Evaluation of miniscrew stability using an automatic embedding auxiliary skeletal anchorage device

Oga, Yasuhiko; Tomonari, Hiroshi; Kwon, Sangho; Kuninori, Takaharu; Yagi, Takakazu; Miyawaki, Shouichi

doi:10.2319/121117-857.1

Cited by 3 publications

(6 citation statements)

References 29 publications

(40 reference statements)

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“…Previously, animal experiments were conducted using a similar device without loading; however, no change in retention force was observed over time in either group. 7 Miniscrew stability reportedly improves when orthodontic force is applied to the miniscrew. 21 Increased semaphorin 3A (regulates peri-implant bone cell production), bone morphogenetic protein, and type I and III collagen were observed when loading was applied, which may be attributed to active bone remodeling around the miniscrew under a load.…”

Section: Discussionmentioning

confidence: 96%

“…Implantation spike depth (mm): length from spike apices to bone surface (Figure 5A,B). 7 Implantation spike depth was measured as a factor of miniscrew stability. 8 If the tip of the spike was broken off during specimen preparation, a virtual spike line was drawn and measured.…”

Section: Histomorphometric Analysismentioning

confidence: 99%

“…One 6 demonstrated that auxiliary device use increased miniscrew mechanical retention force by three to five times compared to nonuse. In an in vivo study, 7 miniscrews with auxiliary devices that received no external force improved mechanical retention by an approximately twofold measure at 4 and 8 weeks. Computed tomography images revealed that the auxiliary device tip was embedded in the cortical bone.…”

Section: Introductionmentioning

confidence: 97%

“…Computed tomography images revealed that the auxiliary device tip was embedded in the cortical bone. Using finite element analysis, and not through in vivo experiments, another study 8 reported that the application of ''washers'' (similar to those used in the previous studies 6,7 ) may reduce stress on the surrounding bone and decrease miniscrew displacement. Kim et al 9 used a similar device for intermaxillary fixation and applied a 150 g load.…”

Section: Introductionmentioning

confidence: 99%

“…3,5 Thus, novel skeletal anchorage that is less invasive and more stable under heavy loads is needed. Several studies [6][7][8][9] reported the development of skeletal anchorage with superior features using a combination of miniscrews and auxiliary devices. One 6 demonstrated that auxiliary device use increased miniscrew mechanical retention force by three to five times compared to nonuse.…”

Section: Introductionmentioning

confidence: 99%

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A novel auxiliary device enhances miniscrew stability under immediate heavy loading simulating orthopedic treatment

Yamagata¹,

Oga²,

Kwon³

et al. 2022

The Angle Orthodontist

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Objectives To evaluate miniscrew stability and perform a histomorphometric analysis of the bone around the miniscrew under a load corresponding to orthopedic force. Materials and Methods Thirty-two miniscrews were implanted into eight rabbit tibias. Auxiliary group rabbits received auxiliary devices with miniscrews (n = 8, 28 days; n = 8, 56 days), and those in the nonauxiliary control group received miniscrews without auxiliary devices (n = 8, 28 days; n = 8, 56 days). Elastics were placed between miniscrews to apply a load of 5 N. Miniscrew stability was evaluated using a Periotest. Bone-to-implant contact (BIC) and spike implantation depth were measured histomorphologically. Results Periotest values in the auxiliary group were significantly lower than those in the nonauxiliary group at all time periods. There was no significant difference in BIC between the auxiliary and nonauxiliary groups at 28 or 56 days postimplantation. The implantation spike depth in the auxiliary group was significantly greater at 56 days compared to that at 28 days. Newly formed bone was observed around the spike of the auxiliary device at 56 days. Conclusions The results suggest that the use of miniscrews in conjunction with auxiliary devices provides stable skeletal anchorage, which may be useful in orthopedic treatments.

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Section: Discussionmentioning

confidence: 96%

Section: Histomorphometric Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A novel auxiliary device enhances miniscrew stability under immediate heavy loading simulating orthopedic treatment

Yamagata¹,

Oga²,

Kwon³

et al. 2022

The Angle Orthodontist

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Effects of root contact length on the failure rate of anchor screw

et al. 2022

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Surface Treatment of Dental Mini-Sized Implants and Screws: A Systematic Review with Meta-Analysis

Figueiredo,

Travassos,

Nunes

et al. 2024

JFB

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Miniscrews are devices that allow for absolute skeletal anchorage. However, their use has a higher failure rate (10–30%) than dental implants (10%). To overcome these flaws, chemical and/or mechanical treatment of the surface of miniscrews has been suggested. There is no consensus in the current literature about which of these methods is the gold standard; thus, our objective was to carry out a systematic review and meta-analysis of the literature on surface treatments of miniscrews. The review protocol was registered (PROSPERO CRD42023408011) and is in accordance with the PRISMA guidelines. A bibliographic search was carried out on PubMed via MEDLINE, Cochrane Library, Embase and Web of Science. The initial search of the databases yielded 1684 results, with 98 studies included in the review, with one article originating from the search in the bibliographic references of the included studies. The results of this systematic review show that the protocols of miniscrew surface treatments, such as acid-etching; sandblasting, large-grit and acid-etching; photofunctionalization with ultraviolet light; and photobiomodulation, can increase stability and the success of orthodontic treatment. The meta-analysis revealed that the treatment with the highest removal torque is SLA, followed by acid-etching. On the other hand, techniques such as oxidative anodization, anodization with pre-calcification and heat treatment, as well as deposition of chemical compounds, require further investigation to confirm their effectiveness.

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Evaluation of miniscrew stability using an automatic embedding auxiliary skeletal anchorage device

Abstract: The auxiliary device improved the mechanical retention force without the need to increase miniscrew length or diameter. This may enable the safe use of miniscrews in difficult areas.

Cited by 3 publications

References 29 publications

A novel auxiliary device enhances miniscrew stability under immediate heavy loading simulating orthopedic treatment

A novel auxiliary device enhances miniscrew stability under immediate heavy loading simulating orthopedic treatment

Effects of root contact length on the failure rate of anchor screw

Surface Treatment of Dental Mini-Sized Implants and Screws: A Systematic Review with Meta-Analysis

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