The purpose of this study is to observe histopathologic changes in the bilateral craniomandibular joints after allowing 6 weeks of consolidation by varying the amount of distraction in rabbit mandible. Eight rabbits weighing about 2 to 3kg were used. After corticotomy was performed on the left mandibular body between the first premolar and the second premolar region, a unilateral fixation device was placed. Then, a 7-day period was allowed without distraction of the device. The mandible was lengthened 0.5mm/day. Corticotomy and lengthening of mandible were not performed in control group. After the completion of the lengthening process, a 6-week-consolidation period was allowed. Then, the rabbits were sacrificed, and histologic examination of the craniomandibular joints was performed. Proliferative changes were observed in the craniomandibular joints in all groups. With the increasing amount of distraction, hypertrophy of the cartilage layer became more severe, bone formed was dense and enchondral ossification was clearly shown in subchondral bone. Hypertrophy of the cartilage layer was also seen in the non-distracted side as the distracted side in the experimental group. These results indicate that when physical force is applied constantly to joints, the proliferation of articular cartilage and bone formation are present. When more than 6 weeks of consolidation period is allowed at the time of performing distraction for more than 5mm, articular changes, especially, in the contralateral side should also be noted.
Bicuspid ; Cartilage ; Cartilage, Articular ; Hypertrophy ; Joints* ; Mandible ; Osteogenesis ; Osteogenesis, Distraction* ; Rabbits*

No abstract available.

No abstract available.
Hernia* ; Pneumoperitoneum*

AO bilirubinometer is a direct reading spectrophotometer specifically designed to measure total bilirubin using sera from newborn infantsl A study was performed to compare the bilirubin values obtained using the AO bilirubibometer and modified Diazo method(Rappaport method). The results were as follows : 1. The average percentage of recovery of AO bilirubinometer was 98.7%, while modified Diazo method was represented as 95.3%. 2. In comparison of two bilirubin techniques, the regression is linear, expressed by Y=1.16X-2.42, where values obtained as the bilirubinometer was on X axis and those from the modified Diazo mt\ethod on Y axis. The correlation coefficient was 0.95. 3. The variability of bilirubin values by cuvette was negligible, average percentage of variation coefficient being 0.1%. 4. The variability of bilirubin values by examiner was also negligible, the evarage percentage of bilirubin variation coefficient being 0.67%.
Axis, Cervical Vertebra ; Bilirubin ; Humans ; Hyperbilirubinemia, Neonatal* ; Infant, Newborn

TMJ internal derangement has been treated by the conservative methods and the surgical methods according to the clinical state. There are several surgical methods for treatment of TMJ internal derangement, such as disk repositioning and repair, diskectomy with and without grafts, articular surface contouring, high condylectomy, condylotomy, and arthroscopic surgery etc. Especially, it has been reported that the condylotomy produced the increase of the joint space, the pain relief, the elimination of the joint dysfunction due to the antero-inferiorly movement of the condyle, and the condylar morphologic change resulted from the progressive remodeling in TMJ without the surgical intervention within the TMJ. We have performed EVRO(extraoral vertical ramus osteotomy) to the 5 patients diagnosed as ADDWR(Anterior disk displacement with reduction) from June 1997 to December 1997 in the Chin-Hae military hospital. We diagnosed them with MRI and clinical examination. And we compared the preoperative symptoms with postoperative 2 months symptoms. They were compared by Helkimo index, mandibular mobility index, and pain scale. Anamnestic Index(Ai) was changed from 2.0 preoperatively to 1.2 postoperatively, clinical dysfunction score from 11.8 to 2.8, and Clinical Dysfunction Index(Di) from 2.8 to 1.2. The pain scale of the affected side was changed from 4.4 to 2.6 and that of the non-affeted side from 2.2 to 2.6. The maximal mouth opening was changed from 35.2mm to 40.9mm, right lateral excursion from 7.8mm to 8.0mm, left from 8.8mm to 7.0mm, and protrusion from 6.2mm to 6.2mm. In these results, we could not expect any excellent improvement of the clinical symptoms during the immediate postoperative periods. But we could observe the disappearance of the joint noise and the improvement of the clinical dysfunction score. On the basis of the results of the previous investigations about condylotomy effect which presented the condyle position were changed antero-inferiorly in the articular fossa during the immediate postoperative period, the displaced condyles may prevent wide mouth opening. Therefore it is elucidated that the improvement of the maximal mouth opening and other functions were restricted during the immediate postoperative periods. After long term follow-up period, the symptomatic and functional improvement will be expected by the passive repositioning of the proximal segment. We report the preliminary results with the related references.
Arthroscopy ; Diskectomy ; Follow-Up Studies ; Hospitals, Military ; Humans ; Joints ; Magnetic Resonance Imaging ; Mouth ; Noise ; Postoperative Period ; Temporomandibular Joint* ; Transplants

The purpose of this study was to compare the effect of curing methods of adhesive resins and resin cements in the root canal. Crown portions of 32 single-rooted mandibular premolars were removed. Routine endodontic treatment was done, and 9 mm deep post spaces were prepared within root canals. No. 3 FRC Postec posts (Ivoclar-Vivadent AG, Liechtenstein) were cemented in the post spaces by self-(SC) or light-curing (LC) using two dual-cured adhesives (Adper Scotchbond multi-purpose plus and Exite DSC )and resin cements (RelyX ARC and Variolink II). They were assigned to 4 groups (n=8); R-SC, R-LC, V-SC, V-LC group. After stored in distilled water for 24 hours, each root was transversally sectioned with 1.5 mm thick and made three slices. The specimens were subjected to push-out test in a universal testing machine (EZ Test, Shimadzu Co., Japan) with a crosshead speed of 1 mm/min. The data were analyzed with repeated ANOVA and one-way. ANOVA. Also the interface of post-resin cement and resin cement-canal wall of each group was observed under FE-SEM. When fiber posts were cemented into the root canal using total-etch adhesives, the bond strength and adaptation between post and root canal dentin was affected by curing method. Self-cure of adhesives and resin cements showed higher bond strength and closer adaptation than light-cure of them.
Adhesives ; Bicuspid ; Collodion ; Crowns ; Dental Pulp Cavity ; Dentin ; Resin Cements ; Water

Squamous cell carcinoma is relatively rare in the eyelid, accounting for about 9.2% of all eyelid malignancy. Squamous cell carcinoma occurs most commonly in fair-skinned, elderly individuals who have had a history of chronic sun exposure and skin damage. This potentially lethal neoplasm is capable of metastasis to regional lymph nodes. Squamous cell carcinoma may arise de novo or from pre-existing lesions and also develop following radiation therapy. Various treatment modalities have been advocated including surgical extirpation with histologic control, radiation therapy and cryotherapy. We report this case of regional metastatic squamous cell carcinoma that developed from recurrent chalazion in 37 years old woman with a brief review of literetures.
Adult ; Aged ; Carcinoma, Squamous Cell* ; Chalazion* ; Cryotherapy ; Eyelids ; Female ; Humans ; Lymph Nodes ; Neoplasm Metastasis ; Skin ; Solar System

Squamous cell carcinoma is relatively rare in the eyelid, accounting for about 9.2% of all eyelid malignancy. Squamous cell carcinoma occurs most commonly in fair-skinned, elderly individuals who have had a history of chronic sun exposure and skin damage. This potentially lethal neoplasm is capable of metastasis to regional lymph nodes. Squamous cell carcinoma may arise de novo or from pre-existing lesions and also develop following radiation therapy. Various treatment modalities have been advocated including surgical extirpation with histologic control, radiation therapy and cryotherapy. We report this case of regional metastatic squamous cell carcinoma that developed from recurrent chalazion in 37 years old woman with a brief review of literetures.
Adult ; Aged ; Carcinoma, Squamous Cell* ; Chalazion* ; Cryotherapy ; Eyelids ; Female ; Humans ; Lymph Nodes ; Neoplasm Metastasis ; Skin ; Solar System

Anophthalmos is a complete absence of the tissues of the eye. Embryologically, anophthalmos denotes those cases wherein there is complete failure in the outgrowth of the primary optic vesicle. When essential structures of the eye are present, the aonormality is microphthalmos, no matter how small the eye may be. Clinical anophthalmos represents the majority of cases in which the eye appears to be absent. Congenital anophthalmos is one of the rare ophthalmic anomalies, only 5 cases were reported in Korea and about 100 cases in the world. We report this case with a brief review of literatures.
Anophthalmos* ; Korea ; Microphthalmos

The reports of all amniocentesis samples received in our cytogenetic laboratory from 1986 to 1998 were reviewed to identify cases in which culture failure of amniocytes occurred. Medical records were then reviewed for the prenatal ultrasonographic findings, karyotype when available, and clinical outcome. We investigated the clinical aspects associated with second trimester amniotic fluid cell culture failure. During the study period, 5,325 second trimester amniotic fluid samples were processed, of which 42(0.8%) failed to yield a result. Ninety-seven percent of the samples were obtained before 24 weeks' gestation, mainly because of advanced maternal age. Three percent of the samples were obtained after 24 weeks' gestation. Culture failure was more common in samples obtained after or at 24 weeks' gestation(11.8%) than in those obtained before 24 weeks(0.44%)(p<0.05, chi-square test). This difference was also observed when the results were analysed according to the cases with known normal or abnormal karyotypes, The frequency of culture failure did not differ significantly between the groups with normal and abnormal karyotypes. We conduded that amniotic fluid cell culture failure is more common in advanced pregnancy and is not associated with a higher incidence of chromosomal abnormalities.
Abnormal Karyotype ; Amniocentesis ; Amniotic Fluid ; Cell Culture Techniques* ; Chromosome Aberrations ; Cytogenetics ; Female ; Humans ; Incidence ; Karyotype ; Maternal Age ; Medical Records ; Pregnancy ; Pregnancy Trimester, Second