Evaluation of contributions of orthodontic mini-screw design factors based on FE analysis and the Taguchi method

Lin, Chun Li; Yu, Jian; Liu, Heng Liang; Lin, Chih Hao; Lin, Yang

doi:10.1016/j.jbiomech.2010.03.043

Cited by 30 publications

(29 citation statements)

References 20 publications

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“…26 Surface modification by sandblasting and acid etching has a beneficial effect on implant biocompatibility. 12,[27][28][29] In the present study, even with the surface visibly smooth both to the naked eye and at 503 magnification ( Figure 4), osteoblast proliferation occurred within the irregularities observed by SEM, favoring cell 12,13,18 No significant difference was observed in terms of osteoblast proliferation onto the Neodent and Morelli mini-implants; however, only for the latter was the proliferation different from that on the control, polystyrene. This result may be related to the surface similarity between the Neodent mini-implant and polystyrene (used as the control in cell-culture studies) regarding surface energy.…”

Section: Discussionmentioning

confidence: 52%

In vitro study of human osteoblast proliferation and morphology on orthodontic mini-implants

Bueno

Basting

2015

The Angle Orthodontist

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Section: Discussionmentioning

confidence: 52%

In vitro study of human osteoblast proliferation and morphology on orthodontic mini-implants

Bueno

Basting

2015

The Angle Orthodontist

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“…Strain is accepted as the mechanical stimuli for bone remodeling around an implant. 22 Frost (1994) 23 suggested that bone remodeling is initiated at a critical strain level (the mechano-static theory) and that micro damage arises in normal lamellar bone when the strain exceeds 4000 micro strain. 23 An optimal mini-screw design for avoiding failure and minimizing the strain value in the surrounding bone to reduce screw loosening is needed.…”

Section: Discussionmentioning

confidence: 99%

“…23 An optimal mini-screw design for avoiding failure and minimizing the strain value in the surrounding bone to reduce screw loosening is needed. 22 More living tissue studies are required for a better understanding of secondary stability, which includes osteo-integration and physiological reactions of the bone to external forces. Otherwise, suitable torque values should be continuously for evaluated to minimize bone damage in the human body and act as sufficient anchorage for orthodontic forces within a range that the bone sufficient support.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of insertion torque of different orthodontic miniscrews: An in vitro study

Al-Obaidi

Nadir

2016

ZJMS

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Background and objective: The purpose of this study was to evaluate the torque insertion for drill and non drill techniques of two commercially available miniscrews. Methods: Eighty mini screws (forty Dentos miniscrews/Korea and forty 3M miniscrews/ USA), having the same length and diameter, were divided into two groups for each type. Two techniques, non-drill and drill, were used. In drill techniques, manufacturer recommended drill was used. Two bovine tibias were obtained. The first technique used pre drill hole, which was made in the bone using the recommended bur (1.0 diameter). The mini-screw was placed at 9 mm manually, then the remaining 1 mm was inserted through digital torque meter. The same procedure was repeated but without a pilot hole. Results: 3M miniscerws gave high torque insertion in two techniques. Conclusion: The shape, thread design and tip geometry of miniscerw play an important role in the torque insertion.

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“…The mini-screw form was designed to be as simple as possible to enable successful application of the study data to most commercially available mini-screws. The screw thread, known to have little impact on cortical bone strain (Lin et al, 2010), was not adopted as a variable in this finite element study model.…”

Section: Methodsmentioning

confidence: 99%

Stress distribution in the mini-screw and alveolar bone during orthodontic treatment: a finite element study analysis

Kuroda

Nishii

Okano

et al. 2014

Journal of Orthodontics

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Objective: This study aimed to investigate the reason for high failure rate of miniscrews during orthodontic treatment. We hypothesised that decreasing the length of the mini-screw outside the bone relative to the length inside the bone (outside/inside length ratio) and equalising it to the tooth crown-root ratio would lead to increased stability of the mini-screw against lateral load when assessed using finite element analysis. Methods:We analysed stress distribution of mini-screws in the cortical and trabecular bone and von Mises stress levels when a 2-N force was applied to the head of four miniscrews of 6, 8, 10 and 12 mm in length. The direction of the force was perpendicular to the major axis of screws. Results: Stress levels of screws in the cortical bone increased in proportion to the length of mini-screws outside the bone. The length of mini-screws inside the bone did not affect stress levels in the cortical bone. Conclusions: The results of this finite element analysis indicate that, to stabilise the mini-screw, controlling the screw length outside the bone is more important than controlling the outside/inside length ratio.

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Evaluation of contributions of orthodontic mini-screw design factors based on FE analysis and the Taguchi method

Cited by 30 publications

References 20 publications

In vitro study of human osteoblast proliferation and morphology on orthodontic mini-implants

In vitro study of human osteoblast proliferation and morphology on orthodontic mini-implants

Evaluation of insertion torque of different orthodontic miniscrews: An in vitro study

Stress distribution in the mini-screw and alveolar bone during orthodontic treatment: a finite element study analysis

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