• 대한소아치과학회지
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• 제30권2호
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• pp.326-333
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• 2003

매복치의 적절한 맹출 유도를 위해서는 유치의 상태, 치조골과 치아와의 상관관계, 환자의 치령, 치료에 대한 환자의 협조도 및 경제적 상태의 고려 등 많은 요소에 좌우되는 복잡한 치료계획이 필요하다. 만약 맹출장애의 원인이 발견되었다면, 맹출 유도를 위해서는 원인의 제거와 다양한 술식이 사용될 수 있다. 특히 치아이식법은 매복된 치아의 위치가 외과적인 노출과 후 교정적인 견인이 어려운 곳에 존재하는 경우, 발치에 앞서 사용할 수 있는 유용한 방법이다. 본 증례는 매복 상악 견치의 자가이식을 시행한 3증례를 보고한 것으로, 자가이식 치료 후 관찰 결과 다음과 같은 결론을 얻었다. 공여 치아 제거시 가해지는 외상이 최소가 되게 하여야 한다. 치근단이 완성된 치아를 이식할 경우에는 치수괴사의 가능성이 높으므로 치수치료를 고려하여야 한다. 복잡한 매복증례에서 교정치료시 소요되는 경비 및 시간을 고려하여 치아이식을 시행할 수도 있다. 수용부의 치조와는 공여 치아의 치근보다 약간 커야 하며, 공여치아의 치근 크기와 치조골의 순설측 폭경에 따라 open 또는 closed procedure로 형성할 수 있다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제33권2호
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• pp.173-180
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• 2007

According to the increase in use of implants in clinical dentistry, new kinds of complications happen. Complications that can happen during implant placement are bleeding, nerve injury, jaw fracture, fenestration of maxillary sinus or nasal cavity, dehiscence, fenestration, injury of adjacent tooth. And complications that can happen after implant operation are infection, bleeding, hematoma, chronic sinusitis, peri-implantitis. Problems that are confronted during implant placement happen by inadequate preoperative treatment plan, inadequate consideration about individual anatomic difference, inadequate operation process and lack of experience of clinician. It is important that clinicians consider possible complications in advance and make a comprehensive treatment plan. We report the patient who was happened ramus fracture during block bone harvesting from ramus of severely atrophic mandible, the patient who came to emergency ward due to postoperative swelling and bleeding and the patient whose implant was migrated to maxillary sinus with a review of literature.

• Journal of Dental Anesthesia and Pain Medicine
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• 제21권4호
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• pp.283-309
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• 2021

Achieving profound anesthesia in mandibular molars with irreversible pulpitis is a tedious task. This review aimed at evaluating the success of buccal/lingual infiltrations administered with a primary inferior alveolar nerve block (IANB) injection or as a supplemental injection after the failure of the primary injection in symptomatic and asymptomatic patients with irreversible pulpitis in human mandibular molars. The review question was "What will be the success of primary and supplemental infiltration injection in the endodontic treatment of patients with irreversible pulpitis in human mandibular molars?" We searched electronic databases, including Pubmed, Scopus, and Ebsco host and we did a comprehensive manual search. The review protocol was framed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) checklist. We included clinical studies that evaluated and compared the anesthetic outcomes of primary IANB with primary and/or supplementary infiltration injections. Standard evaluation of the included studies was performed and suitable data and inferences were assessed. Twenty-six studies were included, of which 13 were selected for the meta-analysis. In the forest plot representation of the studies evaluating infiltrations, the combined risk ratio (RR) was 1.88 (95% CI: 1.49, 2.37), in favor of the secondary infiltrations with a statistical heterogeneity of 77%. The forest plot analysis for studies comparing primary IANB + infiltration versus primary IANB alone showed a low heterogeneity (0%). The included studies had similar RRs and the combined RR was 1.84 (95% CI: 1.44, 2.34). These findings suggest that supplemental infiltrations given along with a primary IANB provide a better success rate. L'Abbe plots were generated to measure the statistical heterogeneity among the studies. Trial sequential analysis suggested that the number of patients included in the analysis was adequate. Based on the qualitative and quantitative analyses, we concluded that the infiltration technique, either as a primary injection or as a supplementary injection, given after the failure of primary IANB, increases the overall anesthetic efficacy.

• 대한치과교정학회지
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• 제23권2호
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• pp.165-177
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• 1993

Upper canine is important because it protects and maintains the stability of the dental arch and also, joins the anterior with the posterior teeth. The incidence of impaction of upper canine is the second most frequent next to the third molar because it takes a long period of time to develop, and has a complicated path of eruption, and erupts lately. After the age of 10, clinical and radioglaphic examination can be used in revealing the possibility of impaction and efforts should be put to reduce the side effects. To prevent impaction, selective extraction of primary canine at the age of 8 to 9 could be considered and prolonged retention of primary canine in oral cavity should be avoided at this time. Once the impaction is iden, the first stage of the treatment is to lcocalize the lesion by radiographic examination and According to the severity, orthodontic traction or autotransplantation should be considered and comprehensive diagnosis and treatment plan of malocclusion should be established. Generally, labial impaction is due to arch length discrepancy and palatal impaction is due to malposition or morphologic pathosis of lateral incisors rather than arch length discrepancy. In surgical procedure, peridontal problems should be considered and the minimum amount of bone and soft tissue should be reduced and direct bonding method of many attachment methods should be recommended. Especially in traction of labially impacted canine, it should be guided to erupt through the keratinized zone and proper forced magnitude should be applied. The importance of periodontal condition should always be in mind following the patient education to mintain the good oral hygiene at each stage of treatment. Properly managed impacted canine can provide function and esthetic by proper diagnosis and treatment if extraction of canine is not indicated.

• 한국치위생학회지
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• 제13권1호
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• pp.69-81
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• 2013

Objectives : The purpose of this study was to examine whether the subjective oral health awareness and oral health behavior of Korean adults would affect their oral health indexes. It's meant to utilize existing data of epidemiological and alternative indexes in an effort to have a comprehensive and understanding of the relationship between the subjective oral health awareness and oral health behavior of Korean adults. And the following findings were obtained Methods : The subjects in this study were 7,285 adults who were selected from the third-year(2009) raw data of the fourth national health & nutrition survey. Results : As for the relationship between oral health awareness and oral health indexes, there were statistically significant differences in DMFT index, FS-T index, T-health index and CPI index according to self-rated health status, self-rated oral health state, necessity of dental treatment and oral health concern. Concerning the relationship between oral health behavior and the oral health indexes, whether they got a dental checkup over the past year, daily toothbrushing frequency, use or nonuse of oral health supplies and mastication problems made statistically significant differences to DMFT index, FS-T index, T-health index and CPI index. The variables that had a significant impact on oral health were selected from among the variables of oral health awareness and oral health behavior that affected oral health, and the variables were selected as independent variables. And then the oral health indexes were selected as dependent variables, and a multiple regression analysis was carried out by using the selected independent and dependent variables. As a results, it's found that the variables made a 22.4% prediction of DMFT index; 51.3% for FS-T index; 52.0% for T-health index; 47.4% for CPI index. Conclusions : The above-mentioned findings illustrated that the relationship between the subjective oral health awareness and oral health behavior of the Korean adults exercised an influence on their oral health indexes. Accurate and effective oral health plans should be mapped out by grasping the oral health status of adults from diverse angles to facilitate the maintenance and promotion of their oral health status.

• Imaging Science in Dentistry
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• 제42권2호
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• pp.83-88
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• 2012

Purpose : The aim of this study was to investigate the initial effects of maxillary expansion therapy with Hyrax appliance and to evaluate the related changes in maxillary sinus volume. Materials and Methods : Thirty patients (20 females, 10 males; 13.8 years) requiring maxillary expansion therapy, as part of their comprehensive orthodontic treatment, were examined. Each patient had cone-beam computed tomography (CBCT) images taken before (T1) and after (T2) maxillary expansion therapy with a banded Hyrax appliance. Multiplanar slices were used to measure linear dimensions and palatal vault angle. Volumetric analysis was used to measure maxillary sinus volumes. Student t tests were used to compare the pre- and post-treatment measurements. Additionally, differences between two age groups were compared with Mann-Whitney U test. The level of significance was set at p=0.05. Results : Comparison of pre-treatment to post-treatment variables revealed significant changes in the transverse dimension related to both maxillary skeletal and dental structures and palatal vault angle, resulting in a widened palatal vault (p<0.05). Hard palate showed no significant movement in the vertical and anteroposterior planes. Nasal cavity width increased on a mean value of 0.93mm(SD=0.23, p<0.05). Maxillary sinus volume remained virtually stable. No significant age differences were observed in the sample. Conclusion : Hyrax expansion therapy did not have a significant impact on maxillary sinus volume.

• 치위생과학회지
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• 제13권1호
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• pp.36-44
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• 2013

본 연구는 치주질환을 조기에 발견하고 예방하기 위해 20대의 구강보건지식과 구강위생관리능력이 치주건강상태평가에 미치는 영향을 비교 분석함으로써 국민의 구강보건관심도를 높일 뿐 아니라 치주건강증진활동에 지식과 정보를 제공하여 건강하고 효율적인 구강관리를 하는 데 기초자료를 제공할 목적으로 조사되었다. 포괄 치위생 관리 및 처치를 위하여 치위생과 실습실을 방문한 20대의 성인 130명을 대상으로 설문조사를 실시하고, 치주건강상태를 평가하였다. 일반적 특성, 구강보건지식, 구강위생관리능력과 치주건강상태평가의 연관성을 조사 분석하여 다음과 같은 결과를 얻었다. 1. 성별에 따른 잇솔질(p=0.030)과 구강위생용품(p=0.047)에 대한 구강보건지식은 통계적으로 유의하였고, 여성이 구강보건에 대한 지식이 높게 나타났다. 2. 성별에 따른 잇솔질(p=0.030)과 구강위생용품(p=0.047)에 대한 구강보건지식은 통계적으로 유의하였고 여성이 구강건강에 대한 지식이 높게 나타났다. 3. 성별에 따른 유두변연부착 치은염지수(p=0.047)와 지역사회치주지수(p=0.028)는 통계적으로 유의하였다. 남자의 유두변연부착 치은염지수, 지역사회치주지수는 여자보다 높았다. 학력에 따른 출혈지수(p=0.042)는 통계적으로 유의하였고, 고졸 이하가 가장 높았다. 4. 잇솔질(p=0.030), 치주질환(p=0.024)에 대한 구강보건지식이 치면세균막지수에 미치는 영향이 통계적으로 유의하게 나타났다. 잇솔질에 대한 구강보건지식($\beta$=-0.137)이 증가하면 치면세균막지수가 감소하고, 치주질환에 대한 구강보건지식($\beta$=-0.144)이 증가하면 치면세균막지수가 감소한다. 5. 잇솔질 총 횟수에 따른 유두변연부착 치은염지수는 2회가 가장 높았다. 잇솔질 방법에 따른 치면세균막지수는 묘원법이 가장 높았으며, 횡마법, 회전법 순으로 나타났다. 구강위생용품을 사용하지 않는 경우의 지역사회치주지수와 출혈지수가 구강위생용품을 사용하는 경우보다 높았다. 흡연의 경우 유두변연부착 치은염지수, 지역사회치주지수, 출혈지수가 흡연을 하지 않는 경우보다 높았다. 주 당 음주 횟수에 따른 지역사회치주지수와 출혈지수는 3회 이상이 가장 높았다. 구강보건교육을 경험하지 못한 경우의 유두변연부착 치은염지수가 구강보건교육을 경험한 경우보다 높았다.

• Imaging Science in Dentistry
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• 제53권1호
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• pp.1-9
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• 2023

Purpose: The aim of this study was to evaluate 3-dimensional cone-beam computed tomography (CBCT) images of alveolar bone changes in patients who underwent minimally invasive periodontal surgery-namely, the pinhole surgical technique (PST). Materials and Methods: Alveolar bone height was measured and compared on CBCT images of 254 teeth from 23 consecutive patients with Miller class I, II, or III recession who had undergone PST. No patient with active periodontal disease was selected for surgery. Two different methods were used to assess the alveolar bone changes postoperatively. In both methods, the distance between the apex of the tooth and the mid-buccal alveolar crestal bone on pre- and post-surgical CBCT studies was measured. Results: An average alveolar bone gain >0.5 mm following PST was identified using CBCT(P=0.05). None of the demographic variables, including sex, age, and time since surgery, had any significant effect on bone gain during follow-up, which ranged from 8 months to 3 years. Conclusion: PST appears to be a promising treatment modality for recession that results in stable clinical outcomes and may lead to some level of resolution on the bone level. More long-term studies must be done to evaluate the impact of this novel technique on bone remodeling and to assess sustained bone levels within a larger study population.

• 대한소아치과학회지
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• 제44권3호
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• pp.370-377
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• 2017

Molar-incisor malformation (MIM)은 최근에 알려진 치아 이상으로 제1대구치의 치근 형태 이상이 특징적이며, 제2유구치의 비정형적 치근 형태 및 중절치의 법랑질 결함을 동반하기도 한다. 본 연구는 MIM으로 진단한 3명의 환아에 대하여 보고하고, 이에 관한 문헌 고찰을 하고자 한다. 3명의 환아 모두 제1대구치의 치근 형태 이상을 보였으며, 그 정도는 다양했다. 2명의 환아는 출생 시 의학적 병력을 가지고 있었으며, 한 명의 환아는 일란성 쌍둥이였다. 그러나 쌍둥이 동생의 임상 및 방사선학적 검사 결과 특별한 이상이 없는 정상 치열이었다. 본 연구는 최근에 보고되고 있는 MIM 증례에 관한 기술 및 방사선학적 관찰로, 해당 환아의 임상적 관리 시 이환 치아의 방사선학적 특성 및 미세해부학적 구조 및 수반하는 특성에 관한 고려는 조기 진단 및 포괄적 치료계획 수립에 도움이 될 것으로 생각된다.

• Imaging Science in Dentistry
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• 제49권1호
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• pp.59-63
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• 2019

Purpose: This study evaluated the prevalence and characteristics of maxillary antroliths using cone-beam computed tomography (CBCT) scans performed for maxillofacial diagnostic purposes. Materials and Methods: CBCT scans of 13,946 patients over the age of 20 were reviewed for maxillary antroliths, and prevalence according to sex, age, and the side of the jaw was calculated. The relationships of single or multiple antroliths with sex, side, and the degree of sinus inflammation were evaluated. The shape and dimension of antroliths were also assessed. The data were analyzed using descriptive statistics, the chi-square or Fisher exact tests, and Kendall's tau-b. Results: A total of 138 (0.99%) of the 13,946 patients showed an antrolith in at least 1 sinus. Only 18 patients presented a bilateral manifestation, which brought the total number of sinuses containing an antrolith to 156 (0.56%). Multiple antroliths were observed in 36 sinuses, and the total number of antroliths was 207: 110 punctate, 65 linear, and 32 amorphous. The antrolith dimensions varied from $1mm^2$ to $91mm^2$ (average, $10.2{\pm}15.5mm^2$). No statistically significant differences were found according to sex, side, and age group (P>0.05). However, there was a statistically significant difference between the multiplicity of antrolith and the degree of sinus inflammation (P<0.05). Conclusion: Cone-beam computed tomography is an effective modality for the detection of incidental antroliths. Maxillary antroliths were found to be very rare and were usually asymptomatic. Dentists should have a comprehensive understanding of their diagnosis and treatment in light of possible associated dental problems.