• Journal of Periodontal and Implant Science
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• 제41권1호
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• pp.44-50
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• 2011

Purpose: Pathologic tooth migration (PTM) is a tooth displacement which is derived from imbalance of tooth retention force and is dominantly found out in maxillary anterior area. PTM in maxillary anterior area was tried to corrected with periodontal treatment and a clear aligner in this study and the result was evaluated clinically and radiographically. Methods: For the treatment of a patient with chronic periodontal disease accompanied by maxillary anterior pathologic tooth migration, clear aligner was applied to move teeth after a series of case-related periodontal therapy. Clinically, probing depth, gingival recession, clinical attachment level and mobility were measured pre- and post-treatment, and radiographic examination was performed as well. Results: Clinically, we found the decrease of the probing depth, gingival recession, clinical attachment level and mobility. And we could also acknowledge the reduction of vertical and horizontal dimension on infrabony defect radiographically. However, it is still controversial if there was an actual bone filling. Conclusions: Clear aligner is an effective appliance to move teeth since it costs little in terms of expense and time. In addition, it wraps whole crowns, providing advantages to deal with crowding, spacing, and size of arch. In short, clear aligner could be a useful treatment option for PTM patient, since it provides decreased probing depth, gingival recession, clinical attachment level, mobility and esthetical restoration.

• Journal of Periodontal and Implant Science
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• 제32권1호
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• pp.51-59
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• 2002

The aim of the present study was to investigate the distribution of periodontally hopeless teeth in patients who had not been treated. Five hundred nineteen teeth of 163 patients who had visited at the Department of Periodontology, Chonbuk National University Hospital during the period from January 1999 to July 2001 were selected as a periodontally hopeless tooth. Selection criteria were as follows: 1) probing pocket depth more than 8mm, 2) tooth mobility of degree III, 3) radiographic bone loss more than 75%. The contralateral tooth to a hopeless tooth (experimental tooth) was designated as a control tooth. Between the experimental and control tooth, differences in probing pocket depth, tooth mobility and amount of radiographic bone loss were examined as well as correlation. The results showed that hopeless teeth were most frequently found in the maxillary first molar position and least frequently in the maxillary canine position. Differences between experimental and control teeth were 2mm in probing depth, 1 degree in tooth mobility, and 20% in amount of bone loss (p<0.01). The periodontal conditions between the experimental and control teeth showed correlation in general, however, statistical significances were found in posterior teeth positions. Within limitations of this study, it can be concluded that local factors may play a role in deterioration of periodontal disease along with symmetrical character of periodontal disease.

• 대한치과교정학회지
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• 제40권1호
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• pp.34-39
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• 2010

본 연구는 교정치료 종료 후 치아동요도의 종단적 계측을 통해 치아 주위조직의 안정화가 언제 나타나는지 살펴봄으로써 교정치료 후 유지장치 장착기간 설정에 도움이 되고자 시행되었다. 고정식 교정장치로 치료가 종료된 20명의 환자를 대상으로 교정장치 제거 직후 그리고 2년까지 3개월 간격으로 Periotest를 이용하여 상악 양측 중절치부터 제1대구치까지 치아동요도를 계측하고 교정치료 후 시간 경과에 따른 동요도 감소 양상을 비교 분석한 결과, 처음 6개월은 급한 양상으로, 다음 6개월은 보다 완만한 양상으로 감소하였고, 이후는 계속 감소하는 양상을 보였으나 통계적으로 유의한 차이를 보이지 않았다. 이상의 결과는 교정치료 후 치아 주위조직의 안정화는 1년이 지나서야 어느 정도 이루어짐을 그리고 처음 6개월은 매우 불안정함을 나타내는 것으로, 교정장치 제거 후 유지장치가 치료 후 1년간은 필요함을, 특히 처음 6개월 동안은 매우 중요함을 시사하였다.

• 대한치과의사협회지
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• 제58권3호
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• pp.169-179
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• 2020

The purpose of this study was to investigate the principal reasons for primary teeth extractions and the tooth type extracted in children. 1159 patients were selected in this study. Dental records and radiographs were reviewed and age, gender, medical history, type of tooth extracted and the reasons for extraction were collected. The data were statistically analyzed using Chi-square test. Total 2078 primary teeth were extracted. Central incisors(34.1%) were most frequently extracted. Extractions due to physiological mobility(77.5%) were the most frequent followed by caries(13.8%), orthodontic(3.9%), trauma(1.7%). Reason for the extraction was different according to age (p = 0.000), but there was no difference according to gender (p = 0.109). While extractions due to physiological mobility predominated overall, reason for extraction was different according to the tooth type. There was no previous treatment in 54.6% of primary teeth extracted due to caries. Excluded physiological mobility, caries are the most common reason for extraction of primary teeth. The importance of preventive care should be emphasized in order to preserve primary teeth and improve children's oral health.

• Journal of Periodontal and Implant Science
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• 제30권1호
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• pp.157-168
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• 2000

Periodontal surgery can be directed to remove the irritants from the tooth surface and reduce the periodontal pocket. The purpose of this study is to compare the clinical effects after between modified Widman flap and modified flap in periodontal patients. Ninety six molar area teeth of 9 patients were used. One of sextants performed a modified Widman flap, while the other side performed a modified flap. After initial periodontal therapy, the following measurements prior to surgery(baseline) were taken : pocket depth, gingival recession, clinical attachment level, tooth mobility, bleeding on probing. Also these measurements were taken at 4 weeks, 8weeks, and 12 weeks after surgery. Significant decrease of pocket depth was shown in both techniques, and the degree of decrease was significant in modified flap than modified Widman flap at 12 weeks. Significant increase of gingival recession was shown in both techniques, and the degree of increase was significant in modified Widman flap than modified flap at 4 weeks, 8 weeks, and 12 weeks. Significant attachment gain was shown in both techniques, and the degree of increase was significant in modified flap than modified Widman flap at 4 weeks, 8 weeks, and 12 weeks. Significant increase of tooth mobility was shown in both techniques at 4 weeks, but the decrease of tooth mobility was shown at 12 weeks. Greater decrease of bleeding on probing was shown in both techniques at 4 weeks. Modified flap was better than modified Widman flap in the decrease of gingival recession and the attachment gain. These results indicate that modified flap operation is better than modified Widman flap operation in the effect of periodontal treatment.

• 대한치과의사협회지
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• 제8권9호
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• pp.507-508
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• 1970

• 대한치과의사협회지
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• 제8권9호
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• pp.509-512
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• 1970

• 대한치과의사협회지
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• 제8권9호
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• pp.513-518
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• 1970

• 대한장애인치과학회지
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• 제14권1호
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• pp.26-30
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• 2018

9세 레녹스-가스토 증후군을 앓고 있는 여아가 정기검진을 위해 연세대학교 치과대학병원 소아치과에 내원하였으며 구강 내 임상 검사 시 유견치 및 제1유구치의 동요도가 관찰되었다. 본과 내원 두 달 전 폐렴으로 인한 입원 및 치아로 추정되는 물질의 흡인 병력이 있었으며 치과에 내원했을 당시 구강 내에서 상악 좌측 제1유구치가 관찰되지 않았다. 해당 치아가 흡인되어 폐렴을 유발했을 가능성이 높은 것으로 판단하고 동요도가 있는 나머지 유치의 발치를 시행하였다. 인후 반사가 제한되어 흡인 위험성이 높은 장애 환자들에서는 치과 치료 상황 외에도 구강 내 이물질의 흡인이 일어날 수 있으므로 동요도가 있는 유치나 잘 맞지 않는 보철물 등을 예방적으로 제거하는 것이 흡인의 위험성을 줄일 수 있을 것으로 생각된다.

• Journal of Periodontal and Implant Science
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• 제37권2호
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• pp.287-295
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• 2007

As a general treatment modality of subgingival tooth defect in aethetic area, implant or crown and bridge therapy after extraction of affected tooth can be used. But as more conservative treatment, crown lengthening can be considered and not to lose periodontal attachment and impair aethetic appearance, surgical extrusion can be considered as a treatment of choice. In this case report, 3 cases of surgical extrusion was represented and appropriate time for initiation of endodontic treatment according to the post-surgical tooth mobility was investigated. In 8 patient who has subgingival tooth defect in aethetic area, intracrevicular incision is performed and flap was reflected with care not to injure interproximal papillae. With forcep or periotome, tooth was luxated and sutured in properely extruded position according to biologic width with or without $180^{\circ}$ rotation. 8 cases show favorable short and long term results. In some cases, surgical extrusion with $180^{\circ}$ rotation can minimized extent of extrusion and semi-rigid fixation without apical bone graft seems to secure good prognosis. In 8 cases, endodontic treatment started about 3 weeks after surgery. This time corresponds with the moment when mobility of extruded tooth became 1 degree and this results concide with other previous reports. If it is done on adequate case selection and surgical technique, surgical extrusion seems to be a good treatment modalilty to replace the implant restoration in aethetic area.