• The Journal of Korean Academy of Prosthodontics
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• v.13 no.1
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• pp.11-22
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• 1975

This study is to determine the severity and direction of the movement of the adjacent tooth into the created space by tooth or teeth loss. The random samples 387 cases (upper; 121 cases, lower; 266 cases) were selected with surveying record under some criteria. Edentulous area is grouped into the free end type and the tooth borne type. The following results were obtained. In the tooth borne type, slight distal movement of the adjacent tooth into the edentulous space was obtained. And the tooth distal to the edentulous space moved into the space in proportion to the duration of the edentulous state. Elongation of the opposing tooth of the free end type was more severe than that of the tooth borne type. And no inter-relationship between the severity of the elongation and the duration of the edentulous state In general, adjacent teeth had normal and mesial inclination. Lower teeth migrated mesially and lingually (especially in the distal tooth to the edentulous space in the tooth borne type). Upper adjacent teeth usually moved into the normal direction.

• Journal of the Korean Academy of Esthetic Dentistry
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• v.28 no.2
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• pp.86-94
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• 2019

Tooth impaction make various problems which are pathologic changes, functional defect and esthetic troubles. Sometimes impacted tooth are extracted. But surgical exposure of impacted tooth and orthodontic forced eruption are usually used a lot to solve these problems. Impacted tooth for orthodontic treatment has two impacted patterns 1) Simple impaction outside alveolar bone covered soft tissue, 2) Fully impaction under alveloar bone. So I introduce way to exposure of impacted tooth for orthodontic treatment with various cases and literatures.

• Journal of the korean academy of Pediatric Dentistry
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• v.43 no.3
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• pp.299-305
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• 2016

The aim of this study was to identify the causative genetic mutation in a family with non-syndromic oligodontia. The 7-year-old female proband and her mother underwent oral examination, panoramic radiographs were obtained and blood samples were collected. All exons of the PAX9 gene were amplified by polymerase chain reaction and sequenced. The sequencing results were compared with the standard human gene sequence. The proband lacked 11 permanent teeth, and her mother lacked 19 permanent teeth. No other birth defects were observed. As a result of gene analysis, there was a novel heterozygous nonsense mutation (c.184G>T, $p.Glu62^*$) in exon 2 in both affected subjects. It is suspected that the nonsense mutation leads premature termination of translation, yields a truncated protein 280 amino acids shorter than the wild-type protein. These defects include parts of the paired box domain, a DNA-binding site that plays an essential role in protein function. Otherwise, more likely the mutant transcript would be degraded by nonsense-mediated decay system, resulting haploinsufficiency to cause oligodontia in this family.

• Journal of Dental Rehabilitation and Applied Science
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• v.36 no.4
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• pp.272-281
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• 2020

Agenesis of permanent tooth in adolescent patients can be treated either by orthodontic treatment for space closure or by maintaining the space until implant restoration can be carried out in adult. However, gradual atrophy of alveolar bone width makes it difficult to restore the prosthesis in the future or may cause unaesthetic results. Therefore, maintaining of not only the missing space but also the alveolar bone width should be considered. This case is a treatment whereby a temporary replacement of missing 2 mandibular incisors in adolescent patient was carried out using 2 temporary anchorage devices (TADs). Two TADs were placed horizontally 2 - 3 mm below the top of alveolar ridge, and fixed with artificial teeth by stainless steel wires extended. During the 2 year follow-up, neither gingival inflammation nor loss of the TADs have occurred. In the radiographic evaluation, the growth of the adjacent alveolar bone was not inhibited, and the width of the alveolar bone was maintained.

• The Journal of Korean Academy of Prosthodontics
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• v.56 no.1
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• pp.40-49
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• 2018

It is reported that the causes of unaesthetic proportion of anterior teeth vary widely. Especially, when the unaesthetic tooth proportion of the mandibular incisors arises due to the wear of the anterior teeth accompanied by the compensation of the alveolar bone, it may cause serious functional and aesthetic problems. In such case, it should be considered that the evaluation of vertical dimension and tooth proportion as well as smile line, soft tissue and hard tissue morphology. And, increase of vertical dimension or clinical crown lengthening followed by prosthodontic restorations is needed to improve the interdental mesial/distal, width/length ratio considering the anterior guidance. This case report demonstrates functional and aesthetic improvements through systematic diagnosis and treatment procedures in a 48-year-old male patient with unaesthetic anterior teeth proportion because of tooth wear accompanied by the compensation of alveolar bone and defect of several central incisors due to chronic periodontitis.

• Journal of the korean academy of Pediatric Dentistry
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• v.36 no.4
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• pp.607-612
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• 2009

The malignant tumor in childhood is one of the main causes of children s death due to disease. The traditional treatment for the malignancy is known for the radiation therapy and the chemical therapy or both. However, the treatments tend to induce intraoral complications. Different from adults, almost all children on cancer therapy are expected to have dental complications, because their permanent teeth are on the developmental stage. The degree of dental complication depends on the patient's age, type of chemical and other factors-radiation dose and frequency. In this report, 3 children who had experienced the anti-cancer therapy on their age between 1 and 4 years were selected and dental complications were examined. The children have chance for the various oral complications including the developmental problems such as agenesis, microdontia and hypoplasia of the teeth. Therefore, it's important to understand the side-effects of anticancer therapy during the permanent teeth had been developmental stage in young patients. Also, oral health care specialists, including pediatric and hospital dentist can support the oncology team by providing basic oral care, implementing oral care protocols, delivering emergency dental treatment undergoing anticancer treatment.

• The Journal of Korean Academy of Prosthodontics
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• v.54 no.1
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• pp.65-71
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• 2016

Gradual occlusal attrition is a normal process of aging. However, severe attrition causes pathogenic pulp, occlusal disharmony, functional disorder and esthetic problems. Alteration of vertical dimension should be considered for space regaining for tooth restoration, esthetic improvement or correction of occlusal relationship. Vertical dimension should be determined within the range of minimal invasive process satisfying patient's esthetic requirements and operator's functional goal. And patient's adaptation to newly determined vertical dimension should be assessed simultaneously. Deep overbite is not a simple problem of overbite, instead it is an usually complicated problem with anterior-posterior occlusal relationship. Considering these facts, appropriate restoration of edentulous part as well as improvement of anterior-posterior relationship should be performed to solve this fundamental problems. In this study, a 67 year-old male patient with many worn teeth and loss of posterior teeth was treated with removable partial denture at edentulous mandibular area to increase vertical dimension and fixed prostheses at dentulous maxillary and mandibular area. With these treatments, we attained a satisfactory result in functional and esthetic aspects as a report case.

• The Journal of Korean Academy of Prosthodontics
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• v.61 no.3
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• pp.215-226
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• 2023

Severe wear of the anterior teeth facilitates the loss of anterior guidance, which protects the posterior teeth from wear during excursive movement. Additionally, when treating patients with collapsed occlusion due to multiple tooth loss and tooth wear, it is important to determine the presence of vertical dimension loss through accurate clinical and radiographic examinations and diagnostic wax-up. The patient of this case is a 44-year-old female patient who complained of overall tooth wear and loss of posterior teeth due to bruxism and clenching habits, visited the hospital with the address of restoring masticatory function and improving aesthetic appearance through prosthetic treatment. Through model analysis and diagnostic wax-up, an increase in vertical dimension was determined, and full mouth restoration with fixed prostheses was planned. The degree of adaptation to the vertical dimension was confirmed step by step using an occlusal splint designed with CAD (Computer aided design) software and 3-D (3-Dimensional) printed, and then restored with provisional restoration and after a 4-month adaptation period, the entire dentition was restored with metal ceramic crowns and implants. Through this procedure, satisfactory treatment results were obtained in terms of function and aesthetics.

• Journal of the korean academy of Pediatric Dentistry
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• v.30 no.3
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• pp.471-476
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• 2003

The success of autotransplantation depends on the viability of periodontal ligament in the transplanted tooth. Mechanical injury to periodontal tissues frequently results in dental root resorption and ankylosis, which leads to the failure of transplantation. Enamel matrix derivative(EMD) Which contains several enamel matrix protein (amelogenin family) has been reported to be effective in some periodontal therapies has been recently used to induce periodontal regeneration. EMD promotes proliferation of periodontal ligament cells and is suggested to be useful for transplantation. In this case, we report a clinical case of EMD application in the transplantation of an impacted and immature tooth of a 14 year-old girl to enhance the periodontal regeneration.

• The Journal of Korean Academy of Prosthodontics
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• v.54 no.4
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• pp.451-457
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• 2016

Prosthodontic decision-making process is done through analysis of clinical information and mutual communication between patient and dentist. When opposing teeth are extruded due to missing tooth or tooth defects, selection of appropriate treatment plan and predictory prognosis can be complicated in functional rehabilitation. In case of severely disharmonious occlusal plane result from extruded teeth, re-establishment of the occlusal plane is required, if necessary via prudent evaluation. In this case, class III patient had unesthetic appearance and mastication discomfort caused by disharmonious occlusal plane due to severe extrusion. Through a structured diagnostic process, appropriate treatment plan was selected. Esthetic and functional results were obtained through from full mouth rehabilitation with re-establishment of the occlusal plane.