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The influence of diabetes mellitus on periodontal tissues: a pilot study
Um, Yoo-Jung,Jung, Ui-Won,Kim, Chang-Sung,Bak, Eun-Jung,Cha, Jeong-Heon,Yoo, Yun-Jung,Choi, Seong-Ho Korean Academy of Periodontology 2010 Journal of Periodontal & Implant Science Vol.40 No.2
Purpose: The purpose of this study was to preliminarily evaluate the influence of diabetes mellitus (DM) on periodontal tissue without establishment of periodontitis. Methods: Seven-week-old db/db mice were used for the diabetic experimental group and systematically healthy mice of the same age were used as controls. After 1 week of acclimatization, the animals were sacrificed for hard and soft tissue evaluation. The pattern of bone destruction was evaluated by stereomicroscope evaluation with alizarin red staining and radiographic evaluation by microscopic computerized tomography images. Histological evaluation was performed with hematoxylin and eosin stain for evaluation of soft tissue changes. Results: In both stereomicroscope evaluation and radiograph image analysis, aggressive form of bone destruction was observed in diabetic animals when compared to the systematically healthy controls. In histological evaluation, apical migration of junctional epithelium with slight inflammatory cell infiltration was observed with disarrangement of connective tissue fibers. Conclusions: Within the limits of this study, diabetic animals presented distortion in periodontal attachment and an aggressive bone loss pattern when compared to the healthy controls, suggesting that DM has an independent effect on periodontal tissue destruction irrespective of the presence or absence of periodontal disease.
( Yoo Jung Um ),( Koo Sung Cho ),( Chang Sung Kim ) 한국조직공학·재생의학회 2009 조직공학과 재생의학 Vol.6 No.1
Periodontal disease results in destruction of periodontal tissues(cementum, alveolar bone and periodontal ligament) which may ultimately lead to tooth loss. To date, there is no ideal treatment approach in achieving optimal periodontal tissue regeneration. Recruitment of progenitor cells to the site which could differentiate into cementoblasts, osteoblasts and periodontal ligament-forming cells are needed and recently, using pluripotent stem cells isolated from various tissues in conjugation with growth and differentiation factors have been presented to lead periodontal tissue regeneration. This study evaluated the effect of E coli expressed recombinant human bone morphogenetic protein-2(ErhBMP-2) to periodontal ligament stem cells(PDLSCs) and bone marrow stem cells(BMSCs) on periodontal tissue regeneration. rhBMP-2 those expressed from E coli was treated on ex-vivo expanded human BMSCs and PDLSCs to evaluate its regenerative effect in vivo and in vitro. Cementum, PDL-like tissues and bone were regenerated in transplanting PDLSCs and BMSCs, respectively. There was enhanced tissue regeneration when ErhBMP-2 was treated to PDLSCs, but not with BMSCs. Similar results were observed with in vitro experiments. Though further studies are needed, the results suggest a possible treatment approach in combining ErhBMP-2 and PDLSCs for periodontal tissues regeneration.
Human immunodeficiency virus 감염과 치주 질환의 상관관계, 진단 및 처치에 관한 문헌 고찰
박정철(Jung-Chul Park),엄유정(Yoo-Jung Um),정의원(Ui-Won Jung),김창성(Chang-Sung Kim),조규성(Kyoo-Sung Cho),채중규(Jung-Kiu Chai),김종관(Chong-Kwan Kim),최성호(Seong-Ho Choi) 대한치과의사협회 2009 대한치과의사협회지 Vol.47 No.8
Purpose: Infection with HIV-1 virus has become a critical worldwide public health problem. The oral complications of HIV infection with its progression of Impairment of the host response to combat infection present unique challenges to the periodontists. Material and Methods : Medline research was carried out to find relationship of the progression of HIV infection to the occurrence of oral lesions including the HIV-related periodontal diseases. Results; The linear gingival erythema, necrotizing ulcerative periodontitis, necrotizing ulcerative gingivitis and oral candidiasis are common lesions in HIV-infected individuals. The linear gingival erythema and necrotizing ulcerative periodontitis lesions in HIV-infected subjects were found to have a similar microbiological profile. There are several general considerations in the periodontal management of the HIV-infected patient with or without periodontal disease. The altered immunity and host response in patients with HIV infection may also affect the incidence and severity of other common forms of periodontal disease not associated with HIV infection. Conclusion: Periodontal diseases in HIV-infected individuals present unique challenges in diagnosis, monitoring, treatment and maintenance. Therefore exact HIV staging, geographic location, antiviral and antimicrobial therapies and oral habits should be taken into consideration when treating HIV-infected patients.
Park, Jung-Chul,Um, Yoo-Jung,Jung, Ui-Won,Kim, Chang-Sung,Choi, Seong-Ho,Kim, Chong-Kwan Korean Academy of Periodontology 2010 Journal of Periodontal & Implant Science Vol.40 No.1
Purpose: Periodontal regenerative therapies for defects created by severe periodontitis are mainly focused on bone regeneration. Although cementum regeneration needs to be better understood, it is believed to play an important role in periodontal regeneration. The first step toward a full understanding of cementum regeneration is to compare repaired cementum to pristine cementum. This study, which used histological techniques, was designed to focus on cementum regeneration and to compare pristine cementum to repaired cementum after surgical procedures with 8 and 24 week healing periods in a canine model. Methods: Buccal and lingual mucoperiosteal flaps of 10 beagle dogs were surgically reflected to create critical-sized defects. Intrabony one-wall defects, of which dimension is 4 mm width and 5 mm depth, were made at the distal aspect of mandibular second premolars and the mesial aspect of mandibular fourth premolars in the right and left jaw quadrants. Animals were sacrificed after 8 and 24 weeks post-surgery for histological specimen preparation and histometric analysis. Results: The repaired cementum was composed mostly of acellular cementum and cellular mixed fiber cementum and was thicker in the apical area than in the coronal area. The acellular cementum of the supracrestal area appeared to be amorphous. The newly formed cellular cementum was partially detached from the underlying circumpulpal dentin, which implied a weak attachment between new cementum and dentin, and this split was observed to a lesser extent in the 24 week group than in the 8 week group. The vertical height of the repaired cementum was greater in the 24 week group than in the 8 week group. Conclusions: Within the limitations of this study, we can conclude that repaired cementum after root planing was mainly acellular cementum and cementum tissue that matured to a shape similar to pristine cementum as the healing progressed from 8 to 24 weeks.
치과 진료실에서의 신속 구강 점막 도말 HIV 항체 검사에 대한 태도 및 지식에 관한 연구
박정철(Jung-Chul Park),김용태(Yong-Tae Kim),정임희(Im-Hee Jung),엄유정(Yoo-Jung Um),정의원(Ui-Won Jung),김창성(Chang-Sung Kim),조규성(Kyoo-Sung Cho),채중규(Jung-Kiu Chai),김종관(Chong-Kwan Kim),최성호(Seong-Ho Choi) 대한치과의사협회 2009 대한치과의사협회지 Vol.47 No.5
Purpose: The aim of this study was to evaluate the patient’s and dentist’s perspective and knowledge on rapid human immunodeficiency virus screening test in dental setting. Material and Methods: In March 2009, 100 patients and 100 dentists at College of Dentistry, Yonsei University were provided an attitude assessment survey. Results: Results were analyzed for acceptance of testing and potential barriers. 94% of patients agreed to take a rapid HIV screening test and 77% of dentists were willing to provide the test to their patients. Also the current knowledge state of patients and dentists on HIV infection was not accurate as expected. Conclusion: Overall, dental clinic patients widely accepted the offer of rapid oral HIV screening. Rapid HIV screening test in the dental setting can be an important option to increase the number of individuals who know their HIV status.