• 제목/요약/키워드: Angle Class I malocclusion

검색결과 132건 처리시간 0.025초

Dilemma of gonial angle measurement: Panoramic radiograph or lateral cephalogram

  • Radhakrishnan, Pillai Devu;Varma, Nilambur Kovilakam Sapna;Ajith, Vallikat Velath
    • Imaging Science in Dentistry
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    • 제47권2호
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    • pp.93-97
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    • 2017
  • Purpose: The purpose of this study was to evaluate the accuracy of panoramic imaging in measuring the right and left gonial angles by comparing the measured angles with the angles determined using a lateral cephalogram of adult patients with class I malocclusion. Materials and Methods: The gonial angles of 50 class I malocclusion patients (25 males and 25 females; mean age: 23 years) were measured using both a lateral cephalogram and a panoramic radiograph. In the lateral cephalograms, the gonial angle was measured at the point of intersection of the ramus plane and the mandibular plane. In the panoramic radiographs, the gonial angle was measured by drawing a line tangent to the lower border of the mandible and another line tangent to the distal border of the ascending ramus and the condyle on both sides. The data obtained from both radiographs were statistically compared. Results: No statistically significant difference was observed between the gonial angle measured using the lateral cephalograms and that determined using the panoramic radiographs. Further, there was no statistically significant difference in the measured gonial angle with respect to gender. The results also showed a statistically insignificant difference in the mean of the right and the left gonial angles measured using the panoramic radiographs. Conclusion: As the gonial angle measurements using panoramic radiographs and lateral cephalograms showed no statistically significant difference, panoramic radiography can be considered in orthodontics for measuring the gonial angle without any interference due to superimposed images.

I급과 III급 부정교합을 보이는 어린이의 두개저의 성장변화에 관한 연구 (RELATIONSHIPS BETWEEN CRANIAL BASE AND FACIAL STRUCTURES IN CHILDREN WITH CLASS I AND III MALOCCLUSIONS AGED FROM 7 TO 12 YEARS : A CEPHALOMETRIC STUDY)

  • 이미숙;최영철
    • 대한소아치과학회지
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    • 제28권1호
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    • pp.95-105
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    • 2001
  • 두개저의 길이와 폭경 그리고 굴곡의 정도는 그 하부 구조물인 상악골을 포함한 비상악복합체 및 하악골의 길이와 폭경 그리고 전후방적 위치를 결정짓는 중요한 요인으로 역할하며, 이에 따른 안면골의 다양한 구조물들 간의 구조적 관계는 각기 다른유형의 부정교합관계를 형성하는 것으로 알려져 있다. 측두방사선 계측학에서 두개저의 열리고 닫힘을 표현하는 계측치로 흔히 사용되는 안장각(N-S-Ba, N-S-Ar) 또는 중두개저각$({\angle}MCF)$ 등과 I급과 III급 부정교합을 보이는 어린이들의 안면골 계측치 간의 구조적 관계를 평가하여 두개저의 굴곡정도가 안면골을 구정하는 각 구조물과 부정교합 유형과의 관계를 구명하고자 하였다. 이를 위하여 $7\sim12$세 사이의 I급과 III급 부정교합을 보이는 어린이의 측두 규격방사선사진(208매)을 계측하여 통계적으로 비교, 평가한 결과, 안장각보다는 중두개저각이 안면골의 구조과 부정교합의 유형과 밀접한 관계를 지니고 있으며, 특히 III금 부정교합 어린이의 중두개저각과 안면골의 각 구조물들은 $9\sim11$세 사이에 뚜렷한 변화를 나타내는 것으로 가늠된다.

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한국 젊은이의 안면미 선호경향에 관한 연구 : 얼굴의 측모평가를 중심으로 (A STUDY ON THE FACIAL ESTHETIC PREFERENCES AMONG KOREAN YOUTHS: ASSESSMENT OF PROFILE PREFERENCES)

  • 송세진;최익찬
    • 대한치과교정학회지
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    • 제22권4호
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    • pp.881-920
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    • 1992
  • This study was designed to assess profile preferences among Korean youths in the year 1992. Facial esthetics was evaluated by means of silhouette profiles, eliminating the influence of a number of aspects that may affect judgment when normal lateral photographs are used. The main points of preference to be clarified here are as follows. First, on facial convexity, Second, on nasion depth, Third, on mentolabial sulcus depth, Fourth, on the position of upper and lower lips, Fifth, on facial type according to Angle's classification of malocclusion, Sixth, on Song's tangents. The 54 subjects printed in questionnaire as black and white silhouettes were selected from 300 tracings from cephalometric radiographs of people whose age ranging from 11 to 20 years. Photographs of six female subjects were retouched by computer graphic software and printed in color and black/white photographs which were used for adaptation of eyes of participants in selecting profiles in silhouette. They constitute 2 questions. The 54 subjects were grouped as 22 questions, each of them composed of 6 subjects, according to the aspects to be clarified. Twenty four questions in total were asked to assess profile preferences. For the assessment, the profile line, the facial esthetic triangle, Song's tangents, and Angle's classification of malocclusion were introduced. The profile line is composed of 11 component points which are Trichion, Glabella, Nasion, Pronasale, Subnasale, Labrale superius, Stomion, Labrale inferius, Supramentale, Pogonion, and Gnathion. The facial esthetic triangle is composed of 3 tangents: A-tangent which is the tangent of dorsum of nose, B-tangent which is the line passing through Sn and Ls, and C-tangent which is drawn on the turning point of the curve which lies between mentolabial sulcus (Sm) and pogonion (Pg). Angle's classification has 3 types of malocclusion which are Class I, Class II, and Class III. Class II malocclusion is subdivided into Division 1 and Division 2. The participants of the survey were composed of 861 college students (448 male students, 413 female students) whose majors grouped as Fine Arts. Liberal Arts, and Natural Sciences, and whose mean age 21.8 years. The statistics program SPSS/PC + of SPSS Inc. was used to analyze answers of participants. Crosstabulation, Chi-square test, and Kendall test were done. The conclusions are as follows: First, Korean youths have a tendency to prefer the slightly convex face to the flat or concave face. Second, they prefer a moderately deep nasion. Third, they prefer a moderately deep mentolabial sulcus. Fourth, they prefer the position of lips which are near to Ricketts' E-line. The position of the upper lip which is slightly posterior to E-line is preferred. The upper lip which lies too far anterior or posterior to the lower lip is not perferred. Fifth, they prefer most, according to Angle's Classification of Malocclusion, Class I facial profile which has a slight inclination to Class II division 2. The order of preference is Class I, Class II division 2, Class III, and Class II division 1. Sixth, they prefer the type 2 and 3 of Song's tangents. The facial profile within which A-and B-tangent meet is preferred. The facial profile which has Cotangent that .meets with A-tangent slightly posterior to the crossing point of A-and B-tangent or that parallels with B-tangent is preferred.

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Bioprogressive Mechanism에 의한 Angle씨 II급 2류 부정교합의 치험례 (Angle's Class II Division 2 Malocclusion Treated by Bioprogressive Mechanism: Report of a Case)

  • 변상길;이희경;진병로;오명철
    • Journal of Yeungnam Medical Science
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    • 제4권1호
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    • pp.151-156
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    • 1987
  • 본 증례는 Angle씨(氏) 2급 2류 부정교합 환자로서 Bioprogressive Mechanism을 적용시켜 양호한 결과를 얻었기에 이에 보고하는 바이며 치료결과는 다음과 같다. 1) 주소인 상하악 전치부 crowding을 해소하였다. 2) 구치부 관계는 Angle씨(氏) classII에서 classI으로 개선되었다. 3) Overbite와 overjet를 기능적으로 해소시킴과 동시에 전치부 torque control에 의한 만족스러운 치축경사도로 개선시켰다.(Photo.5) 4) 치료기간은 1년 11개월이 소모되었다.

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An evaluation of the gingival biotype and the width of keratinized gingiva in the mandibular anterior region of individuals with different dental malocclusion groups and levels of crowding

  • Kaya, Yesim;Alkan, Ozer;Keskin, Siddik
    • 대한치과교정학회지
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    • 제47권3호
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    • pp.176-185
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    • 2017
  • Objective: To evaluate the relationship of gingival thickness (GT) and the width of keratinized gingiva (WKG) with different malocclusion groups and the level of crowding. Methods: A total of 187 periodontally healthy subjects (121 females and 66 males) who presented at the Faculty of Dentistry in $Y{\ddot{u}}z{\ddot{u}}nc{\ddot{u}}$ Yil University for orthodontic treatment were enrolled in the study. The individuals involved in the study were divided into three groups; Angle Class I malocclusion, Angle Class II malocclusion, and Angle Class III malocclusion. Each group was classified as mild, moderate, or severe according to the level of crowding. WKG was determined as the distance between the mucogingival junction and the free gingival margin. GT was determined by the transgingival probing technique. Factorial variance analysis and the Duncan multiple comparison test were employed to identify the extent to which a difference was apparent between the groups according to these parameters. Results: It was determined that teeth in the mandibular anterior region display the thin gingival biotype. WKG and GT were observed as being higher at the mandibular incisor teeth in the severe crowding group and at the mandibular canine teeth in the mild crowding group. The GT of the mandibular right central and lateral incisors was found to be thinner in the Angle Class III group. Conclusions: Within the limits of this study, the results demonstrate that, there is no significant relationship of WKG and the mean GT in the mandibular anterior region according to the Angle classification.

Angle씨 Ⅰ급 부정교합의 치험례 (A CASE REPORT OF ANGLE'S CLASS I MALOCCLUSION)

  • 김성남;최선웅;서정훈
    • 대한치과의사협회지
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    • 제13권12호
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    • pp.1135-1139
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    • 1975
  • A boy aged 13 years 5 months, had a Angle's clss I malocclusion characterized by severe anterior crowding. Molar relationship was neutroclusion, incisor overbite was 4mm, incisor overjet was 3mm. The patient underwent extraction of four first premolars and was treated with a multi-banded light force system. On the process of the orthodontic treatment, the teeth, obtained functional occlusion. The result of treatment was very satisfactory; color, vitality and mobility were normal, periodontal condition was good and the cosmetic result was excellent.

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서울시내에 거주하는 13세-15세 청소년들의 부정교합에 관한 역학적 연구 (PREVALENCE AND SEVERITY OF MALOCCLUSION IN CHILDREN 13 TO 15 YEARS OF AGE LIVING IN SEOUL)

  • 송경원;김진태
    • 대한소아치과학회지
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    • 제11권1호
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    • pp.121-130
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    • 1984
  • Childrens between the ages of 13 and 15 years, living in Seoul, were examined in order to determine the prevalence and severity of malocclusion in the permanent dentition. This survey encompassed 981 children and an individual chart was prepared for each subject recording an original HMAR score and classification of occlusion according to Angle. Also, subjective evaluation of "treatment needs" was carried out in 581 children. The results were as follows: 1. Of the 981 children in this survey, 12,1 percent showed excellent occlusion. (0 point) 2. The 14 percent of the children who had a score of 24 and above all appeared to belong to the "treatment highly desirable" or "treatment mandatory" category. 3. The incorporation of SAR (Supplementary Assessment Record) into the HMAR can provide more sensitive method for evaluating severity of malocclusion. 4. According to Angle's classification 77.4 percent of all malocclusion belonged to Class I, 1.3 percent to Class II, Division 1, 0.9 percent to Class II, Division 2, and 11.3 percent to Class III. 5. The mean HMAR score for Class I was significantly lower than for either Class II, Division 1 or Class III. (P < 0.05) 6. A close relationship was found between the degree of "treatment needs" and the value obtained by the HMAR scoring. (chi-square test, p < 0.05) The differences between the mean HMAR scores of the various subjectively defined categories were statistically significant. (P < 0.001)

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Angle씨 II급 1류 부정교합아동의 발음에 관한 음향학적 연구 (AN ACOUSTIC ANALYSIS OF PRONUNCIATION IN CHILDREN WITH ANGLE'S CLASS II DIV. 1 MALOCCLUSION)

  • 박윤정;이상훈;손동수
    • 대한소아치과학회지
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    • 제24권1호
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    • pp.95-111
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    • 1997
  • The human speech organ consists of respiration system (lung, larynx), phonation system (vocal cord), articulation system (esophagus, pharynx, uvula, teeth, gingiva, palate, tongue, lip) and resonating system(oral cavity, nasal cavity, paranasal sinus). Because teeth are components of the articulation system, it has been reported that the persons with abnormally positioned teeth generally have abnormal occlusion and pronunciation. In this study, using /ㅅ(s)/, the most commonly mispronunced consonant in children with malocclusion, and the seven single vowels, /사(sa), 서($s\delta$), 소(so), 수(su), 스($s\omega$), 시(si), 세(se)/ and / ㅏ(a), ㅓ($\delta$), ㅗ(o), ㅜ(u), ㅡ($\omega$), 1(i), ㅔ(e)/ were recorded and analyzed using speech analysis program on computer by measuring formants and compared them for investigating the differences in pronunciation in children with Angle's class I occlusions and those with Angle's class II div.1 malocclusion. The result were as follows: 1. In the Angle's Class II div.1 group, there were no significant differences in F1 of all recorded sounds as compared with Angle's Class I group(p>0.05). 2. In the consonants, there were significant differences in F2 of /스($s\omega$)/ and F2/F1 ratio of /사(sa), 서($s\delta$), 시(si)/ between the two group(p<0.05). 3. In the vowels, there were significant differences F2/F1 ratio of /ㅓ($\delta$)/(p<0.05) and no significant differences in F2/F1 ratio between two group(p>0.05). 4. In the consonants, there were significant differences in F2 and F2/F1 ratio when succeeding vowels were high or low, and F2/F1 ratio when front in accordance with tongue position (p<0.05). 5. In the vowels, there were no significant differences in formant in accordance with tongue position(p>0.05)

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악골형태에 따른 상하악절치위치에 관한 측모 두부방사선 계측학적 분석 (CEPHALOMETRIC ANALYSIS OF UPPER AND LOWER INCISORS IN DIFFERENTIAL FACIOSKELETAL PATTERN)

  • 김정호;권오원;김정민
    • 대한치과교정학회지
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    • 제22권3호
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    • pp.735-753
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    • 1992
  • 악골형태에 따른 상하악절치의 위치를 분석하기 위하여 18세 이상되는 정상교합자 60명과 II급 1류 부정교합자 40명, 그러고 III급 부정교합자 40명의 측모 두부방사선규격 사진을 설정한 계측점과 계측항목에 따라 분석하여 다음과 같은 결과를 얻었다. 저작계와 관련된 계측항목인 CI angle은 정상교합자군에서 $89.20{\pm}4.34^{\circ}$, II급 1류 부정교합자군에서 $81.68{\pm}5.95^{\circ}$, III급 부정교합자군에 $101.96{\pm}6.31^{\circ}$이었다. 상하악절치위치 계측항목의 악골형태별 비교에서 정상교합자군에 대한 II급 1류 부정교합군은 상악절치가 모든 계측항목에서 유의한 차를 보이며 순측경사져 있고(p<0.05), 하악절치도 ${\angle}LI-APog$, LI-APog(m), ${\angle}LI-AB$, LI-AB(mm)를 제외한 모든 계측항목에서 유의한 차이를 보이며 순측경사져 있었다(p<0.05). III급 부정교합자군은 상악절치가 ${\angle}UI-SN,\;{\angel}UI-OP$을 제외한 모든 계측항목에서 유의한 차를 보이며 순측경사져 있고 하악절치는 모든 항목에서 유의한 차이를 보이며 설측 경사져 있었다(p<0.05). 모든 악골형태에서 ${\angle}LI-SN,\;{\angel}LI-FH$가 악골계측항목과 비교적 상관성이 있었고, FMA가 하악절치위치계측항목과 비교적 상관성이 있었다. 악골형태에 상관없이 일정하게 적용할 수 있는 기준선은 상악절치 계측항목에서는 AB선, 하악절치 계측항목에서는 APog선이었다.

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청아치과병원 교정과에 내원한 환자의 분포와 부정교합분류에 관한 연구 (A Study On the Distribution of Malocclusion Patents From Department of Orthodontics, Chong-A Dental Hospital)

  • 김낭중;이태정
    • 대한치과기공학회지
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    • 제21권1호
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    • pp.131-138
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    • 1999
  • As a society has developed, much concern has been put on appearances of people with development of economy. Accordingly malocclusion patients have been increasing. With this trend, it has become very important to investigate patients characteristics so as to cure the patients effectively. This study investigated 724 malocclusion patients who had been examined diagmosed and recorded well at Chong-a Dental Hospital for 5 years from 1994 to 1998. The results are as follows ; 1) The total number of orthodontic patients in 1998 increased about 79% than in 1994, and female orthodontic patients(68.1%) were more than male ones(31.9%). 2) Age distribution has shown more than 19 year-old group being the largest(48.9%) 3) Distributions in the types of malocclusion according to the Angle's classification have shown 42.5% for class I division, 21.5% for class II division, 35.9% for class III division, being class I division the largest. 4) 50.1% of the total patients were from Kang-nam Gu, So-cho Gu, and Song-pa Gu.

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