Root resorptions associated with canine retraction treatment

Jiang, Feifei; Jie, Cheng; Kula, Katherine; Gu, Huiying; Du, Yansheng; Eckert, George J.

doi:10.1016/j.ajodo.2017.01.023

Cited by 27 publications

(28 citation statements)

References 45 publications

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“…Jiang et al, 13 in 2017 studied external apical RR using CBCT because it is an accurate imaging technique and provides reliable results. There are many factors that cause RR, such as the magnitude of orthodontic force applied, treatment technique and method of measuring RR.…”

Section: Discussionmentioning

confidence: 99%

Comparative study of root resorption between two methods for accelerated orthodontic tooth movement

2018

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Objective: The aim of this study was to assess apical root resorption (RR) following the application of micro-osteoperforation (MOP) and piezocision (PzC) assisted orthodontics for the acceleration of tooth movement (TM). Materials and Methods: A total number of 16 patients seeking orthodontic therapy were included in this study. All patients had undergone 1 st premolars extraction and were indicated for canine retraction. These patients were divided into two groups; one was treated using MOP in one side while the other side served as control. In the other group PzC was performed in one side with no intervention done on the other side. Cone-beam Computed Tomography (CBCT) scans were obtained for every patient before and after canine retraction in order to evaluate amount of RR. Results: In the MOP group, there was no significant difference in canine root length between experimental and control sides. Whereas, in the PzC group, there was a statistically significant decrease in root length in the experimental side compared with the control side. When comparing both groups, the experimental PzC side showed a statistically significant decrease in root length compared to experimental MOP side postoperatively. Conclusion: Experimental PzC showed statistically significant decreases in canine root length compared to both experimental MOP and control side after canine retraction.

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Section: Discussionmentioning

confidence: 99%

Comparative study of root resorption between two methods for accelerated orthodontic tooth movement

2018

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“…Jiang et al 13 in 2017 studied external apical RR using CBCT because it is an accurate imaging technique and has reliable results. There are many factors that cause RR, such as magnitude of orthodontic force applied, treatment technique and method of measuring RR.…”

Section: Discussionmentioning

confidence: 99%

“…Jiang et al investigated multiple factors that may cause apical RR during canine retraction treatment and reported that older patients tend to have more tendency to external apical RR after canine retraction. 13 It is also not clear whether the gender of the patient is a factor increasing the liability of external apical RR. However results found by Jiang et al showed that female patients tend to be more likely to experience apical RR but that was not statistically significant.…”

Section: Discussionmentioning

confidence: 99%

“…However results found by Jiang et al showed that female patients tend to be more likely to experience apical RR but that was not statistically significant. 13 Alikhani et al 9 in 2013 studied the effect of MOP on rate of TM after canine retraction and found that no patient in his clinical study showed any signs of RR in routine panoramic radiograph taken as final record. However, panoramic or periapical radiographs are not accurate for measuring RR and recommended further studies to investigate the effect of accelerated orthodontic TM on apical RR using more accurate radiographic methods.…”

Section: Discussionmentioning

confidence: 99%

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Comparative study of root resorption between two methods for accelerated tooth movement

Elkalza

Rateb

2018

Egyptian Orthodontic Journal

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Objective: The aim of this study was to assess apical root resorption (RR) following the application of micro-osteoperforation (MOP) and piezocision (PzC) assisted orthodontics for acceleration of tooth movement (TM). Materials and Methods: A total number of 16 patients seeking orthodontic therapy were included in this study. All patients undergone 1 st premolars extraction and were indicated for canine retraction afterwards. These patients were divided into 2 groups; group A was treated using MOP in one side and the other side serves as control. While in group B PzC was performed in one side and no intervention was done to the other side. CBCT scans were taken for every patient before and after canine retraction in order to evaluate amount of RR in both groups. Results: In MOP group, there was no significant difference in canine root length between experimental and control sides. Whereas, in PzC group, there was statistically significant decrease in root length in experimental side than the control side. When comparing both groups, experimental PzC side showed statistically significant decrease in root length compared to experimental MOP side postoperatively. Conclusion: Experimental PzC showed statistically significant decrease in canine root length compared to experimental MOP and control side after canine retraction.

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“…Elastic modulus 66 GPa [20] 66 GPa [20] 66 GPa [20] 69 GPa [21] 69 GPa [21] 69 GPa [21] 90 GPa [22] 90 GPa [22] 90 GPa [22] 157.6 GPa [17] 157.6 GPa [17] 157.6 GPa [17] 168 GPa [20] 168 GPa [20] 168 GPa [20] 200 GPa [23] 200 GPa [23] 200 GPa [23] Cross-section 0.016″ × 0.022″ [24] 0.016″ × 0.022″ [24] 0.016″ × 0.022″ [24] 0.017″ × 0.025″ [24] 0.017″ × 0.025″ [24] 0.017″ × 0.025″ [24] 0.018″ × 0.025″ [24] 0.018″ × 0.025″ [24] 0.018″ × 0.025″ [24] 0.019″ × 0.025″ [25] 0.019″ × 0.025″ [25] 0.019″ × 0.025″ [25] Activation force 1-3 N at a 0.5-N interval 1-3 N at a 0.5-N interval 1-3 N at a 0.5-N interval the leg step distance and elastic modulus ( Fig. 5d-e).…”

Section: Variations Vertical Loop L-loop T-loopmentioning

confidence: 99%

Finite element analysis of archwire parameters and activation forces on the M/F ratio of vertical, L- and T-loops

Cai¹

2020

BMC Oral Health

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Background: The ability of a loop to generate a certain moment/force ratio (M/F ratio) can achieve the desired tooth movement in orthodontics. The present study aimed to investigate the effects of elastic modulus, crosssectional dimensions, loop configuration geometry dimensions, and activation force on the generated M/F ratio of vertical, L-and T-loops.Methods: A total of 120 three-dimensional loop models were constructed with the Solidworks 2017 software and used for simulating loop activation with the Abaqus 6.14 software. Six vertical loop variations, 9 L-loop variations, and 9 T-loop variations were evaluated. In each group, only one parameter was variable [loop height, ring radius, leg length, leg step distance, legs distance, upper length, different archwire materials (elastic modulus), crosssectional dimension, and activation force].Results: The simulation results of the displacement and von Mises stress of each loop were investigated. The maximum displacement in the height direction was recorded to calculate the M/F ratio. The quantitative change trends in the generated M/F ratio of the loops with respect to various variables were established.Conclusions: Increasing the loop height can increase the M/F ratio of the loop. This increasing trend is, especially, much more significant in T-loops compared with vertical loops and L-loops. In vertical loops, increasing the ring radius is much more effective than increasing the loop height to increase the M/F ratio of the loop. Compared with SS, TMA archwire loops can generate a higher M/F ratio due to its lower elastic modulus. Loops with a small crosssectional area and high activation force can generate a high M/F ratio. The introduction of a leg step to loops does not increase the M/F ratio of loops.

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Root resorptions associated with canine retraction treatment

Cited by 27 publications

References 45 publications

Comparative study of root resorption between two methods for accelerated orthodontic tooth movement

Comparative study of root resorption between two methods for accelerated orthodontic tooth movement

Comparative study of root resorption between two methods for accelerated tooth movement

Finite element analysis of archwire parameters and activation forces on the M/F ratio of vertical, L- and T-loops

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