• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.48 no.5
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• pp.303-308
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• 2022

Objectives: Selection of treatment methods for mandibular condylar fractures remains controversial. In this study, we investigated treatment methods for condylar fractures to determine the indications for open or closed reduction. Patients and Methods: Patients >12 years of age treated for mandibular condylar fractures with a follow-up period of ≥3 months were included in this study. The medical records of enrolled patients were reviewed for sex, age, fracture site, treatment method (open or closed reconstruction), postoperative intermaxillary fixation period, operation time, and complications. Radiological analysis of fracture fragment displacement and changes in ramal height difference was performed using computed tomography and panoramic radiography. Results: A total of 198 patients was investigated, 48.0% (n=95) of whom underwent closed reduction and 52.0% (n=103) underwent open reduction. There was no significant correlation between reduction method and patient sex, age, or follow-up period. No statistically significant difference between the incidence of complications and treatment method was observed. None of the patients underwent open reduction of condylar head fracture. Binary logistic regression analysis showed that open reduction was significantly more frequent in patients with subcondylar fracture compared to in those with a fracture in the condylar head area. There was no statistically significant correlation between the groups and fracture fragment displacement. However, there was a significant difference between the treatment groups in amount of change in ramal height difference between the fractured and the non-fractured sides during treatment. Conclusion: No significant clinical differences were found between the open and closed reduction methods in patients with mandibular condylar fractures. According to fracture site, closed reduction was preferred for condyle head fractures. There was no significant relationship between fracture fragment displacement and treatment method.

• The Journal of the Korean dental association
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• v.19 no.4 s.143
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• pp.353-359
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• 1981

• Journal of Chest Surgery
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• v.17 no.1
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• pp.110-117
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• 1984

A clinical evaluation was performed on 76 cases of chest injury experienced at department of Chest Surgery, Capital Armed Forces General Hospital during the past 3 years period from January 1981 to August 1983. 1.The most common cause of the chest trauma was gun shot by which 26 cases were injured among 44 cases [57.9%] of penetrating injury. Remaining 32 cases [42.1%] were injured by non-penetrating blunt trauma. 2.Hemopneumothorax was observed in 60 cases [78.9%], those were caused by both penetrating [65%] and non-penetrating [35%] injuries. 3.Rib fracture was found in 58.7% of total cases and with rib fracture, clavicle fracture was combined at 19.6% and sternal fracture, at 8.7%. 4.Most common symptoms were chest pain and dyspnea, and most common signs were breath sound diminution and subcutaneous emphysema. 5.Common site of rib fracture was from 4th rib to 8th rib [69.4%]. 6.In 58 cases [76.3%], patients were treated with operation including open thoracotomy [25 cases]. 7.Overall mortality was 5.3%[4 cases] and causes of death were septic shock and respiratory failure.

• Journal of Powder Materials
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• v.9 no.3
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• pp.148-152
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• 2002

The microstructures and indentation fracture of pressureless-sintered $DyNbO_4$ crystalline were investigated as a basic study for the application of weak phase of fibrous monolithic composites. They were comprised with many lamella twins as well as micro-cracks at the grain boundaries. The hardness at room temperature was remarkably low value(575 Hv) due to the low relative density and existence of microcracks at grain boundaries. The main fracture mode was a typical intergranular fracture, and showed remarkable micro-cracking effect. The heavy plastic deformation was observed around the site of indentation. In addition, the $DyNbO_4$ was expected to apply as a weak phase in the fibrous monolithic composites because of the low hardness and easily plastic deformation that could be led the preferable pulled-out and microcracking toughening under the failure.

• Journal of Korean Foot and Ankle Society
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• v.14 no.2
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• pp.194-196
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• 2010

Avulsion fracture of medial cuneiform by tibialis anterior tendon is quite rare. It has been reported about the avulsion fracture and surgical repair of tibialis anterior tendon rupture at distal insertion site of medial cuneiform in Korea. We report a case of right foot medial cuneiform avulsion fracture by tibialis anterior tendon after autobike accident and describe this case with a review of literature.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.11 no.1
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• pp.41-49
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• 1989

This is a retrospective study on facial bone fractures of Koreans. This study was based on a series of 110 patients who had been treated for facial bone fractures as in-patient at Guro Hospital, School of Medicine, Korea University for the period of September, 1984. to August, 1988. The results were obtained as follows : 1. 2nd decade(42.7%) was the highest age group in incidence, and age range was 2 years to 72 years, and the ration of Male/Female was 3.7 : 1. 2. Falling was most frequent cause of facial bone fractures(40.9%) 3. The frequent location of facial bone fractures were mandibule(67.1%), zygoma & zygomatic arch(11.7%), maxilla(10.9%), and others in order. 4. In mandibular fractures, one site fractures showed 30.1% and two site fractures showed 58.8% and triple site fractures showed 11.1%. The most frequent site of mandibular fracture was symphysis(32.7%) 5. The most frequent month of facial bone fracture was September.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.40 no.1
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• pp.21-26
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• 2014

Objectives: The purpose of this article is to analyze the incidence, demographic distribution, type, and etiology of mandible fractures that were treated by the Department of Oral and Maxillofacial Surgery in Kyung Hee University Dental Hospital from January 2002 to December 2012. Materials and Methods: This was a descriptive and analytic retrospective study that evaluated 735 patients that were treated for mandible fracture. Results: This study included 1,172 fractures in 735 patients. The ratio of male to female patients was 5.45 : 1; the maximum value was in patients between 20 and 29 years (38.1%) and the minimum in patients over 70 years old. The monthly distribution of facial fractures peaked in the fall and was lower during winter. No specific correlation was identified based on the annual fracture distribution. Among the 735 fracture patients, 1.59 fracture lines were observed per patient. The most frequent site was the symphysis, which accounted for a total of 431 fractures, followed by the angle (348), condyle (279), and body (95). The symphysis with angle was the most common site identified in combination with fracture and accounted for 22.4%, followed by symphysis with condyle (19.8%). The angle was the most frequent site of single fractures (20.8%). The major cause of injury was accidental trauma (43.4%), which was followed by other causes such as violence (33.9%), sports-related accidents (10.5%), and traffic accidents (10.1%). Fracture incidents correlated with alcohol consumption were reported between 10.0%-26.9% annually. Conclusion: Although mandible fracture pattern is similar to the previous researches, there is some changes in the etiologic factors.

• Journal of Chest Surgery
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• v.28 no.6
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• pp.601-605
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• 1995

Clinical evaluations were performed on 54 cases of the traumatic sternal fracture, those were admitted and treated at the department of Thoracic and Cardiovascular Surgery in Chosun University Hospital during the past 5 years period from January 1990 to December 1994. The frequency was about 7.8% of the nonpenetrating chest trauma. The ratio of male to female was 2 : 1 in male predominance. Average age was 45.7 years old and age distribution was from 18 to 80 years old. The most common cause in the sternal fracture were high decelerating injury[ 38 cases . The most common fracture site was sternal body. Associated intrathoracic organ injuries were cardiac contusion[11cases , hemopneumothorax and pulmonary contusion. Added, thoracic cage and extrathoracic organ injuries were rib fracture, head injuries, thoracic spinal fracture and long bone fracture. Abnormal ECG findings were sinus bradycardia[4 cases , sinus tachycardia[3 cases , bundle branch block, atrial fibrillaton, left ventricular hypertrophy and myocardial ischemia. The average days of admission was 19.1 days. All patients were treated with conservative treatment. The complications after treatment were atelectasis[2 cases ,empyema[1 cases , ARDS[1 cases .

• Archives of Craniofacial Surgery
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• v.9 no.1
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• pp.12-16
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• 2008

Purpose: Closed reduction is most common treatment method for nasal bone fracture but it requires secondary correction operation commonly. For preventing secondary revision, we applied ultrasonography during closed reduction of nasal bone fracture and examined the result of operation. Methods: 80 patients were sorted into 2 groups, ultrasound-guided closed reduction group(n=40) and manual closed reduction group(n=40). We classified the unilateral fracture involving lower 1/2 of nasal bone into type I, the bilateral fracture involving lower 1/2 of nasal bone into type III and the fracture of upper 1/2 of nasal bone into type III. The occurrence rate of overcorrection and undercorrection were evaluated by comparing preoperative and postoperative MDCT(Multi Direction Computed Tomography). Results: In manual closed reduction group, overcorrection were found in 4 patients and undercorrection were found in 3 patients. In ultrasound-guided closed reduction group, overcorrection was not observed and undercorrection was observed in 2 patients. Conclusion: Intraoperative ultrasound evaluation of nasal bone fracture resulted in reduced occurrence rate of secondary nasal deformities, showed easier detection of the fractured site and have superiority upon simple physical examination or simple x-ray.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2000.09a
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• pp.129-137
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• 2000

This paper presents groundwater flow characteristics in discontinuous rock mass using fracture network program(NAPSAC) by statistical approach. Equivalent permeability coefficients are estimated from borehole data around Mabuk test tunnel site and fracture map on the arch of the tunnel. The reliability of fracture network model is obtained from determination of input data for statistical fracture network analysis from the real data(data of fracture network, data of hydraulic tests). The variation of permeability and mean anisotropic permeability coefficients are calculated from the realized model by increasing the size. As a result of analysis, a strong anisotropy of permeability is observed according to the direction of the fracture sets around the test tunnel.