TY  - JOUR
AU  - Arapović-Savić, Marijana
AU  - Savić, Mihajlo
AU  - Umićević-Davidović, Mirjana
AU  - Arbutina, Adriana
AU  - Nedeljković, Nenad
AU  - Glišić, Branislav
PY  - 2019
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/2432
AB  - Introduction/Objective Rapid developments in information technologies lead to the wider use of digital representations of dental study models in orthodontics. Most popular way of digitizing the models is to use a 3D scanner and then perform measurements on 3D models, which requires additional and expensive hardware and software resources. In this paper we present an alternative approach based on the use of photogrammetry in the newly developed OrthoPhoto4D software that calculates and corrects perspective distortion errors. Methods We measured individual tooth width for 24 teeth, 12 two-teeth segments as well as inter-molar and inter-canine distances on 50 models. Measurements are performed in OrthoPhoto4D software that uses four photographs of each model for measurements, uses QR codes for automation, calculates the camera position and corrects perspective distortion-caused errors in measurements. Obtained measurements are compared to ones obtained from models generated by structured light 3D scanner. Results Statistical analysis strongly indicates that there is no significant difference between the two methods. The recorded differences also have no clinical impact as they have mean values of 0.2 mm for individual tooth widths, approximately 0.2 mm for two teeth segments, and under 0.3 mm for both inter-canine and inter-molar distances. All recorded differences fall within the expected measurement error. Conclusion We concluded that the described photogrammetry measurements performed in OrthoPhoto4D can be used in diagnosis and therapy planning.
AB  - Uvod/Cilj Brzi razvoj informacionih tehnologija doveo je do široke upotrebe digitalnih studijskih modela u ortodonciji. Najpopularniji način digitalizacije modela je korišćenje 3D skenera, a zatim i merenja na 3D modelima, što zahteva dodatne i skupe hardverske i softverske resurse. U ovom radu predstavljamo alternativni pristup zasnovan na korišćenju fotogrametrije u novorazvijenom softveru OrthoPhoto4D, koji izračunava i ispravlja greške nastale kao posledica perspektivne distorzije. Metod Na 50 studijskih modela merena je meziodistalna širina za 24 zuba, širina 12 segmenata dvostrukih zuba, kao i interkanina i intermolarna širina. Merenja su vršena u programu OrthoPhoto4D, koji koristi četiri fotografije svakog merenog modela, QR kodove za automatizaciju, računa udaljenost kamere i koriguje greške merenja izazvane perspektivom. Merenja su poređena sa rezultatima dobijenim na modelima generisanim 3D skenerom. Rezultati Analiza rezultata snažno ukazuje na to da ne postoji statistički značajna razlika između dva metoda. Zabeležene razlike takođe nemaju klinički značaj, jer su srednje vrednosti do 0,2 mm za pojedinačne širine zuba, do približno 0,2 mm za segmente od dva zuba i ispod 0,3 mm za interkaninu i intermolarnu širinu. Sve zabeležene razlike su unutar očekivane greške merenja. Zaključak Opisani metod fotogrametrijskih merenja u programu OrthoPhoto4D se može koristiti u dijagnozi i planiranju ortodontske terapije.
PB  - Srpsko lekarsko društvo, Beograd
T2  - Srpski arhiv za celokupno lekarstvo
T1  - A novel method of photogrammetry measurements of study models in orthodontics
T1  - Novi metod fotogrametrijskih merenja studijskih modela u ortodonciji
VL  - 147
IS  - 1-2
SP  - 12
EP  - 18
DO  - 10.2298/SARH180419074A
ER  - 

@article{
author = "Arapović-Savić, Marijana and Savić, Mihajlo and Umićević-Davidović, Mirjana and Arbutina, Adriana and Nedeljković, Nenad and Glišić, Branislav",
year = "2019",
abstract = "Introduction/Objective Rapid developments in information technologies lead to the wider use of digital representations of dental study models in orthodontics. Most popular way of digitizing the models is to use a 3D scanner and then perform measurements on 3D models, which requires additional and expensive hardware and software resources. In this paper we present an alternative approach based on the use of photogrammetry in the newly developed OrthoPhoto4D software that calculates and corrects perspective distortion errors. Methods We measured individual tooth width for 24 teeth, 12 two-teeth segments as well as inter-molar and inter-canine distances on 50 models. Measurements are performed in OrthoPhoto4D software that uses four photographs of each model for measurements, uses QR codes for automation, calculates the camera position and corrects perspective distortion-caused errors in measurements. Obtained measurements are compared to ones obtained from models generated by structured light 3D scanner. Results Statistical analysis strongly indicates that there is no significant difference between the two methods. The recorded differences also have no clinical impact as they have mean values of 0.2 mm for individual tooth widths, approximately 0.2 mm for two teeth segments, and under 0.3 mm for both inter-canine and inter-molar distances. All recorded differences fall within the expected measurement error. Conclusion We concluded that the described photogrammetry measurements performed in OrthoPhoto4D can be used in diagnosis and therapy planning., Uvod/Cilj Brzi razvoj informacionih tehnologija doveo je do široke upotrebe digitalnih studijskih modela u ortodonciji. Najpopularniji način digitalizacije modela je korišćenje 3D skenera, a zatim i merenja na 3D modelima, što zahteva dodatne i skupe hardverske i softverske resurse. U ovom radu predstavljamo alternativni pristup zasnovan na korišćenju fotogrametrije u novorazvijenom softveru OrthoPhoto4D, koji izračunava i ispravlja greške nastale kao posledica perspektivne distorzije. Metod Na 50 studijskih modela merena je meziodistalna širina za 24 zuba, širina 12 segmenata dvostrukih zuba, kao i interkanina i intermolarna širina. Merenja su vršena u programu OrthoPhoto4D, koji koristi četiri fotografije svakog merenog modela, QR kodove za automatizaciju, računa udaljenost kamere i koriguje greške merenja izazvane perspektivom. Merenja su poređena sa rezultatima dobijenim na modelima generisanim 3D skenerom. Rezultati Analiza rezultata snažno ukazuje na to da ne postoji statistički značajna razlika između dva metoda. Zabeležene razlike takođe nemaju klinički značaj, jer su srednje vrednosti do 0,2 mm za pojedinačne širine zuba, do približno 0,2 mm za segmente od dva zuba i ispod 0,3 mm za interkaninu i intermolarnu širinu. Sve zabeležene razlike su unutar očekivane greške merenja. Zaključak Opisani metod fotogrametrijskih merenja u programu OrthoPhoto4D se može koristiti u dijagnozi i planiranju ortodontske terapije.",
publisher = "Srpsko lekarsko društvo, Beograd",
journal = "Srpski arhiv za celokupno lekarstvo",
title = "A novel method of photogrammetry measurements of study models in orthodontics, Novi metod fotogrametrijskih merenja studijskih modela u ortodonciji",
volume = "147",
number = "1-2",
pages = "12-18",
doi = "10.2298/SARH180419074A"
}

Arapović-Savić, M., Savić, M., Umićević-Davidović, M., Arbutina, A., Nedeljković, N.,& Glišić, B.. (2019). A novel method of photogrammetry measurements of study models in orthodontics. in Srpski arhiv za celokupno lekarstvo
Srpsko lekarsko društvo, Beograd., 147(1-2), 12-18.
https://doi.org/10.2298/SARH180419074A

Arapović-Savić M, Savić M, Umićević-Davidović M, Arbutina A, Nedeljković N, Glišić B. A novel method of photogrammetry measurements of study models in orthodontics. in Srpski arhiv za celokupno lekarstvo. 2019;147(1-2):12-18.
doi:10.2298/SARH180419074A .

Arapović-Savić, Marijana, Savić, Mihajlo, Umićević-Davidović, Mirjana, Arbutina, Adriana, Nedeljković, Nenad, Glišić, Branislav, "A novel method of photogrammetry measurements of study models in orthodontics" in Srpski arhiv za celokupno lekarstvo, 147, no. 1-2 (2019):12-18,
https://doi.org/10.2298/SARH180419074A . .

TY  - JOUR
AU  - Arapović-Savić, Marijana
AU  - Savić, Mihajlo
AU  - Umićević-Davidović, Mirjana
AU  - Arbutina, Adriana
AU  - Nedeljković, Nenad
AU  - Glišić, Branislav
PY  - 2018
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/2367
AB  - Introduction Lundstrom segmental analysis is often used analysis in orthodontic diagnosis. It includes measurements of available and needed space in the arch in order to determine whether there is a lack or excess of space for proper teeth alignment. Measurements are traditionally performed on plaster study models, but with recent developments of computer-based systems, there is an increase in use of digital models in measuring process. The aim of this study was to present a photogrammetry based measurement approach that requires no specialized and expensive hardware and compare results with ones obtained on 3D scanned models. Material and method On 50 plaster study models measurements of 24 teeth, widths of 12 segments and Lundstrom segmental analysis were performed. 3D scanned study models were analyzed in the photogrammetry software OrthoPhoto4D on the set of four photographs of the study model in custom made measurement apparatus. The software corrects for finite distance of the camera and corrects errors due to perspective distortion. Results Statistical analysis performed on obtained measurements provided Bland-Altman plots that strongly suggested high degree of correspondence between the two measurements methods. Discrepancies for maxilla for individual segments were under 0.25 mm with standard deviation of up to 0.16 mm, and less than 1 mm and deviation of up to 0.4 mm for complete arch. For mandible the differences were up to 0.27 mm for segments with 0.15 mm deviation and 0.6 mm for complete arch with up to 0.24 mm deviation. Correlation coefficient was over 0.985 in all cases. Conclusions Both analyzed methods can be equally used in clinical practice.
AB  - Uvod Najčešća prostorna analiza koja se koristi u ortodontskoj dijagnostici je Lundstromova segmentna analiza. Na osnovu dobijenih rezultata merenja upoređuje se potreban i raspoloživ prostor u zubnom nizu i dobijaju informacije o višku ili manjku prostora za pravilan smeštaj zuba. Merenja se tradicionalno vrše na gipsanim studijskim modelima, ali je usled razvoja računarskih sistema sve prisutnija upotreba digitalnih reprezentacija modela u procesu merenja. Cilj ovog rada je bio da se predstavi fotogrametrijski pristup merenjima koji ne zahteva specijalizovan i skup hardver i dobijeni rezultati uporede sa merenjima na skeniranim 3D modelima. Metod Na 50 studijskih modela su merene meziodistalne širine 24 zuba, te širine 12 segmenata i izvršena je Lundstromova prostorna analiza. Merenja su vršena na 3D skeniranom modelu studijskim modelima i u fotogrametrijskom programu OrthoPhoto4D na osnovu četiri fotografije modela u namenski projektovanom držaču modela. Program uzima u obzir konačnu udaljenost kamere od modela i vrši korekcije grešaka nastalih usled perspektivne distorzije. Rezultati Provedena statistička analiza na prikupljenim merenjima i priloženi Bland-Altman grafici snažno sugerišu da postoji visok stepen saglasnosti između dva metoda merenja. Odstupanja za maksilu za pojedinačne segmente su iznosila do 0,25 mm sa standardnom devijacijom od 0,16 mm, za celu vilicu manje od 1 mm uz devijaciju od 0,4 mm, za mandibulu odstupanja za segmente iznose ispod 0,27 mm uz devijaciju od 0,15 mm, te za celu vilicu do 0,6 mm uz devijaciju od 0,24 mm. Koeficijenti korelacije su preko 0,985 u svim slučajevima. Zaključak Fotogrametrijski metod se može opravdano koristiti u kliničkoj praksi za dijagnostiku ortodontskih nepravilnosti.
PB  - Srpsko lekarsko društvo - Stomatološka sekcija, Beograd
T2  - Stomatološki glasnik Srbije
T1  - Photogrammetry based space analysis measurements in orthodontic diagnosis
T1  - Primena fotogrametrije za prostorne analize u ortodontskoj dijagnostici
VL  - 65
IS  - 2
SP  - 78
EP  - 88
DO  - 10.2478/sdj-2018-0008
ER  - 

@article{
author = "Arapović-Savić, Marijana and Savić, Mihajlo and Umićević-Davidović, Mirjana and Arbutina, Adriana and Nedeljković, Nenad and Glišić, Branislav",
year = "2018",
abstract = "Introduction Lundstrom segmental analysis is often used analysis in orthodontic diagnosis. It includes measurements of available and needed space in the arch in order to determine whether there is a lack or excess of space for proper teeth alignment. Measurements are traditionally performed on plaster study models, but with recent developments of computer-based systems, there is an increase in use of digital models in measuring process. The aim of this study was to present a photogrammetry based measurement approach that requires no specialized and expensive hardware and compare results with ones obtained on 3D scanned models. Material and method On 50 plaster study models measurements of 24 teeth, widths of 12 segments and Lundstrom segmental analysis were performed. 3D scanned study models were analyzed in the photogrammetry software OrthoPhoto4D on the set of four photographs of the study model in custom made measurement apparatus. The software corrects for finite distance of the camera and corrects errors due to perspective distortion. Results Statistical analysis performed on obtained measurements provided Bland-Altman plots that strongly suggested high degree of correspondence between the two measurements methods. Discrepancies for maxilla for individual segments were under 0.25 mm with standard deviation of up to 0.16 mm, and less than 1 mm and deviation of up to 0.4 mm for complete arch. For mandible the differences were up to 0.27 mm for segments with 0.15 mm deviation and 0.6 mm for complete arch with up to 0.24 mm deviation. Correlation coefficient was over 0.985 in all cases. Conclusions Both analyzed methods can be equally used in clinical practice., Uvod Najčešća prostorna analiza koja se koristi u ortodontskoj dijagnostici je Lundstromova segmentna analiza. Na osnovu dobijenih rezultata merenja upoređuje se potreban i raspoloživ prostor u zubnom nizu i dobijaju informacije o višku ili manjku prostora za pravilan smeštaj zuba. Merenja se tradicionalno vrše na gipsanim studijskim modelima, ali je usled razvoja računarskih sistema sve prisutnija upotreba digitalnih reprezentacija modela u procesu merenja. Cilj ovog rada je bio da se predstavi fotogrametrijski pristup merenjima koji ne zahteva specijalizovan i skup hardver i dobijeni rezultati uporede sa merenjima na skeniranim 3D modelima. Metod Na 50 studijskih modela su merene meziodistalne širine 24 zuba, te širine 12 segmenata i izvršena je Lundstromova prostorna analiza. Merenja su vršena na 3D skeniranom modelu studijskim modelima i u fotogrametrijskom programu OrthoPhoto4D na osnovu četiri fotografije modela u namenski projektovanom držaču modela. Program uzima u obzir konačnu udaljenost kamere od modela i vrši korekcije grešaka nastalih usled perspektivne distorzije. Rezultati Provedena statistička analiza na prikupljenim merenjima i priloženi Bland-Altman grafici snažno sugerišu da postoji visok stepen saglasnosti između dva metoda merenja. Odstupanja za maksilu za pojedinačne segmente su iznosila do 0,25 mm sa standardnom devijacijom od 0,16 mm, za celu vilicu manje od 1 mm uz devijaciju od 0,4 mm, za mandibulu odstupanja za segmente iznose ispod 0,27 mm uz devijaciju od 0,15 mm, te za celu vilicu do 0,6 mm uz devijaciju od 0,24 mm. Koeficijenti korelacije su preko 0,985 u svim slučajevima. Zaključak Fotogrametrijski metod se može opravdano koristiti u kliničkoj praksi za dijagnostiku ortodontskih nepravilnosti.",
publisher = "Srpsko lekarsko društvo - Stomatološka sekcija, Beograd",
journal = "Stomatološki glasnik Srbije",
title = "Photogrammetry based space analysis measurements in orthodontic diagnosis, Primena fotogrametrije za prostorne analize u ortodontskoj dijagnostici",
volume = "65",
number = "2",
pages = "78-88",
doi = "10.2478/sdj-2018-0008"
}

Arapović-Savić, M., Savić, M., Umićević-Davidović, M., Arbutina, A., Nedeljković, N.,& Glišić, B.. (2018). Photogrammetry based space analysis measurements in orthodontic diagnosis. in Stomatološki glasnik Srbije
Srpsko lekarsko društvo - Stomatološka sekcija, Beograd., 65(2), 78-88.
https://doi.org/10.2478/sdj-2018-0008

Arapović-Savić M, Savić M, Umićević-Davidović M, Arbutina A, Nedeljković N, Glišić B. Photogrammetry based space analysis measurements in orthodontic diagnosis. in Stomatološki glasnik Srbije. 2018;65(2):78-88.
doi:10.2478/sdj-2018-0008 .

Arapović-Savić, Marijana, Savić, Mihajlo, Umićević-Davidović, Mirjana, Arbutina, Adriana, Nedeljković, Nenad, Glišić, Branislav, "Photogrammetry based space analysis measurements in orthodontic diagnosis" in Stomatološki glasnik Srbije, 65, no. 2 (2018):78-88,
https://doi.org/10.2478/sdj-2018-0008 . .