• International Journal of Clinical Preventive Dentistry
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• 제14권4호
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• pp.209-215
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• 2018

In recent years, the numbers of the orthodontic dental patients have been rapidly increased in adolescent or young adult aged generation. It has been well known that it would be very hard to control the oral hygiene cares for orthodontic applied dental patient because of the complexity of the appliance. So the caries prevalence of the orthodontic dental patients would be higher than non-appliance persons, and it might be easy to cause the dental caries especially on the labial or buccal surface of the tooth through equipping the fixed type appliance with a long period, even though the alignment of the teeth would be arranged well. So, the massive preventive program for preventive dentistry should be needed for the dental patients for orthodontic treatment, in order to protect the dental caries and the periodontal disease for them. But, lots of the dentists or dental hygienists sometimes neglect of this point for preventive dental cares orthodontic dental patients, or do not know the importance and how to manage the skill for the preventive dental works in clinical. In this article, it will be introduced the basic theories and skills for preventive cares as tooth-brushing instruction, fluoride topical application and pit and fissure sealant, scaling and professional mechanical tooth cleansing and the diet control, for the dental patients with the fixed type of the orthodontic appliance, in case by case.

• 대한치과의사협회지
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• 제54권7호
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• pp.563-574
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• 2016

A clear overlay appliance is a type of a removable appliance made from transparent thermoplastic plastic film that covers the entire dentition to move the teeth. It is one of the most favored orthodontic methods opted for by adult patients; this treatment is esthetic, does not cause discomfort and allows oral hygiene to be easily managed when compared to other conventional fixed treatment methods. However, the use of clear overlay appliances, such as invisalign or clear aligner, is associated with various clinical challenges. In particular, the appliances require longer treatment periods compared to fixed treatment, and due to the structural characteristics of the appliances, it is difficult to make proper posterior occlusion and certain type of tooth movement, including extrusion, rotation and tip. Thus, the clear overlay appliances are regarded as supplementary appliances by most orthodontists and have been used for simple orthodontic treatments, such as partial anterior alignments or orthodontic relapse cases. Owing to the remarkable advancement in the field of 3D digital technology over a period of 15 years, the accuracy and convenience of modern clear overlay appliances have continuously improved. Moreover, orthodontic outcomes have also been greatly improved by the introduction of new materials and successful application of various biomechanical methods from conventional orthodontic treatments in the design of clear overlay appliances. This study investigates the clinical limitations that should be considered during the application of clear overlay appliances and also examines the efforts and methods used to overcome these challenges.

• 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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• 제46권1호
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• pp.55-61
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• 2016

Skeletal anchorage-assisted upper molar distalization has become one of the standard treatment modalities for the correction of Class II malocclusion. The purpose of this study was to analyze maxillary molar movement patterns according to appliance design, with the simultaneous use of buccal fixed orthodontic appliances. The authors devised two distinct types of midpalatal miniscrew-assisted maxillary molar distalizers, a lingual arch type and a pendulum type. Fourteen patients treated with one of the two types of distalizers were enrolled in the study, and the patterns of tooth movement associated with each type were compared. Pre- and post-treatment lateral cephalograms were analyzed. The lingual arch type was associated with relatively bodily upper molar distalization, while the pendulum type was associated with distal tipping with intrusion of the upper molar. Clinicians should be aware of the expected tooth movement associated with each appliance design. Further well designed studies with larger sample sizes are required.

• 대한치과교정학회지
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• 제34권2호
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• pp.189-195
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• 2004

이 연구의 목적은 고정식 교정장치 부착환자에서 음파잇솔질과 수동잇솔질의 치면세균막 제거능력을 비교, 평가하여 교정치료시 지속적이고 효과적인 구강위생 관리 방법을 제시하고자 하는데 있다. 비발치 환자로 상, 하악 제 2대구치까지 고정식 교정장치를 부착한 청소년기 아동(남자 23명, 여자 37명)과 성인(남자 15명, 여자 45명)을 대상으로 하여 각각을 수동잇솔질과 음파잇솔질 군으로 분류하였다. 음파칫솔은 Philips oral healthcare HX-4401을 사용하였으며 잇솔질시간은 음파, 수동 모두 2분으로 표준화시켰다. 잇솔질 후 치면세균막 지수는 Wilkins의 PHP를 변형시켜 측정하였다. 각 군의 치면세균막 지수를 측정하여 비교한 결과 다음과 같은 결과를 얻었다. 1. 청소년, 성인 모두에서 음파잇솔군의 치면세균막지수 감소효과가 수동잇솔군에 비해 유의하게 크게 나타났다(청소년 : p<0.01 성인 : p<0.05). 2. 청소년과 성인을 구분하여 치면세균막지수 감소양상을 비교하였을 때 청소년에서 더 큰 감소 효과를 보였다.(p<0.01). 3. 같은 칫솔종류를 사용할 경우 청소년, 성인간에 유의한 차이를 보이지 않았다.

• 대한치과교정학회지
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• 제20권2호
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• pp.409-417
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• 1990

Tooth movement would be impeded by frictional force arised between archwire and tube, bracket or elastics in the fixed orthodontic appliances, which could be changed variably by such several factors as the contact area, normal (perpendicular) force and the condition of contact surface. There were many literatures about frictional force in the orthodontic region, but different results were obtained from little controlled research so that was very difficult in clinical application. Therefore we have reviewed comprehensively previous literatures about frictional force and thus several results were obtained as follows: 1. For use species of the orthodontic wire, frictional force was influenced mainly by surface roughness of wire in the absence of binding, while that was influenced mainly by normal force in high binding angulation. 2. For the cross-section and diameter of the wire, the contact area influenced mainly on frictional force in the absence of binding, while wire stiffness influenced mainly on frictional force in high binding angulation. 3. The greater the bracket width, the greater frictional force, and frictional force of the plastic bracket was larger than that of the metal bracket. 4. For ligation type, frictional force of the stainless steel ligation was larger than that of the elastic ligation, and frictional force was directly proportional to ligation force. 5. Variable frictional force were occured from the saliva combined with such another factors as normal force and mode of surface oxide et al.

• 대한치과교정학회지
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• 제49권2호
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• pp.89-96
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• 2019

Objective: The purpose of this study was to assess the long-term stability of rapid palatal expansion (RPE) followed by full fixed edgewise appliances. Methods: This study included 67 patients treated using Haas-type RPE and non-extraction edgewise appliance therapy at a single orthodontic practice. Serial dental casts were obtained at three different time points: pretreatment ($T_1$), after expansion and fixed appliance therapy ($T_2$), and at long-term recall ($T_3$). The mean duration of the $T_1-T_2$ and $T_2-T_3$ periods was $4.8{\pm}3.5years$ and $11.0{\pm}5.4years$, respectively. The dental casts were digitized, and the computed measurements were compared with untreated reference data. Results: The majority of treatment-related increases in the maxillary and mandibular arch measurements were statistically significant (p < 0.05) and greater than expected for the untreated controls. Although many measurements decreased postretention ($T_2-T_3$), the net gains persisted for all of the measurements evaluated. Conclusions: The use of RPE therapy followed by full fixed edgewise appliances is an effective method for increasing maxillary and mandibular arch width dimensions in growing patients.

• 대한치과교정학회지
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• 제53권1호
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• pp.54-64
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• 2023

This case report describes skeletal anchorage-supported maxillary protraction performed with the Alternate Rapid Maxillary Expansion and Constriction (AltRAMEC) protocol over a treatment duration of 14 months in a 16-year-old female patient who was in the late growth-development period. Miniplates were applied to the patient's aperture piriformis area to apply force from the protraction appliance. After 9 weeks of following the Alt-RAMEC protocol, miniplates were used to transfer a unilateral 500-g protraction force to a Petit-type face mask. A significant improvement was observed in the soft tissue profile in measurements made both cephalometrically and in three dimensional photographs. Subsequently, the second phase of fixed orthodontic treatment was started and the treatment was completed with the retention phase. Following treatment completion, occlusion, smile esthetics, and soft tissue profile improved significantly in response to orthopedic and orthodontic treatment.

• 대한소아치과학회지
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• 제29권4호
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• pp.568-573
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• 2002

교정치료를 받는 어린이들의 우식활성에 관여하는 요인들을 규명하고자, 고정성 및 가철성 교정장치를 구강에 장착하고 있는 어린이 50명을 대상으로 Cariostat 우식활성검사를 실시하고 우식활성요인으로서 성별, 연령, 교정장치 장착기간, 장치의 종류, 장치를 장착한 부위, Angle씨 부정교합 분류, 우식경험치 수 등의 요인을 조사하였다. 연구대상의 Cariostat 검사성적은 0점과 3점이 각각 1명(2%)씩 있었고 1점이 22명(44%), 2점이 26명(52%)이었다. 저우식활성군의 평균 연령은 9.96세 고우식활성군의 평균 연령은 11.56세로서 두 군간의 차이가 유의하였다(P<0.01). 구강내 교정장치 장착기간은 저우식활성군이 16.13개월, 고우식활성군이 20.48개월로서 고우식활성군의 장착기간이 길었으나 유의한 차이는 없었다(P>0.05). 가철성 장치만 장착한 경우에 비해 고정성 장치를 장착한 경우에서 우식활성이 더 높았다(P<0.01). 상악에만 장착한 경우에 비해 상악과 하악에 다 장착한 경우에서 우식활성이 더 높은 분포를 보였으나 통계학적 유의성은 없었다(P>0.05). Angle씨 I 급 부정교합의 경우에 우식활성이 높고 III 급 부정교합의 경우에 우식활성이 낮은 분포를 보였으나 통계학적 유의성은 없었다(P>0.05). 우식경험치 수는 저우식활성군이 1.83개, 고우식활성군이 1.41개이었으나 유의한 차이는 아니었고(P>0.05) 전체 평균은 1.60개이었다.

• 대한치과교정학회지
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• 제29권3호
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• pp.361-374
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• 1999

구강내 고정식 교정장치의 장착으로 인해 치은염 및 치주염, 법랑질 탈회 및 치아 우식증, 치근 흡수, 치수변화 등 일시적 혹은 영구적 손상이 야기될 수 있다. 이러한 부작용발생의 원인으로 치태의 증가, 세균수의 증가와 조성의 변화등을 들 수 있고 이러한 변화는 치은의 염증과 탈회를 유발한다. 이에 본 연구는 한국인 고정식 교정장치 장착환자에서 장치장착 전후의 치태, 치은염 그리고 탈회의 변화를 시간에 따른 변화, 남녀간의 차이 그리고 좌.우 소구치 부위간의 차이를 통해 알아보고자 전신질환이 없고, 여자의 경우 초경이 지난 사람을 대상으로 대조군은 연세대학교 치과대학생 48명 (남자 26명, 여자 22명)과 실험군으로 고정식 교정장치로 치료할 환자 73명(남자 36명, 여자 37명)을 모두 잇솔질교육(TBI)을 실시한 후, 치태지수, 치은염지수 그리고 탈회 지수에 대하여 대조군은 3주 간격으로 2회를, 실험군은 최초측정을 하고 고정식 교정장치를 부착한 뒤 3주, 6주, 9주에 걸쳐 총 4회 측정을 실시하였다. 이상의 자료를 분석한 결과 다음과 같은 결론을 얻었다. 1. 치태지수(PI)는 고정식 교정장치 장착후 3주의 측정 이후 서서이 증가하였다. 2. 치은염지수(GI)는 고정식 교정장치 장착후 3주의 측정 이후 치태 지수의 증가보다 좀더 빠른 속도로 증가하였다. 3. 탈회는 3주와 6주 사이에서 발생하기 시작하며, 탈회지수(DI)는 처음과 비교하여 6주 측정시부터 증가하기 시작하였으나 통계적으로 유의한 차이를 발견할 수는 없었다. 4. 좌.우 소구치 부위의 비교에서는 실험군의 치태지수와 치은염지수에서 우측에서 높은 값을 보였다.우측간의 발생빈도는 구순열이 53.3:46.7, 구순치조열이 59.5:40.5, 구순구개열이 59.2:40.8 으로서 좌측의 발생빈도가 우측에 비해서 높았다. 3. 순구개열의 남:여 발생빈도는 구순열은 57.9:42.1, 구순치조열은 68.8:31.2, 구순구개열은 76.1:23.9 로서 남자의 발생빈도가 여자에 비해서 높았다. 그러나 구개열에서는 41.7:58.3으로서 여자의 발생빈도가 남자에 비해서 높게 나타났다. 4. 내원 환자를 연령군 별로 조사한 결과 7-12세 군이 $52\%$로서 압도적으로 많았고, 0-6세 군 ($20.4\%$), 13-18세 군($17.2\%$), 18세 이상 군 ($10.4\%$)의 순이었다. 5. 구순열의 봉합수술시기로는 0-3개월 군이 $60.3\%$로서 가장 많았고, 4-6개월 군이 $17.9\%$로 두 번째였다. 6. 구개열의 봉합수술시기로는 1-2세군이 $31.7\%$로 가장 많았고, 0-1세군은 $25.6\%$, 2-3세군이 $12.1\%$였다. 구개 및 상악 성장이 어느 정도 이루어진 5세 이상 군은 $11.6\%$를 차지하였다.7. 구순 반흔 제거수술시기로는 4-6세군 ($27.5\%$), 6-8세군 ($19.6\%$), 2-4세군 ($13.7\%$)이 $60\%$이상을 차지하여 초등학교 취학 전에 구순의 반흔을 제거하려