No abstract available.
Haloperidol* ; Humans*

Schwannomas are neurogenic tumors that arise from Schwann cells of the neural sheath. They are most often benign and solitary. Ancient schwannoma is a rare variant of schwannoma with a typical characteristics of a slow growing benign tumor. A case of ancient schwannoma which originated from the lingual nerve has not been reported in the literature yet. The clinical and histological aspects of this tumor are discussed and the literature regarding this rare entity is reviewed.
Lingual Nerve* ; Neurilemmoma* ; Schwann Cells

No abstract available.

PURPOSE: The purpose of this study was to compare the qualities of the four different processing chemicals(solutions). MATERIALS AND METHODS: With EP 21 films(Ektaspeed plus film, Kodak Co., USA), nine unexposed and nine exposed films of a step wedge were processed utilizing automatic film processor(XR 24, Durr Co., Germany) for 5 days. During 5 days, the total number of processed films including out-patient's intraoral films were about 400-500 for each brand. Base plus fog density, film density, contrast of processed films were measured with densitometer(model 07-443 digital densitometer, Victoreen Co., USA). These measurements were analyzed for comparison. RESULTS: The results were as follows, 1. For the base plus fog density, there was significant difference among the four chemicals (p<0.05). The sequence of the base plus fog densities was in ascending order by Kodak, X-dol 90, Agfa and Konica. 2. For the film density, all chemicals showed useful range of photographic densities(0.25-2.5). The sequence of the film densities was in ascending order by Kodak, X-dol 90, Konica and Agfa. But there was no statistically significant difference of film density between X-dol and Kodak (p<0.05). 3. The sequence of the contrasts was in ascending order by Konica, X-dol 90, Kodak and Agfa. But there was no statistically significant difference of contrast between X-dol and Konica (p<0.05). CONCLUSION: These results indicated that the four processing chemicals had the clinically useful film density and contrast, but only Kodak processing chemical had useful base plus fog density.
Dentistry* ; Weather

PURPOSE: To measure the differences of the splint pin angulation and the position of the planned implant site after conventional tomographic analysis. MATERIALS AND METHODS: The angulation and the location of the metal splint pin retained in acrylic stent were compared with the corrected angulation and the location of the implant fixture on the 331 tomographic images. RESULTS: The stent pins were located buccal in 40%, lingual in 10% to the corrected implant site after analysis of the conventional tomographic image. The angle and the location of the maxillary splint pin were mainly directed buccal on incisor and canine regions. The angle and the location of the splint pins in premolar and molar regions needed less corrections in both maxilla and mandible. CONCLUSIONS: This study demonstrated that the use of tomographs was essential for successful dental implant planning.
Bicuspid ; Dental Implants ; Incisor ; Mandible ; Maxilla ; Molar ; Splints ; Stents ; Tomography, X-Ray

This study is designed to determine the artificial incipient proximal caries lesion detectability by dentists on Ektaspeed Plus film using ROC analysis. Sixteen premolars and 30 molars, which have 52 proximal caries-like demineralized lesions using acid-gel technique were added to 20 sound premolars and 30 sound molars to make 24 plaster bolcks. Each block with 4 teeth and 6 contacting proximal surfaces was placed in an optical bench to take 12 bitewing radiographs with Ektaspeed Plus film. Thirty-six dentists acted as observers to evaluated the proximal lesions using five rating scales for ROC analysis. They were also asked to determine the presence or absence of the proximal caries. The true status of the proximal caries was established by the consensus of three oral and maxillofacila radiologists. For evaluation of intra-observer agreement, 9 dentist reread the radiographs at an interval of 1 month. The Pearson correlation coefficient for the intra-observer agreement was 0.746(good agreement). Ten observer's data set were degenerated. The mean area under ROC curve from 26 obsevers was 0.806 and standard deviation was 0.061. The sensitivity and the specificity of the binary response were 0.17(SD=0.11) and 0.78(SD=0.17) respectively. The binary response only reveal a single values of sensitivity and the specificity. The ROC analysis to assess the diagnostic accuracy in caries detection, which producing estimates of sensitivities for all specifities, yield more comprehensive measures of diagnostic performance than single values for sensitivity and specificity.
Bicuspid ; Consensus ; Dataset ; Dentists ; Humans ; Molar ; ROC Curve* ; Sensitivity and Specificity ; Tooth ; Weights and Measures

PURPOSE: To determine whether subtraction images utilizing contrast media can improve the diagnostic performance of proximal caries diagnosis compared to conventional periapical radiographic images. MATERIALS AND METHODS: Thirty-six teeth with 57 proximal surfaces were radiographied using a size #2 RVG-ui sensor (Trophy Radiology, Marne-la-Vallee, France). The teeth immersed in water-soluble contrast media and subtraction images were taken. Each tooth was then sectioned for histologic examination. The digital radiographic images and subtraction images were examined and interpreted by three dentists for proximal caries. The results of the proximal caries diagnosis were then verified with the results of the histologic examination. RESULTS: The proximal caries sensitivity using digital subtraction radiography was significantly higher than simply examining a single digital radiograph. The sensitivity of the proximal dentinal carious lesion when analyzed with the subtraction radiograph and the radiograph together was higher than with the subtraction radiograph or the radiograph alone. CONCLUSION: The use of subtraction radiography with contrast media may be useful for detecting proximal dentinal carious lesions.
Contrast Media ; Dental Caries ; Dentin ; Dentists ; Diagnosis* ; Humans ; Radiography* ; Subtraction Technique ; Tooth

PURPOSE: To determine whether subtraction images utilizing contrast media can improve the diagnostic performance of proximal caries diagnosis compared to conventional periapical radiographic images. MATERIALS AND METHODS: Thirty-six teeth with 57 proximal surfaces were radiographied using a size #2 RVG-ui sensor (Trophy Radiology, Marne-la-Vallee, France). The teeth immersed in water-soluble contrast media and subtraction images were taken. Each tooth was then sectioned for histologic examination. The digital radiographic images and subtraction images were examined and interpreted by three dentists for proximal caries. The results of the proximal caries diagnosis were then verified with the results of the histologic examination. RESULTS: The proximal caries sensitivity using digital subtraction radiography was significantly higher than simply examining a single digital radiograph. The sensitivity of the proximal dentinal carious lesion when analyzed with the subtraction radiograph and the radiograph together was higher than with the subtraction radiograph or the radiograph alone. CONCLUSION: The use of subtraction radiography with contrast media may be useful for detecting proximal dentinal carious lesions.
Contrast Media ; Dental Caries ; Dentin ; Dentists ; Diagnosis* ; Humans ; Radiography* ; Subtraction Technique ; Tooth

PURPOSE: To compare the diagnostic performance of clinical and radiologic examination for the interproximal caries on intraoral periapical radiographs and to evaluate the value of periapical radiographs. METHODS: One hundred seven dental patients were examined clinically, with a mouth mirror and an explorer, by a dentist at the department of oral medicine, and the presence or absence of interproximal caries lesion was recorded. The patients were prescribed one or more dental periapical radiographs. Radiographs were assessed for the presence of interproximal caries by three radiologists independantly. Two thousand sixty interproximal surfaces were included in this study. The diagnostic accuracies of clinical and radiologic examinations for interproximal caries were calculated. To assess the degree of agreement between clinical and radiologic examinations, Cohen's coefficient of agreement was computed. RESULTS: The specificity of clinical and radiologic examination was 0.991, 0.997 and the sensitivity was 0.279, 0.985 respectively. The diagnostic accuracy of radiologic examination was statistically significantly higher than that of clinical examination(P<0.05). Cohen's kappa value of clinical and radiologic examination was 0.335, 0.942 respectively. These results suggested that clinical examination show only fair agreement, whereas radiologic examination show perfect agreement. CONCLUSION: The diagnositic performance of the dental periapical radiographs on interproximal caries were higher than that of clinical examination, thus this study showed the validity of periapical radiographs for detecting interproximal caries lesion without bitewing radiograph.
Dentists ; Diagnosis* ; Humans ; Mouth ; Oral Medicine ; Radiography ; Sensitivity and Specificity

A cystic compound odontoma in the maxillary sinus occured in a 13-years-old boy, who had missing right upper third molar without having the hostory of extraction of the wisdom tooth. He complained nasal stuffimess, headache, and pain on the affected face, resembling any sign and symptoms of the maxillary sinus problems. The cysitc compound, sized 2 x 1.5 cm in diameter was pedunculated and attached on the posterior wall of the right maxillary sinus and above the antral floor. The location of the compound odontoma in the maxillary sinus was confirmed after panoramic, waters, spiral tomographic, CT examinations and surgical exploration. Irs location was on the medical, posterior, superior to the normal position of the maxillary third molar or the maxiilary dental arch. The cystic odontoma in the maxillary sinus made the patient have the sings and symptoms of mazillary sinustis. The cystic compound dodntoma might be originated from the dental lamina of the missing upper right thred molar. The "V principle" of the upper jaw growth and the pneumatization process fo the maxillary sinus could explain why the compound odontoma had peduncular shape and the location of odontoma was on the demial, superior to the normal position of the maxillary dental arch.
Dental Arch ; Headache ; Humans ; Jaw ; Male ; Maxillary Sinus* ; Maxillary Sinusitis ; Molar ; Molar, Third ; Odontoma* ; Water