Stress distribution pattern in a root of maxillary central incisor having various root morphologies

Kamble, Ranjit; Lohkare, Sameer; Hararey, Pushpa V; Mundada, Ram

doi:10.2319/083111-560.1

Cited by 47 publications

(36 citation statements)

References 11 publications

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“…Dilacerated roots as observed in the incisor root finite element models proposed by Kamble et al and Oyama et al[18,19] potentially led to an altered distribution of the stress when forces were applied to teeth during orthodontic tooth movement.…”

Section: Discussionmentioning

confidence: 99%

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Three-dimensional characterization of root morphology for maxillary incisors

et al. 2017

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The aim of this study was to test the reproducibility of three-dimensional (3D) surface models of maxillary incisors and to propose a characterization of root morphology. The sample was comprised of pre-treatment cone-beam computed tomography (CBCT) images of fifty-five patients. The CBCTs were used to construct 3D surface models of the maxillary incisors. The reproducibility of surface models was tested by repeated construction of them by two observers. A 3D surface model that corresponded to the average of all lateral and all central incisors was generated. 3D surface distances and vector differences were calculated for each individual tooth and the average of the teeth considered. The corresponding points on the 3D surface mesh for each subgroup were compared statistically to those of the neutral subgroup using shape analysis MANCOVA and Hotelling’s t-statistic (p < 0.05). Repeated construction of surface models demonstrated adequate inter-rater reproducibility. The distribution of 3D models into root morphology subgroups was: blunt (11% and 26% of the central and lateral incisors, respectively), conical (15% of the central incisors), long (27% and 20% of the central and lateral incisors, respectively), and short (15% and 4% of the central and lateral incisors, respectively). Compared to the neutral average, statistically significant differences in root morphology were found for blunt, long, conical, and short central incisors and for blunt, long, and short lateral incisors. We can conclude that 3D surface models construction for upper incisors is reproducible. 3D shape analysis using CBCT images allows a phenotypic characterization of incisor root morphology.

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Section: Discussionmentioning

confidence: 99%

“…Orthodontic patients with sharp, pointed (triangle-shaped) roots that require premolar extraction, however, have a greater risk of severe root resorption[17]. Therefore, interest in variability in root morphology has increased recently[18,19]. …”

Section: Introductionmentioning

confidence: 99%

Three-dimensional characterization of root morphology for maxillary incisors

et al. 2017

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“…As a result, the actual stress distribution pattern within the PDL plays an important role in the initiation of alveolar remodeling and resultant bone or root resorption. 51,52 Because of the stress distribution pattern within the PDL 52 in conjunction with the results on osteoclastic recruitment and cell cycle, 48,49 it may be indicated that certain time intervals are required for the cells to perceive stress alterations and respond with osteoclast activation and resorptive activity. Consecutively, buccopalatal alterations in force direction, as produced in this study by jiggling forces, could result in alternating loading and unloading conditions within the PDL, thus compensating for the destructive effects of continuous unidirectional forces in bone and subsequent root resorption.…”

Section: Discussionmentioning

confidence: 99%

Physical properties of root cementum: Part 25. Extent of root resorption after the application of light and heavy buccopalatal jiggling forces for 12 weeks: A microcomputed tomography study

Eross

Türk

Elekdağ-Türk

et al. 2015

American Journal of Orthodontics and Dentofacial Orthopedics

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“…Ammar et al loaded forces with various magnitudes and directions to the mandibular left canine to study the stress in PDL and bone. Kamble et al applied orthodontic forces in various directions to the tooth axis at the bracket level to investigate stress distribution in the roots of maxillary central incisors. Jeon et al applied force at the center of the buccal crown surface of maxillary first molar to study the alveolar bone loss.…”

Section: Introductionmentioning

confidence: 99%

Simulation of orthodontic force of archwire applied to full dentition using virtual bracket displacement method

Zhang

Gan

Zhao

et al. 2019

Numer Methods Biomed Eng

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Objective Orthodontic force simulation of tooth provides important guidance for clinical orthodontic treatment. However, previous studies did not involve the simulation of orthodontic force of archwire applied to full dentition. This study aimed to develop a method to simulate orthodontic force of tooth produced by loading a continuous archwire to full dentition using finite element method. Method A three‐dimensional tooth‐periodontal ligament‐bone complex model of mandible was reconstructed from computed tomography images, and models of brackets and archwire were built. The simulation was completed through two steps. First, node displacements of archwire before and after loading were estimated through moving virtual brackets to drive archwire deformation. Second, the obtained node displacements were loaded to implement the loading of archwire, and orthodontic force was calculated. An orthodontic force tester (OFT) was used to measure orthodontic force in vitro for the validation. Results After the simulation convergence, archwire was successfully loaded to brackets, and orthodontic force of teeth was obtained. Compared with the measured orthodontic force using the OFT, the absolute difference of the simulation results ranged from 0.5 to 22.7 cN for force component and ranged from 2.2 to 80.0 cN•mm for moment component, respectively. The relative difference of the simulation results ranged from 2.5% to 11.0% for force component, and ranged from 0.6% to 14.7% for moment component, respectively. Conclusions The developed orthodontic force simulation method based on virtual bracket displacement can be used to simulate orthodontic force provided by the archwire applied to full dentition.

show abstract

Stress distribution pattern in a root of maxillary central incisor having various root morphologies

Cited by 47 publications

References 11 publications

Three-dimensional characterization of root morphology for maxillary incisors

Three-dimensional characterization of root morphology for maxillary incisors

Physical properties of root cementum: Part 25. Extent of root resorption after the application of light and heavy buccopalatal jiggling forces for 12 weeks: A microcomputed tomography study

Simulation of orthodontic force of archwire applied to full dentition using virtual bracket displacement method

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