• 제목/요약/키워드: Upper incisors

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Guided endodontics: a case report of maxillary lateral incisors with multiple dens invaginatus

  • Ali, Afzal;Arslan, Hakan
    • Restorative Dentistry and Endodontics
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    • 제44권4호
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    • pp.38.1-38.8
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    • 2019
  • Navigation of the main root canal and dealing with a dens invaginatus (DI) is a challenging task in clinical practice. Recently, the guided endodontics technique has become an alternative method for accessing root canals, surgical cavities, and calcified root canals without causing iatrogenic damage to tissue. In this case report, the use of the guided endodontics technique for two maxillary lateral incisors with multiple DIs is described. A 16-year-old female patient was referred with the chief complaint of pain and discoloured upper front teeth. Based on clinical and radiographic findings, a diagnosis of pulp necrosis and chronic periapical abscess associated with double DI (Oehler's type II) was established for the upper left lateral maxillary incisor (tooth #22). Root canal treatment and the sealing of double DI with mineral trioxide aggregate was planned for tooth #22. For tooth #12 (Oehler's type II), preventive sealing of the DI was planned. Minimally invasive access to the double DI and the main root canal of tooth #22, and to the DI of tooth #12, was achieved using the guided endodontics technique. This technique can be a valuable tool because it reduces chair-time and, more importantly, the risk of iatrogenic damage to the tooth structure.

인중과 상.하악 치아의 중심선 관계에 대한 조사연구 (A Study of the Relationship of the Dental Midline to the Philtrum)

  • 이태정
    • 대한치과기공학회지
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    • 제6권1호
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    • pp.27-30
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    • 1984
  • This investigation was performed to study the relationship of the dental midline(an imaginary line between the centeal incisors) to the philtrum. 2,400 subjects with natural dentitions were examined. The group of the subjects was composed of 1,560 men and 840 women who had all of the upper and lower six anteriors and 0 to 4 missing teeth. Ages of the subjects ranged from 18 to 27 years. The obtained results were as follow: 1. The rates of the subjects whose philtrum and maxillary dental midline coincided was 64.92% and that of the subjects whose upper and lower dental midlines coincided was 29.17%and these rates are statistically significant, when compared respectively with those of the subjects whose philtrum and maxillary dental midline, and whose upper and lower dental midline's didn't coincide. 2. The difference between rates for the two sexes is not statistically significant. 3. Tooth missing significantly decreases the rates of the coincidence of the upper and lower dental midlines but its influence on the rates of coincidence of the dental midline to the philtrum is not significant.

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Orthopantomograph에 의(依)한 혼합치열상(混合齒列像)의 해석(解析)에 관(關)한 연구(硏究) (A STUDY ON AN INTERPRETATION OF THE ORTHOPANTOMOGRAPH IN THE MIXED DENTITION)

  • 김광원
    • 대한치과교정학회지
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    • 제12권2호
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    • pp.145-154
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    • 1982
  • Plaster models were constructed and orthopantomographs were taken for 86 male and 70 female primary school pupils, whose upper and lower permanent 4 incisors and 1st molars were completely erupted without crowding; whose deciduous canines and molars were found almost uniformly even without any visible tooth fractures, dental caries or restorations on proximal surfaces of the teeth. Certain reference points on the orthophantomograph were set up and measured and the values were compared with actual or predicted values from the models. The following results were obtained: 1. In regards to available space, the values from the orthopantomograph were greater than the values from the models by a mean of 3.24% on the upper and 10.06% on the lower for males; 3.05% on the upper and 10.01% on the lower for females. 2. In regards to total mesiodistal widths of permanent canine, 1st and 2nd premolars, the values from the orthopantomograph were greater than the presumed values based on the size of lower permanent 4 incisors from the models by a mean of 18.50% on the upper and 24.09% on the lower for males; 14.54 on the upper and 20.51% on the lower for females. 3. Comparing the magnified values of total mesiodistal widths of permanent canine, 1st and 2nd premolars with those of available space, the regression constants of regression equation (Y = a + bX) between them were a=3.2336, b=0.6533 on the upper and a=5.0138, b=0.3290 on the lower for males; a=2.5994, b=0.6521 on the upper and a=3.0113, b=0.6586 on the lower for females. 4. The correlation coefficients between the magnified values of available space and permanent canine, 1st and 2nd premolars were moderately positive as 0.6474 in the upper and 0.505 on the lower for males; 0.6493 on the upper and 0.6183 on the lower for females. 5. In regards to magnified values of the available space from the orthopantomographs there were no significant difference between sexes, (P>0.05) but of the total mesiodistal widths of permanent canine, 1st and 2nd premolars, a significant difference between sexes was found.(p<0.01).

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두부 방사선 계측 사진을 이용한 한국 아동의 상ㆍ하악골 성장에 관한 연구 (A LONGITUDINAL STUDY OF MAXILLO-MANDIBULAR BONE WITH CEPHALOMETRIC ANALYSIS IN KOREAN CHILDREN)

  • 유영규
    • 대한치과의사협회지
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    • 제19권2호통권141호
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    • pp.167-174
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    • 1981
  • The purpose of this study was observing the annual growth increment in cephalogram. The cephalograms of 29 boys & 23 girls were analized by method of Downs & Steiner, range from 7 to 8 years in Korean children. the results were as follows; 1. The craniofacial complex of Korean children grew downward and fordward. 2. The pronounced linear and angular growth changes were in the upper central incisors and lower central incisors. 3. The SN Plane to Mandibular plane angle was reduced. 4. The SNA and SNB was almost constant in male.

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Reverse Occlusion의 교정치험례 (A Case Report of Orthodontic Treatment of Reverse Occlusion)

  • 장영일;이병태;서정훈
    • 대한치과의사협회지
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    • 제17권5호통권120호
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    • pp.345-350
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    • 1979
  • The patient, 16 years female, complained of anterior cross-bite and retrusion of maxilla. Mandibular incisors occluded labially to maxillary incisors. Normally developed mandibular arch in normal elation to facial line, S-N-Pog was within normal range. Cross-bite of anterior teeth was corrected by means of Class III elastics under multibanded system. Space for alignment of crowding of upper anterior teeth was regained by means of cervical headgear and sliding yoke. She gained good alignment of anterior teeth and attractive facial profile after 2 years.

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Face-Mask를 이용한 골격성 III급 부정교합 환아의 치험례 (CASE REPORTS ON TREATMENT OF SKELETAL CLASS III MALOCCLUSION WITH FACE-MASK)

  • 양규호;이영준
    • 대한소아치과학회지
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    • 제23권3호
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    • pp.736-745
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    • 1996
  • The conventional treatment of skeletal Class III malocclusion has been focused on application of orthopedic force primarily to the mandible. However, In Class III malocclusion with retrograde position or underdevelopment of Maxilla, this approach is not suitable treatment. These patients need an application of orthopedic forces via face-mask to the Maxilla to stimulate its growth and to change the direction of growth. In skeletal Class III patients who were treated by Face-Mask, the following results were obtained. 1. Forward growth of Maxilla was enhanced. 2. Labioversion of upper incisors and linguoversion of lower incisors were observed. 3. Mandible was rotated to clockwise direction and remodeling of B point was observed. 4. Anterior crossbite was corrected by combining of the above results.

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치근단절제술에 의한 양측성측근양종 치험예 (A CASE REPORT OF THE BILATERAL PERIODONTAL CYSTS TREATED BY APICOECTOMY)

  • 남일우;권혁춘;정윤표;김수남;명동성
    • 대한치과의사협회지
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    • 제9권6호
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    • pp.281-283
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    • 1971
  • The bilateral periodontal cysts in the 36 years old korean male's upper both anterior regions between the central and lateral incisors have been observed. The authors have treated the bilateral periodontal cysts by means of the apicoectomies of the involved both central and lateral incisors.

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접착술식에 따른 전단강도 및 Bracket위치의 비교 (THE COMPARISON OF SHEAR STRENGTH AND BRACKET PLACEMENT BETWEEN BONDING TECHNIQUES)

  • 박윤경;국윤아;김상철
    • 대한치과교정학회지
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    • 제21권3호
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    • pp.513-520
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    • 1991
  • The purpose of this study was to compare the bracket placement and the shear bond strength of indirect-bonded brackets with those of direct-bonded ones. Forty eight extracted human teeth were collected and attached with brackets and tested on shear bond strength, using Instron. Fourteen patients from Wonkwang University Dental Hospital were selected for direct bonding of brackets and their teeth were measured on bracket angulation and bracket height. The obtained results were as follows: 1. The shear bond strengths of incisors were higher in direct-bonding,group, rather than in-direct-bonding group. But, the shear bond strength of premolars showed no significant differences between groups. 2. The bracket angulations of indirect-bonding group were preciser than those of direct-bonding group, especially in upper first premolars, lower lateral incisors, canines, premolars. 3. In bracket height, there were no significant differences between groups.

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기관 삽관을 시행한 조산아에서 발생한 상악 유전치의 발육이상 : 증례보고 (DEVELOPMENTAL DISTURBANCE OF PRIMARY INCISORS IN PRETERM INFANTS WITH ENDOTRACHEAL INTUBATION : A CASE REPORT)

  • 임소영;김성오;이제호;김익환
    • 대한장애인치과학회지
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    • 제15권1호
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    • pp.89-93
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    • 2019
  • 본 증례 보고는 기관 삽관 경험이 있는 조산아에서 상악 유전치의 발육장애가 나타난 증례이다. 본 증례들에서는 기관 삽관으로 인해 치관 형태 이상, 법랑질 결함, 맹출 지연이 나타났다. 또한 치배의 변위로 인한 맹출 경로 이상, 치근 만곡, 후속 영구치의 비정상적인 치근 형성도 나타났다. 이환 치아에 대해서는 예방적 수복치료 및 관리, 적절한 시기에 발치를 고려해야 한다. 소아치과의사는 삽관 경험이 있는 조산아에서 나타날 수 있는 상황에 대해 이해하고, 적절한 개입을 통해 구강 건강 증진을 도모해야 한다.

Evaluation of changes in the maxillary alveolar bone after incisor intrusion

  • Atik, Ezgi;Gorucu-Coskuner, Hande;Akarsu-Guven, Bengisu;Taner, Tulin
    • 대한치과교정학회지
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    • 제48권6호
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    • pp.367-376
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    • 2018
  • Objective: This study was performed to investigate the changes in alveolar bone after maxillary incisor intrusion and to determine the related factors in deep-bite patients. Methods: Fifty maxillary central incisors of 25 patients were evaluated retrospectively. The maxillary incisors in Group I (12 patients; mean age, $16.51{\pm}1.32years$) were intruded with a base-arch, while those in Group II (13 patients; mean age, $17.47{\pm}2.71years$) were intruded with miniscrews. Changes in the alveolar envelope were assessed using pre-intrusion and post-intrusion cone-beam computed tomography images. Labial, palatal, and total bone thicknesses were evaluated at the crestal (3 mm), midroot (6 mm), and apical (9 mm) levels. Buccal and palatal alveolar crestal height, buccal bone height, and the prevalence of dehiscence were evaluated. Two-way repeated measure ANOVA was used to determine the significance of the changes. Pearson's correlation coefficient analysis was performed to assess the relationship between dental and alveolar bone measurement changes. Results: Upper incisor inclination and intrusion changes were significantly greater in Group II than in Group I. With treatment, the alveolar bone thickness at the labial bone thickness (LBT, 3 and 6 mm) decreased significantly in Group II (p < 0.001) as compared to Group I. The LBT change at 3 mm was strongly and positively correlated with the amount of upper incisor intrusion (r = 0.539; p = 0.005). Conclusions: Change in the labial inclination and the amount of intrusion should be considered during upper incisor intrusion, as these factors increase the risk of alveolar bone loss.