• 대한소아치과학회지
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• 제32권1호
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• pp.13-17
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• 2005

소아, 청소년 환자의 경우 성인에 비해 구치부 인접면 우식의 빈도가 높은 편이며, 그 수복 재료에 있어서 심미성이나 치질 삭제량 감소 등의 이유로 복합레진의 사용이 늘어나고 있는 추세에 있다. 복합레진을 이용한 구치부 인접면 수복에 있어서, 술자의 기호와 기술에 따라 여러 가지 매트릭스 밴드를 선택할 수 있으며, 이러한 매트릭스 밴드는 인접면 변연의 적합성과 이에 의한 미세 누출의 감소, 타액에 대한 방습 효과 및 마무리와 연마과정을 용이하게 하는 등 많은 임상적인 기능을 가진다. 본 증례에서는 복합레진과 교정용 밴드를 이용하여, 유치와 영구치 각각의 인접면 우식의 치료를 시행하였으며, 교정용 밴드를 이용한 2급 와동의 복합레진 충전에 있어서 기존의 매트릭스 밴드를 이용하는 경우에 비해 다음과 같은 장점이 있다고 판단하였다. 1. 우수한 변연 적합성에 의해, 치아 외형의 재현이 용이 하였으며 타액에 대한 방습 효과도 우수하였다. 2 복합레진의 충전이나 중합에 있어서, 교정용 밴드의 견고성에 의해 수복물의 변형이 작다고 판단되었다. 3. 간격 유지 장치 등의 이유로 교정용 밴드의 장착을 많이 시행하고 있는 소아치과 의사의 경우, 타과 전공 치과의사에 비해 비교적 교정용 밴드의 장착을 보다 효과적으로 할 수 있으며, 또한 적절하게 선택된 교정용 밴드는 위와 같은 장점들에 의해 수복 치료를 보다 용이하게 해주는 효과가 있다.

• 대한치과교정학회지
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• 제24권2호
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• pp.419-430
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• 1994

The purpose of this study was to investigate the cytotoxicity of orthodontic bands in vitro and in vivo4 types of orthodontic bands were applied to cultured fibroblast and the supernatants were injected into dorsal subcutaneous tissue of mice. In vitro.the cytotoxixity was evaluated by an MTT assay after 2 and 6days. In vivo, the histopathologic observation was performed 2 days after injection. The results were : 1. The cell viability was significantly decreased in the group added phosphoric acid in comparison to control group, but there was not any significance among the experimental group after 2 days. 2. Cell viability decreased in the high Ni containing group after 6 days. 3. The histopathological finding was that the Cr-containing group showed severe infiltration of inflammatory cells and muscular destruction.

• 대한치과의사협회지
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• 제20권3호통권154호
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• pp.233-237
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• 1982

A review of the literature was presented, illustrating the effect that gingivally retained orthodontic elastic bands have on the periodontal tissues. A case report was presented for treatment of mobile maxillary central incisors secondary to a subgingival elastic band. Following surgical removal of elastic band and periodontal debridement, the teeth were successfully retained with active orthodontic appliances. Until a harmless radiopaque medium can be safely incorporated into elastic bands, extreme caution in their use should be observed. Not only should all attempts be made to anchor the elastic bands to the clinical crown, but the patient should receive through instructions in their placement and removal.

• 대한치과교정학회지
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• 제53권1호
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• pp.16-25
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• 2023

Objective: We aimed to evaluate the cell viability and antimicrobial effects of orthodontic bands coated with silver or zinc oxide nanoparticles (nano-Ag and nano-ZnO, respectively). Methods: In this experimental study, 30 orthodontic bands were divided into three groups (n = 10 each): control (uncoated band), Ag (silver-coated band), and ZnO (zinc oxide-coated band). The electrostatic spray-assisted vapor deposition method was used to coat orthodontic bands with nano-Ag or nano-ZnO. The biofilm inhibition test was used to assess the antimicrobial effectiveness of nano-Ag and nano-ZnO against Streptococcus mutans, Lactobacillus acidophilus, and Candida albicans. Biocompatibility tests were conducted using the 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay. The groups were compared using oneway analysis of variance with a post-hoc test. Results: The Ag group showed a significantly higher reduction in the number of L. acidophilus, C. albicans, and S. mutans colonies than the ZnO group (p = 0.015, 0.003, and 0.005, respectively). Compared with the control group, the Ag group showed a 2-log₁₀ reduction in all the microorganisms' replication ability, but only S. mutants showed a 2-log₁₀ reduction in replication ability in the ZnO group. The lowest mean cell viability was observed in the Ag group, but the difference between the groups was insignificant (p > 0.05). Conclusions: Coating orthodontic bands with nano-ZnO or nano-Ag induced antimicrobial effects against oral pathogens. Among the nanoparticles, nano-Ag showed the best antimicrobial activity and nano-ZnO showed the highest biocompatibility.

• 대한치과교정학회지
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• 제11권2호
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• pp.151-160
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• 1981

The purpose of this study was to compare the retentive values of various dental cements used for cementing the orthodontic bands on the teeth. Sound freshly extracted human premolar teeth were selected for the study. Eleven commercial dental cements (Zinc phosphate, reinforced Zinc-oxide eugenol, Carboxylate and Glass ionomer cements) were handled under standardized conditions. All cemented speciments were then kept in a thermostatic humidor cabinet regulated at $23{\pm}2^{\circ}C$ and more than $95\%$ relative humidity and tested after 24 hours and 1 week each. The force required to remove the cemented orthodontic bands from the teeth was determined on an Instron Universal Testing Machine using a modified specimen holding device with a cross-head speed of 0.20mm/min. The results obtained were as follows: 1, The retentive values of the band cemented with zinc phosphate cements and carboxylate cements were considerably higher than those of the reinforced zinc oxide-eugenol and glass ionomer cements. 2. There was no significant difference between the retentive value of carboxylate cements as compared with zinc phosphate cements. 3. The retentive value of the reinforced zinc oxide eugenol cements was lowest all of the coements. The retentive values expressed for all cements up to at least one week were highly but no significant difference was found between the 24-hour and 7 day time intervals.

• 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.

• 대한치과교정학회지
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• 제23권3호
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• pp.311-318
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• 1993

This study was done to evaluate the effect of fixed orthodontic patients on the level of oral streptococci, Streptococcus mutans, lactobacilli, yeasts in saliva. 35 patients wearing bands were compared with age-matched 35 non-banded control group by conlony counting method on the specially designed culture medium. The following results were obtained ; 1. The colony forming unit(CFU) of total streptocci per militer of saliva in subjects with or without orthodontic treatment showed no significant statistical difference between them(p>0.05). 2. The colony forming unit(CFU) of total Streptococcus mutans per mililiter of saliva in subjects with orthodontic treatment showed significantly higher than those without orthodontic treatment(p<0.05). 3. The colony forming unit(CFU) of total lactobacilli per mililiter of saliva in sujects with or without orthodontic treatment showed no significant statistical difference between them but higher tendency in those with orthodontic treatment(p=0.052). 4. The colony forming unit(CFU) of total yeasts per mililiter of saliva in subjects with or without orthodontic treatment showed no significant statistical difference between them(p>0.05).

• 대한치과교정학회지
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• 제43권1호
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• pp.29-34
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• 2013

Objective: To examine the prophylactic potential of 3 orthodontic bonding adhesives: Fuji Ortho SC, Illuminate, and Resilience. Methods: Thirty-six Wistar Wag rats were randomly divided into 4 groups consisting of 9 rats each. One of the groups received no treatment and was used as a control. In the other groups, individual bands coated with one of the 3 adhesives were cemented to the lower incisors. Enamel samples were obtained after 6 and 12 weeks and analyzed using scanning electron microscopy in combination with energy dispersive spectrometry. Results: Six weeks after band cementation, no fluoride was found in the enamel of the lower incisors. After 12 weeks, there was no fluoride in the enamel of teeth coated with the Resilience composite. However, in the case of the Illuminate composite and the resin-modified glass ionomer Fuji Ortho SC cement, the depth of fluoride penetration reached $2{\mu}m$ and $4.8-5.7{\mu}m$, respectively. Conclusions: Fluoride ions from orthodontic adhesives can be incorporated into the surface layer of the enamel. Orthodontists may apply orthodontic adhesives, such as the Fuji Ortho SC, to reduce the occurrence of caries during orthodontic treatment with fixed appliances.

• 대한치과교정학회지
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• 제15권2호
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• pp.291-301
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• 1985

Fifty subjects who were to be treated with fixed orhodontic appliances by light wire edgewise technique were selected. Bands with different marginal depth were made in first molar and direct bonding brackets were bonded in second premolar. For determining the effects of fixed orthodontic appliance on the gingival tissue, the changes of clinical crown length, periodontal pocket depth, gingival sulcus fluid were checked. The results were as follows: 1. Gingival condition was deteriorated after wearing the fixed orthodontic appliance, and the deteriorative rate was decreased gradually. 2. The greatest gingival change was occurred in the maxillary first molar among the experimental teeth. 3. The gingival change of maxillary teeth was greater than that of mandibular teeth. $(p\leq0.01)$ 4. The greater gingival change was occurred around subgingivally located band than around supragingivally located band. 5. Comparing the gingival changes of banded teeth with them of bonded teeth, the gingival tissue was more effected by oral hygiene than by type of appliances. 6. In the quantitive changes of gingival crevicular fluid, there was no exact relationship with gingival inflammation.

• 대한치과교정학회지
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• 제42권5호
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• pp.263-269
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• 2012

Objective: To evaluate the antimicrobial effect of different frequencies of brushing with fluoride toothpaste on the levels of salivary mutans streptococci and lactobacilli in children undergoing fixed orthodontic treatment. Methods: The study included 22 patients scheduled for fixed orthodontic therapy distributed between 2 groups with different hygiene regimes. All the subjects received identical braces, bands, and brackets bonded with the same material. Stimulated saliva samples were obtained before placement of the appliance and at 6, 12, and 18 weeks during the therapy. Saliva samples were cultured on selective microbial agar for the detection of microorganisms. Results: Salivary mutans streptococci were significantly suppressed throughout the experimental period in the group that brushed 4 times a day as compared to the group that brushed twice a day. Salivary lactobacilli were not significantly affected by the frequency of brushing with 0.32% sodium fluoride (NaF) toothpaste. Conclusions: The use of 0.32% NaF-containing toothpaste more than 3 times a day has effective antimicrobial activity on mutans streptococci but not lactobacilli in the saliva of children with fixed orthodontic appliances.