PURPOSE: To research about maxillofacial traumatic injuries of children in aspects of gender difference, various incidence rates between age, trauma type, cause, monthly and daily incidence rate, type of tooth damage, gingival damage, soft tissue damage, and type of facial bone fracture. MATERIALS AND METHODS: Study group consisted of children under 15 years of age who visited Dental Hospital, School of Dentistry, Kyung Hee University from 2004/7/1 to 2007/6/30 with chief complaint of oral and maxillofacial traumatic injuries. 1,559 cases of traumatic injuries were studied from 1,556 (1,004 male, 552 female) children. CONCLUSION: 1. There were slightly more boys than girls, giving a male-to-female ratio of 1.82:1.0. The 1-3 year old boys and girls had the highest number of traumatic injuries. 2. Of the 1,556 patients, 68.63% had soft tissue injuries, 50.22% had periodontal injuries, 29.89% had teeth injuries, and 3.85% had maxillofacial bone fractures. 3. Falling down was the most common cause of injury in both sexes. 4. The months with the highest incidence rates were in order May (12.12%), June (11.74%), and October (11.13%). Most of the injuries occurred on weekends. 5. The most common tooth injury was uncomplicated crown fracture, and the most common periodontal injury was subluxation. The majority of traumatizes teeth were the upper central incisors. 6. The most common soft tissue injury was intraoral lacerations. 7. Mandibular fractures were most frequent in facial bone fractures; symphysis, condylar head, and angle fractures were most frequent in mandibular fractures; maxillary and nasal bone fractures were most frequent in midfacial bone fractures.
Child ; Crowns ; Dentistry ; Facial Bones ; Fractures, Bone ; Head ; Humans ; Incidence ; Male ; Mandibular Fractures ; Maxillofacial Injuries ; Nasal Bone ; Soft Tissue Injuries ; Tooth ; Tooth Injuries

OBJECTIVES: This study was to evaluate the impacts of simultaneous exposure to noise and mixed solvents on workers'hearing threshold level (HTL) over five-year period. METHODS: The study was conducted by interview and annual audiometric test on workers in ship building industry from 1994 to 1998. The cases(workers who exposed to noise and mixed solvent simultaneously) were 43 male workers and controls (workers who exposed to nolle) were selected by matching method with regard to age, sex, carrier, and noise exposure level. To assess the impacts of solvent exposure on hearing threshold level, with considering other factors, general liner model was used. RESULTS: 1. The audiogram of all subjects showed typical sensorineural hearing loss pattern. The mean HTLe were increased at high frequency (4000HB and 8000Hz) for study period. 2. The HTLs of cases were more increased than those of controls at high frequencies (4000Hz and 8000Hz), but there was not statlstical significance. 3. The impact of age on the HTL was statistically significant at 250Hz and 500Hz (p(0.05), and the impact of noise on the HTL was statistically significant at 250Hz, 2000Hz and 4000Hz (p(0.05), but the impact solvent exposure on the HTL was not significant. 4. The changes in HTLs of cases were higher than those of controls at high frequency, there were not statistical significance at 4000Hz, but only at 8000Hz (p=0.087). 5. Statistical analysis of the general linear model implicated that the changes in HTL was impacted by noise exposure bevel significantly (p=0.031) and Impacted by solvent exposure weakly (p=0.087) at 8000Hz. CONCLUSIONS: The results of this study suggest that workers who simultaneously exposed to noise and mixed solvent were at risk for more affected HTL than those exposed to noise exposure only, but we could not find definitive evidence. Further detailed studies must be made in large number of workers.
Construction Industry ; Hearing Loss* ; Hearing Loss, Sensorineural ; Hearing* ; Humans ; Linear Models ; Male ; Noise ; Ships ; Solvents

OBJECTIVES: Externalized behavioral problems are prevalent in adolescents, due to the difficulties associated with this developmental stage. Conduct Disorder (CD) and Oppositional Defiant Disorder (ODD), as well as other psychiatric disorders, such as major depressive disorder, result in the manifestation of many behavioral problems during adolescence. METHODS: For this report, we analyzed a sample of 31 adolescents, each of whom had presented with CD or ODD at Chosun University Hospital between 2002 and 2010. We separated subjects into depressed and non-depressed groups according to their Beck Depression Inventory scores (BDI<10, non-depressed ; BDI> or =10, depressed). Then we analyzed for neuropsychological differences between the depressed and non-depressed groups. RESULTS: In our sample, adolescents in the depressed group showed less of a stealing (deceitfulness and/or theft) behavioral pattern and presented with more anxiety symptoms, lower self-esteem, and greater sensitivity in interpersonal relationships, as compared to the non-depressed group. CONCLUSION: When adolescents exhibit disruptive behavior, clinicians should consider the underlying causes of the behavior.
Adolescent ; Anxiety ; Attention Deficit and Disruptive Behavior Disorders ; Conduct Disorder ; Depression ; Depressive Disorder, Major ; Humans ; Theft

Cysts of the salivary gland are non-neoplastic, localized lesions of the duct system. They form about 6 % of lesions of the salivary glands. Mucoceles represent more than 70% of the salivary cysts and usually arise from minor salivary glands; however, major salivary glands, especially the sublingual glands, may also be involved. Characteristically, mucoceles consist of a soft fluctuant bluish or translucent swelling which contain mucus, varying in size. They are most commonly found on the lower lip, but may also occur on the buccal mucosa, floor of the mouth, palate, upper lip, and tongue. They are found in all age groups but are most frequent in children and young adults. There are two types of mucoceles-one in which mucus has extravasated into the tissues (extravasation cyst) and one which is lined with epithelium (retention cyst). Recently, we experienced an unusual case of huge extravasation mucocele arising from the submandibular gland. The mucocele and submandibular gland were completely excised surgically, which were confirmed by computed tomographic scanning and histopathologic examination.
Child ; Epithelium ; Humans ; Lip ; Mouth ; Mouth Mucosa ; Mucocele* ; Mucus ; Palate ; Salivary Glands ; Salivary Glands, Minor ; Sublingual Gland ; Submandibular Gland* ; Tongue ; Young Adult

Primary intraosseous carcinoma (PIOC) is a rare odontogenic carcinoma defined as a squamous cell carcinoma arising within a jaw having no initial connection with the oral mucosa, and probably developing from residues of the odontogenic epithelium. PIOC appears more common in male than female, especially at posterior portion of the mandible. Radiographic features of PIOC show irregular patterns of bone destruction with ill defined margins. It could be sometimes misdiagnosed as the cyst or benign tumor because it shows well defined margins. If it couldn't be done appropriate treatment initially, PIOC shows extremely aggressive involvement, extensive local destruction and spreads to the overlying soft tissue. Therefore accurate diagnosis in early state is necessary. The diagnosis criteria proposed for PIOC are : (1) absence of ulcer formation, except when caused by other factors, (2) histologic evidence of squamous cell carcinoma without a cystic component or other odontogenic tumor cell, and (3) absence of another primary tumor on chest radiograph obtained at the time of diagnosis and during a follow-up period of more than 6 month(Suei et al., 1994).
Carcinoma, Squamous Cell ; Diagnosis ; Epithelium ; Female ; Follow-Up Studies ; Humans ; Jaw ; Male ; Mandible* ; Mouth Mucosa ; Odontogenic Tumors ; Radiography, Thoracic ; Ulcer

No abstract available.
Female ; Humans ; Low Back Pain*

Amelogenesis Imperfecta ; Amelogenesis ; Dental Caries ; Dental Enamel ; Genetic Diseases, Inborn ; Humans ; Malocclusion ; Orthognathic Surgery ; Prosthodontics ; Tooth ; Vertical Dimension