PURPOSE : The purpose of this study was to determine proper position and angulation of an implant for immediate implantation. MATERIALS AND METHOD : From the years 1997 to 2000, 52 Denta scanR views, 22 upper and 32 lower jaw with an average age of 43 and 40 respectively, were investigated, which comprise intact upper and lower 6 anterior teeth and premolars. on the Denta scanR, the optimal placement for the immediated implantation was simulated. The measuring methods included. 1) Angulation difference between tooth long axis and alveolar bone process. 2) Angulation difference of long axis between tooth and installing fixture 3) Distance between center of tooth at cervical area and center of fixture. 4) Distance from root apex to the bone limit of vital structure. One sample t-test was used for statistical analysis. RESULT : The results were as follows. 1) At the maxillary central incisor and lateral incisor, angulation difference of long axis between tooth and installing fixture was respectively 0.5 and 3.2degrees with the fixture center's palatally positioned 2mm apart from tooth center. 2) At the lower anterior 6 teeth, that was about -2.8degree to -4.6degree with the fixture center's lingually positioned 1mm apart from tooth center. 3) At the maxillary canine and premolar, that was respectively 11.8degree and 7.2degree with the fixture center palatally positioned 2~2.4mm apart from tooth center. 4) At the lower premolar area, that was about 0degree to 2degree with the fixture center's lingually positioned 0.5~1mm apart from tooth center. 5) Distance from root apex to the bone limit of vital structure, at the maxillary anterior and premolars, was the range of 10 to 12mm, and at the mandibular anterior teeth and the 1st premolar, that was the range of 18 to 20mm. CONCLUSION : The proper implant position of maxillary anterior and premolar teeth is as paralleled as or more buccally angulated than long axis of tooth with the fixture center's palatally positioned. in mandibular anterior region, long axis of implants is lingully angulated compared with compared with long axis of tooth and in premolar, almost parelleled with long axis of tooth and alveolar process.
Alveolar Process ; Axis, Cervical Vertebra ; Bicuspid ; Dental Implantation* ; Dental Implants* ; Incisor ; Jaw ; Statistics as Topic* ; Tooth

PURPOSE : The Purpose of this study was to investigate the anti-inflammatory effect on combination dosage of dexamethasone and naproxen after removal of impacted 3rd molars. We evaluated postoperative pain, swelling, and mouth opening limitation quantitatively. PATIENTS AND METHODS : Removal of an impacted lower third molar was done under local anesthesia with 2% lidocaine to 239 healthy patients. We randomly gave experimental group 1.5mg dexamethasone and 200mg naproxen three times a day for postoperative 2days, and also gave control group 200mg naproxen alone three times a day for postoperative 2days. Swelling and pain were measured by visual analogue scale (VAS). Mouth opening limitation was measured by maximum interincisal opening length. We estimated these measurements in the first and second postoperative days. Differences between experimental and control group were investigated considering age, sex, BMI(body mass index), impacted type, surgical site(right or left), and operation time by independent student T-test. RESULTS : In general, swelling, pain, and mouth opening limitations were significantly reduced (p<0.01) by combination dose of dexamethasone and naproxen in postoperative one day. But there was no difference in pain on the second postoperative day. As variables being considered, in the postoperative pain, there was significant difference between experimental group and control group in only male, little bony removal group, left side extraction group. In case of postoperative swelling, there was no significant differences in male, adolescence, long operating time group (over 20 minutes), medium BMI group and right side extraction group. In case of postoperative mouth opening limitation, there was significant difference between only female and long operating time group (over 20 minutes). CONCLUSION : Variables being considered, postoperative swelling was more reduced by the combination dose of naproxen and dexamethasone than that of naproxen alone after removal of impacted 3rd molars. But there was varoius results in pain and mouth opening limitation.
Adolescent ; Anesthesia, Local ; Dexamethasone* ; Female ; Humans ; Lidocaine ; Male ; Molar ; Molar, Third* ; Mouth ; Naproxen* ; Pain, Postoperative

A retrospective study was made in 21 patients who angiographically diagnosed as moyamoya or moyamoya-like disease over the last 10 years. Computed tomography of the patients showed semorrhage, infarction or normal. Carotid angiography revealed various stages unilaterally or bilaterally. Seventy-five percent of the venous phase on the side of arterial occlusion demonstranted some abnormalities. Two children with unilateral abnormality showed arterial occlusion at supraclinoid portion of internal carotid arteries. On the other hand 5 adults with unilateral abnormality showed occlusion at variable sites of internal carotid artery.
Adult ; Angiography ; Carotid Artery, Internal ; Child ; Hand ; Humans ; Infarction ; Moyamoya Disease* ; Retrospective Studies

The patient with complaints of seizure, headache and upward gaze paralysis underwent V-P shunt under the impression of pinealoma. The diagnosis of cerebral paragonimiasis was eventually made by the aid of brain CT scan and PW skin test. The case showed a positive intradermal test with relevant histories of eating rare crayfishes and the characteristic CT findings. Plain skull X-ray showed the round calcifications around the pineal region. Brain CT demonstrated multiple round calcifications in the left fronto-occipital region and dilation of the left lateral ventricle with cortical atrophy.
Astacoidea ; Atrophy ; Brain ; Diagnosis ; Eating ; Headache ; Humans ; Intradermal Tests ; Lateral Ventricles ; Ocular Motility Disorders* ; Paragonimiasis* ; Paralysis ; Pinealoma ; Seizures ; Skin Tests ; Skull ; Tomography, X-Ray Computed

The discovery of C-T scan have facilitated the detection of post-traumatic hydrocephalus cases. Of those, 6 cases of hydrocephalus of non-parenchymatous in origin, in other words, normal pressure hydrocephalus were presented. They were diagnosed by repeated brain C-T and cisternography with Iodine 131-labeled human serum albumin. The symptomatology, diagnosis procedure and surgical results were discussed. Followings are the results. 1) The RIHSA cisternogram taken after 6 hrs, 12 hrs, 24 hrs and 48 hrs from lumbar injection showed abnormal features in all cases. 2) Surgical results were thought that there is much correlation with the age and improvement of mental impairments were seen, more or less, in all cases and improvement of gait disturbance and incontinence were seen in 5 cases and 4 cases respectively. 3) In those who sustained severe head injury with delayed recovery, the authors think, repeated check of brain C-T and cisternography is necessitated to perform the V-P shunt or V-A shunt to relieve the symptomatology of normal pressure hydrocephalus.
Brain ; Cerebrospinal Fluid Pressure ; Craniocerebral Trauma ; Diagnosis ; Gait ; Humans ; Hydrocephalus ; Hydrocephalus, Normal Pressure* ; Iodine ; Serum Albumin ; Ventriculoperitoneal Shunt

We present a case of extensive thrombosis in the jugular vein and sigmoid, transverse, superior sagittal sinuses with partial deep venous thrombosis. The patient had acute severe headache but had neither focal neurological deficit nor consciousness change. Emergency endovascular thrombolysis through transfemoral approach was performed with successful restoration of venous drainage. There was no hemorrhagic complication. Several days later, the patient had a focal seizure attack due to focal venous infarction despite of continuous systemic anticoagulation therapy.
Colon, Sigmoid ; Consciousness ; Drainage ; Emergencies ; Headache ; Humans ; Infarction ; Jugular Veins ; Seizures ; Sinus Thrombosis, Intracranial* ; Superior Sagittal Sinus ; Thrombosis ; Urokinase-Type Plasminogen Activator ; Venous Thrombosis

Primary malignant lymphoma of the central nervous system which is characterized by high radiosensitiveness is rarely reported in the literature. We have experienced a case of recurred cerebellar lymphoma whose criginal site was septal area. Though septal tumor disappeared completely after radiation, a large cerebellar tumor was found 2 years thereafter. After decompressive suboccipital craniectomy and partial tumor removal the patient's general condition improved so secondary radiation and chemotherapy were started. In the course of port-op therapy, the patient abruptly deteriorated and succumbed.
Central Nervous System ; Cerebellar Neoplasms ; Cerebellum* ; Drug Therapy ; Humans ; Lymphoma* ; Septum of Brain

Paraganglioma, a pheochromocytoma arising in extra-adrenal tissue, is less common and more difficult to characterize radiologically. This disease has higher incidence of nonfunctioning and malignancy than adrenal pheochromocytoma, and occurs multiple. mostly around renal hilum. A 35-year-old female was transferred to our hospital complaining of palpable mass on the LUQ for 3 years. On admission, child head-sized fixed hard mass was palpated on LUQ. Urinary VMA, serum catecholamine and other tumor markers were within normal limit. Ultrasonogram and abdominal CT demonstrated inhomogeneous enhanced tumor mass located anteriorly to left kidney. En bloc removal of the mass with ipsilateral kidney and regional lymphadenectomy were done. We confirmed postoperatively the benign nonfunctioning retroperitoneal paraganglioma by histopathological studies.
Adult ; Child ; Female ; Humans ; Incidence ; Kidney ; Lymph Node Excision ; Paraganglioma* ; Pheochromocytoma ; Tomography, X-Ray Computed ; Biomarkers, Tumor ; Ultrasonography

A retrospective study 40 patients with moderate or severe diffuse axonal injury which is defined as posttraumatic coma for over 24 hours without mass lesions or ischemic insults was conducted in order to identify prognostic parameters. The sign of hypothalamic damage and motor reactivities of 40 patients were reviewed and compared to the outcome. The results were as follows ; 1) The ratio of male to female was about 3 to 1 and the peak incidence was at the first decade. 2) Of abnormal brain stem signs, fever of central origin was observed at the early posttraumatic phase and correlated with nonrecovery of consciousness(P<0.05). 3) Of abnormal brain stem signs, abnormal ADH secretion was significantly correlated with nonrecovery of consciousness(P<0.005). 4) Abnormal motor reactivity to pain was significantly correlated with nonrecovery of consciousness(P<0.005). 5) In the group of recovery of consciousness, initial Glasgow coma scale in 40 patients with moderate or severe DAI was significantly correlated with their outcome(P<0.005).
Brain Stem ; Coma ; Consciousness ; Diffuse Axonal Injury* ; Female ; Fever ; Glasgow Coma Scale ; Humans ; Incidence ; Male ; Retrospective Studies

PURPOSE: The purpose of this study was to examine the significance of increased bone density according to whether bone grafts were applied using demographic data with Cone Beam Computed Tomography (CBCT) and to compare the bone densities between before and after implant prosthesis using the Hounsfield index. MATERIALS AND METHODS: Thirty-six randomly selected computed tomography (CT) scans were used for the analysis. The same sites were evaluated digitally using the Hounsfield scale with V-Implant 2.0(TM), and the results were compared with maxillary posterior bone graft. Statistical data analysis was carried out to determine the correlation between the recorded Hounsfield unit (HU) of the bone graft and implant prosthesis using a Mann-Whitney U test and Wilcoxon Matched-pairs test. RESULTS: The bone grafted maxillary posterior teeth showed an increase in the mean values from-157 HU to 387 HU, whereas non-grafted maxillary posterior teeth showed an increase from 62 HU to 342 HU. After implantation, the grafted and non-grafted groups showed significantly higher bone density than before implantation. However, the grafted group showed significantly more changes than the non-grafted group. CONCLUSION: Bone density measurements using CBCT might provide an objective assessment of the bone quality as well as the correlation between bone density (Hounsfield scale) and bone grafts in the maxillary molar area.
Bone Density ; Cone-Beam Computed Tomography ; Data Interpretation, Statistical ; Dental Implants ; Molar ; Prostheses and Implants ; Tooth ; Transplants