자연 두부 위치 및 안정위에서 한국 성인 환자 골격의 전.후 관계 결정 Assessment of antero-posterior skeletal relationships in adult Korean patients in the natural head position and centric relation원문보기
SN 기준선과 FH 기준선이 안모의 심미에 종종 맞지 않아서 모든 치열 교정 및 악교정 수술 증례를 이 기준선을 이용하여 반복적으로 정확히 진단하기가 매우 어렵다. 따라서, 이 연구의 목적은 한국 성인 환자를 대상으로 안정위에서 자연 두부 위치의 개인내 재현성을 확인하고 진성 수평선에 대해 SN 기준선과 FH 기준선의 개인간 다양성을 증명하는 것이다. 그러고, 상기 두 연구를 바탕으로 Na 기준 진수선에서 A점 및 B점까지의 거리가 SNA 및 SNB 각도와 상관 관계가 있는지 여부를 조사하는 것이다. 부정교합 및 악골의 부조화를 치료받기 위해 강남성심병원과 한강성심병원 교정과에 내원한 116 명의 환자(남자 23명, 여자 93명)를 조사하였다. 중심위 왁스 바이트는 모든 대상들로부터 채득하였고 1주일 간격으로 자연 두부 위치와 중심위 상태에서 모든 대상자들의 측모두부방사선사진을 2번 촬영하였다. 3개의 변수에서 위치 선정의 방법 오류는 다른 연구에 비해 낮은 수치를 보였다. 그리고 6개의 변수에서 군내 상관계수를 이용하여 자연두부 위치의 개인간 재현성을 증명하였다 (p < 0.001). 각 환자에서 진성 수평선에 대한 FH 기준선간의 각도는 통계적으로 기준치 0도와 다르지 않았다 (p > 0.05). 하지만 임상적으로 다양한 수치를 보였다 (SD: $3.89^{\circ}$). 반면 각 에서 진성 수평선에 대한 SN 기준선간의 각도는 기준치 7도와 매우 다르게 나타났다 (p < 0.05). Na 기준 진수선에서 A점 및 B점까지의 거리와 SNA 및 SNB 각도와의 피어슨 상관 계수에서 유의하지만 매우 낮은 수치를 보였다 (p < 0.01). 이에 자연 두부 위치는 치열 교정 환자 및 악교정 수술 환자의 진단을 위해 재현적이고 믿을 만한 위치이며 자연두부 위치 및 중심위 상태에서 Na 기준 진수선은 SN과 FH기준선을 대신하여 한국인 성인 환자에서 상악쿨과 하악골의 전후 관계를 결정하는데 매우 유용한 기준선으로 이용될 수 있을 것으로 생각한다.
SN 기준선과 FH 기준선이 안모의 심미에 종종 맞지 않아서 모든 치열 교정 및 악교정 수술 증례를 이 기준선을 이용하여 반복적으로 정확히 진단하기가 매우 어렵다. 따라서, 이 연구의 목적은 한국 성인 환자를 대상으로 안정위에서 자연 두부 위치의 개인내 재현성을 확인하고 진성 수평선에 대해 SN 기준선과 FH 기준선의 개인간 다양성을 증명하는 것이다. 그러고, 상기 두 연구를 바탕으로 Na 기준 진수선에서 A점 및 B점까지의 거리가 SNA 및 SNB 각도와 상관 관계가 있는지 여부를 조사하는 것이다. 부정교합 및 악골의 부조화를 치료받기 위해 강남성심병원과 한강성심병원 교정과에 내원한 116 명의 환자(남자 23명, 여자 93명)를 조사하였다. 중심위 왁스 바이트는 모든 대상들로부터 채득하였고 1주일 간격으로 자연 두부 위치와 중심위 상태에서 모든 대상자들의 측모두부방사선사진을 2번 촬영하였다. 3개의 변수에서 위치 선정의 방법 오류는 다른 연구에 비해 낮은 수치를 보였다. 그리고 6개의 변수에서 군내 상관계수를 이용하여 자연두부 위치의 개인간 재현성을 증명하였다 (p < 0.001). 각 환자에서 진성 수평선에 대한 FH 기준선간의 각도는 통계적으로 기준치 0도와 다르지 않았다 (p > 0.05). 하지만 임상적으로 다양한 수치를 보였다 (SD: $3.89^{\circ}$). 반면 각 에서 진성 수평선에 대한 SN 기준선간의 각도는 기준치 7도와 매우 다르게 나타났다 (p < 0.05). Na 기준 진수선에서 A점 및 B점까지의 거리와 SNA 및 SNB 각도와의 피어슨 상관 계수에서 유의하지만 매우 낮은 수치를 보였다 (p < 0.01). 이에 자연 두부 위치는 치열 교정 환자 및 악교정 수술 환자의 진단을 위해 재현적이고 믿을 만한 위치이며 자연두부 위치 및 중심위 상태에서 Na 기준 진수선은 SN과 FH기준선을 대신하여 한국인 성인 환자에서 상악쿨과 하악골의 전후 관계를 결정하는데 매우 유용한 기준선으로 이용될 수 있을 것으로 생각한다.
Objective: This study aimed to verify the intra-individual reproducibility of the natural head position (NHP) in adult Korean patients in the centric relation (CR) position and to prove the inter-individual variability of the Frankfurt horizontal (FH) plane and sella-nasion (SN) line compared to the...
Objective: This study aimed to verify the intra-individual reproducibility of the natural head position (NHP) in adult Korean patients in the centric relation (CR) position and to prove the inter-individual variability of the Frankfurt horizontal (FH) plane and sella-nasion (SN) line compared to the true horizontal line (THL). In addition, the study aimed to investigate the correlations between linear measurements from A-point and B-point to the nasion true vertical line (NTVL) and angular measurements from A-point and B-point to the SN line. Methods: Two lateral cephalograms were taken of 116 subjects (23 males, 93 females) with CR wax bites in a NHP at a one-week interval. Results: Method errors of three variables and intraclass correlation coefficients of six parameters proved the intra-individual reproducibility of NHP (p < 0.001). The angle of the FH to the THL was not significantly different from $0^{\circ}$ (p > 0.05), but it was clinically variable (SD $3.89^{\circ}$) on the inter-individual level. Conversely, the angle of the SN line to the THL was significantly different from $7^{\circ}$ (p < 0.05). Very low correlation was found between the linear measurements and angular measurements of A-point and B-point (p < 0.01). Conclusions: The NTVL could be a useful reference line for assessing the antero-posterior position of the maxilla and mandible of Korean adult patients in NHP and CR.
Objective: This study aimed to verify the intra-individual reproducibility of the natural head position (NHP) in adult Korean patients in the centric relation (CR) position and to prove the inter-individual variability of the Frankfurt horizontal (FH) plane and sella-nasion (SN) line compared to the true horizontal line (THL). In addition, the study aimed to investigate the correlations between linear measurements from A-point and B-point to the nasion true vertical line (NTVL) and angular measurements from A-point and B-point to the SN line. Methods: Two lateral cephalograms were taken of 116 subjects (23 males, 93 females) with CR wax bites in a NHP at a one-week interval. Results: Method errors of three variables and intraclass correlation coefficients of six parameters proved the intra-individual reproducibility of NHP (p < 0.001). The angle of the FH to the THL was not significantly different from $0^{\circ}$ (p > 0.05), but it was clinically variable (SD $3.89^{\circ}$) on the inter-individual level. Conversely, the angle of the SN line to the THL was significantly different from $7^{\circ}$ (p < 0.05). Very low correlation was found between the linear measurements and angular measurements of A-point and B-point (p < 0.01). Conclusions: The NTVL could be a useful reference line for assessing the antero-posterior position of the maxilla and mandible of Korean adult patients in NHP and CR.
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문제 정의
The purpose of this study was to verify the intra-m-dividual reproducibility of the NHP in CR position and to prove the inter-individual differences in the FH plane and SN line compaE to the true horizontal line (THL) in adult Korean patients. In addition, the study aimed to investigate the correlations between linear measurements from A-point and B-point to the nasion true vertical line (NTVL) and angular measurements from 쇼-point and B-point to the SN line on the basis of the fiist twe studies.
제안 방법
The subjects were placed 120 cm from a 30 x 40 cm mirror and asked to stare at their own eyes after exercising their head up and down. All of the subjects were asked to bite their CR wax records and to relax their lips and arms during X-ray.
in adult Korean patients. In addition, the study aimed to investigate the correlations between linear measurements from A-point and B-point to the nasion true vertical line (NTVL) and angular measurements from 쇼-point and B-point to the SN line on the basis of the fiist twe studies.
4) in 27 selected women in the NHP. In that study, the subjects were asked to sit comfortably, relax on a chair, and look into the reflection of their own eyes in the mirror during the lateral cephalogram.
That is, the intra-individual reproducibility of NHP is inevitable and the differences in the FH plane and SN line compared to THL were also required for this study. Although statistical correlations were identified according to Pearson correlation coefficients, very low correlation coefficients were fsmd between the linear measurements of A-point to the NTVL and SN-A angle, and B-point to the NTVL and SN-B angle.
Thus, the reproducibility of NHP was also verified by intraclass correlation coefficients for six parameters. The criteria for selecting the six parameters were as follows: NTVL/E-line for reproducibility of facial aesthetics, NTVL/palatal plane as anintracranial reference line, NTVL/CVT and OPT for 한畛 喚vic시 vertebrae, NTVL/SN for the anterior cranial base (SN), and SN/OPT for the anterior cranial base to cervical vertebrae.
대상 데이터
A total of 116 subjects (23 males, age range 19 -41 years and mean age 27.9 years; 93 females, age range 19 - 47 years and mean age 23.6 years) were investigated. The patients visited the Department of Orthodontics at the university hospital to receive treatment for malocclusions and skeletal discrepancies.
measurements. Method errors in digitizing were calculated in 15 randomly selected subjects. Each T1 lateral cepMogram was retraced by the same observer 1 week after the initial tracing.
Three variables (SN/NTVL, SN/OPT, and OPT/THL) were 시so calculated. The TI and T2 data were used.
6 years) were investigated. The patients visited the Department of Orthodontics at the university hospital to receive treatment for malocclusions and skeletal discrepancies. No orthodontic treatment, orthognathic surgery, or prosthetic treatment more than a 3~unit bridge was provided in advance.
The subjects were asked to stand in front of a mirror with their feet a shoulder width apart and arms relaxed, wearing eyeglasses attached to a fluid leveler. The subjects were placed 120 cm from a 30 x 40 cm mirror and asked to stare at their own eyes after exercising their head up and down. All of the subjects were asked to bite their CR wax records and to relax their lips and arms during X-ray.
데이터처리
A method error study was performed to determine the errors in digitizing landmarks and measurements. Method errors in digitizing were calculated in 15 randomly selected subjects.
The data for this analy-어 s were the mean T1 and T2 measurements. In addition to linear measurements from A-point and B-point to the NTVL (Fig 6A), SN-A and SN-B angles (Fig 6B) were measured and compared by Pearson correlation coefficients using Tl, T2, and mean data.
The NTVL was made by moving the metal chain line parallel and drawing a line through the nasion point. The data were transferred to SPSS for windows version 11, 5 (SPSS Inc., Chicago, IL, USA) for analysis using intraclass correlation coefficients, one sample t-test, and Pearson correlation coefficients. The mean, standard deviation, minimum, and maximum was c시culated for each variable.
이론/모형
Method errors in positioning were evaluated in 116 subjects using Dahlberg's form냐a. Three variables (SN/NTVL, SN/OPT, and OPT/THL) were 시so calculated.
The CR was recorded according to the Roth technique (power centric registration method) described by Choi18 before taking lateral cephalograms (Fig 1).
성능/효과
5° in this study. The results of this study also showed large inter-individual variability in the SN to THL angle. Lundstrdm and Lundstrdm44 concluded that the large variation in both intracranial reference lines (FH and SN) compared to the NHP, as well as NHO, confirmed their relative unsuitability as cephalometric references for clinical purposes.
7°. The results of this study showed that the FH to THL angles were not significantly different from 0°, but they were clinically variable due to a high standard deviation (3.89°) and wide range (12.43° - 7.65°), The angle above the THL was positive and the angle below was negative. The angles used in this study were the mean of the Tl and T2 measurements.
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