• 치과방사선
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• 제23권2호
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• pp.265-275
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• 1993

The purpose of this study was to compare the interpretation results of the panoramic radiographs with those of intraoral radiographs in evaluation of alveolar bone loss. All radiographs were obtained from 100 patients who had visited the Dental Infirmary of Kyungpook National University Hospital for periodontal state evaluation. The results were as follows: The percentages of interpretable sites were 95.9%(94.6% in maxilla, 97.4% in mandible) on the intraoral radiographs, and 90.7%(84.0% in maxilla, 97.3% in mandible) on the panoramic radiographs. The concordance of interpretation scores of marginal bone loss between intraoral and panoramic radiographs was 66.3%(65.6% in maxilla, 66.8% in mandible). And according to the site, the highest concordance was in the distal surface of the mandibular 2nd premolar at 82.0%, and the distal surface of the mandibular 1st premolar(76.8%), the distal surface of the maxillary central incisor(75.8%), the mesial surface of the 2nd premolar (75.0%) in descending order of frequency. According to the interpretation scores of the marginal bone loss, the percentages of concordance between intraoral and panoramic radiographs were the highest on the score 10 at 76.4%, and the lowest on the score 8, 9. And the percentages of concordance were inverse proportional rate from the score 5 to the score 9. Number of the observed sites of the furcation involvement in bitewing and panoramic radiographs were 268 sites, and the percentage of interpretable sites was 92.9% in bitewing radiographs and 86.6% in panoramic radiographs. And the concordance rate of interpretation was 79.5%.

• Journal of Periodontal and Implant Science
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• 제31권2호
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• pp.269-276
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• 2001

The purpose of this study was to evaluate the clinical validity of multi-rooted teeth subjected to root-resection treatment. Over a period of 1-7 years, 60 root-resected molars in 59 patients were examined clinically and radiographically. All patients were p0eriodically recalled once or twice a year. Root-resections were due to periodontal, more specifically furcal bone loss or marginal bone loss,in 34 cases and extensive dental carious destruction in 10 cases. In other cases,root-resections resulted from 6 cases of root fracture, 6 cases of periodontal-endodontic combined lesion, and 1 case of endodontic problem. Root-resection was carried out on 26 maxillary molars and 34 mandibular molars. The results are as follows; 1. 14 cases(23.3%) were considered failures. 8 cases(13.3%) of them occurred within the first year(8 cases, 13.3%), 4 cases(6.7%)between 1-3 years, and 2 cases(3.3%) between 4-7 years. 2. 8 cases(13.3%) were considered failures due to periodontal reasons, 3 cases(5%) due to root fracture, 2 cases(3.3%) due to endodontic problem, and 1 case(1.7%) due to prosthetic problem. 3. 37 cases(61.7%) showed up for the recall appointments, and the percentage of failures(13.5%) was lower compared with that of all patients(23.3%). The results of the present study indicate that the prognosis of root-resected teeth is favourable if attention is paid to the selection of proper case and to achieving optimal oral hygiene and periodic check up.

• 구강회복응용과학지
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• 제39권1호
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• pp.1-8
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• 2023

목적: 이 연구의 목적은 치주질환자를 대상으로 치주판막술 시행 5년 후 치아의 상실여부를 파악한 뒤 치아 상실과 관련된 예후 요인을 분석하는 것이다. 연구 재료 및 방법: 2017년 1월부터 12월까지 치주치료를 시행한 22명의 환자, 124개의 치아를 대상으로 하였다. 치아 관련요인은 치료 당시에 수술을 진행한 술자에 의해 임상적으로 기록된 요인으로 치주수술 당일 최대 치주낭 깊이, 치근의 수, 치근 이개부 이환, 근관치료 여부, 보철상태를 기록하였다. 내원 당시의 초진 기록을 기준으로 환자관련 요인은 성별, 나이, 흡연 여부, 첫 내원 당시 치주질환으로 상실된 치아 여부, 당뇨병 이환 여부, 5년간 유지관리 응답도가 있으며 각각 요인들을 기록하였다. 각각의 요인들의 치아 상실 여부와 관련한 영향력을 평가하였다. 결과: 치아 관련요인이 발치에 미치는 영향력을 살펴본 결과 최대 치주낭 깊이, 골 소실, 치근 이개부 이환 중 치주낭 깊이(P : 0.000), 골 소실(P : 0.021)이 발치에 유의미한 영향을 미치는 것으로 나타났다. 특히, 최대 치주낭 깊이의 영향력이 가장 높은 것으로 나타났다. 환자 관련 요인은 치아발치에 유의한 결과를 보이지 않았다. 결론: 치주판막술을 시행한 환자에서 골 소실, 최대 치주낭 깊이가 치아 상실과 관련하여 통계적으로 유의성 있는 예후 요인으로 작용하였다.