Taehan Ch'ikkwa Uisa Hyophoe chi最新文献

This report presents the findings of an edentulous case treated with Brånemark osseointegrated prosthesis and elapsed 1 year. The fixture installation was recognized as a sort of artificial abutment preparation as compared to natural abutment preparation and the procedure performed, prosthetic design and fabrication, and details after the prosthesis placement were discussed. Especially, fixture installation procedure, gingival health, perifixtural bone state, prosthesis stability, occlusal condition, masticatory function and efficiency were analysed subjectively and objectively in the light of the references. In conclusion, since this case is presumably still remaining in the remodelling phase as well as the inadequacy of the period for a good evaluation, not any significant observations were made except the general to the previous documentations.

The purpose of this experiment was to establish a simple and general recommendation criteria to evaluate the toothbrush whether it was usable or not. We gave 94 adults the same toothbrushes and required them to use only those toothbrushes and recollected them after 4 weeks' use. Then, we determined elasticity loss, deformation degree and deviation angle of the used toothbrushes. From the above data, we compared and analyzed the correlation between loss of elasticity loss and deviation angle. The obtained results were as follows: 1. In Korean adults, there was no statistical difference between elasticity loss and deviation angle according to both age and sex group (p greater than 0.05). 2. There was no statistical correlationship between elasticity loss and deviation angle (r = 0.15, p greater than 0.05). 3. It was regarded that the determination of deviation angle was more simple method than that of elasticity loss for the evaluation of useful period of toothbrush. 4. In Korean adults, the average usable period of toothbrush was estimated about 1 month.

The purpose of this study was to compare the tensile bond strength of the resin-metal interface between etched only and etched & goldplated metal specimens. Etched only and etched & goldplated metal specimens were treated or were not treated with bonding agent and bonded to metal specimens with Comspan and MBAS. Also, electrochemically only etched metal surface and etched & goldplated metal surface was observed by SEM. The following results were obtained: 1. The tensile bond strength of the electrochemically etched only and gold-plated specimens were not significantly different in Comspan group, but the gold-plated specimens in MBAS group demonstrated slightly lower values than the etched only specimens. 2. The tensile bond strengths were not significantly different between the treated group with bonding agent and not-treated group with bonding agent. 3. The tensile bond strengths were not significantly different between the Comspan and MBAS groups. 4. The basic microretentive structures, maintained obviously in the etched and goldplated metal surfaces by SEM.

There is no know scientifically accurate method of determining the correct vertical dimension. By the vertical dimension we mean the distance between the subnasale & the bottom of chin when patients were radiograped in the physiologic rest positions with & without prostheses. The author measured seven selected points in a midsagittal profile plane of 50 patients (26 complete upper & lower denture, 24 complete upper & removable lower partial denture) by the cephalometric methods. The following conclusions were obtained from this study. 1. Vertical dimension was measured 70.03 mm during removal of upper & lower dentures in mouth, 70.18 mm during insertion of upper denture only, 70.83 mm during insertion of lower denture only & 70.88 mm during insertion of upper & lower dentures, therefore mandibular denture alone in mouth has a slightly significant effects. 2. Vertical dimension between male & female from partially/fully edentulous patients was proved 72.15 mm in male & 68.81 mm in female. 3. Anterior-posterior displacement is largely associated with upper lip movement & superior-inferior displacement is generally associated with a function of lower lip & mandibular structure movements. 4. The magnitude of horizontal displacement for all points ranged from 0 to 8.4 mm & vertical displacement for all points ranged from 0 to 12 mm displacement. The maximum horizontal displacement in point II & maximum vertical displacement in point III was measured. 5. Increase in height may be associated with contraction of dental arches; or conversely, reduction of vertical height may be associated with expansion of the dental arches due to muscle tonicity & lip contours.

The authors observed a 20-year-old female patient who had come to Department of Dentistry, Kyungpook National University Hospital due to the chief complaints of gingival enlargement and pain on the upper jaw. We performed the clinical, hematologic and radiologic examinations for the patient and obtained the following results; 1. We observed a nevus flammeus on the right side of the facial area, soft palate and buccal mucosa. 2. The enlargement of the upper and lower gingiva, we thought, was due to inflammatory reaction. 3. The above clinical signs were found in accordance with the maxillary and ophthalmic branch of trigeminal nerve. 4. The maxillary sinus was enlarged in Water's view. 5. Finally, we have reached the diagnosis of Sturge-Weber syndrome for the patient.

The purpose of the present article is to describe a case in which malocclusion patient accompanied with temporomandibular disorders was treated with the fixed appliance and Gnathological Tooth Positioner. Patient, a girl aged 16 years 9 months, had a skeletal Class III malocclusion with mandibular protrusion and anterior edge to edge bite. Centric Relation Splint was made to alleviate the acute symptoms and Gnathological Tooth positioner at the finishing stage of fixed appliance was applied to achieve the functional occlusion. After 12 months of active treatment, the patient gained a normal overbite-overjet relationship. Observation after 2 years out of retention revealed a stable occlusion.

Anterior openbites cause impaired masticatory, malfunction of tongue, speech defects, disuse atrophy of teeth and periodontal tissue, esthetic problem. It is corrected by some available orthodontic methods according to its etiologic factors and growth stage. Removable appliances with tongue crib, spring loaded occlusal bite block, M.E.A.W. with rubber elastics, vertical chin cap and high pull head gear are selected for its correction. Extraction is considered for preventing wedging effect and Adenoidectomy is performed as adenoid cause mouth breathing. In the case of treatment of anterior openbites, combined therapy acquire better results than single treatment method. Removal of etiologic factors and accurate diagnosis is the best way of prevention of its recurrence.

We present the anatomy, methodology, procedure for arthroscopy on temporomandibular joint. Arthroscopic view of normal and pathologic view on superior articular cavity of temporomandibular joint are presented. There were no serious complications except slight swelling on temporomandibular joint.

The purpose of this study was to investigate and to classify the patients of mandibular bone fracture who were hospitalized in the Kang-nam General Hospital. We observed clinically 57 patients from July 1983 to August 1988. The results obtained were as follows: 1. The ratio of male to female was about 6.1:1. 2. The highest age incidence was 3rd decade age group. 3. The most frequent etiologic factor was falling-down (36.8%). The next factors were fist-blow (31.6%), traffic accident (15.8%), sports (5.3%) and works (5.3%) in order. 4. The most frequent site of mandibular fractures was symphyseal area (23.1%), and mandibular angle (20.5%), condyle (19.2%), body (19.2%), alveolar bone (9.0%) and ramus (7.7%) were next in order.

The purpose of this study was to test the bond strength of a Co-Cr alloy. 40 cylindrical specimens (4 mm in diameter) were made of non-surgical Vitallium, and tensile bond strength was measured after etching and bonding. Etching was done with Oxy-Etch, and etching conditions were as follows: Composition of etching solution: Cone. nitric acid; 1 part glacial acetic acid; 1 part distilled water; 2 parts Current: 300 ma/cm2 Etching time: 3 min. The results were as follows: 1. Tensile bond strength was 435 +/- 116 kg/cm2 2. The result of this study shows that this etching method could be clinically applicable.