Correction of Bilateral Tessier No. 2, 3, and 12 Facial Cleft with Anopthalmia

Correction of Post-traumatic Lower Lip Asymmetry Using Botulinum Toxin Type A

Surgical Management of Bisphosphonate Related Osteonecrosis of the Jaw Using Pedicled Buccal Fat Pad Flap

3-Dimensional Micro-Computed Tomography Study on Bone Regeneration with Silk Fibroin, rh-Bone Morphogenetic Protein Loaded-Silk Fibroin and Tricalcium Phosphate Coated-Silk Fibroin in Rat Calvaria Defect

Silk Fibroin and Substance P Combination Graft for the Reconstruction of a Bone Defect

The Effect of Bone Marrow-Derived Osteoblasts on Mandibular Deffect in Rabbit

Botryoid Odontogenic Cyst on Mandibular Anterior and Both Body Area: a Case Report

Assessment of antero-posterior skeletal relationships in adult Korean patients in the natural head position and centric relation / 대한치과교정학회지

OBJECTIVE: This study aimed to verify the intra-individual reproducibility of the natural head position (NHP) in adult Korean patients in the centric relation (CR) position and to prove the inter-individual variability of the Frankfurt horizontal (FH) plane and sella-nasion (SN) line compared to the true horizontal line (THL). In addition, the study aimed to investigate the correlations between linear measurements from A-point and B-point to the nasion true vertical line (NTVL) and angular measurements from A-point and B-point to the SN line. METHODS: Two lateral cephalograms were taken of 116 subjects (23 males, 93 females) with CR wax bites in a NHP at a one-week interval. RESULTS: Method errors of three variables and intraclass correlation coefficients of six parameters proved the intra-individual reproducibility of NHP (p 0.05), but it was clinically variable (SD 3.89degrees) on the inter-individual level. Conversely, the angle of the SN line to the THL was significantly different from 7degrees (p < 0.05). Very low correlation was found between the linear measurements and angular measurements of A-point and B-point (p < 0.01). CONCLUSIONS: The NTVL could be a useful reference line for assessing the antero-posterior position of the maxilla and mandibleof Korean adult patients in NHP and CR.

The effect of silk fibroin and rhBMP-2 on bone regeneration in rat calvarial defect model

INTRODUCTION: This study evaluated the capability of silk fibroin (SF) and recombinant human bone morphogenetic protein-2 loaded SF (SF-BMP) as a bone defect replacement matrix when grafted in a calvarial bone defect of rats in vivo. MATERIALS AND METHODS: A total 70 calvarial critical size defects (5.0 mm in diameter) made on 35 adult female Sprague-Dawley rats were used in this study. The defects were transplanted with (1) rhBMP-2 loaded silk fibroin graft (SF-BMP: 0.8+10 microg), (2) Silk fibroin (SF: 10 microg), and (3) no graft material (Raw). The samples were evaluated with soft x-rays, alkaline phosphatase activity, calcium/phosphate quantification, histological and histomorphometric analysis at postoperative 4 and 8 weeks. RESULTS: The SF-BMP group (48.86+/-14.92%) had a significantly higher mean percentage bone area than the SF group (24.96+/-11.01%) at postoperative 4 weeks.(P<0.05) In addition, the SF-BMP group (40.01+/-12.43%) had a higher % bone area at postoperative 8 weeks than the SF group (33.26+/-5.15%). The mean ratio of gray scale levels to the host bone showed that the SF-BMP group (0.67+/-0.08) had a higher mean ratio level than the SF group (0.61+/-0.09) at postoperative 8 weeks. These differences were not statistically significant.(P=0.168 and P=0.243, respectively) CONCLUSION: The rhBMP-2 loaded silk fibroin graft revealed fewer immunoreactions and inflammation as well as more new bone formation than the pure silk fibroin graft. Therefore, silk fibroin may be a candidate scaffold for tissue engineered bone regeneration.

Isolation of Early Neurogenesis Genes with Xenopus cDNA Microarray / 한국실험동물학회지

Neurogenesis is the process that develops neuroectoderm from ectoderm. Bone morphogenetic protein (BMP) inhibition in ectodermal cells is necessary and sufficient for neurogenesis in Xenopus embryos. To isolate genes involved in early neurogenesis, Xenous Affymetrix gene chips representing 14,400 genes were analyzed in early stage of neuroectodermal cells that were produced by inhibition of BMP signaling with overexpression of a dominant-negative receptor. We identified 265 candidate genes including 107 ESTs which were newly expressed during the early neurogenesis by blocking BMP signaling. The candidates of 10 ESTs were selected and examined for upregulation in neuroectoderm. Five EST genes were confirmed to be upregulated in neuroectoderm and examined for time-dependent expression patterns in intact embryos. Two EST genes were cloned and identified as a homology of CYP26c (Xl.1946.1.A1_at) and Kielin containing VWC domain (Xl.15853.1.A1_at). One of them, CYP26c, was further characterized for its transcriptional regulation and role of anterior-posterior patterning during neurogenesis. Taken together, we analyzed and characterized genes expressed in early neurogenesis. The results suggest that neurogenesis by inhibition of BMP provides useful system to isolate genes involved in early events of neurogenesis during early vertebrate embryogenesis.

Case Report of Treatment of Multiple Odontogenic Keratocysts with Basal Cell Nevus Syndrome Using Preoperative Marsupialization andOrthodontic Extrusion

Preliminary study on "ridge splitting technique in horizontally deficient alveolar ridge"

AIDS-associated Kaposi 's sarcoma on left lower retromolar triangle and parapharyngeal area : A case report

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.

Effect of platelet-rich plasma on autogenous bone graft for bone formation in rabbit

Current and Future Foodservice Management Performance in Child-care Centers

This study examined foodservice management performance in child-care centers and suggests ways in which meal service quality can be improved. Questionnaires were distributed to 51 child-care facilities. The majority of respondents were facility directors (dietitians) and their facility type was tax-paid (92.2%). The dietitian response rate was 51.0%, and the majority (96.2%) were hired with co-management status, visiting a facility once a week (76.0%). Only 52.1% of the facilities had menu planning by a dietitian, and improvements were needed in terms of planning menus with standardized recipes, especially for infant meals. The monthly food cost per child was 47,394 won, and the labor cost for a co-management dietitian was 3,670 won per child, indicating 21.8% and 1.8% of the tuition fee, respectively. Other necessary improvements included: more reliable food purchasing management, securing additional foodservice equipment, and better sanitation management. In addition, respondents rated the following as requirements to ensure high quality meal service: 'modernized foodservice equipment and facilities', 'government financial support', and 'information on nutrition and foodservice management provided by dietitians'. Based on the study results, the following are recommendations for improving meal service quality in child-care centers: Dietitian placement should be extended to facilities of over 50-capacity in addition to their current placement in facilities of over 100-capacity, and co-management dietitians should have their control span restricted to two facilities instead of five. Finally, nationwide nutrition support plans and nutrition education programs should be developed and implemented by dietitians, and their roles should be extended to foodservice mangers as well as nutrition teachers.

Effect of Platelet-Rich Plasma on Osteogenesis of Marrow-derived Osteoblasts in the Mandible of Rabbit: Histomorphometric Analysis

Preliminary study on the effect of inflamed TMJ synovial fluid on the intracellular calcium concentration and differential expression of iNOS and COX-2 in human immortalized chondrocyte C28/I2

OBJECTIVE: The objective of this study was to examine the hypothesis that inflammatory synovial fluid from TMJ internal derangement initiates a transient increase in intracellular calcium concentration ([Ca2+]i) in chondrocytes and the induced Ca2+ signaling affects iNOS/COX-2 gene expression patterns following exposure to inflamed synovial fluid. MATERIALS AND METHODS: Two female adult patients with symptoms of TMD who agreed to participate in the study were selected for this study. Immortalized human juvenile costal chondrocyte C-28/I2 was grown to 80% confluency and synovial fluids from two patients were added respectively to culture media for 24 hours at the concentration of 100ng/10ml. Confocal laser scanning microscope (CLSM) was used to examine changes of intracellular calcium concentration ([Ca2+]i). RT-PCR was performed to identify the expression profile of IL-1alpha, iNOS, COX-2. RESULTS: Increased [Ca2+]i was observed in chondrocytes subjected to inflamed synovial fluid compared to control cultures and in respective cultures exposed to inflamed synovial fluids from each patient, IL-1beta, COX-2 mRNA were detected. However, in neither case iNOS mRNA was expressed. IL-1alpha, COX-2, and iNOS mRNA were expressed in control culture. CONCLUSION: Our results show that immortalized chondrocytes cultured with inflamed synovial fluids from patients diagnosed as disc displacement without reduction and limitation in mouth opening showed increased calcium concentration and expression of COX-2 while inhibiting the production of iNOS, which in turn could adversely affect the chondrocytes in at least short term by hindering physiologic role of NO against inflammatory cascades. These findings suggest that inflamed synovial fluid may differentially regulate the transcriptomes of relevant inflammatory mediators, especially iNOS/COX-2 axis in chondrocytes through adjusting calcium transients.

The cDNA microarray study for the effect of FGF-5 administration on fibroblast

Pleomorphic adenoma in accessory salivary gland: A case report

Assessment of the Child Care Centers' Foodservice Facility and Development of the Kitchen Facility Model based on the General Sanitation Standards and Guidelines

The purposes of this study were to assess the child care centers' foodservice facility, and to develop the kitchen facility model based on the general sanitation standards and guidelines in order to provide basic information for a plan review to build or renovate child care centers' foodservice facility. The scopes of the study include : 1) field assessment of the foodservice management practices and facilities in 8 public child care centers, and 2 private child care centers which they are subsidized from the government as public child care centers, 2) development of child care centers' kitchen facility model based on the General Sanitation Standards and Guidelines. The results of this study can be summarized as follows : 1. Field Assessment of the Child Care Centers' Foodservice Facility Average number of children in child care centers was 78.0+/-24.20, the average space of kitchen was 15.13+/-4.25(m2). Especially, the average space of kitchen was 18.49+/-4.35(m2) with enrollment capacity of 90~120 children in child care centers. The inventory level of most foods was relatively low except rice and kimchi. Kitchen facilities and equipments were similar to those of home kitchen and did not meet the standards of institutional practice. Therefore, the director in child care centers should recognize the importance of the sanitation management and pay more attention to the renovation of foodservice facilities as well as sanitation management practices. 2. Development of the Kitchen Facility Model based on the General Sanitation Standards and Guidelines The kitchen facility plan model with enrollment capacity of 100 children was developed based on the results of field assessment and literature review. Suggested kitchen space was 34.16m2(6,100mmx5,600mm). This space was bigger than the results of field survey or precedent study, considered appropriate to implement the general sanitation standards. The main feature of the developed kitchen facility plan and model was product flow in one direction from the arrival of the raw material to the finished product in order to prevent cross contamination and to improve working efficiency.