1.Are different photogrammetry applications on smartphones sufficiently reliable?
Gülden KARABIBER ; Hanife Nuray YILMAZ ; Gamze YILDIRIM
The Korean Journal of Orthodontics 2025;55(1):37-47
Objective:
This study aimed to compare the accuracy of Qlone, Magiscan, and 3dMD with that of direct anthropometry (DA).
Methods:
The study involved 41 patients. Sixteen facial landmarks, including six individual and five paired points, were marked on each participant’s face. Subsequently, 18 linear measurements were assessed using a 3dMD device (multicamera photogrammetry), Qlone, Magiscan smartphone applications (single-camera photogrammetry), and DA.The Qlone and Magiscan images were calibrated using a reference point 10 mm from the nasion during DA to ensure a 1:1 correspondence.
Results:
Concerning the precision of the digital methods compared to DA, the mean intraclass correlation coefficient values of 3dMD, Qlone and Magiscan were 0.989, 0.980 and 0.982, respectively. Compared with DA, 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements (highest value = 0.95 ± 0.62 mm). The highest values for Qlone and Magiscan were 1.51 ± 1.11 mm and 2.14 ± 1.69 mm, respectively. According to the number of parameters, the ranking of unreliable values (> 2 mm) was Magiscan (n = 46), Qlone (n = 35), and then, 3dMD (n = 4). Furthermore, reliability (less than 1 mm) was the highest for 3dMD (n = 517), followed by Magiscan (n = 457), and then, Qlone (n = 415).
Conclusions
The 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements. Based on statistical analysis, the trueness values of Magiscan and Qlone were close to that of 3dMD. To apply these smartphone applications clinically, more studies are necessary.
2.Are different photogrammetry applications on smartphones sufficiently reliable?
Gülden KARABIBER ; Hanife Nuray YILMAZ ; Gamze YILDIRIM
The Korean Journal of Orthodontics 2025;55(1):37-47
Objective:
This study aimed to compare the accuracy of Qlone, Magiscan, and 3dMD with that of direct anthropometry (DA).
Methods:
The study involved 41 patients. Sixteen facial landmarks, including six individual and five paired points, were marked on each participant’s face. Subsequently, 18 linear measurements were assessed using a 3dMD device (multicamera photogrammetry), Qlone, Magiscan smartphone applications (single-camera photogrammetry), and DA.The Qlone and Magiscan images were calibrated using a reference point 10 mm from the nasion during DA to ensure a 1:1 correspondence.
Results:
Concerning the precision of the digital methods compared to DA, the mean intraclass correlation coefficient values of 3dMD, Qlone and Magiscan were 0.989, 0.980 and 0.982, respectively. Compared with DA, 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements (highest value = 0.95 ± 0.62 mm). The highest values for Qlone and Magiscan were 1.51 ± 1.11 mm and 2.14 ± 1.69 mm, respectively. According to the number of parameters, the ranking of unreliable values (> 2 mm) was Magiscan (n = 46), Qlone (n = 35), and then, 3dMD (n = 4). Furthermore, reliability (less than 1 mm) was the highest for 3dMD (n = 517), followed by Magiscan (n = 457), and then, Qlone (n = 415).
Conclusions
The 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements. Based on statistical analysis, the trueness values of Magiscan and Qlone were close to that of 3dMD. To apply these smartphone applications clinically, more studies are necessary.
3.Are different photogrammetry applications on smartphones sufficiently reliable?
Gülden KARABIBER ; Hanife Nuray YILMAZ ; Gamze YILDIRIM
The Korean Journal of Orthodontics 2025;55(1):37-47
Objective:
This study aimed to compare the accuracy of Qlone, Magiscan, and 3dMD with that of direct anthropometry (DA).
Methods:
The study involved 41 patients. Sixteen facial landmarks, including six individual and five paired points, were marked on each participant’s face. Subsequently, 18 linear measurements were assessed using a 3dMD device (multicamera photogrammetry), Qlone, Magiscan smartphone applications (single-camera photogrammetry), and DA.The Qlone and Magiscan images were calibrated using a reference point 10 mm from the nasion during DA to ensure a 1:1 correspondence.
Results:
Concerning the precision of the digital methods compared to DA, the mean intraclass correlation coefficient values of 3dMD, Qlone and Magiscan were 0.989, 0.980 and 0.982, respectively. Compared with DA, 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements (highest value = 0.95 ± 0.62 mm). The highest values for Qlone and Magiscan were 1.51 ± 1.11 mm and 2.14 ± 1.69 mm, respectively. According to the number of parameters, the ranking of unreliable values (> 2 mm) was Magiscan (n = 46), Qlone (n = 35), and then, 3dMD (n = 4). Furthermore, reliability (less than 1 mm) was the highest for 3dMD (n = 517), followed by Magiscan (n = 457), and then, Qlone (n = 415).
Conclusions
The 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements. Based on statistical analysis, the trueness values of Magiscan and Qlone were close to that of 3dMD. To apply these smartphone applications clinically, more studies are necessary.
4.Are different photogrammetry applications on smartphones sufficiently reliable?
Gülden KARABIBER ; Hanife Nuray YILMAZ ; Gamze YILDIRIM
The Korean Journal of Orthodontics 2025;55(1):37-47
Objective:
This study aimed to compare the accuracy of Qlone, Magiscan, and 3dMD with that of direct anthropometry (DA).
Methods:
The study involved 41 patients. Sixteen facial landmarks, including six individual and five paired points, were marked on each participant’s face. Subsequently, 18 linear measurements were assessed using a 3dMD device (multicamera photogrammetry), Qlone, Magiscan smartphone applications (single-camera photogrammetry), and DA.The Qlone and Magiscan images were calibrated using a reference point 10 mm from the nasion during DA to ensure a 1:1 correspondence.
Results:
Concerning the precision of the digital methods compared to DA, the mean intraclass correlation coefficient values of 3dMD, Qlone and Magiscan were 0.989, 0.980 and 0.982, respectively. Compared with DA, 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements (highest value = 0.95 ± 0.62 mm). The highest values for Qlone and Magiscan were 1.51 ± 1.11 mm and 2.14 ± 1.69 mm, respectively. According to the number of parameters, the ranking of unreliable values (> 2 mm) was Magiscan (n = 46), Qlone (n = 35), and then, 3dMD (n = 4). Furthermore, reliability (less than 1 mm) was the highest for 3dMD (n = 517), followed by Magiscan (n = 457), and then, Qlone (n = 415).
Conclusions
The 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements. Based on statistical analysis, the trueness values of Magiscan and Qlone were close to that of 3dMD. To apply these smartphone applications clinically, more studies are necessary.
5.Are different photogrammetry applications on smartphones sufficiently reliable?
Gülden KARABIBER ; Hanife Nuray YILMAZ ; Gamze YILDIRIM
The Korean Journal of Orthodontics 2025;55(1):37-47
Objective:
This study aimed to compare the accuracy of Qlone, Magiscan, and 3dMD with that of direct anthropometry (DA).
Methods:
The study involved 41 patients. Sixteen facial landmarks, including six individual and five paired points, were marked on each participant’s face. Subsequently, 18 linear measurements were assessed using a 3dMD device (multicamera photogrammetry), Qlone, Magiscan smartphone applications (single-camera photogrammetry), and DA.The Qlone and Magiscan images were calibrated using a reference point 10 mm from the nasion during DA to ensure a 1:1 correspondence.
Results:
Concerning the precision of the digital methods compared to DA, the mean intraclass correlation coefficient values of 3dMD, Qlone and Magiscan were 0.989, 0.980 and 0.982, respectively. Compared with DA, 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements (highest value = 0.95 ± 0.62 mm). The highest values for Qlone and Magiscan were 1.51 ± 1.11 mm and 2.14 ± 1.69 mm, respectively. According to the number of parameters, the ranking of unreliable values (> 2 mm) was Magiscan (n = 46), Qlone (n = 35), and then, 3dMD (n = 4). Furthermore, reliability (less than 1 mm) was the highest for 3dMD (n = 517), followed by Magiscan (n = 457), and then, Qlone (n = 415).
Conclusions
The 3dMD achieved excellent trueness with the lowest average absolute differences in the measurements. Based on statistical analysis, the trueness values of Magiscan and Qlone were close to that of 3dMD. To apply these smartphone applications clinically, more studies are necessary.
6.Lupus nephritis presenting with massive ascites and pleural effusion (pseudo-pseudo Meigs’ syndrome)
Rabia DENIZ ; Gülşah HACIMURTAZAOĞLU-DEMIR ; Bilgin KARAALIOĞLU ; Duygu Sevinç ÖZGÜR ; Gamze AKKUZU ; Fatih YILDIRIM ; Cemal BES
Journal of Rheumatic Diseases 2024;31(2):116-119
The triad of ascites, pleural effusion, and elevated cancer antigen-125 (CA-125) levels in the absence of ovarian malignancy in systemic lupus erythematosus patients is specifically named pseudo-pseudo Meigs’ syndrome (PPMS) or Tjalma syndrome. In this case we reported a 33 years female patient with pleural effusion lasting for 3 years and new onset progressive massive ascites and increased level of CA-125. After she was evaluated for an underlying benign and malign ovarian tumor or any other malignancies, serologic tests were requested with respect to progressive renal dysfunction, proteinuria, lymphopenia, anemia, and effusion.She was diagnosed with systemic lupus erythamatosus (SLE) and renal biopsy showed class-V lupus nephritis. Immunosuppressive treatment led to improvement in both SLE activity and components of PPMS, including massive ascites and pleural effusion and without the need of diuretics. Co-existence of unexplained CA-125 increase, pleural effusion, and ascites might be related to PPMS and detailed examination to exclude malignancy and early and effective treatment of SLE are the mainstay of management.

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