http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
The effect of acid-etch procedure on the bond between composite resin and mineral trioxide aggregate
이석련,서민석,황수정,문영미 대한치과재료학회 2014 대한치과재료학회지 Vol.41 No.1
This study measured the contact angles of mineral trioxide aggregate (MTA) and the shear bond strengths of composite resin to MTA with and without acid-etch procedures. Methods: twenty-seven MTA specimens were prepared. The contact angles were measured using 7 specimens before and after acid-etch procedure. The remaining 20 specimens were divided into 2 groups, each with 10 specimens. Acid-etch procedure was done on etched group and not on non-etched group. Then, Scotchbond Multipurpose (3M ESPE, St Paul, MN, USA) was applied and composite resin was built. Shear bond strengths were measured using universal testing machine, and the data were subjected to Mann-Whitney U test. Results: After acid-etching procedure, the average contact angle was significantly lower than that of unetched MTA surface (p<0.05). MTA Specimens with acid-etch procedure showed a significantly higher bond strength than that without acid-etch procedure (p<0.05). Conclusions: Acid-etch procedure improved the wettability of MTA surface and the bond strength between MTA and composite resin.
The effect of acid-etch procedure on the bond between composite resin and mineral trioxide aggregate
Seok-Ryun Lee(이석련),Young-Mi Moon(문영미),Soo-Jeong Hwang(황수정),Min-Seock Seo(서민석) 대한치과재료학회 2014 대한치과재료학회지 Vol.41 No.1
Introduction: This study measured the contact angles of mineral trioxide aggregate (MTA) and the shear bond strengths of composite resin to MTA with and without acid-etch procedures. Methods: twenty-seven MTA specimens were prepared. The contact angles were measured using 7 specimens before and after acid-etch procedure. The remaining 20 specimens were divided into 2 groups, each with 10 specimens. Acid-etch procedure was done on etched group and not on non-etched group. Then, Scotchbond Multipurpose (3M ESPE, St Paul, MN, USA) was applied and composite resin was built. Shear bond strengths were measured using universal testing machine, and the data were subjected to Mann-Whitney U test. Results: After acid-etching procedure, the average contact angle was significantly lower than that of unetched MTA surface (p<0.05). MTA Specimens with acid-etch procedure showed a significantly higher bond strength than that without acid-etch procedure (p<0.05). Conclusions: Acid-etch procedure improved the wettability of MTA surface and the bond strength between MTA and composite resin.
ROOT CANAL TREATMENT OF A MANDIBULAR SECOND PREMOLAR WITH THREE SEPARATE ROOT CANALS
Lee, Seok-Ryun,Shin, Seol-Hee,Hong, Sung-Ok,Song, Chang-Kyu,Chang, Hoon-Sang,Min, Kyung-San 大韓齒科保存學會 2010 Restorative Dentistry & Endodontics Vol.35 No.4
Mandibular premolars show a wide variety of root canal anatomy. Especially, the occurrence of three canals with three separate foramina in mandibular second premolars is very rare. This case report describes the root canal treatment of an unusual morphological configuration of the root canal system and supplements previous reports of the existence of such configuration in mandibular second premolar. 하악소구치의 근관형태는 매우 다양하다. 특히, 근단공까지 분리주행하는 세 개의 근관을 갖는 하악 제 2소구치 는 매우 드물다. 본 증례는 하악 제 2소구치의 드문 근관형태를 기술하고, 상기 치아들에서 본 증례와 같이 세 개의 근관이 존재한다는 이전의 연구들을 뒷받침하고 있다.
감염 조절용 차단막의 두께가 광중합기의 중합광에 미치는 영향
장훈상,이석련,홍성옥,류현욱,송창규,민경산 大韓齒科保存學會 2010 Restorative Dentistry & Endodontics Vol.35 No.5
연구목적: 본 연구는 감염 조절용 차단막을 여러 겹으로 사용했을 때 광중합기의 광강도와 파장, light diffusion 등에 미치는 영향에 대해 조사하였다. 연구 재료 및 방법: 감염 조절용 차단막은 투명 랩 (크린랩)을 사용하였고 광중합기는 할로겐 광중합기 (Optilux 360)와 LED 광중합기 (Elipar FreeLight 2)를 사용하였다. 차단막을 1겹, 2겹, 4겹, 8겹으로 광중합기의 광섬유말단을 감싸고 휴대용 광강도 측정기 (Cure Rite)로 광중합기의 광강도를 측정하였다. 광중합기를 주문제작한 optical breadboard에 고정시킨 후 휴대용 spectroradiometer (CS-1000)를 이용하여 광중합기의 파장을 측정하였고, DSLR (Nikon D70s)을 이용하여 광중합기의 light diffusion을 사진 촬영하였다. 결과: 광강도 측정 결과는 차단막의 두께가 증가할수록 광강도가 유의하게 감소하였으나 할로겐 광중합기에서 1겹과 2겹 사이에는 유의차가 없었으며, 4겹 이상의 차단막을 투과할 때 광강도가 더 많이 감소하였다. 여러 겹의 차단막을 투과한 광중합기의 전체적인 파장 형태와 peak wavelength의 변화는 관찰되지 않았다. Light diffusion 사진 촬영 시, LED 광중합기에서는 차단막의 두께가 미치는 영향이 없었으나 할로겐 광중합기에서는 차단막을 4겹 사용했을 때부터 중합광이 조사되는 각도가 감소하기 시작하여 8겹 사용했을 때 통계적으로 유의하게 감소하는 것을 볼 수 있었다 (p < 0.05). 결론: 광중합형 복합레진을 광중합할 경우 감염 조절용 차단막이 찢어지는 경우를 대비하여 1겹으로 사용하기 보다는 2겹으로 사용하는 것이 환자간의 교차감염을 예방하는데 유리할 것으로 사료된다. Objectives: This study investigated the effect of infection control barrier thickness on power density, wavelength, and light diffusion of light curing units. Materials and Methods: Infection control barrier (Cleanwrap) in one-fold, two-fold, four-fold, and eightfold, and a halogen light curing unit (Optilux 360) and a light emitting diode (LED) light curing unit (Elipar FreeLight 2) were used in this study. Power density of light curing units with infection control barriers covering the fiberoptic bundle was measured with a hand held dental radiometer (Cure Rite). Wavelength of light curing units fixed on a custom made optical breadboard was measured with a portable spectroradiometer (CS-1000). Light diffusion of light curing units was photographed with DSLR (Nikon D70s) as above. Results: Power density decreased significantly as the layer thickness of the infection control barrier increased, except the one-fold and two-fold in halogen light curing unit. Especially, when the barrier was four-fold and more in the halogen light curing unit, the decrease of power density was more prominent. The wavelength of light curing units was not affected by the barriers and almost no change was detected in the peak wavelength. Light diffusion of LED light curing unit was not affected by barriers, however, halogen light curing unit showed decrease in light diffusion angle when the barrier was four-fold and statistically different decrease when the barrier was eight-fold (p < 0.05). Conclusions: It could be assumed that the infection control barriers should be used as two-fold rather than one-fold to prevent tearing of the barriers and subsequent cross contamination between the patients.
상악골 Le Fort I 골절 환자에서 경구 기관 내 삽관 하에서의 악간고정 및 정복: 증례보고
최은주,이석련,Choi, Eun-Joo,Lee, Seok-Ryun 대한치과마취과학회 2014 Journal of Dental Anesthesia and Pain Medicine Vol.14 No.4
In order to reduce jaw fracture accompanied by basal skull or nasal fracture, submental intubation could be generally performed. Albeit submental intubation has been widely accepted, it could develop complications such as nerve injury, glandular duct injury, and orocutaneous fistula. Here, we suggest oral intubation for overcoming complications and providing more stable surgical environment in emergency case. Under oral intubation maintaining in retromolar triangle and buccal corridor space, intermaxillary fixation was successfully underwent in 38-years-old female patient with Le Fort I fracture accompanied by pneumocephalus.
Healing after horizontal root fractures: 3 cases with 2-year follow-up
최유리나,홍성옥,이석련,민경산,박수정 대한치과보존학회 2014 Restorative Dentistry & Endodontics Vol.39 No.2
Among dental traumas, horizontal root fractures are relatively uncommon injuries. Proper initial management and periodical evaluation is essential for the successful treatment of a root-fractured tooth. If pulpal necrosis develops, endodontic treatment is indicated, exclusively for the coronal fragment. Fragment diastases exert a great influence on healing at the fracture line and on pulpal necrosis. An adequately treated root-fractured tooth has a good prognosis. This case report describes the treatment and 2-yr follow up of 3 maxillary central incisors, first with horizontal root fracture, second with horizontal root fracture and avulsion, and third with horizontal root fracture and lateral luxation. All three cases were treated with mineral trioxide aggregate (ProRoot, Dentsply). During 2 yr of follow-up evaluation, the root-fractured teeth of the present patients were well retained in the arch, showing periodontal healing, even after endodontic treatment.
완전 무치악에서 즉시 부하시와 표준 부하시 임플란트 생존율에 대한 비교 분석
서현수(Hyun-Soo Seo),박준우(Jun-Woo Park),홍순민(Soon-Min Hong),이석련(Seok-Ryun Lee) 대한치과의사협회 2014 대한치과의사협회지 Vol.52 No.12
Introduction: This study researched the clinical application of immediate functional loading technique about implant survival rate in the completely edentulous and suggested our protocol about surgical & prosthetic procedure. Materials and methods: 32 consecutive patients participated in this study. A total of 242 implants were inserted. In test group, 144 implants were inserted in 19 patients with immediate functional loading with occlusal contact. In control group, 98 implants were inserted in 13 patients and conventional loading was done after 4~6 months. Result: In the immediately loaded implants group, overall cumulative survival rate was 98.6%.
치아우식 고위험군 환자에서 우식위험평가를 활용한 치아우식증 관리
이동현(Dong-Hyun Lee),홍성옥(Sung-Ok Hong),이석련(Seok-Ryun Lee) 대한치과재료학회 2016 대한치과재료학회지 Vol.43 No.3
Dental caries is a multifactorial, transmissible, infectious oral disease caused primarily by the complex interaction of cariogenic oral flora with fermentable dietary carbohydrates on the tooth surface over time. At the tooth surface and sub-surface level, dental caries results from a dynamic process of attack (demineralization) and restitution (remineralization) of the tooth matter. These events are modulated by many factors, including number and type of microbial flora, diet, oral hygiene, salivary flow and buffering capacity, and resistance of the tooth structure and composition to caries. Times has proven that dental caries cannot be controlled by restorations alone. Understanding the balance between demineralization and remineralization is key to caries management. Therefore management of caries as a disease entity is the ability to individualize caries diagnosis and treatment for each patient. Assessment of the caries risk of the individual patient is a critical component in determining and appropriate abd successful management strategy. The use of specific products about remineralization and antibacterial modalities is essential to control the disease and improve the oral health of high-risk individuals. This case report describes managing caries for a patient who has high caries risk and improving his oral self-care.