• 대한치주과학회:학술대회논문집
• /
• 2001.05a
• /
• pp.13-13
• /
• 2001

• The Journal of the Korean dental association
• /
• v.40 no.7 s.398
• /
• pp.489-497
• /
• 2002

• Journal of the korean academy of Pediatric Dentistry
• /
• v.27 no.2
• /
• pp.256-261
• /
• 2000

Trauma to the tooth is the most common accidents in pediatric dentistry and tooth fracture occurs frequently. Fracture is classified into crown fracture, root fracture, and crown-root fracture which involves both. Also, it is classified into simple or complicated fracture depending on whether the pulp is exposed or not. When the fracture is extended down to the subgingival level following the long axis of the root, or when more than 1/3 of the root is involved, extraction is the primary treatment. But alternative treatment such as extruding the root fragment with orthodontic force and restoring it, or intentionally extracting the tooth and replanting it to a position which it can be restored. This is a case report on intentional replantation of a traumatized maxillary central incisor with crown-root fracture of a patient with mixed dentition. The teeth was extracted and immediate endodontic treatment, retrograde filling and resin restoration were carried out.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.36 no.2
• /
• pp.288-292
• /
• 2009

A crown-root fracture is defined as a fracture involving enamel, dentin, and cementum. The fractures may be grouped according to pulpal involvement into uncomplicated and complicated. Generally a vertically crown-root fractured tooth must be extracted. However, it should be mentioned that the cases have been reported where bonding of the coronal fragment has led to consolidation of the intraalveolar part of the fracture. Definitive conservative therapy comprises one of four treatment alternatives; fragment removal only, fragment removal with gingivectomy, orthodontic extrusion of apical fragment, and surgical extrusion of apical fragment. The choice is primarily determined by the exact information on the site and the type of fracture, but the cost and the complexity of treatment can also be decisional factors. On the other hand, intentional replantation of the teeth with vertical root facture reconstructed with resin bonding has emerged as a new promising method in recent years. This case presents an intentional replantation of the crown-root fractured maxillary central incisor reconstructed with resin bonding. However, an obvious increase of radiolucency was observed after 4 months and the tooth was re-fractured after 16 months.

• The korean journal of orthodontics
• /
• v.28 no.6 s.71
• /
• pp.981-989
• /
• 1998

Positions, angulation and mesiodistal dimension of lower incisors are important in esthetics, occlusion and post-treatment stability of tower arch. When lower incisor is congenitally missing, problems such as increased overjet and overbite, closing in of adjacent teeth and size/space discrepancies may occur. When creating treatment plans, incisor position and angulation, lip support, anteroposterior skeletal relationship canine-molar relationship, overjet overbite, remaining growth potential, crowding and anterior tooth ratio have to be considered. For an accurate analysis of incisal size discrepancy, diagnostic model set-up may be helpful. The two patients in this presentation both had two lower incisor missing, but the degree of crowding, skeletal relationship, lip support, molar relationship are different and therefore treatment plan was different as well. Long term follow-up may be necessary for stability and retention.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.32 no.3
• /
• pp.437-443
• /
• 2005

Dilaceration is most common in maxillary central incisor. Impaction by dilacerated tooth cause orthodontic problem such as tilting of adjacent tooth, midline deviation. Dilaceration is caused by trauma, cyst, other origin and tooth shape, degree of root curvature, location in the alveolar bone, ability of spontaneous eruption should be considered whether treat or not. Labially and lingually dilacerated tooth is difficult to spontaneous eruption. Thus, Prosthetic treatment alternative with extraction, auto transplantation, orthodontic traction with surgical exposure is included within the treatment alternative. These cases are about impacted central incisor with dilacerated root. We use closed eruption technique and guide impacted tooth into normal position by orthodontic traction.

• Journal of Dental Rehabilitation and Applied Science
• /
• v.28 no.1
• /
• pp.79-86
• /
• 2012

In most patients with severe crowding or lip protrusion, orthodontic treatment with tooth extraction is done. In these patients, even though space is closed after orthodontic treatment, gingival invagination is observed on the extracted site. Since there are possibilities of space recurrence and regional periodontic problems occurrence, periodontic treatment is necessary on the gingival invagination region. This case was a 16 year old female with a chief complaint of crooked teeth. Since her maxillary premolars were already extracted a few years ago at a local dental clinic, orthodontic treatment was done by extracting mandibular premolars. Unlike maxillary premolar regions, gingival invagination occurred in mandibular premolar regions and gingival flattening was done by excising the gingival invaginated region. Gingival flattening was done once on the left side, twice on the right side and showed stable results. This is a case report of a patient that was prone to gingival invagination after orthodontic treatment with extraction and was treated with gingival flattening.

• Journal of Dental Rehabilitation and Applied Science
• /
• v.24 no.3
• /
• pp.243-251
• /
• 2008

A subgingival crown-root fracture presents a restorative problem to the clinician because restoration is complicated by the need to maintain the sound tooth structures. Forced eruption offers a method of treatment of teeth fractured close to the alveolar crest. Extrusion of such teeth allows elevating the fracture line above the epitherial attachment and so the proper finishing margins can be prepared. The purpose of this case is to report successful tooth restoration using forced eruption in case of crown-root fractures.

• Journal of Periodontal and Implant Science
• /
• v.25 no.2
• /
• pp.372-385
• /
• 1995

본 연구의 목적은 비외과적 치주치료시 부가적으로 사용하기 위해 실험적으로 개발한 젤 형태의 테트라사이클린 및 테트라사이클린-구연산 혼합젤의 치근면에 대한 시간에 따른 활성도를 측정하고, 이를 용액 형태의 테트라사이클린 제제 또는 클로르헥시딘 들과 비교하는 것이다. 6명의 환자로 부터 18개의 발치된 치아를 실험대상으로 하였으며, 치아는 발치한 즉시 치석제거술과 치근활택술을 시행한 후 각 각 4개씩 4군으로 나누어 다옴과 같은 처치롤 하였다 ; 1) O.1% 클로르핵시딘 용액에 5분간 침전; 2) 50mg/ml의 테트라사이클린 용액에 5분간 침전; 3) 5% 테트라사이클린 젤에 5 분간 처리 ; 4) 테트라사이클린-구연산 혼합첼로 5 분간 처치; 5) 그리고 2개의 치아는 대조군으로서 멸균된 생리식염수에 5분간 처리하였다. 침전후 치아는 1ml의 tris-buffered saline이 담긴 용기에 옮겨 24시간 간격으로 탈착된 TBS용액올 교체하면서 실온에서 22일간 보관하였다. Porphyromonas gingivalis를 indicator organism으로 하여 microtiter assay를 이용하여 홉광도를 측정 함으로써 제거 된 용액 의 항 미생물 활성올 측정하였다. 1. 50mg/ml 의 테트라사이클린 수용액에 침전되었던 군은 생리식염수로 처리한 군에 비하여 17 일간 클로르헥시딘으로 처리한 군에 비하여는 16일간 항미생물 활성에 있어서 유의성 있는 차이를 보였다. 2. 테트라사이클린 젤과 테트라사이클린-구연산 혼합첼로 처리한 군은 대조군에 비하여 각 각 4일과 3일 까지 활성올 보였다. 3. 0.1% 클로르핵시딘 용액으로 처리한 군은 생리식염수로 처치한 군에 비하여 24시간 밖에 활성을 나타내지 못했다. 4. 전반척으로 테트라사이클린-구연산 혼합첼로 처리한 군에 비하여 테트라사이클린 첼로 처리한 군의 활성이 높았으나 유의성 있는 차이롤 보이지는 않았다.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.32 no.4
• /
• pp.687-692
• /
• 2005

Delayed eruption of a maxillary incisor results in midline shift, the space occupied by adjacent teeth and different levels of alveolar height. Extraction or surgical/orthodontic therapy is the most common treatment for a impacted maxillary incisor. Surgical repositioning provides another option for treatment of this problem. The advantages of this approach include immediate esthetic improvement, use of a single and simplified surgical procedure, simple and short orthodontic therapy, a normal gingival margin and the possibility of the developing root adapting to the new position. Autotransplantation of an immature tooth provides for possible adaptation of the developing root apex to the new position. A root with an open apex has good chance of pulp revascularization after transplantation.