• 대한치주과학회:학술대회논문집
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• 대한치주과학회 2001년도 제41회 종합학술대회 연제초록
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• pp.31-31
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• 2001

• Imaging Science in Dentistry
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• 제51권4호
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• pp.461-466
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• 2021

Fibro-osseous lesions are a poorly defined category of conditions affecting the jaws and craniofacial bones, and include developmental lesions, reactive or dysplastic lesions, and neoplasms. Fibrous dysplasia and ossifying fibroma are the 2 main types of fibro-osseous lesions affecting the jaw, and ossifying fibroma is a true benign neoplasm of the bone-forming tissues with several well-recognized variants ranging from innocuous to extensively aggressive lesions. However, multiple simultaneous fibro-osseous lesions of the jaw bones involving all quadrants are exceedingly rare. One such case diagnosed by conventional radiography and computed tomography is discussed here.

• Journal of Korean Dental Science
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• 제16권2호
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• pp.211-217
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• 2023

Fibrous dysplasia (FD) accompanying osteomyelitis (OM) has been reported to result in recurrent, refractory pain and swelling. Although radical resection of the lesions has been suggested, effective surgical treatment strategies have not yet been established due to the limited number of studies on this pathological condition. In this report, we present the conservative surgical management of FD accompanying OM in two patients who exhibited recurrent signs and symptoms. The present report suggests that OM occurring in patients with FD can be successfully managed with conservative surgical treatment and following removal of the odontogenic origin although bone defect in which inflammatory fibro-osseous lesions is removed through decompression surgery may exhibit regeneration of dysplastic bone. In addition, for the prevention of OM in patients with FD, careful clinical examination and thorough management of dental-related pathologies are necessary with regular follow-up examinations to screen for the possibility of malignant changes.

• 대한치과교정학회지
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• 제30권5호
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• pp.509-519
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• 2000

Enlow의 구조적 대응체 분석법은 개개인에서 두개안면의 구성양상이 발달되어온 해부학적, 발육학적 특징의 복합체를 설명하고자 하는 것으로 다수의 평균에 의한 정상치와 비교하는 것이 아니고 개인에게서 나타나는 값을 비교하여 분석하는 방법이다. 본 연구의 목적은 두개안면의 골격형태에 인종적, 지역적으로 골격형태의 변이가 있으므로 한국인에 Enlow의 구조적 대응체 분석법을 적용해봄으로써 한국인 정상교합자에 나타나는 두개안면골격의 특성을 규명해보고자 하였다. 본 연구에서는 안모와 교합상태가 양호하고 교정치료의 경험이 없는 정상 교합자 100명(남자 50명, 여자 50명)을 대상으로 구조적 대응체 분석법을 이용하여 계측점과 계측선을 설정하고, 통계처리하여 다음과 같은 결과를 얻었다. 1. PCF와 PMV 간의 각도는 한국인 남자 평균 $38.54{\pm}2.93^{\circ}$, 여자 $38.43{\pm}2.90^{\circ}$으로 나타났고, Wits' appraisal은 한국인 남자 평균 $-2.51{\pm}3.25$와 여자 $-2.3{\pm}2.26$으로 나타났다. 하악지 배열을 나타내는 R4는 한국인 남자 $1.89{\pm}3.15$, 여자 $2.36{\pm}2.84$를 나타냈다. 2. 후두개저와 하악지의 골격적인 수평 길이 차이를 나타내는 A3-B3에서 여자가 남자보다 유의성있게 더 큰 차이를 나타내고 있어 여자가 남자에 비해 하악지가 후두개저(PCF)보다 더 긴 것으로 나타났다. 3. 상악골과 하악체의 길이 차이를 나타내는 A4-B4에서는 남자가 여자보다 유의성있게 더 큰 차이를 나타내고 있어 남자가 여자에 비해 하악체가 상악골보다 더 긴 것으로 나타났다. 4. 상악과 하악의 수평적인 전체 길이차를 나타내는 Al-Bl에서는 남녀에서 성차를 나타내고 있지 않았다. 이상의 결과에서 한국인은 서양인에 비하여 중안면부가 함몰되고 하악골은 전돌되며 하악지가 후하방으로 회전되어 있는 양상을 보인다. 또한 한국인에서 여자가 남자에 비해 하악지가 후두개저에 비해 더 크며 이에 보상적으로 하악체는 상악골에 비해 남자가 여자에 비해 더 크게 나타나는 것을 볼 수 있었다. 이로인해 결과적으로 상악과 하악의 전체적인 길이 차이에서는 남녀간의 차이를 나타내지 않았다.

• 대한치과교정학회지
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• 제49권1호
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• pp.3-11
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• 2019

Objective: The purpose of this study was to investigate the influence of heritability on the craniofacial soft tissue cephalometric characteristics of monozygotic (MZ) twins, dizygotic (DZ) twins, and their siblings (SIB). Methods: The samples comprised Korean adult twins and their siblings (mean age, 39.8 years; MZ group, n = 36 pairs; DZ group, n = 13 pairs of the same gender; and SIB group, n = 26 pairs of the same gender). Thirty cephalometric variables were measured to characterize facial profile, facial height, soft-tissue thickness, and projection of nose and lip. Falconer's method was used to calculate heritability (low heritability, $h^2$ < 0.2; high heritability, $h^2$ > 0.9). After principal components analysis (PCA) was performed to extract the models, we calculated the intraclass correlation coefficient (ICC) value and heritability of each component. Results: The MZ group exhibited higher ICC values for all cephalometric variables than DZ and SIB groups. Among cephalometric variables, the highest ${h^2}_{(MZ-DZ)}$ and ${h^2}_{(MZ-SIB)}$ values were observed for the nasolabial angle (NLA, 1.544 and 2.036), chin angle (1.342 and 1.112), soft tissue chin thickness (2.872 and 1.226), and upper lip thickness ratio (1.592 and 1.026). PCA derived eight components with 84.5% of a cumulative explanation. The components that exhibited higher values of ${h^2}_{(MZ-DZ)}$ and ${h^2}_{(MZ-SIB)}$ were PCA2, which includes facial convexity, NLA, and nose projection (1.026 and 0.972), and PCA7, which includes chin angle and soft tissue chin thickness (2.107 and 1.169). Conclusions: The nose and soft tissue chin were more influenced by genetic factors than other soft tissues.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제48권2호
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• pp.71-78
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• 2022

This study was conducted to review the efficacy of different sources of stem cells in bone regeneration of cleft palate patients. The majority of previous studies focused on the transplantation of bone marrow mesenchymal stem cells. However, other sources of stem cells have also gained considerable attention, and dental stem cells have shown especially favorable outcomes. Additionally, approaches that apply the co-culture and co-transplantation of stem cells have shown promising results. The use of different types of stem cells, based on their accessibility and efficacy in bone regeneration, is a promising method in cleft palate bone regeneration. In this regard, dental stem cells may be an ideal choice due to their efficacy and accessibility. In conclusion, stem cells, despite the lengthy procedures required for culture and preparation, are a suitable alternative to conventional bone grafting techniques.

• 대한두개안면성형외과학회지
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• 제17권1호
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• pp.14-19
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• 2016

Background: Most nasal bone fractures are corrected using non-invasive methods. Often, patients are dissatisfied with surgical outcomes following such closed approach. In this study, we compare surgical outcomes following blind closed reduction to that of ultrasound-guided reduction. Methods: A single-institutional prospective study was performed for all nasal fracture patients (n=28) presenting between May 2013 and November 2013. Upon research consent, patients were randomly assigned to either the control group (n=14, blind reduction) or the experimental group (n=14, ultrasound-guided reduction). Surgical outcomes were evaluated using preoperative and 3-month postoperative X-ray images by two independent surgeons. Patient satisfaction was evaluated using a questionnaire survey. Results: The experimental group consisted of 4 patients with Plane I fracture and 10 patients with Plane II fracture. The control group consisted of 3 patients with Plane I fracture and 11 patients with Plane II fracture. The mean surgical outcomes score and the mean patient dissatisfaction score were found not to differ between the experimental and the control group in Plane I fracture (p=0.755, 0.578, respectively). In a subgroup analysis consisting of Plane II fractures only, surgeons graded outcomes for ultrasound-guided reduction higher than that for the control group (p=0.007). Likewise, among the Plane II fracture patients, those who underwent ultrasound-guided reduction were less dissatisfied than those who underwent blind reduction (p=0.043). Conclusion: Our study result suggests that ultrasound-guided closed reduction is superior to blind closed reduction in those patients with Plane II nasal fractures.

• 대한두개안면성형외과학회지
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• 제16권3호
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• pp.136-142
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• 2015

Background: The incidence and etiology of facial bone fracture differ widely according to time and geographic setting. Because of this, prevention and management of facial bone fracture requires ongoing research. This study examines the relationship between socioeconomic status and the incidence of facial bone fractures in patients who had been admitted for facial bone fractures. Methods: A retrospective study was performed for all patients admitted for facial bone fracture at the National Medical Center (Seoul, Korea) from 2010 to 2014. We sought correlations amongst age, gender, fracture type, injury mechanism, alcohol consumption, and type of medical insurance. Results: Out of the 303 patients meeting inclusion criteria, 214 (70.6%) patients were enrolled in National Health Insurance (NHI), 46 (15.2%) patients had Medical Aid, and 43 (14.2%) patients were homeless. The main causes of facial bone fractures were accidental trauma (51.4%), physical altercation (23.1%), and traffic accident (14.2%). On Pearson's chi-square test, alcohol consumption was correlated significantly with accidental trauma (p<0.05). And, the ratio of alcohol consumption leading to facial bone fractures differed significantly in the homeless group compared to the NHI group and the Medical Aid group (p<0.05). Conclusion: We found a significant inverse correlation between economic status and the incidence of facial bone fractures caused by alcohol consumption. Our findings indicate that more elaborate guidelines and prevention programs are needed for socioeconomically marginalized populations.

• 대한두개안면성형외과학회지
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• 제21권2호
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• pp.87-91
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• 2020

Background: The incidence of skin cancer, which is primarily caused by exposure to ultraviolet radiation, has steadily increased in recent years. The authors of the present study sought to investigate changes in the epidemiology of skin cancer by conducting a retrospective review of patients diagnosed with skin cancer who received related care at a single medical institution. Methods: The present study included patients who were diagnosed with skin cancer and received treatment at Gyeongsang National University Hospital from 2008 to 2018. The site and type of skin cancer, the number of patients with skin cancer each year, the sex and sex ratio of the patients, and changes in patients' age at first diagnosis were examined through retrospective chart reviews. Results: The number of patients with skin cancer significantly increased, but statistically significant changes were not found in patients' sex, skin cancer sites, or the types of skin cancer. However, patients' age at the first diagnosis of skin cancer showed a statistically significant decrease starting in 2015. Conclusion: In this study, the number of patients with skin cancer increased over time. However, patients' age at first diagnosis has decreased since 2015. Therefore, younger patients should take care to prevent skin cancer, and further research on the causes of skin cancer in younger patients is needed.

• 대한두개안면성형외과학회지
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• 제18권1호
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• pp.16-20
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• 2017

Background: Pyogenic granuloma (PG) is a benign vascular lesion of the mucosa and skin. Recent studies of the epidemiology of PG are rare. We aimed to retrospectively analyze characteristics of PG cases in South Korea. Methods: We reviewed the medical records of 155 patients treated for PG between March 2005 and May 2014. The male-to-female ratio was 1:1.2 (70 males, 85 females). The mean age of patients was 35.3 years. Results: A high occurrence was observed in the first and third decades in males, and the fourth to fifth decades in females. There was a statistically significant difference between genders according to age group (p<0.05). The average lesion diameter was $0.84{\pm}0.46cm$ (long axis). The most frequently involved site was the face (n=47). Bleeding was the primary complication (n=41). PG was mostly treated with excisional biopsy (n=74). The recurrence rate was 7.7% (n=12). Conclusion: We concluded that most common site of PG was the face, the age of female with PG is higher than previous studies, and finger is associated with trauma more than other sites. The most recent epidemiological information on PG of this study will support the treatment and diagnosis of PG and future research objectives.