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Jeong-Hun Nam,Akram Abdo Almansoori,Oh-Jun Kwon,Young-Kwon Seo,Bongju Kim,Young-Kyun Kim,Jong-Ho Lee,KangMi Pang Korean Academy of Periodontology 2023 Journal of Periodontal & Implant Science Vol.53 No.3
Purpose: This study evaluated the efficacy of a tube-shaped poly(ε) caprolactone - β tricalcium phosphate (PCL-TCP) scaffold with the incorporation of human umbilical cord-derived mesenchymal stem cells (hUCMSCs) and platelet-rich plasma (PRP) for bone regeneration in the procedure of single-stage sinus augmentation and dental implantation in minipigs. Methods: Implants were placed in the bilateral sides of the maxillary sinuses of 5 minipigs and allocated to a PCL-TCP+hUCMSCs+PRP group (n=5), a PCL-TCP+PRP group (n=5), and a PCL-TCP-only group (n=6). After 12 weeks, bone regeneration was evaluated with soft X-rays, micro-computed tomography, fluorescence microscopy, and histomorphometric analysis. Results: Four implants failed (2 each in the PCL-TCP+hUCMSCs+PRP and PCLTCP+hUCMSC groups). An analysis of the grayscale levels and bone-implant contact ratio showed significantly higher mean values in the PCL-TCP+hUCMSCs+PRP than in the PCL-TCP group (P=0.045 and P=0.016, respectively). In fluoromicroscopic images, new bone formation around the outer surfaces of the scaffolds was observed in the PCLTCP+hUCMSCs+PRP group, suggesting a tenting effect of the specially designed scaffolds. Bone regeneration at the scaffold-implant interfaces was observed in all 3 groups. Conclusions: Using a tube-shaped, honeycombed PCL-TCP scaffold with hUCMSCs and PRP may serve to enhance bone formation and dental implants' osseointegration in the procedure of simultaneous sinus lifting and dental implantation.
Per-oral cross-facial sural nerve graft for facial reanimation
Jeong, Joohee,Almansoori, Akram Abdo,Park, Hyun-Soo,Byun, Soo-Hwan,Min, Seung-Ki,Choung, Han-Wool,Park, Joo Yong,Choi, Sung Weon,Kim, Bongju,Kim, Soung-Min,Lee, Jong-Ho Korean Association of Maxillofacial Plastic and Re 2018 Maxillofacial Plastic Reconstructive Surgery Vol.40 No.-
Background: Cross-facial nerve graft is considered the treatment of choice for facial reanimation in patients with unilateral facial palsy caused by central facial nerve damage. In most cases, a traditional parotidectomy skin incision is used to locate the buccal and zygomatic branches of the facial nerve. Methods: In this study, cross-facial nerve graft with the sural nerve was planned for three patients with facial palsy through an intraoral approach. Results: An incision was made on the buccal cheek mucosa, and the dissection was performed to locate the buccal branch of the facial nerve. The parotid papillae and parotid duct were used as anatomic landmarks to locate the buccal branch. Conclusions: The intraoral approach is more advantageous than the conventional extraoral approach because of clear anatomic marker (parotid papilla), invisible postoperative scar, reduced tissue damage from dissection, and reduced operating time.
Kibum Kim,Bongju Jeong 대한산업공학회 2008 대한산업공학회 추계학술대회논문집 Vol.2008 No.11
This research is motivated by two search questions on supply chain. What will be the supply chain value in the future and how can we increase the future supply chain value continually? For answer to these questions, we propose the concept, theory, and framework of sustainable supply chain (SSC). Firstly, we newly define the SSC and its value. SSC is a new paradigm that can generate new supply chain value by managerial innovation to not only maximize the supply chain profitability but also minimize its environmental and social impact. When the corporate sustainable management is popular among the global companies, we explain the reason why the scope of sustainable management should be expanded from companywide to supply chain using some cases. Secondly, we propose the SSC theory, which describes the essentiality of paradigm shift from conventional supply chain (CSC) to SSC. We prove the SSC theory based on the concept of externality and social surplus in welfare economics. Finally, the SSC framework is presented. We depict the SSC framework as SSC house visually and explain that sustainable procurement and sustainable consumption is a necessary and sufficient condition of SSC. Even if there are so many features of supply chain to increase its future competitiveness in the past researches, we assert that SSC can be the right answer to our research questions.