Forces released during sliding mechanics with passive self-ligating brackets or nonconventional elastomeric ligatures

Franchi, Lorenzo; Baccetti, Tiziano; Camporesi, Matteo; Barbato, Ersilia

doi:10.1016/j.ajodo.2007.08.011

Cited by 56 publications

(53 citation statements)

References 9 publications

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“…A total of 24 papers (from the electronic search) met the initial selection criteria. 1,3,10,11,13,18,[20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] However, in our second (final) stage of selection, 6 papers were eliminated because of undetermined sample size, 23,25,34 very small sample size, 10,35 or not reporting any standard deviations (or confidence intervals) and P values. 21 The secondary (hand) search of the reference lists of the selected papers resulted in three additional papers.…”

Section: Search Processmentioning

confidence: 99%

Frictional Resistance in Self-Ligating Orthodontic Brackets and Conventionally Ligated Brackets

Ehsani

Mandich

El‐Bialy

et al. 2009

The Angle Orthodontist

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Objective:To compare the amount of expressed frictional resistance between orthodontic selfligating brackets and conventionally ligated brackets in vitro as reported in the literature. Methods: Several electronic databases (Medline, PubMed, Embase, Cochrane Library, and Web of Science) were searched without limits. In vitro studies that addressed friction of self-ligating brackets compared with conventionally ligated brackets were selected and reviewed. In addition, a search was performed by going through the reference lists of the selected articles to identify any paper that could have been missed by the electronic searches. Results: A total of 70 papers from the electronic database searches and 3 papers from the secondary search were initially obtained. After applying the selection criteria, only 19 papers were included in this review. A wide range of methods were applied. Conclusions: Compared with conventional brackets, self-ligating brackets produce lower friction when coupled with small round archwires in the absence of tipping and/or torque in an ideally aligned arch. Sufficient evidence was not found to claim that with large rectangular wires, in the presence of tipping and/or torque and in arches with considerable malocclusion, self-ligating brackets produce lower friction compared with conventional brackets. (Angle Orthod. 2009;79: 592-601.)

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Section: Search Processmentioning

confidence: 99%

Frictional Resistance in Self-Ligating Orthodontic Brackets and Conventionally Ligated Brackets

Ehsani

Mandich

El‐Bialy

et al. 2009

The Angle Orthodontist

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“…The underlying principle behind the threshold force is that it must be low enough to prevent occluding the blood vessels in the periodontal membrane to allow the cells and the necessary biochemical messengers to be transported to the site where bone resorption and apposition will occur and thus permit tooth movement. (6)(7)(8) A passive self-ligation mechanism has the lowest frictional resistance of any ligation system. Thus the forces generated by the archwire are transmitted directly to the teeth and supporting structures without absorption or transformation by the ligature system.…”

Section: Lowfriction Techniques (Low Forces)mentioning

confidence: 99%

“…(6,7) Combination between LLLT and low friction techniques during the orthodontic treatment of teeth erupted in oral mucosa (without keratinized gum) to evaluate the formation of new keratinized gingiva.…”

Section: Lowfriction Techniques (Low Forces)mentioning

confidence: 99%

Laser Biostimulation and Self Ligating Appliances in Orthodontics: Periodontal Remodeling

et al. 2012

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24 patients are selected and 30 teeth in vestibular mucosae, without keratinized gingiva. No active periodontal disease (no BOP and gingival recessions). No BOP and CAL loss at the start of the orthodontic treatment. Every patient was treated with self ligating appliances (Time2/Time3, American Orthodontics). In every orthodontic session (each 30 days as average) the patient was treated with Nd:Yag laser biostimulation, for 90 seconds, with 320 micron fiber section, on utilizing the Biostimulating machine paremeters . No termical effects were produced by lasers applications. At the moment of debonding, 30 teeth involved in the research were evaluated in terms of quality and quantity of attached gingiva. BOP and CAL loss were also investigated. Every tooth considerated, at the end of orthodontic treatment showed a attached gingiva around the crown: the average of keratinized gingiva at the end of the study was 2,7 mm and the mean increasing at each month was 0,45 mm .. The combination between self ligating appliances and laser's biostimulation could improve the differentiation of periodontal ligaments stem cells in fibroblasts, able to promote attached gingiva around the crown of the teeth erupted in oral vestibular mucosae.In orthodontic treatment, tooth movement is related to the response to applied orthodontic forces that cause remodeling of the periodontal tissues, especially alveolar bone. The typical 2-to 3-year treatment period is burdensome for patients, so it is very important to accelerate alveolar bone remodeling during treatment to abbreviate the time required.Recently, various biostimulatory effects oflow energy laser irradiation that involve wound healing and fibroblast proliferation, collagen synthesis, and nerve regeneration have been reported. (1-3) In particular, the acceleration of bone regeneration by laser treatment has been a focus of contemporary researches. Therefore, if laser irradiation can cause the acceleration of bone remodeling, it may also have great potential benefit in abbreviating the orthodontic treatment period. (1, 2) The present study was designed to examine the effects of low-energy laser irradiation on alveolar bone remodeling during orthodontic tooth movement and consequently formation of new keratinized gingiva. LLLTLow level laser therapy (LLLT) is also known as "soft laser therapy" and bio-stimulation. The use ofLLLT in health care has been documented in the literature for more than 30 years and many research studies have demonstrated that LLLT is effective for some specific applications in dentistry. Recently, various effects of low-energy laser irradiation have been reported, including wound healing, fibroblast proliferation, collagen synthesis and nerve regeneration. In particular, the acceleration of bone regeneration by laser treatment has been the focus of recent studies.In orthodontics, low-energy laser irradiation can be utilized for several different treatments, such as the reduction of post-adj ustment pain, or treatment oftraumatic ulcers in the oral mucosa i...

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“…Self-ligating brackets, Slide unconventional elastomeric ligatures (Leone) and 8-shaped ligatures (Tecnident) as well as the special Synergy (Rocky Mountain) and Delta Force (Ortho Organizers) brackets are effective and equivalent options for the control of friction in the phase of dental leveling and alignment. 1,3,4,5 Archwire deflection-induced friction usually takes place in the initial phase of orthodontic treatment when the orthodontic slots are in different planes. Archwire deflection creates the forces responsible for correcting malpositioned teeth and simultaneously exerts pressure on anchorage teeth, generating deflection-induced friction, which undermines tooth movement effectiveness.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of frictional forces generated by NiTi archwire deformation in different orthodontic brackets: In vitro evaluation

Queiroz¹,

Ballester²,

Paiva³

et al. 2012

Dental Press J. Orthod.

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Introduction:The purpose of this study was to compare the frictional forces between 0.014-in NiTi wires (Aditek) with 4 mm horizontal deflection and brackets with different archwire ligation systems. Methods:Four types of self-ligating brackets (Damon MX, Easy Clip, Smart Clip and In-Ovation), a triple bracket (Synergy) and a twin bracket with 8-shaped ligature (Tecnident) were tested. Twin brackets with conventional elastomeric ligatures (Morelli) were used as control group. Tests were repeated 10 times for each bracket/archwire combination. Frictional forces were measured in an Instron universal tensile machine at 3 mm/minute speed and a total displacement of 6 mm. Statistical analysis comprised ANOVA and Dunnett's multiple comparison post hoc test.Results: Deflection-induced frictional (DIF) forces increased in the following order: Synergy, Damon, 8-shaped Ligature, Easy Clip, In-Ovation, Smart-Clip and conventional ligatures. The differences among groups were significant, with the exception of the 8-shaped ligature groups which was equal to the Damon and Easy Clip groups. Conclusions:Compared to conventional ligatures, all ligation systems tested reduced frictional forces. However, such reduction varied according to the ligation system employed.

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Forces released during sliding mechanics with passive self-ligating brackets or nonconventional elastomeric ligatures

Cited by 56 publications

References 9 publications

Frictional Resistance in Self-Ligating Orthodontic Brackets and Conventionally Ligated Brackets

Frictional Resistance in Self-Ligating Orthodontic Brackets and Conventionally Ligated Brackets

Laser Biostimulation and Self Ligating Appliances in Orthodontics: Periodontal Remodeling

Comparative study of frictional forces generated by NiTi archwire deformation in different orthodontic brackets: In vitro evaluation

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