cavity, recurrence of cholesteatoma, granulation tissue and otorrhea. However, there has been no report of spontaneous intracerebral hemorrhage during ear surgery to correct COM under general anesthesia. We had encountered one case of spontaneous intracerebral hemorrhage after COM ear surgery under general anesthesia. There was no problem during the operation. We suspected that certain cerebral vascular anomaly triggered the intracerebral hemorrhage while under the general aesthsia. However, the speculation remains verified.
Anesthesia, General* ; Cacao ; Cerebral Hemorrhage* ; Cholesteatoma ; Colon, Sigmoid ; Ear* ; Facial Nerve ; Granulation Tissue ; Mastoid ; Mucocele ; Otitis ; Paralysis ; Recurrence

PURPOSE: The purpose of this study was to investigate the effects of the surface morphology of the implant neck on marginal bone stress measured by using finite element analysis in six implant models. MATERIALS AND METHODS: The submerged type rescue implant system (Dentis co., Daegu, Korea) was selected as an experimental model. The implants were divided into six groups whose implant necks were differently designed in terms of height (h, 0.4 and 1.0 mm) and width (platform width, w = 3.34 + 2b [b, 0.2, 0.3 and 0.4 mm]). Finite element models of implant/bone complex were created using an axisymmetric scheme. A load of 100 N was applied to the central node on the top of crown in parallel with the implant axis. The maximum compression stress was calculated and compared. RESULTS: Stress concentration commonly observed around dental implants did not occur in the marginal bone around all six test implant models. Marginal bone stress varied according to the implant neck bevel which had different width and height. The stress was affected more markedly by the difference in height than in width. CONCLUSION: This result indicates that the implant neck bevel may play an important role in improving stress distribution in the marginal bone area.
Axis, Cervical Vertebra ; Crowns ; Dental Implants ; Finite Element Analysis ; Models, Theoretical ; Neck

Background: To report the long-term clinical and radiologic results of impaction bone grafting and standard cemented polished stem for femoral revision arthroplasty in patients with extensive bone deficiency. Methods: We retrospectively reviewed 47 hips that underwent femoral revision hip arthroplasty using an impaction-morselized allograft with a standard cemented polished stem. The average age at the time of revision hip arthroplasty was 55 years (range, 39–75 years). The modified Harris hip score (HHS) was used for clinical evaluation. The radiologic evaluation focused on stem subsidence, stem position, progressive radiolucent lines, bone remodeling, and the incorporation of allografts. Results: The modified HHS improved from an average of 55.04 (range, 25–79.5) preoperatively to 90.1 (range, 81–93.2) at the last follow-up. The mean follow-up duration was 13.5 years (10.9–17.8 years). The radiographic analysis revealed stable stems.Femoral stems showed an average subsidence of 3.2 mm (range, 2–8 mm) in the cement mantle. However, there was no mechanical failure or subsidence of the cement mantle in the femurs. The stem position was neutral or varus less than 5°. No progressive radiolucent line or osteolysis was observed. Evidence of cortical and trabecular remodeling was observed in all cases. There were four cases of intraoperative cracks and four cases of distal femur splitting. Conclusions Initial stem stability using impaction bone grafting and a standard cemented polished stem in femoral revision arthroplasty resulted in good outcome. Delicate impaction grafting techniques and intraoperative crack and splitting fixation are the points that need attention for successful long-term results.

No abstract available.
Gonadotropin-Releasing Hormone* ; Gonads* ; Steroids* ; Trophoblasts*

No abstract available.
Cell Line, Tumor* ; Gonadal Steroid Hormones* ; Gonadotropin-Releasing Hormone* ; Gonads*

Congenital cutis laxa is a rare inherited disorder of connective tissue manifested by loose and hanging skin, resulting in a prematurely-aged appearance. Cutis laxa may be inherited in an autosomal dominant, autosomal recessive and X-linked recessive pattern or an acquired form. In this report we describe a patient with congenital cutis laxa and growth retardation. The skin showed loose folds, wrinkling, and sagging of the face, abdomen, and both thighs. His weight and height were below the 3rd percentile. He had no family history for this skin disease.
Abdomen ; Connective Tissue ; Cutis Laxa* ; Elastic Tissue ; Humans ; Skin ; Skin Diseases ; Thigh

Congenital cutis laxa is a rare inherited disorder of connective tissue manifested by loose and hanging skin, resulting in a prematurely-aged appearance. Cutis laxa may be inherited in an autosomal dominant, autosomal recessive and X-linked recessive pattern or an acquired form. In this report we describe a patient with congenital cutis laxa and growth retardation. The skin showed loose folds, wrinkling, and sagging of the face, abdomen, and both thighs. His weight and height were below the 3rd percentile. He had no family history for this skin disease.
Abdomen ; Connective Tissue ; Cutis Laxa* ; Elastic Tissue ; Humans ; Skin ; Skin Diseases ; Thigh