Objectives: The study aims to investigate the influence of oral health service experience on oral health behavior of North Korean defectors and contribute to the development and implementation of oral health education among this population. Methods: A self-reporting questionnaire survey was conducted with 161 North Korean defectors in Hanawon from April, 2015 to September, 2015. Of these participants, 50 were excluded owing to insufficient questionnaire data. The questionnaire was developed based on the WHO’s Oral Health Survey (OHS) and the Korean National Oral Health Survey (KNOHS). Three categories were included in the questionnaire: demographic characteristics, dental service experience in North Korea, and oral health behavior. Results: Males had higher levels of perceived oral health compared to females, with differences according to the region they are from in North Korea. Those who received tooth brushing instruction in North Korea showed a greater tendency to practice tooth brushing after lunch, while those who received oral health examination showed a higher level of use of oral rinses. Further, the experience of dental scaling significantly influenced both practicing tooth brushing after lunch and use of oral rinses. Conclusions This study confirmed that the previous experience of oral health service in North Korea positively influenced current oral health behavior of North Korean defectors. Continued oral health education can enhance their oral health behavior, oral health, and quality of life. Thus, it is suggested that policies and oral health education should be developed according to their characteristics and oral health service experience in North Korea.

The calcaneal insufficiency avulsion fracture usually occurs in an area of fused apophysis in adults without significant history of trauma or overuse activities. It is an uncommon injury which has been described in patients with complicated diabetes, Charcot neuroarthropathy, amyloidosis with neuropathy, severe osteoporosis, and other conditions. Discussion of the issue of fracture location is still not sufficient. We report on a case of a 50-year-old male who experienced a non-traumatic diabetic calcaneal insufficiency fracture. Intraoperatively, a biopsy specimen was obtained from the exposed fracture site for histological study. We assume that the calcaneal fused apophyseal line is the weak point of failure due to various incomplete mixtures of trabecular bone, woven bone, and cartilaginous tissues, and may fail when repeated tensile stress is imposed.
Adult ; Amyloidosis ; Biopsy ; Calcaneus ; Diabetes Mellitus ; Fractures, Stress ; Humans ; Male ; Middle Aged ; Osteoporosis

Human umbilical cord blood mesenchymal stem cells (hUCB-MSCs) are used in tissue repair and regeneration; however, the mechanisms involved are not well understood. We investigated the hair growth-promoting effects of hUCB-MSCs treatment to determine whether hUCB-MSCs enhance the promotion of hair growth. Furthermore, we attempted to identify the factors responsible for hair growth. The effects of hUCB-MSCs on hair growth were investigated in vivo, and hUCB-MSCs advanced anagen onset and hair follicle neogeneration. We found that hUCB-MSCs co-culture increased the viability and up-regulated hair induction-related proteins of human dermal papilla cells (hDPCs) in vitro. A growth factor antibody array revealed that secretory factors from hUCB-MSCs are related to hair growth. Insulin-like growth factor binding protein-1 (IGFBP-1) and vascular endothelial growth factor (VEGF) were increased in co-culture medium. Finally, we found that IGFBP-1, through the co-localization of an IGF-1 and IGFBP-1, had positive effects on cell viability; VEGF secretion; expression of alkaline phosphatase (ALP), CD133, and β-catenin; and formation of hDPCs 3D spheroids. Taken together, these data suggest that hUCB-MSCs promote hair growth via a paracrine mechanism.
Alkaline Phosphatase ; Alopecia ; Cell Survival ; Coculture Techniques ; Fetal Blood* ; Hair Follicle ; Hair* ; Humans* ; In Vitro Techniques ; Insulin-Like Growth Factor Binding Protein 1 ; Insulin-Like Growth Factor I ; Intercellular Signaling Peptides and Proteins* ; Mesenchymal Stromal Cells ; Regeneration ; Stem Cells* ; Umbilical Cord* ; Vascular Endothelial Growth Factor A