• Title, Summary, Keyword: etiologic factors

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THE STUDIES ON THE ERUPTION PATTERN OF FIRST PERMANENT MOLARS (제1대구치(第一大臼齒)의 맹출양장(萌出樣狀)에 관(關)한 연구(硏究))

  • Shon, Dong-Su
    • THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY
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    • v.3 no.1
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    • pp.7-11
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    • 1976
  • The author measured the degree of development and the eruption pattern of first permanent molars with orthopantomography in 553 Korean children(male; 302, female; 251) from 4 to 9 years old. The orthopantomographs were obtained from dept. of pedodontics, college of dentistry, Seoul National University. The results of the studies were as follows: 1. Upper first permanent molars were erupted with distal inclination of about 30 degrees in the early stage and they gradually moved in the mesial direction by bodily movement of the tooth to be in contact with the disto-proximal surface of primary secondary molars in the late stage. 2. Lower first permanent molars were erupted with mesial inclination in the early stage and moved mesially by tipping movement of the tooth to be in contact with the disto proximal surface of the second primary molars in the late stage. 3. The eruptive forces were considered to be main etiologic factors of space closure after the premature loss of primary molars.

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ORTHODONTIC CONSIDERATION ON THE IMPACTED TEETH OF ANTERIOR SEGMENT (전치부 매복치에 관한 교정학적 고찰)

  • Yang, Won-Sik
    • The journal of the Korean dental association
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    • v.16 no.1
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    • pp.37-42
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    • 1978
  • A study on the impacted teeth of the anterior segment was carried out. The data for this study were compiled form 1739 outpatients of the Department of Orthodontics, College of Dentistry, Seoul National University. The following conclusions were obtained; 1. The frequency of the impacted teeth of the anterior segment was 2.8% and the frequency of male was 4.0%, that of female was 2.1%., respectively. 2. The order of occurrence of the impacted teeth in the anterior segment was maxillary canine mesiodens, maxillary central incisor, maxillary lateral incisor, mandibular canine. 3. The etiologic factors of the impaction were the space deficiency for eruption, cleft palate, the prolonged retention of deciduous teeth, dentigerous cyst. 4. The favorable results of treatment and prognosis were obtained from the impacted teeth of the normal shape after surgical exposure and adhered the plastic attachment and inducted them into the dental arch.

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Clinical Evaluation of Spontaneous Pneumothorax A Review of 165 cases (자연기흉의 임상적 고찰: 165례)

  • 성후식
    • The Korean Journal of Thoracic and Cardiovascular Surgery
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    • v.18 no.4
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    • pp.582-588
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    • 1985
  • We have observed 165 cases of spontaneous pneumothorax from Aug. 1978 to May. 1985 at the department of Thoracic and Cardiovascular Surgery, School of Medicine, Keimyung University. The ratio of male to female cases were 8.2:1 in male predominance, and the incidence was highest in the adolescence between 21 to 30 year of age. There were 85 patients of primary spontaneous pneumothorax and 80 patients of secondary spontaneous pneumothorax. The etiologic factors of secondary spontaneous pneumothorax were tuberculous origin in 50 cases, chronic bronchitis with emphysematous bullae or blebs in 17 cases, asthma in 10 cases and lung cancer in 3 cases. Closed thoracotomy was performed for reexpansion of collapsed lung in 153 cases, bed rest in 3 cases, needle aspiration in 5 cases and open thoracotomy in 14 cases. Closed thoracotomy was the main therapeutic approach of choice in the great majority of spontaneous pneumothorax with recurrence rate of 21.6%. However, open thoracotomy was undertaken in patients with continuous air leakage, recurrent episodes, bilateral pneumothorax and large visible apical blebs or bullae.

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clinical evaluation of spontaneous pneumothorax -A review of 186 cases- (자연기흉의 임상적 고찰)

  • Kim, Jong-Jin;Jang, Jeong-Su
    • The Korean Journal of Thoracic and Cardiovascular Surgery
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    • v.20 no.2
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    • pp.251-255
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    • 1987
  • In this study, 186 cases of spontaneous pneumothorax experienced at the Dept. of thoracic and Cardiovascular surgery, chosun University Hospital during from Jan. 1978 to Mar. 1987 were analysed retrospectically. The results were as follows: 1. The sex ratio of the stadied patient was 2.5:! in male prominence and the incidence and the incidence was highest in the adolescence between 20-29 year of age. 2. The clinical symptoms were frequently Dyspnea (52.2%) and Chest pain (38.7%). The etiologic factors were as follows, Tuberculous origin in 55.9%, Unknown origin in 17.2%, Bullae in 11.8%. 3. In the method of treatment, closed thoracotomy was the most effective procedure in achieving the expansion of collapsed lung in 87.1%. Other methods were bed rest with high oxygen inhalation, thoracentesis and open thoracotomy. 4. The incidences of complication were developed in 12.4% and recurrent rates were seen in 9.7%.

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A Clinical Study of Bilateral Spontaneous Pneumothorax (양측성 자연기흉의 임상적 고찰)

  • 인강진
    • The Korean Journal of Thoracic and Cardiovascular Surgery
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    • v.22 no.6
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    • pp.1044-1048
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    • 1989
  • In this study, 26 cases of bilateral spontaneous pneumothorax experienced at the department of thoracic and cardiovascular surgery, Chungnam National University Hospital during from 1985 to August 1989 were analyzed retrospectively. The results were as follows; 1. The incidence of bilateral spontaneous pneumothorax was 13.5 % and sex ratio was 7.7:1 with male preponderance. 2. Among the nonsimultaneously occurring cases of bilateral pneumothorax, 12 patients [75 %] were developed at contralateral side within a year. 3. The most patients [65.4%] belonged to the age group between 15 and 25 year-old, and among 57 male patients suffered spontaneous pneumothorax in the same age group, 16 cases[28%] developed bilaterally. 4. The etiologic factors were as follows; blebs or bullae; 65.4 %, tuberculosis; 15.4 %, unknown; 19.2 %. 5. In the method of treatment, 15 patients were treated by closed tube thoracotomy and underwater-seal drainage only, 10 patients were treated by open thoracotomy. One patient died of respiratory failure due to severe destructed lung.

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A STUDY ON RADICULAR CYSTS OF PRIMARY TEETH MIMICKING DENTIGEROUS CYSTS (함치성 낭종으로 오인되는 유치의 근단성 낭종에 관한 연구)

  • Cho Bong-Hae;Nah Kyung-Soo
    • The Journal of Korean Academy of Maxillofacial Radiology
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    • v.24 no.2
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    • pp.239-247
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    • 1994
  • 20 radicular cysts of primary teeth mimicking dentigerous cyst were reviewed. The following results were obtained. 1. The patients' age ranged from 7 to 14 years. Males(60%) were more involved than females(40%). 2. The mandible(85%) was affected more frequently than the maxilla(15%) The mandibular deciduous molar area(80%) was the most frequently involved. 3. The diameter of the cyst varied from 10 to 30㎜. 55% of permanent successors showed underdeveloped roots less than one-third. 4. The etiologic factors were pulp-treated teeth(65%), severe caries (20%), trauma(10%), deep amalgam filling(5%).

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ACUTE MEDIASTINITIS FROM ODONTOGENIC INFECTION : A CASE REPORT (치성감염후 발생한 급성 종격동염의 치험례)

  • Jang, Ki-Young;Shin, Mi-Jung;Kim, Do-Gyeun
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.17 no.3
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    • pp.296-301
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    • 1995
  • Acute mediastinitis is almost always secondary to some other condition, and most cases are due to esophageal perforation. Although acute mediastinitis from odontogenic infection is extremely rare in the era of antibiotic drugs, some more fulminant odontogenic infections can produce complications including airway obstruction, necrotizing fascitis and extension of the infection to thorax. Irrespective of the changing incidence of etiologic factors, unless the pathophysiology of acute mediastinitis and its causes are understood and the conditions promptly recognized and properly treated, the result may be prolonged illness and even death. We experienced a case of odontogenic infection followed by acute mediastinitis and present review of literature.

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Treatment of Deep Thrombosis (심부정맥혈전증의 치료)

  • 왕옥보
    • The Korean Journal of Thoracic and Cardiovascular Surgery
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    • v.25 no.11
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    • pp.1358-1361
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    • 1992
  • During the past 4 years, 18 cases of deep vein thrombosis were treated. Diagnosis was based on clinical symptoms, phlebography and vascular Doppler examination. Etiologic factors were mainly trauma, operation and immobilization of the lower extremities. Seven patients were treated surgically and eleven patients medically. The indications for surgical thrombectomy included phlegmasia cerulea dolens [N=6], and phlemasia cerulea dolens with focal venous gangrene[N=1]. The comparative analysis of each treatment methods was done after a mean observation period of 6 months. Good clincal results were observation in 4 patents in surgically treated [57.1%], and 4 in conservative management group[36.3%]. There were no mortality in the both surgical and medically treated group but one patient with phlegmasia cerulea dolens and focal venous gangrene was dischared in moribund state at the third postoperation day due to sepsis and multiorgan failure. We believe that aggressive early surgical thrombectomy should be stronly considered for patients of phlegmasia cerulea dolena.

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Protective Effect of Chlorpromazine for the Isolated Rat Heart from Reperfusion Injury (Chlorpromazine 이 과분극 정지심장의 재관류 손상에 미치는 보호효과)

  • 류한영
    • The Korean Journal of Thoracic and Cardiovascular Surgery
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    • v.23 no.1
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    • pp.9-15
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    • 1990
  • This study was designed to investigate the protective effect of chlorpromazine against the reperfusion injury of myocardium after high potassium cardioplegic arrest. Langendorff`s preparations of rat heart were infused with high potassium cardioplegic solution[St. Thomas Hospital Solution] at 25oC. Chlorpromazine [10-7M] increased the recovery of myocardial contractility[dp/dt], left ventricular pressure[LVP], and coronary flow rate of the reperfused heart. Both in control and experimental groups, the restoration of myocardial activity could not reach to the level of preplegic control. These results suggest that the etiologic factors of the reperfusion injury include the influence of high potassium cardioplegic solution and/or reperfusion itself, and that chlorpromazine protects myocardium from the reperfusion injury.

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Understanding the Conception of Stress regard in the Oriental Medicine (스트레스의 개념에 대한 한의학적 해석)

  • Ahn, Sang-Woo
    • Korean Journal of Oriental Medicine
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    • v.3 no.1
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    • pp.119-151
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    • 1997
  • Conclusions for the relationship between a conceptional model of stress theory and its examination based on the Oriental medicine; 1. It was considered that a general conception of stress is included into the meaning of Ki in the Oriental medicine. 2. The response-based model to stress could be comparable to a conception of Ki-pathogens interchange In the Onental medicine. 3. The stimulus-based model may be explained as a modern conception of immoderation feeling related with an internal etiological factor, specially injury of seven emotions, among three groups of etiological factors for disease. 4. The feedback conception based on the interaction model could explain the principal of reversible emotion therapy in the nine Ki. 5. In the Oriental medicine, a study to clarify a emotional etiologic factor and its pathophysiologlcal mechanism has been continued for long time before establishment of stress theory.

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