• 대한소아치과학회지
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• 제46권2호
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• pp.127-134
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• 2019

이 연구의 목적은 지르코니아 기성관에 대한 교정용 밴드의 접착제로서 컴포머 시멘트와 레진 시멘트를 평가하고자 하였다. 총 30개의 시편을 준비하였다. 상악 우측 제 2유구치의 스테인리스 스틸 기성관에 컴포머 시멘트로 교정용 밴드를 접착한 I군과 지르코니아 기성관에 컴포머 시멘트로 밴드를 접착한 II군, 지르코니아 기성관에 레진 시멘트로 밴드를 접착한 III군으로 나누었고 밴드의 결합력을 측정하기 위해 인장력을 가하였다. I군, II군과 III군의 결합력의 평균값은 각각 0.79 MPa, 1.09 MPa 그리고 1.56 MPa였다. II군이 I군보다 유의하게 높은 결합력을 보였고, II군과 III군 의 결합력에는 유의한 차이가 없었다. 컴포머 시멘트와 기능성 단량체를 포함한 레진 시멘트는 유구치 지르코니아 기성관에 대한 교정용 밴드의 시멘트로서 양호한 결합력을 보였다.

• 대한치과의사협회지
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• 제55권12호
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• pp.850-860
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• 2017

Orthodontic treatment with premolar extraction is usually performed to correct bialveolar protrusion. These methods require the use of stiff rectangular working archwire which requires lengthy alignment and leveling before insertion. In this case report, interproximal reproximation was performed instead of extraction. To establish clearance between the archwire and resin domes fixing the archwire, an archwire was inserted into a water-soluble tube before fabricating resin domes. This tube is solved away by the saliva. During fabrication of resin domes, the archwire was deflected intentionally reflecting the displacement of teeth from their ideal position. This can be called as deflection-based bonding (DBB) technique. DBB is different from conventional method of positioning the brackets on its ideal position and then inserting an archwire to align the brackets. Because the orthodontic force of the archwire comes from its deflection from passive configuration, deflecting an archwire as needed can move the teeth more predictably than just bonding brackets on its ideal position. Also, areas with good alignment before orthodontic treatment can be maintained simply by not deflecting the archwire during bonding in these areas. After initial alignment, interproximal reproximation was performed to create 4.8 mm space in the maxillary arch and 4.2 mm space in the mandibular arch. These spaces were closed using orthodontic mini-implant anchorage thus retracting the maxillary incisors 4 mm posteriorly accompanied with 0.7 mm and 0.3 mm distal movement of right and left molars. By using interproximal reproximation and water-soluble tube with DBB, mild bialveolar protrusion was successfully treated without extraction.

• Restorative Dentistry and Endodontics
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• 제37권3호
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• pp.165-169
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• 2012

Closure of interdental spaces using proximal build-ups with resin composite is considered to be practical and conservative. However, a comprehensive approach combining two or more treatment modalities may be needed to improve esthetics. This case report describes the management of a patient with multiple diastemas, a peg-shaped lateral incisor and midline deviation in the maxillary anterior area. Direct resin bonding along with orthodontic movement of teeth allows space closure and midline correction, consequently, creating a better esthetic result.

• 대한소아치과학회지
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• 제23권2호
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• pp.549-558
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• 1996

Light-cured orthodontic composite resin has been widely advertised recently for use in bonding brackets. However, the curability of light-cured resin when light waves are diffused through metal brackets in questionable. The purposes of this study were to evaluate shear bond strength and failure patterns of visible light-cured resin(Lightbond) and chemically cured-resin(Mono-Lok 2), and to determine the relative value of light-cured resin as an alternative to conventional chemically cured resin. Each of the two resins was tested on twenty extracted human first premolars. Standard edgewise metal brackets were bonded to the teeth in accordance with the manufacturers' recommendation. After bonding, the teeth were stored for 24 hours at $37^{\circ}C$, 100% humidity. The shear bond strength was tested with a universal testing machine(Instron 4302), at 0.5mm/min crosshead speed. After debonding, brackets and enamel surfaces were examined with a scanning electron microscope and a stereoscopic microscope. The results were as follows : 1. Metal brackets bonded with Lightbond showed statistically higher shear bond strength than metal brackets bonded with Mono-Lok2. 2. The predominant failure site in Lightbond was the enamel-resin interface, and in Mono-Lok 2 it was the resin itself. 3. Enamel cracks were not found in any specimen. The above results suggest that direct bonding of metal brackets to enamel with light-cured resin bonding agent can be used effectively in clinics.

• 대한치과교정학회지
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• 제24권2호
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• pp.433-445
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• 1994

Bonding of brackets is one of the essential factors for successful orthodontic treatment' so bond strength of orthodontic adhesives are very important. The purposes of this research were to compare shear bond strength of various orthodontic adhesives and to evaluate failure sites. One-hundred twenty extracted human first premolars were prepared for bonding and premolar brackets were bonded to prepared enamel surfaces with Super C Ortho, Mono-$Lok^2$, Transbond, and Super C Ortho after applying Fluorobond. After bonding of brackets, teeth specimens were divided into 3 groups. In group 1 specimens were stored at humidor $37^{\circ}C$ in 1 hour, in group 2 specimens were stored at humidor $37^{\circ}C$ in 24 hours, thermocycled 10 times and in group 3 specimens were stored at humidor $37^{\circ}C$ in 24 hours, thermocycled 1800 times. Then the universal testing machine Instron 6022, Instron Co., U.S.A. was used to test the shear bond strength of brackets to enamel. After debonding, brackets and enamel surfaces were examined under stereoscopic microscope to determine the failure sites The results were as follows : 1. Shear bond strength was significantly highest of using Super C Ortho after applying Fluorobond and Super C Ortho In group 1, was highest of using Super C Ortho in group 2, and was highest of using Mono-$Lok^2$ in group 3. 2. According to time and temperature change, in using Super C Ortho the group 2 had significantly highest strength and group 3 had lowest strength, in using Mono-$Lok^2$ the group 2 and had higher strength than group 1 and in using Super C Ortho after applying Fluorobond shear bond strength decreased constantly, 3. The failure sites were tooth-resin interface in Super C Ortho after applying Fluorobond, Mono $Lok^2$ and Transbond and were at almost same ratio bracket base-resin interface and tooth-resin interface in Super C Orth.

• 구강회복응용과학지
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• 제38권1호
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• pp.52-59
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• 2022

고정성 교정치료 중 치아의 협면의 치경부 탈회가 종종 발생한다. 이번 증례보고에서는 교정치료 중 발생한 치아의 치경부 탈회를 직접 레진 비니어 수복을 통해 치료한 2가지 증례를 보고하고자 한다. 우식이 없는 초기 병변은 주기적인 불소도포, 식이조절, 구강위생 개선을 통해 재광화될 수 있으나 점차 진행됨에 따라 적절한 수복치료가 필요하며 병소 발생 후의 치료보다 예방에 중점을 두는 것이 더욱 바람직하다.

• 대한치과의사협회지
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• 제34권4호통권323호
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• pp.288-293
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• 1996

• 대한치과교정학회지
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• 제49권2호
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• pp.116-123
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• 2019

As an alternative to the conventional fixed appliance that uses orthodontic brackets, a simple round tube without a bonding base can be bonded to the tooth surface by covering the tube with flowable resin. In this technique, bent wires cannot be inserted into the simple tubes; therefore, repositioning of the simple tubes is often required for adjustments. To reduce repositioning of simple tubes, a dome-shaped resin covering of the simple tube can be designed with a customized in-and-out compensation, using three-dimensional computer-aided design software based on digital simulation of orthodontic tooth movement. In the present case, the use of simple tubes bonded with customized resin coverings in a Class I nonextraction case is described in a 17-year-old male, in whom moderate crowding of the anterior teeth was treated over an 8-month period. This case shows that simple tubes can be used as an alternative to brackets in some Class I nonextraction cases, with the potential benefit of reducing decalcification.

• 대한소아치과학회지
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• 제35권3호
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• pp.477-486
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• 2008

치과 임상에서는 여러 목적으로 Polymethyl methacrylate를 주성분으로 한 아크릴릭 레진이 사용되고 있으며, 특히 가철성 교정장치는 대부분 이것을 사용한다. 그러나 아크릴릭 레진은 중합이 완벽하게 이루어지지 않을 경우 인체에 악영향을 줄 수 있는 미반응 모노머가 레진에 잔존할 수 있다. 본 연구에서는 다양한 방법(온도, 압력, 수중 혹은 공기 중)으로 중합 조건과 시간을 달리 하여 교정용 아크릴릭 레진에서 발생하는 미반응 모노머의 용리량을 고성능 액체 크로마토그래피를 이용하여 정성 및 정량분석 하고자 하였다. 연구 결과, 모든 군에서 MMA를 제외한 다른 모노머는 용리되지 않았으며, 중합 방법에 따른 모든 실험군에서 미반응 모노머의 용리는 유의하게 감소하였고(P<0.05) 중합 방법을 한 가지만 사용하였을 때보다 2가지 이상 복합적으로 변화시켰을 때 모노머의 용리량이 더 감소함을 알 수 있었다. 또한 시간경과에 따라 모노머의 용리량이 유의하게 감소하여, 특히 1일 후 부터 급격한 감소를 보였다. 이상의 결과를 보아 중합 방법을 달리하였을 때 모노머의 용리량을 더 많이 감소시키고, 다른 중합 조건들도 복합적으로 사용하는 것이 용리량을 더 효과적으로 줄일 수 있을 것으로 생각된다. 그리고 중합 과정에서 온도, 수분, 압력의 조건을 강화하여 3일 이상 중합 시간을 가지는 것이 미반응 모노머의 용리량을 최소화할 수 있을 것으로 생각되었다.

• 구강회복응용과학지
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• 제37권4호
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• pp.209-216
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• 2021

목적: 본 연구의 목적은 접착제를 적용하지 않고 치열교정용 브라켓을 접착할 수 있는 레진시멘트의 법랑질에 대한 접착강도를 접착제를 적용한 경우와 비교하기 위함이다. 연구 재료 및 방법: 시편을 Transbond XT, GC Ortho Connect 및 Orthomite LC의 3개의 실험군으로 나누고, 노출된 법랑질 표면을 2분획으로 나누어 한 분획에는 37% 인산으로, 다른 한 분획에는 37% 인산 및 접착제 혹은 유니버셜 접착제로 표면 처리를 하였다. 치열교정용 브라켓에 3 종류의 시멘트를 각각 도포하고 접착을 한 뒤 전단접착강도를 측정하였다. 결과: Transbond XT와 Orthomite LC는 각각 접착제와 유니버셜 접착제를 적용한 후 치열교정용 브라켓을 접착할 경우 전단접착강도가 유의하게 증가하였다. 결론: Transbond XT와 Orthomite LC에서 산 부식 후 접착제의 적용이 치열교정용 브라켓의 전단접착강도를 향상시킬 것으로 기대한다.