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RISS 인기검색어
- 검색키워드
- 저자 : Otgonbayar Unursaikhan (검색결과 4 건)
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Comparative evaluation of roughness of titanium surfaces treated by different hygiene instruments
Otgonbayar Unursaikhan,이중석,차재국,박정철,정의원,김창성,조규성,최성호 대한치주과학회 2012 Journal of Periodontal & Implant Science Vol.42 No.3
Purpose: The use of appropriate instruments to clean surfaces with minimal change, is critical for the successful maintenance of a dental implant. However, there is no consensus about the type and methodology for such instruments. The aim of this study was to characterize changes in the roughness of titanium surfaces treated by various scaling instruments. Methods: Thirty-seven identical disks (5 mm in diameter) were investigated in this study. The specimens were divided into eight groups according to the types of instrumentation and the angle of application. Ultrasonic scaling systems were applied on a titanium disk to simulate standard clinical conditions. The equipment included a piezoelectric ultrasonic scaler with a newly developed metallic tip (NS group), a piezoelectric ultrasonic scaler with a conventional tip (CS group), a piezoelectric root planer ultrasonic scaler with a conventional tip (PR group), and a plastic hand curette (PH group). In addition, the sites treated using piezoelectric ultrasonic scaler systems were divided two sub-groups: 15 and 45 degrees. The treated titanium surfaces were observed by scanning electron microscopy (SEM), and the average surface roughness (Ra) and mean roughness profile depth (Rz) were measured with a profilometer. Results: SEM no significant changes in the titanium surfaces in the NS group, regardless of the angle of application. The PH group also showed no marked changes to the titanium surface, although some smoothening was observed. All CS and PR sites lost their original texture and showed irregular surfaces in SEM analysis. The profilometer analysis demonstrated that the roughness values (Ra and Rz) of the titanium surfaces increased in all, except the PH and NS groups, which showed roughness decreases relative to the untreated control group. The Ra value differed significantly between the NS and PR groups (P<0.05). Conclusions: The results of this study indicated that changes in or damage to titanium surfaces might be more affected by the hardness of the scaler tip than by the application method. Within the limitations of this study, the newly developed metallic scaler tip might be especially suitable for peri-implant surface decontamination, due to its limited effects on the titanium surface.
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Comparative evaluation of roughness of titanium surfaces treated by different hygiene instruments
Unursaikhan, Otgonbayar,Lee, Jung-Seok,Cha, Jae-Kook,Park, Jung-Chul,Jung, Ui-Won,Kim, Chang-Sung,Cho, Kyoo-Sung,Choi, Seong-Ho Korean Academy of Periodontology 2012 Journal of Periodontal & Implant Science Vol.42 No.3
Purpose: The use of appropriate instruments to clean surfaces with minimal change, is critical for the successful maintenance of a dental implant. However, there is no consensus about the type and methodology for such instruments. The aim of this study was to characterize changes in the roughness of titanium surfaces treated by various scaling instruments. Methods: Thirty-seven identical disks (5 mm in diameter) were investigated in this study. The specimens were divided into eight groups according to the types of instrumentation and the angle of application. Ultrasonic scaling systems were applied on a titanium disk to simulate standard clinical conditions. The equipment included a piezoelectric ultrasonic scaler with a newly developed metallic tip (NS group), a piezoelectric ultrasonic scaler with a conventional tip (CS group), a piezoelectric root planer ultrasonic scaler with a conventional tip (PR group), and a plastic hand curette (PH group). In addition, the sites treated using piezoelectric ultrasonic scaler systems were divided two sub-groups: 15 and 45 degrees. The treated titanium surfaces were observed by scanning electron microscopy (SEM), and the average surface roughness (Ra) and mean roughness profile depth (Rz) were measured with a profilometer. Results: SEM no significant changes in the titanium surfaces in the NS group, regardless of the angle of application. The PH group also showed no marked changes to the titanium surface, although some smoothening was observed. All CS and PR sites lost their original texture and showed irregular surfaces in SEM analysis. The profilometer analysis demonstrated that the roughness values (Ra and Rz) of the titanium surfaces increased in all, except the PH and NS groups, which showed roughness decreases relative to the untreated control group. The Ra value differed significantly between the NS and PR groups (P<0.05). Conclusions: The results of this study indicated that changes in or damage to titanium surfaces might be more affected by the hardness of the scaler tip than by the application method. Within the limitations of this study, the newly developed metallic scaler tip might be especially suitable for peri-implant surface decontamination, due to its limited effects on the titanium surface.
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토끼 두개골 모델에서 탈회동종골, 탈회우골, 및 합성 Hydroxyapatite의 골재생 비교연구
Ming-Lan Zhang,Otgonbayar Unursaikhan,양혜주,이중석,정의원,김창성,최성호 한국생체재료학회 2012 생체재료학회지 Vol.16 No.4
The purpose of this study was to compare bone regenerative effects of allograft, xenograft, and alloplast bone substitutes in rabbit calvarial defects. 14 male New Zealand rabbits were used. Four defects with a diameter of 8 mm were created on each animal. Demineralized bone matrix (DBM) gel, bovine bone (BB) and hydroxyapatite (HA) were used as the three test groups, while the control group was left unfilled. The animals were sacrificed after 2 and 8 weeks of healing. All experimental groups at 8 weeks showed statistically significant differences in new bone formation compared 2 weeks. Residual biomaterials in sites received DBM gel decreased compared to the sites received BB and HA. Within the limits of this study, there were no significant differences in bone regeneration between the sites received DBM gel, BB, and HA.
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토끼 두개골 결손부에서 가교화된 제 1형 콜라겐 차폐막의 초기 골형성 효과
이은웅,양혜주,황지완,Otgonbayar Unursaikhan,정은주,이중석,정의원,김창성,조규성,최성호 한국생체재료학회 2012 생체재료학회지 Vol.16 No.3
The aim of this study was to evaluate early healing processes in guided bone regeneration using a cross-linked type-I collagen membrane of 1-ethyl-3-(3- dimethyl aminopropyl) carbodiimide (EDC) at rabbit calvarial defects. Eight male New Zealand rabbits were used and four circular calvarial defects were created. Each of the four defects was filled with different graft materials: 1) collagen membrane, 2) biphasic calcium phosphate, 3) collagen membrane with biphasic calcium phosphate, and 4) nothing as control. The animals were sacrificed following two and four weeks of healing periods. Between two healing periods, collagen membrane was resorbed 28.5% and maintained its original shape and marginal integrity. The collagen membrane group resulted in significantly better defect closure compared to control group (p < 0.05). The augmented area was significantly higher in bone graft material applied groups (p < 0.05). There was no statistical difference in new bone formation between all groups at all healing periods, but vascularization was seemed to be promoted and more new bone formation was observed in superficial layer in collagen membrane applied groups. Within the limits of this study, the cross linked collagen membrane maintained its structural integrity and promoted bone regeneration especially in superficial layer.
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