• 대한심미치과학회지
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• 제28권1호
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• pp.18-26
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• 2019

OIC (open interproximal contact)는 임플란트 수복물과 인접한 치아 사이에서 발생할 수있는 현상입니다. 식편압입은 환자에게 매우 불편합니다. 다양한 방법으로 OIC를 해소하려는 노력이 필요해 보입니다.

• Journal of Periodontal and Implant Science
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• 제43권4호
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• pp.160-167
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• 2013

Purpose: This study examined the factors that can be associated with the appearance of the interproximal papilla. Methods: One hundred and forty-seven healthy interproximal papillae between the maxillary central incisors were examined. For each subject, a digital photograph and periapical radiograph of the interdental embrasure were taken using a 1-mm grid metal piece. The following parameters were recorded: the amount of recession of the interproximal papilla, contact point-bone crest distance, contact point-cemento-enamel junction (CEJ) distance, CEJ-bone crest distance, inter-radicular distance, tooth shape, embrasure space size, interproximal contact area, gingival biotype, papilla height, and papilla tip form. Results: The amount of recession of the interproximal papilla was associated with the following: 1) increase in contact point-bone crest, contact point-CEJ, and CEJ-bone crest distance; 2) increase in the inter-radicular distance; 3) triangular tooth shape; 4) decrease in the interproximal contact area length; 5) increase in the embrasure space size; and 6) flat papilla tip form. On the other hand, the amount of gingival recession was not associated with the gingival biotype or papilla height. In the triangular tooth shape, the contact point-bone crest distance and inter-radicular distance were longer, the interproximal contact area length was shorter, and the embrasure space size was larger. The papilla tip form became flatter with increasing inter-radicular distance and CEJ-bone crest distance. Conclusions: The relative position of the interproximal papilla in healthy subjects was associated with the multiple factors and each factor was related to the others. A triangular tooth shape carries a higher risk of recession of the interproximal papilla because the proximal contact point is positioned more incisally and the bone crest is positioned more apically. This results in an increase in recession of the interproximal papilla and flat papilla tip form.

• 대한치과의사협회지
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• 제52권8호
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• pp.491-505
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• 2014

Food impaction between the implant prostheses and adjacent teeth is the most frequently observed problem. It may be caused by the migration of the adjacent teeth. This symptom may be observed at the mesial aspect of implant prostheses especially, and related with the multiple contributing factors including teeth vitality and antagonist. Idal proximal contact with optimal strength and shape should be made for preventing the food impaction. Shape of customized abutment and prosthesis should have optimal emergence profile. Long duration from the extraction to the delivery of implant prostheses, the adjacent teeth and antagonist teeth may have possibility of occlusal interferences. Remained teeth mobility can induce the food impaction regardless of interproximal contact strength. Occlusal adjustment to remove occlusal interferences can be a method for enhancing the stability of interproximal contact.

• 대한치과보철학회지
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• 제42권4호
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• pp.425-442
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• 2004

Statement of problem: A difficulty in achieving a passive-fitting prosthesis can be overcome by individual crown restoation of multiple implants. But individualized crown has another difficulty in control of contact tightness and stress distribution. Purpose: This in vitro study is to evaluate the stress distribution and the magnitude in the supporting tissues around Endopore implants with different crown lengths, interproximal contact tightness, and the splinting effects. Material & methods: Three Endopore implants($4.1{\times}9mm$) were placed in the mandibular posterior edentulous area distal to the canine and photoelastic model was made with PL-2 resin(Measurements Group, Raleigh, USA). Restorations were fabricated in two crown lengths: 9, 13 mm. For non-splinted restorations, individual crowns were fabricated on three custom-milled titanium abutments. After the units were cemented, 4 levels of interproximal contact tightness were evaluated: open, ideal($8{\mu}m$ shim stock drags without tearing), medium($40{\mu}m$), and heavy($80{\mu}m$). For splinted restorations, 3-unit fixed partial dentures were fabricated. This study was examined under simulated non-loaded and loaded conditions(6.8 kg). Photoelastic stress analysis was carried out to measure the fringe order around the implant supporting structure. Results: 1. When restorations were not splinted, the more interproximal contact tightness was increased among the three implants, the more stress was shown in the cervical region of each implant. When crown length was increased, stresses tended to increase in the apex of implants but there were little differences in stress fringes. 2. When nonsplinted restorations were loaded on the first or third implant, stresses were increased in the apex and cervical region of loaded implant. Regardless of interproximal contact tightness level, stresses were not distributed among the three implants. But with tighter interproximal contact, stresses were increased in the cervical region of loaded first or third implant. 3. When the nonsplinted restorations were not loaded, there were little stresses on the supporting structure of implants, but low level stresses were shown in the splinted restorations even after sectioning and soldering. 4. With splinted restorations, there were little differences in stresses between different crown lengths. When splinted restorations were loaded, stresses were increased slightly on the loaded implant, but relatively even stress distribution occurred among the three implants. Conclusions: Splinting the crowns of adjacent implants is recommended for Endopore implants under the overloading situation.

• Journal of Periodontal and Implant Science
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• 제36권4호
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• pp.817-827
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• 2006

Purpose : This study was designed 1) to compare the perception of dental professionals and lay people with respect to minor variations in maxillary anterior tooth size and alignment and their relation to the surrounding soft tissues, and 2) to evaluate the normal tooth-gingiva topographical relationships in periodontally healthy young subjects, Materials and methods : Maxillary anterior teeth were intentionally diagrammed in varying degree of deviation with respect to one of three common anterior esthetic discrepancies including variations in crown length, shape of gingival margin, and length of interproximal contact, 17 images were generated to be preferentially selected by 2 groups consisting of dental professionals and lay people (total of 740). Smiling photographs of 120 dental students who had healthy periodontium were taken and the photographic images were analyzed to be classified as 17 kinds of altered image groups. Results : The results demonstrated noticeable difference between the varying levels of discrepancy. Both group preferred gingival margin of lateral incisor to be 0.5mm lower than that of central incisor. Lay people preferred the gingival margin shape that has 2/9 horizontal component of the crown width, while dental professionals preferred the gingival margin shape that has 1/9 horizontal component of the crown width. Lay people preferred longer length of the interproximal contact (two thirds of the crown length), whereas dental professionals preferred shorter length of the interproximal contact (half of the crown length). Photographic analysis of normal esthetic gingival topography revealed 2/9 horizontal component and short length of the interproximal contact which was of the hybrid nature of the preferences shared by lay people and dental professionals. Conclusion: The results of this study show that dental professionals and lay people demonstrated significant difference in their preference of dental esthetic components, which may then influence the decision making process by dental professionals with respect to designing the anterior esthetic gingival line.

• 대한치과보철학회지
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• 제62권1호
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• pp.47-53
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• 2024

부분 무치악 환자가 임플란트 고정성 보철물 치료를 받은 경우 interproximal contact loss (ICL)은 가장 빈번하게 발생하는 합병증이다. 일반적으로 보고되는 임플란트 보철물의 ICL은 자연치의 이동에 따른 임플란트 보철물과 자연치 사이에서 발생하는 경우가 대부분이다. 임플란트 보철물과 자연치 사이에서 발생하는 ICL의 원인은 여러가지가 있다. 임플란트 보철물 사이에서 발생하는 ICL에 대한 보고는 거의 없으며, 이는 임플란트 보철물과 자연치 사이에서 발생하는 ICL의 원인만으로는 설명하기 어렵다. 본 증례에서는 임플란트 보철물 사이에서 발생하는 ICL을 증례보고하고, 이에 대한 원인 및 대처방법을 논의하고자 한다.

• 대한치과교정학회지
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• 제41권3호
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• pp.154-163
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• 2011

본 연구는 교합 상태를 객관적이고 정량적으로 평가하기 위해 개발된 American Board of Orthodontics objective grading system (ABO-OGS)을 이용하여 교정치료 후 나타나는 재발 경향을 평가하고 이에 영향을 줄 수 있는 요소들과의 상관관계를 알아보고자 시행되었다. 부산대학교, 경희대학교와 단국대학교 치과병원 교정과에서 포괄적 교정치료를 받은 환자 중 치료종료 후 2년 이상의 유지기간을 갖는 80명의 환자를 대상으로 초진 시(T1)의 peer assessment rating (PAR) index, 치료 후(T2)와 유지 후(T3) 시기의 ABO-OGS를 측정하여 T2와 T3 간의 변화 양상을 각 항목별로 측정하였고, 나이, 성별, Angle 분류, 발치 여부, 유지기간, 초진 시의 상태와의 상관관계를 조사하기 위해 다중 회귀분석을 시행하여 다음과 같은 결과를 얻었다. T2 시기와 비교하여 T3 시기에 ABO-OGS의 7개 항목 중 치아 배열(alignment)은 악화되었으며, 교합 접촉(occlusal contact)과 치간 접촉(interproximal contact)은 개선되었고, 나머지 4개의 항목에서는 유의한 차이가 없었다. 다중 회귀분석을 시행한 결과, 유의한 회귀모형은 치아 배열(alignment), 교합 관계(occlusal relationship), 수평피개(overjet), 치간 접촉(interproximal contact) 항목이었으나, 회귀 모형들의 설명력이 낮았으며, 연령, 성별, Angle 분류, 발치 여부, 유지기간, 초진시의 상태(initial PAR index, T1)는 T2 시기와 T3 시기의 ABO-OGS 변화량을 설명하는 데 큰 영향을 미치지는 않는 것으로 보인다.

• 대한소아치과학회지
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• 제26권1호
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• pp.119-125
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• 1999

Air turbine handpiece를 사용하여 치간 법랑질을 삭제하는 Air-rotor stripping 술식은 악궁확장이나 발치 술식에 대한 대체방안으로써 arch length discrepancy를 해결할 수 있는 효과적인 접근법으로 사료된다.

• Journal of Periodontal and Implant Science
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• 제31권3호
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• pp.625-631
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• 2001

The anatomic structure around interproximal area plays an important role not only in the natural teeth, but also in the implant. The loss of papilla can lead to cosmetic deformity, phonetic problem, food impaction on the anterior dentition, and masticatory problem, food impaction and proximal caries on the posterior dentition. The purpose of this study was to evaluate the relationship between interdental papilla existence and distance from contact point to alveolar crest in Korean posteior dentition. 45 Korean adult patients(31males, 14 females) participated in this study. Measurements were carreid out total 126 interproximal areas, 18 first premolar, 31 second premolar, 40 first molar, and 37 second molar areas. Papilla index was recorded as suggested by Jemt. Distance between contact point and alveolar crest measrued by Florida $probe^{R}$, after flap elevation. Each distance was measured 10 times by every 0.1mm unit. The results showed that the mean Papilla index 1.37 and mean distance between contact point and alveolar crest was 7.44mm. The correlation between the Papilla index and distance was high negative correlation(Pearson correlation=-0.47), and it was statistically significant(P=0.000) When the distance between contact point and alveolar crest was 5mm, the loss of papilla was appeared almost in half cases. When the distance was 6mm, the papilla loss was present 95%, when 7mm, the papilla loss was 100%.

• Journal of Periodontal and Implant Science
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• 제20권1호
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• pp.150.2-150.2
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• 1990