No abstract available.

This study was undertaken to investigate the relation between orthodontic force magnitude and the amount of tooth movement. And more light force application for reducing root resorption. Twenty-four rats were divided into three experimental groups(A, B, C) based on force magnitude and application method. Springs of 50g force were applied to A group, spring of 100g force were applied to B group and springs of 25g force were applied to C group initially, and after 4 days springs of C group were changed to springs of 50g force. Two kinds of sentalloy(R) (GAC U.S.A) closed coil spring, 50g and 100g, were used. And we made 25g springs by heat treatment process of 50g spring. Each spring was inserted between the maxillary central incisor and the maxillary left first molar. Amounts of tooth movement were measured everyday by digital caliper(Digimatic(R) , Mitutoyo, Japan) under inhalation anesthesia for 15 days, all rats were sacrificed and histological sample were obtained with Hematoxyline-Eosin stan and Masson's trichrome stain. Following conclusion were made : 1. Group B showed the mean cumulative tooth movement of 2.19+/-0.41mm at 15th day, which was greatest among three groups, followed by group C(2.06+/-0101mm), group A(1.90+/-0.49mm) respectively. However, there was no statistically difference among three groups. 2. All groups showed general tooth movement pattern and A, B, C group finished lag phase at 9th, 8th, 7th day, but three was no statistical significance. 3. Group A, B, C showed root resorption and especially group B showed the most severe root resorption and group C showed milder root resorpting than other groups. According to the above results, large initial force with the development of a fairly widespread hyalinized zone may cause severe root resorption, so initial force should be applied lightly to reduce hyalinized area and eventually root resorption and then increased force will induce efficient tooth movement.
Anesthesia, Inhalation ; Animals ; Hot Temperature ; Hyalin ; Incisor ; Molar ; Rats* ; Root Resorption* ; Tooth Movement* ; Tooth*

Decompression ; Follow-Up Studies ; Head ; Headache ; Humans ; Incidence ; Inflammation ; Jaw ; Joints ; Mandibular Condyle ; Recurrence ; Synovial Fluid ; Temporomandibular Joint

Malocclusion

Female ; Follow-Up Studies ; Headache ; Humans ; Incidence ; Neck ; Neck Pain ; Shoulder Pain ; Temporomandibular Joint

Lesions of the skull vault are often incidentally encountered during in plain radiography, CT, and MR imaging of the brain and benign lesions are more common than primary malignancies. The usefulness of plain skull films is limited, but when combined with CT or MRI, there is a high probability of accurate diagnosis. The aim of this essay is to describe a wide range of cranial lesions and to illustrate their distinguishing features.
Brain ; Diagnosis ; Magnetic Resonance Imaging ; Radiography ; Skull*

The clinical and radiological characteristics of progressing in situ thrombosis of the basilar artery have poorly been described. Patients with such condition present with minor neurologic deficits initially, progress in the hospital over several days, and present poor outcomes. We tried to find the common features of those patients that might have been associated with progression. We investigated the clinical pictures, risk factors, possible triggering factors, managements, and radiological data of seven patients whose basilar artery thrombosis progressed in the hospital after having presented with minor neurological deficits at first. The initial clinical presentations included dysarthria plus hemiparesis in four, vertigo plus ataxia in two, and hypersomnolence without sensorimotor deficits in one. In four patients the neurological progressions were preceded by clinical events that might have caused dehydration. On MR angiography (MRA) performed in five, the basilar artery was barely visible in all. Only one patient was under adequate anticoagulation. Intraarterial thrombolysis was done in two patients with partial improvement in one. In conclusion, poor visualization of the basilar artery on MRA may be a strong indicator of early progression of in situ thrombosis. Since dehydration may play as a trigger, sufficient hydration seems to be the best strategy in addition to adequate anticoagulation when basilar artery thrombosis is suspected clinically and radiologically. Once if clinical progression occurs, Intraarterial thrombolysis may be tried.
Angiography ; Ataxia ; Basilar Artery* ; Dehydration ; Disorders of Excessive Somnolence ; Dysarthria ; Humans ; Neurologic Manifestations ; Paresis ; Risk Factors ; Thrombosis* ; Vertigo

Ankylosing spondylitis is a chronic, progressive, inflammatory arthritis that affects principally the sacroiliac joints and spine. Approximately 25% of cases are associated with an acute recurrent nongranulomatous iridocyclitis. This disease occurs most frequently in the second and third decades of the life. Males are affected more frequently than females. There is a striking association between this disease and presence of histocompatibility antigen HLA-B27, which is found in only 4% to 9% of controls. The antigen is present in 88% to 96% of those with ankylosing spondylitis and in 55% of those with uveitis. The authors experienced lease of acute recurrent uveitis associated with ankylosing spondylitis in a 47 year old male patient. We performed radiologic and laboratory examinations. Radiologic examinations revealed the massive and diffuse calcification of all paravertebral ligaments showing a "bamboo spine" appearance. Laboratory examinations revealed elevated ESR and positive HLA-B27. We treated him with the systemic and topical steroids and topical mydriatics, and had a good result.
Arthritis ; Female ; Histocompatibility Antigens ; HLA-B27 Antigen ; Humans ; Iridocyclitis ; Ligaments ; Male ; Middle Aged ; Mydriatics ; Sacroiliac Joint ; Spine ; Spondylitis, Ankylosing* ; Steroids ; Strikes, Employee ; Uveitis*