18-24개월 시기에 경험하는 우식치와 탈회치에 영향을 미치는 요인

임순연 ( Soon Ryun Lim ),우희선 ( Hee Sun Woo ) 한국치위생과학회 2011 치위생과학회지 Vol.11 No.3

The present study seeks to find the effect of oral health status that parents recognized, oral health habit and food intake on existence of decalcified teeth and decayed teeth. Participants were 293 infants aged 18-24 months who visited C dental clinic in Kyungki province between January and December 2010. Questionnaires and oral exam results were used and statistically analyzed by the SPSS program. Fisher`s Exact and chi-square test were used to analyze the data. The 18-20 month-old age group had the highest rate of decalcified teeth with 36.4% while the 23-24 month-old age group had the highest rate of decayed teeth with 37.0%. Bottle feeding showed correlation with decalcified teeth, and decayed teeth. Parents were able to recognize decayed teeth and decalcified teeth. Group 2 food(soda/soft drinks/sugared fruit juice) was related to decalcified teeth and decayed teeth(p<.001). Group 4 food (cake/cookies/doughnut/dried fruit/banana) and group 5food(caramel/candy/chocolate bar) were both related to decalcified teeth(p<.001). As the result of dental examination, dental treatment was highly needed for the 21-22 month-old age group(89.3%), and preventive treatment and plaque control were highly needed for the 18-20 month-old age group(94.5%). The results concluded that 18-24 months was the critical period for children`s oral health, therefore organized oral health education for parents is necessary.

외상에 의한 영구치의 손상과 치아 고정술의 예후에 관한 연구

임현범,조용석,김경원 충북대학교 의과대학 충북대학교 의학연구소 1997 忠北醫大學術誌 Vol.7 No.1

경제 성장과 더불어 교통수단의 발달과 취미 활동에 대한 높은 관심과 함께 교통사고, 스포츠 등의 레저 활동, 폭력 등에 의하여 악안면부의 외상은 빈번하게 발생할 수 있다. 1996년 1월부터 1996년 12월까지 1년간 본과에 내원한 악안면부 외상 환자 중 상악골, 하악골, 관골 등의 악안면골 골절을 동반하지 않고 주로 치아 손상을 주소로 이에 대한 치아 고정술을 시행한 환자 43명에 대하여 의무 기록과 방사선 사진 등의 자료를 참고로 하여 영구치의 손상과 치아 고정술의 예후에 대하여 평가하여 다음과 같은 결론을 얻었기에 추후 영구치 손상 환자에 대한 치료술식과 예후 판정에 참고로 하고자 문헌 고찰과 함께 보고하는 바이다. 1. 치아 외상은 여자보다 남자에게서 더 많이 발생하였다. 2. 치아 외상을 받은 호발 연령은 10대와 20대였다 3. 치관 외상의 주된 원인은 낙상, 교통사고와 운동 순이었다. 4. 치아 외상시 가장 호발부위는 상악 전치부였다 5. 치아고정시 아치 바와 강선을 이용한 방법과 강선과 치과용 레진을 이용한 방법의 예후에는 큰 차이가 없었다. 6. 치아고정시 가장 큰 병발증은 치아 실활에 따른 신경치료, 치근 흡수, 발치였다. The injuries of the offal and maxillofacial region occrurred frequently because of the accidents, sports and violences. The authors experienced the injuries of the teeth that did not involve the bony fracture of the maxillofacial bones. We reviewed the 96 teeth of 43 patients that were fixed after replacement and/or replantation of luxated teeth during 1year(1996). We analysed and evaluated the treatment methods and the prognosis of the fixated teeth using the hospital records and radiographies. The results were as follows. 1. The occurrences of teeth injuries were more frequent in male than in female 2. The prevalent age groups were the second and third decades. 3. The major etiologies of teeth injuries were fall-down, traffic accidents and sports. 4. The prevalent teeth injured area were the upper anterior teeth area. 5. The prognosis of the teeth fixation methods between arch bar with wiring and wire with dental resin were not different significantly. 6. The major complications were the endodontic treatment due to discoloration and/or non-vitalization of teeth, root resorption and extraction of injured teeth.

소아에서의 shell teeth의 치험례 : A CASE REPORT

박인호,윤정훈,이난영,이창섭,이상호 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.1

Shell teeth는 매우 드문 상아질 이상으로 상아질 이형성증의 한 형태로서 특징적으로 정상적인 법랑질, 매우 얇은 상아질, 비정상적으로 큰 치수강, 짧아진 치근 등을 보인다. Shell teeth는 1954년 Rushton이 21세 남자 환자에서 나타난 증상을 설명하여 처음 명명하였으며, 1984년 Kinirons이 8세 남아의 shell teeth에 대해 보고하였다. 1992년 Harrison과 Kennedy는 7세 6개월 된 남아에서 보인 shell teeth를 14년간 관찰하여 보고하였는데 이 환아는 유치열과 영구치열 모두 shell teeth가 관찰되었고, 일반적인 shell teeth와 달리 치관에서는 shell teeth의 특징이 나타나지 않았으며, 치근에서만 나타났다. 매우 얇은 상아질과 큰 치수강은 국소적 이형성증에도 관찰되는 특징인데, shell teeth는 전치열에서 보이는데 반해 국소적 이형성증은 한정된 몇 개의 치아에서만 관찰되어 감별진단 할 수 있다. 본 증례는 3세 남아에 관한 것으로 구강내 소견은 모든 유치 치관이 파괴되어 상아질이 노출되어 있었고, 방사선 소견은 얇은 상아질로 둘러싸인 매우 큰 치수강과 확장된 치근관을 보였으며 다수의 소구치가 결손되어 있었다. 환아는 행동조절의 문제 때문에 전신마취하에 치료를 받았다. 현재 환아는 공간유지장치를 장착하고 있으며, 정기적인 관찰이 필요하리라 사료된다. Shell teeth, a rare dysplastic condition of dentin, was first described by Rushton in 1954. It is characterized by normal enamel, extremely thin dentin, correspondingly large pulp chambers, and shortened roots. This case report is of a male 3 years old. He is refered to the Chosun University dental hospital Pediatric Dentistry because of dental caries and dentin hypoplasia. Intra-oral examination showed attrition of all primary teeth. Radiographic examination showed that the pulps were extremely large with only a shell of surrounding hard tissue. The permanent premolars were missed congenitally. The diagnosis was shell teeth. Because of behavior problem, all dental treatment was undertaken with general anaesthesia. Extration, endodontic treatment and SS crown were performed. The patient has now been wearing the space maintainer and manages it well. The patient is seen intervals for supervision and follow-up care.

구순-구개열 환아에 발생한 신생아치의 증례 보고

한만욱,이종건 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

The teeth present at birth are called natal teeth, while the teeth that appear within the first thirty days following birth are called neonatal teeth. Approximately one in 2,000 to 3,500 infants experiences the eruption of teeth at birth or within the first few weeks postpartum. Many contributing factors have been suggested for the premature eruption of primary teeth. It has been suggested that upon eruption these teeth are of normal structure according to their developmental age, but after eruption, lateral movement in the cervical area leads to disturbance of the dentin and premature degeneration of Hertwig's root sheath. In most cases, they have immature, aborted structures consisting only of caps of enamel, dentin, or a combination of both. A radiograph can show the presence or absence of enamel, dentin, or root structures, as well as supernumerary teeth. These teeth may be aspirated or swallowed during feeding. Discomfort from mobile and erupting teeth often causes the infant to refuse to feed. In addition, a nursing mother's nipples may become lacerated and infected. Extraction is the indicated treatment if these neonatal teeth cause discomfort or demonstrate mobility or incomplete, immature development. Treatment decisions must be made on an individual basis from both clinical and radiographic findings. We report four cases of neonatal teeth in complete cleft lip and palate patients.

Estimating age using nationwide survey data on the number of residual teeth

김의주,이원준,서인수,김형건,류혜원,이주헌,서요섭,노병윤 대한법의학회 2022 대한법의학회지 Vol.46 No.3

Given that tooth loss is a degenerative change, the number of residual teeth may be used to specify a particular age range as a marker for age estimation. This study examined changes in the number of teeth with age using a nationwide oral survey database and derived the age distribution of the Korean population according to the number of teeth. Data on the number of teeth and age were extracted from the oral examination data of the Korean National Health and Nutrition Examination Survey (KNHANES) from 2016 to 2018. Statistical analyses of a complex sample survey were performed using weighted values. The distribution range of the number of teeth by age was broad. The proportion of young people decreased progressively as the number of remaining teeth decreased. In contrast, the proportion of those from the older age group decreased slightly as the number of teeth increased. The number of teeth was subdivided into groups of four, age was categorized into 5-year intervals, and the distribution of age groups by the number of teeth was analyzed. We attempted to determine the age group threshold at approximately 95th percentile for age. In summary, we found that if there were ≤4, 5-12, and 13-20 residual teeth, the estimated age was ≥60, ≥55, and ≥50 years, respectively, with an approximately 95% probability. When many teeth are lost and it is difficult to apply conventional dental age estimation methods, our method may assist in narrowing the age range, although it is not an accurate age determination method.

의치용 레진치와 수복용 복합레진 간의 결합강도에 관한 연구

김미리,정창모,전영찬,임장섭,Kim, Mee-Lee,Jeong, Chang-Mo,Jeon, Young-Chan,Lim, Jang-Seop 대한치과보철학회 2002 대한치과보철학회지 Vol.40 No.2

This study investigated the shear bond strengths between abrasion-resistant denture teeth and composite resins according to surface treatments. Denture teeth for this study were Trubyte IPN teeth(Dentsply Inc., USA) with interpenetrating polymer network and Endura Posterio (Shofu Inc. Japan) of composite resin teeth, and restorative composite resins were Clearfil FII (Kuraray, Japan) of the self-cured composite resin and Z100(3M Dental Product, USA) of the light-cured composite resin. Five different surface treatments were evaluated: (1) $50{\mu}m\;A1_2O_3$ sandblasting: (2) #100 carbide paper; (3) chloroform; (4) retentive holes; and (5) no treatment. After surface treatments, denture teeth were examined by scanning electron microscopy(SEM), and the maximum shear bond strengths between abrasion-resistant denture teeth and composite resins were measured using Instron. The results were as follows; 1. IPN teeth treated with sandblasting had the highest shear bond strength, and Endura treated with sandblasting and carbide paper had significantly greater shear bond strength than with any other surface treatment. 2. Regardless or composite resins, the shear bond strength on Endura was greater than on IPN teeth. 3. Regardless of denture teeth, the shear bond strength of Clearfil FII was greater han of Z100. 4. In appearance of SEM, IPN teeth treated with sandblasting showed generalized roughness on the all of surface, however, carbide paper treatment resulted in partly rough. Endura treated with sandblasting and carbide paper showed similar surface characteristics. Wetting denture teeth surface with chloroform removed the debris and created a particle-free and smooth surface.

A study of fracture loads and fracture characteristics of teeth

Sheen, Chang-Yong,Dong, Jin-Keun,Brantley, William Arthur,Han, David Seungho The Korean Academy of Prosthodonitics 2019 The Journal of Advanced Prosthodontics Vol.11 No.3

PURPOSE. The purpose of this in vitro study was to investigate the fracture loads and modes of failure for the full range of natural teeth under simulated occlusal loading. MATERIALS AND METHODS. One hundred and forty natural teeth were taken from mandibles and maxillas of patients. There were 14 groups of teeth with 10 teeth in each group (5 males and 5 females). Each specimen was embedded in resin and mounted on a positioning jig, with the long axis of the tooth at an inclined angle of 30 degrees. A universal testing machine was used to measure the compression load at which fracture of the tooth specimen occurred; loads were applied on the incisal edge and/or functional cusp. RESULTS. The mean fracture load for the mandibular first premolar was the highest (2002 N) of all the types of teeth, while the mean fracture load for the maxillary first premolar was the lowest (525 N). Mean fracture loads for the mandibular and maxillary incisors, and the first and second maxillary premolars, had significantly lower values compared to the other types of teeth. The mean fracture load for the teeth from males was significantly greater than that for the teeth from females. There was an inverse relationship between age and mean fracture load, in which older teeth had lower fracture loads compared to younger teeth. CONCLUSION. The mean fracture loads for natural teeth were significantly different, with dependence on tooth position and the sex and age of the individual.

유치와 영구치의 외상에 관한 연구

이미라 ( Mi Ra Lee ),지민경 ( Min Gyeong Ji ),민희홍 ( Hee Hong Min ) 한국치위생학회 2011 한국치위생학회지 Vol.11 No.1

Objectives : The writer aimed to examine the dynamic aspect on damage and to be conducive to the swift cure according to right treatment to educate prevention of injury through surveying on the number of the damaged teeth given injury, tooth kind, type in damage, place and cause for being damaged, frequency by month and by time level, and location of the damaged tooth. Methods : Targeting 343 teeth of receiving injury in 201 patients who visited the department of pediatric dentistry, the department of preservation, and the oral and maxillofacial surgery in a dental hospital in Cheonan city from April 2007 to April 2009, by having the dental injury as the main reason, the following conclusions were obtained. Results : 1. Deciduous teeth were indicated to be the highest in imperfect luxation with 60.7%, and were indicated to be in order of crown fracture with 25.5%, root fracture with 12.4%, and perfect luxation with 1.4%. The permanent teeth were indicated to be the highest in crown with 58.1%, and were indicated to be in order of imperfect luxation with 27.3%, root fracture with 13.1%, and perfect luxation with 1.5%(p<0.001). 2. In case of deciduous teeth for a place with damage, the home was indicated to be the highest with 31.7%. The permanent teeth were indicated to be the highest(p<0.001) in the road and stairs with 40.4%. As to a cause for damage, both deciduous and permanent teeth were indicated to be the highest(p<0.001) in a cause for falling with 53.1% and 30.8%, respectively. 3. As for a treatment method, in case of deciduous teeth, the close observation was indicated to be the highest with 46.9%. In permanent teeth, the resin restoration was indicated to be the highest(p<0.001) with 22.2%. Dental injuries in deciduous teeth and permanent teeth are showing diverse aspects. Conclusions : It is important to arrange guidelines on cure of the damaged teeth by injury through continuing a dynamic research on these aspects. Also, the damage in deciduous teeth may have direct and indirect influence upon growth in successional permanent teeth. Thus, through careful treatment, the injury needs to be minimized. It is considered to be likely necessary for a right coping method when injury occurs, and above all, for enough prior education so that injury cannot occur.

유아 구강건강실태 및 요인연구

김지화,김영선 한국위생과학회 2002 한국위생과학회지 Vol.8 No.2

Below result was acquired by the survey from 31th May.2002 to 12th June, 2002. Three kindergartens, in Pohang city were selected for the survey and 247 children replied. The purpose of survey was finding the effective way to improve children's dental disease prevention and oral health. Below conclusion was from analysis about the relationship between children's ordinary behavior about oral health, oral health education and decayed deciduous teeth. 1. The higher children's age The higher decayed and filled deciduous teeth index.(P<0.01) 2. As mother age goes older decayed deciduous teeth index, decayed and filled deciduous teeth index, decayed and filled deciduous teeth surfaces index go higher. When mother has job, decayed and filled deciduous teeth surfaces index shows 6.75.(P<0.01) 3. When children has many snacks and has experiences of preventive oral health care and call on dental clinic, decayed deciduous teeth index, filled deciduous teeth index, decayed and filled deciduous teeth index, decayed and filled deciduous teeth surfaces index shows high result.(P<0.01) 4. When mother knows about oral plaque, children's decayed deciduous teeth index shows low.(P<0.01) 5. When the education about the importance of teeth is conducted more, decayed deciduous teeth index, decayed and filled deciduous teeth index, decayed and filled deciduous teeth surfaces index of children whose mother has experience of oral health education shows low result.(P<0.01)

선천성 결손치에 관한 임상적 연구

정해경,양연미,김재곤,백병주,정진우,김하나,김미아 大韓小兒齒科學會 2009 大韓小兒齒科學會誌 Vol.36 No.2

The congenital missing of teeth is common, which takes place since the proliferation and differentiation are not allowed in that tooth bud fail to start development. The purpose of this study is to research incidence rate, number, and missing part of congenital missing teeth, and to study whether a person who has missing teeth has other abnormality of teeth or not. For this study, 1,520 subjects(aged 2.9~17) who had visited pediatric dentist department of Chonbuk national university dental hospital within 2 years were examined with an panoramic radiograph ; exempting third molar missing state. The obtained results are as follows. 1. 8.88% among total subjects show missing teeth ; male 9.05%, female 8.64% 2. The most frequently missing permanent teeth were the mandibular second premolars(22.3%). The most frequently missing primary teeth are mandibular lateral incisors(50%). 3. 43.3% patients have one permanent missing tooth, 34.3% have two, and 10.4% have more than six, respectively. In primary teeth, 86.7% patients have one missing tooth, and 13.3% have two missing teeth. 4. 18 patients(13.3%) have missing teeth as well as hyperdontia, while some patients have microdont, ectopic eruption, and fusion teeth. 치아의 선천성 결손은 치배의 발육이 시작되지 못하여 치아의 증식, 분화가 일어나지 못함으로서 발생하는 흔한 치아의 발육 이상이다. 이 연구의 목적은 선천성 결손치의 발생률, 결손치의 수, 발생부위와 결손치 환자에게서 나타난 다른 치아이상의 발생여부를 조사하는 것이다. 본 연구는 2006년 7월부터 2008년 6월까지 전북대학교 소아치과에 내원하여 파노라마를 촬영한 1,520명의 환자(2.9~17세)를 대상으로 제 3 대구치를 제외한 선천성 결손치의 분포를 조사하여 다음과 같은 결과를 얻었다. 1. 전체 1,520명 중 총 8.88%에서 결손치가 관찰되었으며, 남자가 9.05%, 여자가 8.64%에서 결손치가 관찰되었다. 2. 총 350개의 영구 결손치 중 하악 제 2 소구치가 22.3%로 가장 발생률이 높았고, 하악 측절치, 상악 제 2 소구치, 하악 중절치, 상악 측절치 순이었다. 또한 총 18개의 유치 결손치 중 하악 유측절치가 가장 높은 발생률(50%)을 보였다. 3. 1개의 영구치 결손치를 가지는 환자는 43.3%, 2개는 34.3%, 3개는 6,7%, 4개는 1.5%, 5개는 3.7%, 6개 이상은 10.4%이었다. 또한 유치 결손치의 수는 1개는 86.7%, 2개는 13.3%이었다. 4. 결손치가 있는 환자 중 과잉치를 가지는 환자는 18명(13.3%)이 있었으며, 왜소치, 이소맹출, 융합치 등의 치아이상을 지닌 환자도 관찰되었다.