• 대한치과의사협회지
• /
• 제22권10호통권185호
• /
• pp.869-877
• /
• 1984

An objective examination of 123 subjects aged from 19 to 23 was made from a clinical standpoints to determine the natural occurrence in anterior tooth contact in centric occlusion, and tooth contact in protrusive occlusion, left and right lateral excursions, and temporomandibular dysfunction. 1. In centric occlusion, maxillary 6 anterior contact type was frequently observe (30.08%) compared with other types of contact (incisor contact: 19.47%, no contact: 17.70%, canine and incisor contact: 15.04%, canines contact: 12.39%, unilateral canine contact: 5.31%) (P<0.01) 2. In protrusive position (edge to edge bite), maxillary central incisors contact was predominant (86.7%). (P<0.01) 3. In lateral excursion, there was not any significant difference between canine guided occlusion (47.79%) and group function occlusion (total 51.32%, AG:9.29%, PG:13.27%, G:28.76%). 4. Temporomandibular joint dysfunction was observed in 12.4% of 123 subjects.

• 대한치과의사협회지
• /
• 제48권10호
• /
• pp.754-761
• /
• 2010

Horizontal root fractures are defined as those that involve cementum, dentin and pulp, comprising from 0.5 to 7% of injuries in permanent dentition on dental trauma. Diagnosis is made through clinical findings and radiographic exams, the latter frequently being limited by the position of the fracture line. Treatment varies according to the displacement of crown portion and vitality of the fragments. Authors describe clinical cases of maxillary right central incisor with horizontal root fractures in dental clinic, Jeju National University Hospital.

• 대한치과의사협회지
• /
• 제52권5호
• /
• pp.264-272
• /
• 2014

Maxillary canine is the most common impacted tooth except third molars. In Asian populations, labial impaction is more common than palatal impaction, but palatal impaction is three times more common than labial impaction in Caucasion. The incidence of maxillary canine impaction is known as 1~3%, and 12% of these cases are involved in the root resorption of the adjacent lateral incisor. In children, early diagnosis is important to prevent the impaction of maxillary canine through clinical and radiographic examinations. In addition, preventive measures should be considered at the proper time. These measures include the removal of deciduous canines and the expansion of the maxillary arch.

• 대한치주과학회:학술대회논문집
• /
• 대한치주과학회 2009년도 춘계학술대회
• /
• pp.39-39
• /
• 2009

• 대한소아치과학회지
• /
• 제21권2호
• /
• pp.510-517
• /
• 1994

It is a relatively common clinical experience to see a impacted maxillary central incisor. This is apparent at the dental age of about eight years and over, when the patient is in the early mixed dentition stage. The adjacent teeth may tilt toward the site of the missing tooth with resulting space closure and midline deviation. Most often, the central incisor is impacted labially. The labial impaction has been indicated as the most difficult to manage. Each of the current articles describing labial impactions shows at least one case with mucogingival recession or a minimal zone of attached gingiva. This report described the surgical uncovering and orthodontic-physiologic positioning methods with labially impacted maxillary central incisors. Through surgical exposure and direct bonding of lingual botton, the central incisors were brought into proper eruption path with elastic traction. The case 1 and 2 were treated with the physiologic erupting forces. The case 3 was applied with continuous orthodontic force. The case 1 and 2 resulted in good positioning, good esthetics and adequate width of keratinised gingiva. The case 3 resulted in local inflammation and inadequate width of keratinised gingiva.

• Journal of Periodontal and Implant Science
• /
• 제30권2호
• /
• pp.483-490
• /
• 2000

The aim of this study was to analyze the reliability of an ultrasonic device(SDM) measuring soft tissue thickness in relation to tooth position, and to find factors which can influence the reliability. The results showed that 1. measurement error was the largest in the maxillary second molar position and the smallest in the mandibular central incisor position. 2. in a box whisker plot, the difference between two measurements was most widely distributed in molar positions. 3. in Pearson correlation analysis, the relationship between two measurements was the highest in the maxillary lateral incisor position and, the lowest in the maxillary second molar, mandibular first and second premolar position. 4. a stepwise multiple regression analysis could explain the difference of two measurements with various independent variables in 29.7% (P<0.0001). Gingival thickness was the only variable influencing the measurement difference in a statistically significant level(P<0.0001). It can be concluded that its high reliability, ease to use and patient comfort justified the application of the SDM in measurement of soft tissue thickness.

• 대한치과교정학회지
• /
• 제4권1호
• /
• pp.57-61
• /
• 1974

The patient, a girl of 19 years in good health, had a class I malocclusion. The maxillary left centra1 incisors and both lateral incisors had already erupted. But the space for the right central incisor was partially closed by the mesial drifting of the neighboring teeth. The caused a shift in the midline and a cross-bite relation on the incisors. X-ray examination revealed the presence of the right central incisor in the alveolar bone and odontoma just above the crown of the right central incisor. After enough space for the impacted incisor was created in the dental arch with a open-coil spring the rectangular incision was made. Removing the odontoma uncovered the flat surface of the labial aspect of the incisor. During the tooth had erupted of its own accord, any unnecessary force had been imposed on the tooth. When it was decided that the tooth should be brought out by the mechanical device, the gold cast onlay with hook was used and run a light elastic between this hook and the main arch wire. Finally the tooth was brought down to the arch level. The result was excellent. Fortunately the esthetic problem and any detrimental effects on the psychological make-up could be avoided.

• 대한치과의사협회지
• /
• 제13권10호
• /
• pp.929-933
• /
• 1975

A girl aged 15 years 6 months, had a class Ⅲ malocclusion characterized by severe maxillary anterior crowding and a retarded maxilla. Molar relationship was class Ⅲ on both sides, incisor overjet was - 2.9mm. and incisor overbite was 5.5mm. The patient underwent extraction of four first premolars and was trested with a multi-banded light force system. After 13 months, the patient gained a normal verbite-overjet relationship of anterior teeth and a class 1 molar relationship. Superimposition of pretreatment and posttreatment cephalograms upon the line SN registered at S showed backward downward rotation of the mandible.

• 대한치과보철학회지
• /
• 제53권4호
• /
• pp.310-317
• /
• 2015

목적: 한국 성인 유치악자를 대상으로 치아와 안모 사이의 크기 및 형태적인 상관관계, 구강 내 해부학적 기준점들과 치아배치 양상 사이의 관계를 조사하여 총의치 제작 시 무치악 환자 치료에 사용되는 기준점들의 효용성을 평가하고자 하였다. 대상 및 방법: 서울대학교 치의학 대학원생을 대상으로 상악 6전치가 정상적으로 배열되어 있는 성인 남성 270명 여성 280명을 선정하여 연구를 수행하였다. 악안면부의 해부학적 구조를 크게 변화시킬 수 있는 외과적 치료를 받은 경우, 교정치료를 받은 경우, 선천적으로 상악 전치부 치아 형태 및 수에 이상이 있는 경우, 상악 전치부 치관의 변형을 초래할 수 있는 수복치료를 받은 경우는 연구대상에서 제외하였다. 연구항목은 안모의 외형, 협골궁 폭경, 안모의 길이, 상악중절치의 형태 및 장경, 상악6전치의 치관 폭경, 견치간 거리, 절치유두 중심에서 중절치 순면까지의 거리, 절치유두 중심에서 양견치 첨단을 지나는 선까지의 수직거리이었다. 이를 바탕으로 안면계측항목과 모형계측항목간의 비율 및 상관관계를 통계적으로 분석하였다. 결과: 본 연구의 한계 내에서 다음과 같은 결과를 얻었다. 1) 안모의 외형과 상악 중절치의 형태가 일치하는 비율은 남성 55.56%, 여성 46.43%, 전체 50.91%이었다. 1) 협골궁 폭경과 상악중절치 폭경, 상악6전치 연합폭경의 비율은 각각 16.8 : 1, 3.0 : 1이며 통계적으로 양의 상관관계가 있었다. 2) 상모학상 안모의 길이(Trichion-Gnathion)와 상악중절치 치관 장경, 코뿌리점-턱끝융기점간 거리(Nasion-Gnathion)와 상악중절치 장경과의 비율은 각각 19.7 : 1, 11.6 : 1이었고 남성에서는 코뿌리점-턱끝융기점간 거리가, 여성에서는 안모의 길이가 더 큰 상관관계가 있었다. 3) 절치유두 중심과 양 견치첨단을 연결하는 선 사이의 수직거리는 $1.33{\pm}1.08mm$이었다. 4) 절치유두 중심에서 중절치 순면까지의 거리는 $9.23{\pm}1.20mm$이었다. 결론: 총의치 제작에 사용되는 기준점들은 한국 성인 유치악자의 경우에도 통계적으로 효용성을 가지며, 중요한 해부학적 지표가 임상적으로 의미를 가진다고 할 수 있다. 그러나 통계적으로 수치에서 차이를 보이고 개별적인 편차를 가지므로 인공치아의 선택이나 배열 후 환자의 동의를 받는 과정이 필수적이라고 할 수 있다.

• 대한치과보철학회지
• /
• 제33권4호
• /
• pp.753-768
• /
• 1995

For accurate impression taking of dental patient and esthetic denture treatment of ednetulous patient, measuring between intraoral anatomic landmarks is useful.In this study the subjects selected at a random were two-jundred forty persons with a mean age 22.5(range 21-24) and were taken impression of by irreversible hydrocolloid impression material(Alginate). On the study model made by dental stone, each individual tray was made and final impresion was taken by border moilding. On final model measurings were performed with 3-dimensional measuring device and the values were analyzed by t-test The results is following : ABOUT THE MEASURED VALUES. 1. The width between maxillary right and left canine cusp tip was average 36.44mm(s.d. 2.48), man 36.67mm, woman 35.83mm(p<0.05). 2. The width between labial height of contour of maxillary right and left canine was average 40.08mm(s.d. 2.42), man 40.29mm, woman 39.52mm(p<0.05). 3. The width between mesio-lingual cusps of maxillary first molar was average 43.14mm(s.d. 3.33), man 43.56mm, woman 42.05mm(p<0.05). 4. The width between buccal alveolar ridge on axis of mesiolingual cusp of right and left maxillary first molar was average 64.89mm(s.d. 3.88), man 65.58mm, woman 62.92mm(p<0.05). 5. The width between buccal alveolar ridge on axis of mesiolingual cusp of right and left maxillary second molar was average 68.58mm(s.d. 3.91), man 69.29mm, woman 66.30mm (p<0.05). 6. The width between right and left hamular notch was average 49.80mm(s.d. 3.96), man 50.70mm, woman 48.20mm(p<0.05). 7. The length from labial heigth of contour of maxillary central incisor to center of incisive papilla was average 9.52mm(s.d. 1.18), man 9.46mm, woman 9.63mm(p>0.05). 8. The length from labial heigth of contour of maxillary central incisor to palatine fovea was average 53.27mm(s.d. 2.93), man 53.93mm, woman 52.08mm(p<0.05). 9. The center of incisive papilla ws located posterior to intercanine line at 0.40mm(s.d. 1.16), man 0.51mm, woman 0.11mm(p<0.05). 10. The height from incisal edge of maxillary central incisor to the labial vestibule was average 21.84mm(s.d. 1.38), man 22.01mm, woman 21.00mm(p<0.05). 11. The height from mesiolingual cusp of maxillary first molar to buccalvestible was average 17.45mm(s.d. 1.42), man 17.56mm, woman 17.08mm(p>0.05). 12. The height from hamular notch to standard occlusal plane was average 6.84mm(s.d. 1.06), man 6.91mm, woman 6.70mm(p>0.05). 13. The height from the deepest point of palatal vault to standard occlsalplane was average 19.95 mm(s.d. 2.03), man 20.19mm, woman 19.12mm(p<0.05). ABOUT THE ARCH FORM 1. The arch form was able to classify into four typr by the rate of the measured values. Each arch form distribution was that the 1 group had 32.46% the 2 group 2.19%, the 3 group 52.83%, the 4 group 12.72%. The sexual composition was that in 1 group man had 73.5%, woman 26.5%, in 2 group man had 40.0%, woman 60.0%, in 3 group man had 83.3%, woman 16.7%, and in 4 group man had 55.17%, woman 44.83%. 2. When canine cusp tip was marked as point O, the intersection point between labial height of contour of maxillary central incisor and intermaxillary suture as point A, height of contour of maxillary second molar buccal alveolar ridge as B point, ${\angle}$AOB was measured $133.8^{\circ}$for the 1 group, $133.0^{\circ}$for the 2 group, $132.3^{\circ}$for the 3 group, $128.9^{\circ}$for the 4 group.