• 대한치과교정학회지
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• 제14권2호
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• pp.263-272
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• 1984

This study was undertaken to examine the extent to which tooth size and jaw size each contribute to dental crowding. Two groups of dental casts were selected on the basis of dental crowding. One group, consisting of 94 pairs of dental casts (46 males and 48 females) with normal occlusion. A second group, consisting of 84 pairs of dental casts (98 males and 46 females) with crowding. The results were as follows. 1. Means and standard deviations of the two groups were used to compare the two groups. 2. Significant differences were observed between two groups on the basis of tooth size, arch dimension and arch perimeter. 3. Between noncrowded group and crowded group, was crowded group was found to have large troth size than noncrowded group, while smaller arch dimension and perimeter. 4. Significant differences were observed between males and females on the basis of tooth size, arch dimension and arch perimeter. 5. Author found ideal arch shape of normal occlusion.

• 한국치위생학회지
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• 제20권1호
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• pp.11-18
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• 2020

Objectives: We analyzed the correlation between physique and size of the dental arch of college students with normal occlusion. Methods: Ninety-nine college students filled out the prepared questionnaire. The length and width of the dental arch of the students was measured using a plaster model after taking an impression. The data were analyzed using the t-test and correlational analysis. Results: The maxilla arch length was 3.70 mm longer and the inter-molar width of the maxilla was 3.06 mm longer in men (both p<0.01) than in women. Additionally, the mandible was 3.66 mm longer in men as compared to those in the women (p<0.01). As height increased, there was increase in the body weight (α=0.683, p<0.01), maxilla arch length (α=0.373, p<0.01), molar width of the maxilla (α=0.214, p<0.05), and the mandible (α=0.280, p<0.01). The greater the weight increase, the greater the maxillary arch length increase (α=0.392, p<0.01), and the greater the molar width of the maxilla (α=0.336, p<0.01) and mandible (α=0.502, p<0.01) increase. Conclusions: As physical size (both height and weight) increased, the maxillary length and molar width also increased. Based on the results of this study, the cause of malocclusion, form and size of the dental arch, and stable occlusion can be used as basic data.

• 대한치과교정학회지
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• 제18권1호
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• pp.217-225
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• 1988

This study was undertaken to examine relationship between tooth size and arch dimension in dental crowding. Two groups of dental casts were selected on the basis of dental crowding. One group, consisting of 51 pairs of dental casts (24 male and 27 female), exhibited remarkable dental crowding. A second group, consisting of 60 pairs of dental casts (30 male and 30 female), exhibited little or no crowding. Mean and standard deviation of the following parameters were used to compare two groups. individual and collective mesiodistal tooth diameters, buccal and lingual arch widths and arch area. The following results were obtained. 1. The crowed group revealed larger tooth size than noncrowded group. (p < 0.01) 2. The crowded group smaller maxillary dental arch dimension than noncrowded group except lingual arch width at canine region. (p < 0.01) 3. The corwded group revealed smaller mandibular dental arch dimension than noncrowded group except lingal arch width at second premalar region in the male and buccal arch width at canine, premolar region in the female. (p < 0.01) 4. The crowded group revealed smaller arch area than noncrowded group in the female (p < 0.01), but there was no significance in the male.

• 대한치과의사협회지
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• 제10권3호
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• pp.155-158
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• 1972

As a factor of dentistry, the form of the tooth especially the size plays an important part. And in orthodontics the relation between the tooth size, arch length and the basal arch is regarded important, and it is closely related to the extraction and retension probolem in treatment planning. The auther's study of the mesio-distal crown diameters of permanent teeth, width and length of the dental arch and basal arch from the cast of 50 men and 53 women who could be measured clerly, among 102 men and 107 women regarded as the normal occlusion showed the followings. 1. Table 1 and table 2 showed the measurement of the mesio-distal maximum width of the permanent teeth, width and length of the dental arch and basal arch of the upper and lower dentitions. 2. Men's mesio-distal width of the teeth, arch length and arch width of the upper and the lower dentition, basal arch width and basal arch length are larger than those of wonen's 3. We compared the Koreans with the American white. Upper central incisors, upper first molars and lower second premolars of the latter were larger than those of the former. And the Koreans's rest tooth of the rest were comparatively larger.

• 대한치과교정학회지
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• 제20권2호
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• pp.217-226
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• 1990

The purposes of this study were to clarify the effect of tooth size and arch size upon the crowding. 175 upper casts were measured and following conclusions were made. 1. Tooth size, intermolar width, 2nd premolar width of crowded group were not significantly different from those of noncrowded groups. 2. Intercanine width, arch length of noncrowded group were significantly larger than crowded group. 3. Multiple regression equations were derived by using tooth size, arch perimeter, arch length, intermolar width.

• 치위생과학회지
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• 제13권2호
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• pp.197-202
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• 2013

본 연구는 치위생과 학생 147명을 대상으로 체격에 따른 치열궁 크기의 관련성을 조사하고자 실시하였다. 연구를 위해 설문지 작성과 치열궁 장 폭경 계측을 위한 인상채득이 동시에 실시되었으며, 다음과 같은 결론을 얻었다. 1. 1년 이내에 구강검진 경험이 있는 경우는 74.8%, 코로 숨을 쉬는 경우는 86.4%, 교정과 발치경험이 있는 경우는 각각 18.4%, 49.7%로 조사되었다. 정제된 음식은 94.6%가 좋아한다고 응답하였으며, 단단한 음식은 52.4%가 좋아한다고 응답하였다. 2. 치열궁 크기의 관련 요인에 따른 치열궁 장 폭경은 모든 변수가 통계적으로 유의한 차이를 보이지는 못했다. 3. 체격에 따른 치열궁 장 폭경 중 통계적으로 유의한 차이를 나타낸 변수는 신장과 체중이었으며, 신장이 클수록 상악 치열궁 장경이 크게, 체중이 많이 나갈수록 하악 견치간 폭경과 상악 구치간 폭경도 큰 것으로 나타났다. 4. 체중이 많이 나갈수록 상, 하악 견치간 폭경과 상, 하악 구치간 폭경이 약한 양의 상관관계를 보였으며, 상하악 치열궁 장경과 견치간 폭경, 구치간 폭경에서는 상악 구치간폭경과 하악 구치간 폭경이 가장 높은 관련성을 보였다. 이상의 결과로 보아 체격요건 중 체중이 치열궁 형태에 영향을 주었다. 앞으로도 체격변화에 따른 치열궁의 변화를 지속적으로 조사함으로써 안정적인 교합과 구강건강을 위한 자료로 활용할 수 있도록 해야 할 것이다.

• 치위생과학회지
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• 제14권3호
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• pp.390-396
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• 2014

본 연구는 우리나라 여대생의 치열궁의 크기 및 형태와 교합유형을 조사하고 이들의 관련성을 알아보고자 치위생과 여학생 210명을 대상으로 실시하였다. 수집된 자료는 PASW 18.0 프로그램을 이용하여 통계분석하였으며, 결과는 다음과 같다. 치열궁의 크기 및 형태와 교합을 산술평균 및 빈도를 분석한 결과 상악의 견치 간 폭경은 34.38 mm, 제1대구치 폭경은 52.05 mm였으며, 견치 장경은 8.60 mm, 제1대구치장경은 28.69 mm였다. 하악은 견치 간 폭경이 26.42 mm, 제1대구치 폭경이 44.83 mm였으며, 장경은 견치가 5.54 mm, 제1대구치가 24.38 mm였다. 치열궁의 형태는 상악에서 정상이 29.0%, 협착이 60.5%, 공극이 10.5%였으며, 하악은 정상이 29.0%, 협착이 55.7%, 공극이 15.2%였다. 교합은 정상이 16.7%였으며, I급 부정교합이 55.7%로 가장 많았고, II급은 20.5%, III급은 7.1%였다. 치열궁의 형태와 교합에 따른 치열궁의 크기를 비교한 결과 하악의 제1대구치 폭경이 치열궁의 형태가 공극인 경우에 45.95로 가장 컸으며, 정상이 44.73, 협착이 44.58을 기록하였다(p=0.032). 치열궁 형태와 교합관계는 상 하악 모두 I, II, III급 부정교합에서 협착이 71.8%, 76.7%, 60.0%와 69.2%, 60.5%, 60.0%로 가장 높았다(p<0.001). 이상의 결과를 종합해보면 과거에 비해 여러 원인으로 치열궁의 장 폭경이 줄어들고 있으며, 협착으로 인한 부정교합이 증가하고 있다. 따라서 정기적인 치과검진과 구강악습관의 관리가 필요할 것으로 보인다.

• 대한치과보철학회지
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• 제36권1호
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• pp.166-182
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• 1998

The purposes of this study are to evaluate the Korean mandibular dental arch and classify the mandibular dental arch shape and size based on the incisal angle, canine angle, inter second molar width and height. In this study the mandibular study models were fabricated using irreversible hydrocolloid impression material from 225 volunteers with a mean age 23.62 (range 19-29). And the study models were measured with 3-dimensional measuring device and the mandibular dental arch was classified by means of K-means clustering method and visual inspection, then obtained data were analyzed with t-test for the statistical analysis. The results were as follows ; 1. The average canine height was 5.19mm(s.d. 1.17) in both sex, 5.34mm in male, and 4.95mnm in female. And the sexual difference was significant($0). 2. The average second molar height was 39.81mm(s.d. 2.44) in both sex, 40.19mm in male, and 39.21mm in female. And the sexual difference was significant($0). 3. The average inter-canine width was 27.16mm(s.d. 1.78) in both sex, 27.41mm in male, and 26.77mm in female. And the sexual difference was significant($0). 4. The average inter-first molar width was 46.93mm(s.d. 2.67) in both sex, 47.72mm in male, and 45.7mm in female. And the sexual difference was significant($0). 5. The inter-second molar width was average 56.09mm(s.d. 3.01) in both sex, 57.24mm in male, and 54.32mn in woma. And the sexual difference was significant($0). 6. The arch form was classified into three shapes based on the incisal and canine angle. V-shape showed $124.88^{\circ}$ of incisal angle and $141.64^{\circ}$ of canine angle, U-shape showed $152.76^{\circ}\;and\;125.35^{\circ}$, and O-shape showed $138.03^{\circ}\;and \;33.66^{\circ}$ respectively. Each shape distribution was that the V-shape was 14.2%, the U-Shape was 14.7%, and the O-shape was 71.1% of the 225 study models. 7. It was thought that the use of second molar width is more reasonable than height for classifying the dental arch size. The arch size was classified into four sizes based on the second molar width. Size 1 showed range of 42.24-48.23mm, size 2 showed 48.24-54.23mm, size 3 showed 54.24-60.23mm, and size 4 showed 60.24-66.23mm respectively. Each arch size distribution was that the size 1 was 1.3%, the size 2 was 27.1%, the size 3 was 63.6%, and the size 4 was 8.0% of the 225 study models.

• 대한치과교정학회지
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• 제34권6호
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• pp.488-496
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• 2004

본 연구는 치아밀집이 과도한 치아크기에 의해 나타나는지 아니면 좁은 치열궁으로 인해 초래되는지 그 원인을 규명하기 위하여 시행되었다. 앵글씨 1급 구치관계를 가지면서 상악 하악 모두 7mm이상의 치아밀집을 나타내는 경우와 정상교합자를 각각 실험군과 대조군으로 설정하였다. 82조(남29, 여53)의 치아밀집 석고모형과 82조(남37, 여45)의 정상교합 석고모형에서 각 치아의 치관 근원심폭경과 협측 및 설측 치열궁 폭경을 측정하고 치아밀집군과 정상교합군 간에 비교한 결과 치관근원심폭경과 치열궁 폭경 모두에서 두 군간의 유의한 차이가 나타났다. 치아밀집의 기여요인을 살펴본 본 연구 결과 치아밀집은 치열궁과 치아크기, 모두에 의해 초래됨으로 치열궁 확장 및 치아발치, 모두가 치료방법으로 사용될 수 있음을 알 수 있었다

• The Journal of Advanced Prosthodontics
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• 제13권4호
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• pp.205-215
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• 2021

PURPOSE. The purpose of this study was to compare the accuracy of three intraoral scanner (IOS) systems with three different dental arch widths. MATERIALS AND METHODS. Three dental models with different intermolar widths (small, medium, and large) were attached to metal bars of different lengths (30, 40, and 50 mm). The bars were measured with a coordinate measuring machine and used as references. Three IOSs were compared: TRIOS 3 (TRI), True Definition (TD), and Dental Wings (DW). The relative length and angular deviation of both ends of the metal bars from the scan data set (n = 15) were calculated and analyzed. RESULTS. Comparing among scanners in terms of trueness, the relative length deviation of DW in the small (1.28%) and medium (1.08%) arches were significantly higher than TRI (0.46% and 0.48%) and TD (0.33% and 0.18%). The angular deviation of DW in the small (1.75°) and medium (1.83°) arches were also significantly greater than TRI (0.63° and 0.40°) and TD (0.55° and 0.89°). Comparing within scanner, the large arch of DW showed better accuracy than other arch sizes (P < .05). On the other hand, the larger arch of TD presented a greater tendency of angular deviation in terms of trueness. No significant differences were found in terms of trueness between the arch widths of TRI group. CONCLUSION. The different widths of the dental arches can affect the accuracy of some intraoral scanners in full arch scan.