Accuracy of orthodontic movements with 3D printed aligners: A prospective observational pilot study
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Objective: Owing to the availability of 3D software, scanners, and printers, clinicians are encouraged to produce in-office aligners. Recently, a new directprinting resin (Tera Harz TC-85DAC) has been introduced. Studies on its mechanical characteristics and biological effects have been published; however, evidence on its efficacy in orthodontic treatment remains scarce. This pilot study aimed to investigate the accuracy of teeth movement achieved with directprinted aligners. Methods: Seventeen patients (eight males and nine females) with a mean age of 27.67 ± 8.95 years, presenting with dental rotations < 30° and spaces/crowding < 5 mm, were recruited for this study. The teeth movement was planned starting from a T0 digital dental cast. The 3D direct-printed aligners were produced using Tera Harz TC-85DAC resin. Once the orthodontic treatment was completed, a final digital cast was obtained (T1). The planned teeth positions were then superimposed onto the T0 and T1 digital models. The differences between the programmed movements and the achieved overall torque, tip, rotation, and transverse dimensions were assessed using the paired t test or Wilcoxon’s signed rank test. Results: The overall accuracies for torque, tip, and rotation were 67.6%, 64.2%, and 72.0%, respectively. The accuracy of the change in transverse diameter was 99.6%. Conclusions: Within the limits of the present pilot study (difficulties with abnormally shaped teeth and use of attachments), it can be concluded that 3D printed aligners can be successfully printed in-house and utilized for mildly crowded cases, with a comparable accuracy of tooth movement to that of other aligners.
Abstract
Objective: Owing to the availability of 3D software, scanners, and printers, clinicians are encouraged to produce in-office aligners. Recently, a new directprinting resin (Tera Harz TC-85DAC) has been introduced. Studies on its mechanical characteristics and biological effects have been published; however, evidence on its efficacy in orthodontic treatment remains scarce. This pilot study aimed to investigate the accuracy of teeth movement achieved with directprinted aligners. Methods: Seventeen patients (eight males and nine females) with a mean age of 27.67 ± 8.95 years, presenting with dental rotations < 30° and spaces/crowding < 5 mm, were recruited for this study. The teeth movement was planned starting from a T0 digital dental cast. The 3D direct-printed aligners were produced using Tera Harz TC-85DAC resin. Once the orthodontic treatment was completed, a final digital cast was obtained (T1). The planned teeth positions were then superimposed onto the T0 and T1 digital models. The differences between the programmed movements and the achieved overall torque, tip, rotation, and transverse dimensions were assessed using the paired t test or Wilcoxon’s signed rank test. Results: The overall accuracies for torque, tip, and rotation were 67.6%, 64.2%, and 72.0%, respectively. The accuracy of the change in transverse diameter was 99.6%. Conclusions: Within the limits of the present pilot study (difficulties with abnormally shaped teeth and use of attachments), it can be concluded that 3D printed aligners can be successfully printed in-house and utilized for mildly crowded cases, with a comparable accuracy of tooth movement to that of other aligners.
참고문헌 (25)
- Bilello G, "Accuracy evaluation of orthodontic movements with aligners : a prospective observational study", Prog Orthod, 23, pp.12~ (2022)[DOI]
- Ballard ML, "Asymmetry in tooth size: a factor in the etiology, diagnosis and treatment of malocclusion", Angle Orthod, 14, pp.67~70 (1944)
- Sheridan JJ, "Air-rotor stripping", J Clin Orthod, 19, pp.43~59 (1985)
- Kesling HD, "The philosophy of tooth positioning appliance", Am J Orthod Oral Surg, 31, pp.297~304 (1945)[DOI]
- Papadimitriou A, "Clinical effectiveness of Invisalign® orthodontic treatment : a systematic review", Prog Orthod, 19, pp.37~ (2018)[DOI]
- Rossini G, "Efficacy of clear aligners in controlling orthodontic tooth movement : a systematic review", Angle Orthod, 85, pp.881~889 (2015)[DOI]
- Jaber ST, "The effectiveness of in-house clear aligners and traditional fixed appliances in achieving good occlusion in complex orthodontic cases : a randomized control clinical trial", Cureus, 14, pp.e30147~ (2022)[DOI]
- Peter E, "Are clear aligners environment friendly?", Am J Orthod Dentofacial Orthop, 161, pp.619~620 (2022)[DOI]
- Can E, "In-house 3D-printed aligners : effect of in vivo ageing on mechanical properties", Eur J Orthod, 44, pp.51~55 (2022)[DOI]
- Hertan E, "Force profile assessment of direct-printed aligners versus thermoformed aligners and the effects of non-engaged surface patterns", Prog Orthod, 23, pp.49~ (2022)[DOI]
- Lee SY, "Thermo-mechanical properties of 3D printed photocurable shape memory resin for clear aligners", Sci Rep, 12, pp.6246~ (2022)[DOI]
- Pratsinis H, "Cytotoxicity and estrogenicity of a novel 3-dimensional printed orthodontic aligner", Am J Orthod Dentofacial Orthop, 162, pp.e116~e122 (2022)[DOI]
- Huanca Ghislanzoni LT, "Evaluation of tip and torque on virtual study models : a validation study", Prog Orthod, 14, pp.19~ (2013)[DOI]
- Vasilakos G, "Assessment of different techniques for 3D superimposition of serial digital maxillary dental casts on palatal structures", Sci Rep, 7, pp.5838~ (2017)[DOI]
- Santos RF, "Validity and reliability of a trigonometry-based method for the measurement of tooth movement on digital models", Dental Press J Orthod, 26, pp.e2119148~ (2021)[DOI]
- Castroflorio T, "Predictability of orthodontic tooth movement with aligners : effect of treatment design", Prog Orthod, 24, pp.2~ (2023)[DOI]
- Willi A, "Leaching from a 3D-printed aligner resin", Eur J Orthod, 45, pp.244~249 (2023)[DOI]
- Al-Dboush RE, "Do orthodontic treatments using fixed appliances and clear aligner achieve comparable quality of occlusal contacts?", Evid Based Dent, 23, pp.160~161 (2022)[DOI]
- Lombardo L, "Predictability of orthodontic movement with orthodontic aligners : a retrospective study", Prog Orthod, 18, pp.35~ (2017)[DOI]
- Nguyen CV, "The Invisalign system", pp.12~32 (2006), Quintessence Publishing Company, Ltd
- Grünheid T, "How accurate is Invisalign in nonextraction cases? Are predicted tooth positions achieved?", Angle Orthod, 87, pp.809~815 (2017)[DOI]
- 2.0.CO;2,
- Simon M, "Treatment outcome and efficacy of an aligner technique--regarding incisor torque, premolar derotation and molar distalization", BMC Oral Health, 14, pp.68~ (2014)[DOI]
- Sachdev S, "Accuracy of tooth movement with in-house clear aligners", J World Fed Orthod, 10, pp.177~182 (2021)[DOI]
- Zinelis S, "Comparative analysis of mechanical properties of orthodontic aligners produced by different contemporary 3D printers", Orthod Craniofac Res, 25, pp.336~341 (2022)[DOI]