• The Journal of Advanced Prosthodontics
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• 제5권1호
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• pp.9-15
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• 2013

PURPOSE. The purpose of this study was to determine accurately the part of the tragus to be used to form the Ala-Tragal line or Camper's line in orthognathic profile patients. MATERIALS AND METHODS. 150 dentate subjects with age of 18-40 years with orthognathic profile were sampled. Life-size lateral digital photographs of the face with fox plane were taken in natural head position. Different angles between Eye-Ear plane and occlusal plane ($OT_1$-OP), Eye-Ear plane and ala-superior border of tragus ($OT_1-AT_1$), Eye-Ear plane and ala-middle border of tragus ($OT_1-AT_2$) and Eye-Ear plane and ala-inferior border of tragus ($OT_1-AT_3$) were calculated using computer software package, AutoCAD 2004. From the three angles formed by the Eye-ear plane ($OT_1$ or FH plane) and the ala-tragal lines, the one closest to the angle formed between Eye-Ear plane ($OT_1$) and occlusal plane (OP) was used to determine the occlusal plane of orientation. The obtained results were subjected to ANOVA F test, Tukey's Honestly significant difference test, followed by Karl Pearson coefficient of correlation test. P values of less than 0.05 were taken as statistically significant. RESULTS. The mean of base line angle i.e. $OT_1$-OP angle ($11.96{\pm}4.36$) was found to be close to $OT_1-AT_2$ angle ($13.67{\pm}1.93$) and $OT_1-AT_3$ angle ($10.31{\pm}2.03$), but $OT_1$-OP angle was found to be more closer to $OT_1-AT_3$ angle. Comparison of mean angles showed that $OT_1$-OP angle in both males (11.68) and females (12.51) is close to $OT_1-AT_3$ angle (males- 11.01, females- 11.95). CONCLUSION. The line joining from ala to the lower border of the tragus was parallel to the occlusal plane in 53.3% of the subjects. There was no influence of the sex on the level of occlusal plane.

• 대한치과교정학회지
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• 제50권4호
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• pp.258-267
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• 2020

Objective: This study aimed to analyze the correlation of horizontal and sagittal planes used in two-dimensional diagnosis with lip canting by using three-dimensional (3D) analysis. Methods: Fifty-two patients (25 men, 27 women; average age: 24 years) undergoing treatment for dentofacial deformity were enrolled. Computed tomography images were acquired, and digital imaging and communication in medicine files were reconstructed into a 3D virtual model wherein horizontal and sagittal craniofacial planes were measured. Subsequently, the correlations of lip canting with these horizontal and sagittal planes were investigated. Results: The mandibular symmetry plane, the occlusal plane, Camper's plane, the mandibular plane, Broadbent's plane, and the nasal axis plane were correlated with the amount of lip canting (Pearson's correlation coefficients: 0.761, 0.648, 0.556, 0.526, 0.438, and 0.406, respectively). Planes associated with the lower part of the face showed the strongest correlations; the strength of the correlations decreased in the midfacial and cranial regions. None of the planes showed statistically significant differences between patients with clinical lip canting (> 3°) and those without prominent lip canting. Conclusions: The findings of this study suggest that lip canting is strongly correlated with the mandibular symmetry plane, which includes menton deviation. This finding may have clinical implications with regard to the treatment of patients requiring correction of lip canting. Further studies are necessary for evaluating changes in lip canting after orthognathic surgery.

• 대한치과보철학회지
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• 제45권5호
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• pp.696-705
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• 2007

Statement of problem: In the Protar articulator, the models are almost parallel with the Camper's plane. The ultrasonic-based ARCUSdigma system is basis for the determination of dynamic function parameters with so-called "articulator related registration". Purpose: The purpose of this study was to compare the sagittal condylar guidance angles found by use of the wax protrusive records in a semi-adjustable articulator(KaVo Protar 7) with those found by use of the Axiograph (ARCUSdigma). 83 volunteers with intact dentition participated in this study after obtainment of informed consent. Material and method: The sagittal condylar guidance angles were measured and estimated statistically by semi-articulator and Axiograph. All the readings were in degrees. No control was used in this project. To test whether there was a significant difference between the 2 independent samples, paired t-test and Kruskal-Wallis test were carried out(p=.05). Results: 1. The mean results for the wax protrusive records were as follow: right side (32.65 degrees, SD 16.48); left side (33.27 degrees, SD 17.49). 2. The mean results for the Axiograph were as follow: right side (32.26 degrees, SD 7.00); left side (33.07 degrees, SD 7.58). 3. There was no statistical difference on the wax protrusive records and Axiograph(p>0.05). Conclusion: Both methods of wax protrusive records and Axiograph are clinically acceptable for measuring the sagittal condylar guidance angles in semi-adjustable articulators.

• 대한치과보철학회지
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• 제51권3호
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• pp.153-159
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• 2013

연구 목적: 근래에 들어 체크바이트 법뿐만 아니라 디지털 센서를 이용하여 하악의 운동을 기록, 분석하여 과로각을 계산하는 방법이 개발되어 사용되어져 오고 있으나 두 방법간의 비교하는 연구는 없었다. 이에 새로운 방법인 ARCUSdigma 2 system을 이용한 방법과 전통적인 방법인 체크바이트 법으로 과로각을 측정하여 두 방법 간의 차이를 비교해 보고자 하였다. 연구 대상 및 방법: 교정치료의 경험이 없고, 제3대구치를 제외한 치아의 결손이 없고, 교합평면의 변화를 수반한 광범위한 수복이 없으며, 악관절 질환이 없는 24세부터 34세 사이의 건강한 젊은 성인 남녀(남 10명, 여 10명)를 대상으로 하여 Camper's plane을 기준으로 하여 ARCUSdigma 2 system과 왁스를 사용한 체크바이트법을 각각 3번씩 측정하였으며 교합기는 KaVo Protar Evo 7 반조절성 교합기를 사용하여 각각의 방법으로 과로경사각을 측정하였다. 두 방법 간의 자료를 SPSS 20을 이용한 Mann-Whitney U Test를 사용하여 통계적으로 분석하였다. 결과: 1. ARCUSdigma 2 system에서 전방시상과로각은 좌우 각각 $26.97^{\circ}({\pm}7.38^{\circ})$, $29.80^{\circ}({\pm}8.19^{\circ})$로 측정되었으며, 측방과로경사각은 $5.75^{\circ}({\pm}3.47^{\circ})$와 $8.10^{\circ}({\pm}4.98^{\circ})$로 측정되었다. 2. 체크바이트법에서 전방시상과로각은 좌우 각각 $25.20^{\circ}({\pm}6.53^{\circ})$, $28.18^{\circ}({\pm}7.38^{\circ})$로 측정되었으며, 측방과로경사각은 $10.97^{\circ}({\pm}5.63^{\circ})$와 $12.03^{\circ}({\pm}5.22^{\circ})$로 측정되었다. 결론:두 방법 모두 남녀간 좌우간 유의적 차이는 나타나지 않았으며 두 방법 사이에서는 측방시상과로각에서 ARCUSdigma 2를 사용하여 측정한 값이 Checkbite를 사용하여 측정한 값보다 통계적으로 유의하게 작게 측정되었다(P<.05).

• 대한치과보철학회지
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• 제46권4호
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• pp.420-430
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• 2008

연구목적: 기존의 교합기들은 서양인의 악안면구조와 하악운동 평균치에 맞추어 제작되어 있다. 이에 현재 임상교육에 널리 사용하고 있는 반조절성 교합기 (KaVo PROTAR, Hanau Modular)를 한국인에게 적용함에 있어서 적절한 기준을 구하고자 이번 연구를 시행하였다. 연구방법: $24{\sim}41$세 한국인 성인 59명 (남41명, 여18명)을 선정하였다. 피검자 일인당 두쌍의 상하악 모형을 제작, KaVo PROTARevo 7과 Hanau Modular 반조절성교합기에 facebow transfer하여 교합기에 부착 후 전방시상과로각, 교합평면경사도, 교합기 상의 하악의 위치를 계측하였다. 연구성적: 1. 평균 전방시상과로각은 KaVo PROTAR 반조절성 교합기상에서 $33.75^{\circ}$(표준편차 $12.46^{\circ}$)였고, Hanau Modular 반조절성 교합기상에서 $40.72^{\circ}$(표준편차 $12.09^{\circ}$)였다. 2. 평균 교합평면경사각은 KaVo PROTAR 반조절성 교합기상에서 $-2.76^{\circ}$(표준편차 $3.63^{\circ}$)였고, Hanau Modular 반조절성 교합기상에서 $11.87^{\circ}$(표준편차 $3.63^{\circ}$)였다. 3. 하악치열의 중심은 교합기의 중심에서 평균 $5{\sim}7$ mm 범위내에 있었으며 KaVo PROTAR 반조절성 교합기에서는 전치부와 구치부 모두 교합기의 상하적 위치관계에서 중앙에 위치하였고, Hanau Modular 반조절성 교합기에서는 교합기의 중앙높이에서 전치부는 하방 5 mm, 구치부는 상방 3 mm에 위치하였다.