Recent Research Projects

1. Quantification and manipulation of 3D orthodontic load systems

Relevant publications

  • Chen, J., Katona, TR, Markham, D, “Effects of Geometric Changes of T-loop Spring on Its Loads” The Angle Orthodontics, Vol. 70, No 1, 2000
  • Qian, H., Chen, J., Katona, T.R., “The influence of PDL principal fibers in a 3-dimensional analysis of orthodontic tooth movement” American Journal of Orthodontics and Dentofacial Orthopedics, Vol. 120, No. 3, 2001
  • Katona, TR, Le, Y, and Chen, J., “The effects of first- and second-order gable bends on forces and moments generated by triangular loops”, American Journal of Orthodontics and Dentofacial Orthopedics, Am J Orthod Dentofacial Orthop 2006;129:54-59
  • Chen, J., Bulucea, I., Katona, T., Ofner, S. “Complete orthodontic load systems on teeth in a continuous full archwire - The role of triangular loop position,” Am J Orthod Dentofacial Orthop, 132(2): p. 143 e142-148, 2007
  • Viecilli, R, Chen, J., Katona, T., Roberts, W.E., “The Force System Generated by an Adjustable Molar Root Movement Mechanism,” Am J Orthod Dentofacial Orthop. 135(2):165-73, 2009
  • Meyer, BN, Chen, J., and Katona, TR, “Does the center of resistance depend on the direction of tooth movement? American Journal of Orthodontics and Dentofacial Orthopedics, Vol, 137, issue 3, page 345-361, 2010
  • Yadav, S., Chen, J., Jiang, F., “Comparison of the force systems of three appliances on palatally impacted canine” Am J Orthod Dentofacial Orthop. 2011 Feb; 139(2):206-13
  • Chen, J., Isikbay, S., Brizendine, E., “Quantification of 3D Orthodontic Force Systems of T-loop Archwires” Angle Orthodontics 2010 Jul; 80(4):566-70
  • Gajda, S., Chen, J. “Comparison of Three-Dimensional Orthodontic Load Systems of Different Commercial Archwires for Space Closure.” Angle Orthodontist 2012; 82(2):333-9
  • Kroczek, C, Kula, K., Fu, T., and Chen, J. “Comparison of the orthodontic load systems created with elastomeric power chain to close extraction spaces on different rectangular archwires” Am J Orthod Dentofacial Orthop. Volume 141, Issue 3 , Pages 262-268, March 2012
  • Yadav, S., Chen, J., Upadhyay, M., Roberts, E., and Nanda, R., “Three-dimensional quantification of the force system involved in a palatally impacted canine using a cantilever spring design” Orthodontics (Chic.). 2012;13(1):22-33
  • Xia, Z., Chen, J., “Biomechanical Validation of an Artificial Tooth-PDL-Bone Complex for in vitro Orthodontic Load Measurement” Angle Orthodontists, 2013;83(3):410-7
  • Mittal, N., Xia, Z, Chen, J., Stewart, K.T., and Liu, S.S., “Three-dimensional quantification of pretorques nickel-titanium wires in edgewise and prescription brackets” Angle Orthodontists 2013; 83(3):484-90
  • Xia, Z., Chen, J., Jiang, F., Li, S., Viecilli, R.F., and Liu, S., “Load System of Segmental T-Loops for Canine Retraction” the American Journal of Orthodontics and Dentofacial Orthopedics, 2013 Oct;144(4):548-56 PMC3829684
  • Yunfeng Liu, Nan Ru, Jie Chen, Sean Shih-Yao Liu and Wei Peng, ”Finite Element Modeling for Orthodontic Biomechanical Simulation Based on Reverse Engineering: A Case Study” Research Journal of Applied Sciences, Engineering and Technology 6(17): 3267-3276, 2013
  • Katona, T, Isikbay, S. and Chen, J. “Effects of 1st and 2nd order gable bends on the 3D orthodontic load systems produced by T-loop archwires” the Angle Orthodontists, 2014 Mar;84(2):350-7. PMID: 23987243, PMCID: PMC4091840
  • Katona, T, Isikbay, S. and Chen, J. “An analytical approach to 3D orthodontic load systems” the Angle Orthodontists, 2014 Sep;84(5):830-8 PMID: 24605915, PMCID: PMC4149860
  • Liu, Y.F., Zhang, P.Y., Zhang, Q.F., Zhang, J.X., Chen, J. “Digital design and fabrication of simulation model for measuring orthodontic force” Bio-Medical Materials and Engineering (2014);24(6):2265-71
  • Liu, Y., Jiang, F., and Chen, J., “Can interfaces at bracket-wire and between teeth in multi-teeth finite element model be simplified?” Int J Numer Method Biomed Eng. 2019 Mar; 35(3): e3169. doi: 10.1002/cnm.3169. Epub 2018 Dec 10
  • Liu, Y, Jian-lei Wu, Shan-ling Song, Lixin Xu, Jie Chen, Wei Peng, “Thermo-Mechanical Properties of Glass Fiber Reinforced Shape Memory Polyurethane for Orthodontic Application” Journal of Materials Science: Materials in Medicine, 29:148, 2018
  • Bin Lin, Feifei Jiang, Jie Chen, Jiaxing Liang, “A Comparison of the Ligation Torque Expression of a Ribbonwise Bracket–Archwire Combination and a Conventional Combination: A Primary Study”, International Journal of Clinical Practice, Volume 2022, Article ID 9251172, 8 pages
  • Wang, D., Turkkahraman, H., Chen, J., Liu, Y., “Quantification of Orthodontic Loads on Teeth in Correction of Canine Overeruption Cases Using Different Archwire Designs,” American Journal of Orthodontics & Dentofacial Orthopedics, Volume 163, Issue 1, Pages e13-e21, January 2023

2. Quantification of clinical 3D tooth displacement using CT images or dental records

Relevant publications

  • Chen, J., Li, S., and Fang, S., “Quantification of Tooth Displacement from Cone Beam CT images” the American Journal of Orthodontics and Dentofacial Orthopedics, 2009 Sep;136(3):393-400
  • Li, S., Xia, Z, Liu, S., Eckert, G., and Chen, J., “Three-dimensional Canine Displacement Patterns in Response to Translation and Controlled Tipping Retraction Strategies” the Angle Orthodontists, 2015, Jan: 85(1):18-25 PMID:24885592 PMCID: PMC4254379
  • Li, S., Chen, J., Kula, K., “A comparison of movement rate with different initial moment-to-force ratios”, Volume 156, Issue 2, August 2019, Pages 203-209

3. Quantification of orthodontic load systems based on dental records using finite element analysis

Relevant publications

  • Qian, H., Chen, J., Katona, T.R., “The influence of PDL principal fibers in a 3-dimensional analysis of orthodontic tooth movement” American Journal of Orthodontics and Dentofacial Orthopedics, Vol. 120, No. 3, 2001
  • Meyer, BN, Chen, J., and Katona, TR, “Does the center of resistance depend on the direction of tooth movement? American Journal of Orthodontics and Dentofacial Orthopedics, Vol, 137, issue 3, page 345-361, 2010
  • Viecilli, R. F., T. R. Katona, J. Chen, J. K. Hartsfield and W. E. Roberts. "Comparison of dentoalveolar morphology in C57B/6 and P2X7R KO mice for the development of biomechanical orthodontic models." 2009 Anat Rec. 292(2):292-8
  • Xia, Z., Jiang, F., and Chen, J. “Estimation of Periodontal Ligament's Equivalent Mechanical Parameters for Finite Element Modeling” American Journal of Orthodontics and Dentofacial Orthopedics, Volume 143, Issue 4, Pages 486-91, 2013
  • Xia, Z., Chen, J., Jiang, F., Li, S., Viecilli, R.F., and Liu, S., “Load System of Segmental T-Loops for Canine Retraction” the American Journal of Orthodontics and Dentofacial Orthopedics, 2013 Oct;144(4):548-56 PMC3829684
  • Yunfeng Liu, Nan Ru, Jie Chen, Sean Shih-Yao Liu and Wei Peng, “Finite Element Modeling for Orthodontic Biomechanical Simulation Based on Reverse Engineering: A Case Study” Research Journal of Applied Sciences, Engineering and Technology 6(17): 3267-3276, 2013
  • Jiang, F., Xia, Z. Li, S., Eckert, G., J. Chen, “Mechanical environment changes in root, periodontal ligament, and alveolar bone in response to two canine retraction treatment strategies”, Orthodontic and Craniofacial Research, 2015 Apr;18 Suppl 1:29-38, PMID:25865531, PMCID: PMC4460608
  • Jiang, F., Kula, K., and Chen, J., “Estimating the location of Center of Resistance of Canines” The Angle Orthodontists, September 24, 2015
  • Li, S., Chen, J., Kula, K., “A comparison of movement rate with different initial moment-to-force ratios”, American Journal of Orthodontics & Dentofacial Orthopedics, Volume 156, Issue 2, August 2019, Pages 203-209
  • Jiang F., Roberts W. E., Liu Y., Shafiee A., Chen J., “Mechanical Environment for Lower Canine T-Loop Retraction Compared to En-Masse Space Closure with a Power-Arm Attached to Either the Canine Bracket or the Archwire”, The Angle Orthodontist, 2020 Nov 1;90(6):801-810. doi: 10.2319/050120-377.1. PMID: 33378514
  • Wang, D., Akbari, A., Jiang, F., and Chen, J., “The effects of different types of periodontal ligament material models on stresses computed using Finite Element Models”, American Journal of Orthodontics & Dentofacial Orthopedics, 162(6):e328-e336. 2022

4. Quantification of root resorption and bone mineral density using CBCT images

Relevant publications

  • Viecilli, R, Katona, T, Chen, J, Hartsfield, JK, and Roberts, WE, “The Three-dimensional Mechanical Environment of Orthodontic Tooth Movement and Root Resorption,” Am J Orthod Dentofacial Orthop,133(6):791.e11-26, 2008
  • Jiang, F., Liu, S., Li, S., Xia, Z., Kula, K., Eckert, G., and Chen, J., “Hounsfield Unit Change in Root and Alveolar Bone during Canine Retraction”, AJODO, 2015 Apr;147(4):445-53, PMID: 25836004, PMCID: PMC4385197
  • Jiang, F., Kula, K., Du, Y., Gu, H., Eckert, G., Chen, J., “Root Resorptions Associated with Canine Retraction Treatment American Journal of Orthodontics & Dentofacial Orthopedics” Am J Orthod Dentofacial Orthop. 2017 Sep;152(3):348-354. doi: 10.1016/j.ajodo.2017.01.023.

5. Optical effects on orthodontic tooth movement

Relevant publications

  • Jiang, F., Luo, L., Chen, J., Alauddin, S., and Grande, J., “Light transmittance of the periodontium”, Lasers in Dental Science, Vol. 1, Issue 2-4, pp 107-115, 2017
  • Na, S., TruongVo, T., Jiang, F., Joll, J., Guo, Y., Utreja, A., and Chen, J., “Dose Analysis of Photobiomodulation Therapy on Bone Cells?” Accepted by the Journal of Biomedical Optics, June 2018

6. Accelerated orthodontic tooth movement

Relevant publications

  • Akbari, A., Turkkahraman, Chen, J., Yadav, S., “Vibrational Force on Accelerating Orthodontic Tooth Movement: A Systematic Review and Meta-Analysis”, European Journal of Dentistry, doi:10.1055/s-0042-1758070, 2022
  • Akbari A., Dongcai Wang, and Chen J., “Peak Loads on Teeth from Generic Tray of Vibrational Device for Accelerating Tooth Movement”, American Journal of Orthodontics & Dentofacial Orthopedics, 8/19/2021

7. Aligner technology

Relevant publications

  • Lear, M., Turkkahraman, H., Akbari, A., Chen, J., In Vitro Comparison of Direct Attachment Shape and Size on The Orthodontic Forces and Moments Generated by Thermoplastic Aligners During Expansion, Orthodontics and Craniofacial Research, Volume28, Issue2 April 2025, Pages 242-252, , http://doi.org/10.1111/ocr.12865, 9/25/2024
  • Bojrab, A, Akbari, A., Lear M., Magura J., Eckert G., Chen J., Conley S., and Turkkahraman H., “In vitro evaluation of the effects of direct attachments’ shape and location on the forces and moments generated by thermoplastic aligners during extrusion”, Orthodontics and Craniofacial Research, Volume28, Issue2, April 2025, Pages 371-378
  • Janine Magura, Amin Akbari, Megann Lear, Alexandra Bojrab, George Eckert, Jie Chen, R. Scott Conley, Hakan Turkkahraman, “In vitro comparison of the effects of direct attachment shape and location on forces and moments generated by thermoplastic aligners during simulated torque movement”, International Orthodontics, Volume 23, Issue 2, June 2025, 100982
  • W. Eugen Roberts, Chris H Chang, DDS, PhD; Chen, J., PhD; Naphthali Brezniak, MD, DMD, MSD; Sumit Yadav, BDS, MDS, PhD, “Integrating Skeletal Anchorage into Fixed and Aligner Biomechanics”, Journal of the World Federation of Orthodontists, 4/15/2022, Aug;11(4):95-106.