• Archives of Plastic Surgery
• /
• v.40 no.5
• /
• pp.542-545
• /
• 2013

Background The aims of alveolar bone grafting are closure of the fistula, stabilization of the maxillary arch, support for the roots of the teeth adjacent to the cleft on each side. We observed nostril base augmentation in patients with alveolar clefts after alveolar bone grafting. The purpose of this study was to evaluate the nostril base augmentation effect of secondary alveolar bone grafting in patients with unilateral alveolar cleft. Methods Records of 15 children with alveolar clefts who underwent secondary alveolar bone grafting with autogenous iliac cancellous bone between March of 2011 and May of 2012 were reviewed. Preoperative and postoperative worm's-eye view photographs and reconstructed three-dimensional computed tomography (CT) scans were used for photogrammetry. The depression of the nostril base and thickness of the philtrum on the cleft side were measured in comparison to the normal side. The depression of the cleft side pyriform aperture was measured in comparison to the normal side on reconstructed three-dimensional CT. Results Significant changes were seen in the nostril base (P=0.005), the philtrum length (P=0.013), and the angle (P=0.006). The CT measurements showed significant changes in the pyriform aperture (P<0.001) and the angle (P<0.001). Conclusions An alveolar bone graft not only fills the gap in the alveolar process but also augments the nostril base after surgery. In this study, only an alveolar bone graft was performed to prevent bias from other procedures. Nostril base augmentation can be achieved by performing alveolar bone grafts in children, in whom invasive methods are not advised.

• Korean Journal of Head & Neck Oncology
• /
• v.7 no.1
• /
• pp.24-34
• /
• 1991

Lymphangioma is a benign, growth of lymphatic tissue that is present at birth or develops in early childhood, which may cause serious alterations in growth and developmemt. The problems with facial lymphangioma is usually releated directly to their size and to the area of the face which is involved. The lesions themselves may range from small, localized blemishes to huge facial masses involving both soft tissue and underlying bone and causing great distortion and asymmetry. The facial bones are seldom involved, but the natutal evolution of an individual lesion often cannot be accurately predicted when the child is first seen. Any changes in the underlying facial bone could be due either to a direct growth of the lesion into the bone, or secondary to pressure of the lesion growing outside the bone itself. A case of cystic lymphangioma extending from the neck to the tongue is reported. A six-year-old female was admitted because of swelling of the tongue. At that time, the tongue reportedly reached the extraoral size of 7x5x2.5cm and a soft, diffuse swelling of left anterior neck was revealed. The removal of cystic mass including left neck dissection and partial glossectomy were undertaken. The another case of lymphangioma is located on mandibular cheek. A twenty nine-year-old male was admitted because of palpable mass of the left mandibular area and fissure of palate. The radical excision of mass with mandibulectomy of body were undertuken. Thus we reported such a rare case and reviewed the lymphangioma.

• Korean Journal of Head & Neck Oncology
• /
• v.15 no.2
• /
• pp.166-171
• /
• 1999

Background and Objectives: The aim of our study was to describe the appearance of recurrent and residual lesions in the head and neck tumors, and to evaluate the usefullness of CT and MRI. Materials and Methods: CT(n=42) and MRI(n=4) of 44 patients with recurrent head and neck tumors were reviewed retrospectively. Primary tumor sites were larynx/hypopharynx in 15, oral cavity/floor of mouth in 13, base of tongue/tonsil in 5, nasopharynx in 4, palate in 2, and others in 5 patients. Therapeutic modalities included sugery and radiotherapy in 23, radiotherapy in 11, surgery in 5, chemotherapy and radiotherapy in 4, and chemotherapy in 1 patient. Results: The patterns of tumor recurrence were nodal recurrence(n=17), primary tumor bed recurrence combined with nodal recurrence(n=12), primary tumor bed recurrence(n=10) and residual primary tumors(n=5). The most common appearance of residual/recurrent primary tumor on CT was focal or diffuse heterogenous mass with or without surrounding fat or muscle infiltration(25/27). On MRI, the recurrent lesions showed intermediate signal intensity on T1 weighted image and high signal intensity on T2 weighted image with heterogenous enhancement in the most cases(n=3). 38 out of 44 nodal recurrences(86%) which had been pathologically or clinically proved were more than 1 cm in diameter or contained central low density on CT scan. Conclusion: Although CT and MRI findings of recurrent and residual tumors of the head and neck were nonspecific, in the majority the lesions manifested as a mass at primary tumor bed and/or nodal disease including contralateral side of the neck. And CT and MRI are valuable for revealing above lesions.

• Korean Journal of Head & Neck Oncology
• /
• v.29 no.2
• /
• pp.41-47
• /
• 2013

Background : The purpose of this study is to review our experience with the variable applications of the facial artery muscolomucosal(FAMM) flap for oral cavity reconstruction following treatment for head and neck malignancies. Methods : We performed retrospect medical record review from January 2012 to June 2013. This flap technique was applied in 3 patients to reconstruct the defects of oral cavity induced by treatment for head and neck malignancies. Results : The defects and fibrosis occurred due to variable causes related to previous treatment for head and neck malignancies such as tumor resection and chemoradiation. Two patient suffered from defect on hard and soft palate and one patient suffered from trismus related to fibrotic scar band. We performed oral cavity reconstruction using FAMM flap even though these all patients had history of neck dissection surgery or radiation therapy. Conclusion : FAMM flap is an ideal option for reconstruction following treatment not only for primary tumor resection but also for defects induced by variable causes. Preoperative radiation and neck dissection surgery, which are previously considered as some challenges, are no longer contraindication in our cases.

• Journal of the Korean Society of Food Culture
• /
• v.27 no.3
• /
• pp.261-273
• /
• 2012

To find an efficient solution for the globalization of Korean food in Brazil, we conducted a survey about the satisfaction of Brazilian natives who had visited a Korean restaurant, and possible suggestions for improvement. We also conducted indepth interviews with 13 owners of Korean restaurants in Seo Paulo, Brazil, about their plans to improve Korean food to be more appealing to the Brazilian palate. Our research shows that Korean restaurants had a below average reputation for employee kindness, menu taste and variety, interior, mood, and accessibility. As a result of the survey, we found that Korean restaurants were considered in general to be below average. The survey also showed that the higher the level of a person's economic standing, the less satisfaction they had with Korean food restaurants. We also found that the most common pieces of advice that Brazilian women had regarding Korean restaurants were to offer more variety in the menu, maintain a cleaner restaurant, and to actively engage in public relations. The general concerns of everyone surveyed focused on cleanliness and public relations of the restaurant. However, food-related people focused more on the taste and quality of the food. Sao Paulo is currently the most well-developed economic center in South America, so the world's food service industry is pushed to the front of its ongoing development. For Korean food to make inroads into Brazil, Korean restaurants need to change the niche that they occupy. First-generation family businesses and second-generation specialized family businesses coexist in that city. So first of all, to localize the Korean food for Brazilian tastes, a menu system that will easily allow natives to access Korean food must be established. And second of all, it must support the total food culture by improving distribution, sanitation management, and marketing methods that can get the natives to like Korean food ingredients.

• Journal of Korean Academy of Oral and Maxillofacial Radiology
• /
• v.14 no.1
• /
• pp.81-87
• /
• 1984

This study was performed to observe the secondary images and to analyse the relationships between the primary and secondary images in panoramic radiograph. Using the Moritta's Panex-EC panoramic x-ray machine and the human dry skull, the author analysed 17 radiographs which were selected from 65 radiographs of the dry skull that attached the radiopaque materials, and the attached regions of the radiopaque materials were the normal anatomical structures which were important and selected as a regions for the evaluation of the secondary images effectively. The results were as follows; 1. The cervical vertebrae showed three images. The midline image was the most distorted and less clear, and bilateral images were slightly superimposed over the posterior border of the mandibular ramus. 2. In mandible, the secondary image of the posterior border of the ramus was superimposed on the opposite ramus region, and this image was elongated from the anterior border of the ramus to the lateral side of the posterior border of the ramus. The secondary image of the condyle was observed on the upper area of the coronoid process, the sigmoid notch and the condyle in opposite side. 3. In maxilla, the posterior region of the hard palate showed the secondary image on the lower part of the nasal cavity and the medial wall of the maxillary sinus. 4. The primary images of the occipital condyle and the mastoid process appeared on the same region, and only the secondary image of the occipital condyle was observed symmetrically on the opposite side with similar shape to the primary one. 5. In the cranial base, the anatomical structures of the midsagittal portions like a inferior border of the frontal sinus, sella turcica, inferior borderr of the sphenoid sinus and inferior border of the posterior part of the occipital bone showed the simillar shape between the primary and secondary images symmetrically. 6. The petrous portion of the temporal bone showed the secondary image on the lateral side of the sella-turcica, and the secondary images of the posterior border of lesser wing, superior border of greater wing of the sphenoid bone and posterior border were observed on the anterior-superior and inferior region of the sella-turcica.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• v.30 no.3
• /
• pp.228-233
• /
• 2004

Summary: The malignant peripheral nerve sheath tumor(MPNST) is an aggressive neoplasm and can either arise independently or result from malignant change in preexisting neurofibromatosis (von Recklinghausen's disease). Its histologic characteristics remain controversial, but currently it is believed that the schwann cell is the origin of the peripheral nerve sheath tumors. MPNST is an uncommon neoplasm of the head and neck region, and its presentation in the oral cavity is quite rare. In this study, we report a patient with a rare case of a MPNST involving the maxilla. A case report: A 29-year-old female presented with a chief complaint of painless swelling with bleeding tendency on the left maxillary tuberosity area 2 months ago. Clinical examination showed a $5.0{\times}3.0cm^2$ sized, indurative swelling on the site. Conventional radiographs showed a relatively well-defined soft tissue mass involving the left maxillary sinus, and destruction of the anterior, posterolateral walls of the left maxillary sinus. Subtotal maxillectomy and split-thickness skin graft from thigh were undertaken. In histochemical and immunohistochemical studies, the specimen revealed positive reactivities to Vimentin and S-100 protein. Final diagnosis was made as MPNST.

• Imaging Science in Dentistry
• /
• v.42 no.2
• /
• pp.83-88
• /
• 2012

Purpose : The aim of this study was to investigate the initial effects of maxillary expansion therapy with Hyrax appliance and to evaluate the related changes in maxillary sinus volume. Materials and Methods : Thirty patients (20 females, 10 males; 13.8 years) requiring maxillary expansion therapy, as part of their comprehensive orthodontic treatment, were examined. Each patient had cone-beam computed tomography (CBCT) images taken before (T1) and after (T2) maxillary expansion therapy with a banded Hyrax appliance. Multiplanar slices were used to measure linear dimensions and palatal vault angle. Volumetric analysis was used to measure maxillary sinus volumes. Student t tests were used to compare the pre- and post-treatment measurements. Additionally, differences between two age groups were compared with Mann-Whitney U test. The level of significance was set at p=0.05. Results : Comparison of pre-treatment to post-treatment variables revealed significant changes in the transverse dimension related to both maxillary skeletal and dental structures and palatal vault angle, resulting in a widened palatal vault (p<0.05). Hard palate showed no significant movement in the vertical and anteroposterior planes. Nasal cavity width increased on a mean value of 0.93mm(SD=0.23, p<0.05). Maxillary sinus volume remained virtually stable. No significant age differences were observed in the sample. Conclusion : Hyrax expansion therapy did not have a significant impact on maxillary sinus volume.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• v.35 no.3
• /
• pp.182-186
• /
• 2009

There are several oral lesions related with AIDS, such as candidiasis, hairy leukoplakia, Kaposi's sarcoma, aphthous stomatitis, lichen planus, and other opportunistic infectious diseases. Among the others, Kaposi's sarcoma, the most common malignant tumor associated with AIDS, is closely linked to the number of CD4+ T cell. Kaposi's sarcoma often occurs in palate, the most prone site, and has characteristic clinical features in most cases. Sometimes, the tumor induces underlying bone destruction at late stage. We report a case of a 27 year-old man with AIDS-associated Kaposi's sarcoma at left lower retromolar triangle, parapharyngeal area and discuss the management of AIDS patients in dentistry.

• The Journal of Korean Academy of Prosthodontics
• /
• v.44 no.4
• /
• pp.477-487
• /
• 2006

Purpose : this study was to evaluate the fitness of adjustable dental impression trays on the Koreans : the trays used in the previous study by Kim et al. as part of the dental adjustable tray development project were improved and modified. Material and method: The patterns of tray were made through CAD-CAM process, and a simple silicone-base molds were made from them. The trial products were reproduced by pouring polyurethane into these molds. 30 male students(Wonkwang University, Dental College) and 30 female students (Wonkwang Health Science College, Department of Dental Hygiene) were selected and Reversible hydrocolloid impression materials were used for this study. The fitness of the trays was evaluated by measuring the width and length of impression materials of each measurement sites. Results and conclusion : 1. In adapting the trays inside the mouth, a uniform width of impression material(3 $\sim$ 6mm) was obtained in most sites due to the tooth stops and the inclined planes accommodating the width of the tray 2. The thickness of impression material in the central part of the palate was a mean 9.8mm, which turned out to be somewhat thick. 3. In the mandible. the thickness of the impression material in the lingual side inferior to the contact point of the 1st and 2nd molars was 2.7mm, and the thickness of the material in the lingual side of the rearmost margin was 2.5 mm. The thickness of the impression material of these areas was relatively thin.