Determining shapes and dimensions of dental arches for the use of straight-wire arches in lingual technique

Kairalla, Silvana Allegrini; Scuzzo, Giuseppe; Triviño, Tarcila; Velasco, Leandro; Lombardo, Luca; Paranhos, Luiz Renato

doi:10.1590/2176-9451.19.5.116-122.oar

Cited by 11 publications

(34 citation statements)

References 16 publications

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“…In another similar study, Park et al 6 used three-dimensional virtual models for digitizing the reference points and described four clusters in the Korean population, namely wide, narrow, tapering and ovoid types. Kairalla et al 5 used linear measurement instead of polynomial equations to describe arch forms in Caucasian Brazilians. They concluded that the lingual arch form was parabolic in For personal use only.…”

Section: Discussionmentioning

confidence: 99%

“…3 However, very few studies have been done about arch form from the lingual/palatal perspective. [4][5][6] The number of patients undergoing lingual appliance therapy has grown markedly in the past few years. [7][8][9] Customization of arch wires to match the patient's arch form is an important step in labial as well as lingual orthodontics.…”

Section: Introductionmentioning

confidence: 99%

“…12 Hence, it will be logical to assume that similar variations exist for the lingual arch form. The lingual arch form in the Caucasian 4,5 and Korean population 6 has been analyzed; however, no such studies have been conducted for Nepalese population samples.…”

Section: Introductionmentioning

confidence: 99%

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<p>Analysis of Lingual Arch Form in Dental Students of Nepal with Normal Occlusion</p>

Kafle

Devagiri

Chaudhari

et al. 2020

CCIDE

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Background: The objectives of this study were to describe and classify lingual arch form in dental students with normal occlusion and explore the possibility to provide a lingual arch form template for Nepalese population. Methods: The occlusion and arch form of 220 undergraduate dental students were analyzed and thirty-three subjects (14 males, 19 females) fulfilling the inclusion criteria were selected for the study. Reference points were drawn on the lingual surfaces of the teeth of study model using an indelible marker. A transparent ruled grid was used to obtain x and y coordinate values of the reference point. Following distances were measured with a digital caliper: intercanine width, inter-molar width, inter-second molar width, canine depth, first molar depth, and second molar depth. Two-step cluster analysis was used to further classify the arch. The mean reference point values of each cluster were entered into the software (CurveExpert 1.4, Hymas developers). The curve finder tool of the software was used to obtain the curve which best described the arch forms. Results: Two-step cluster analysis identified two distinguished clusters of lingual arch forms. Tenth degree polynomial was chosen as the best possible fit for lingual arch forms by using Curvefinder tool of the software CurveExpert 1.4. Conclusion: Two types of anatomical lingual arch forms derived from Nepalese dental students with normal occlusion have been described and templates for the same have been generated.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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<p>Analysis of Lingual Arch Form in Dental Students of Nepal with Normal Occlusion</p>

Kafle

Devagiri

Chaudhari

et al. 2020

CCIDE

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“…In order to evaluate the dental arch form and size, previous studies have used polynomial functions 10 13 25 or linear measurements. 26 27 The current study applied polynomial functions as these follow the curvature of the arch and seem more similar to those used in the straight-wire technique. 13 …”

Section: Discussionmentioning

confidence: 99%

The effect of occlusogingival placement of clinical bracket points on the adaptation of a straight wire to the lingual arch form

et al. 2018

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ObjectiveThe aim of this study is to compare the adaptation of a straight wire between brackets positioned at the mid-lingual surface and those placed gingivally by using a three-dimensional simulation software.MethodsThis cross-sectional study was performed using OrthoAid, an in-house software. The subjects were 36 adolescents with normal Class I occlusion. For each dental cast, two bracket positioning approaches, namely the middle and gingival, were examined. In the middle group, the reference points were placed on the mid-lingual surface of each tooth, while in the gingival group, the reference points were positioned lingually on the anterior teeth. A 4th degree polynomial was adopted, and the in-plane and off-plane root mean squares (RMSs) of the distances between the reference points and the fitted polynomial curve were calculated using the software. Statistical analysis was performed using the paired-samples t-test (α = 0.05).ResultsThe mean in-plane RMS of the polynomial curve to the bracket distance in the gingival group was significantly lower than that in the middle group (p < 0.001). The off-plane RMS was higher in the gingivally positioned brackets in the maxilla than in the middle group (p < 0.001). However, the off-plane RMS in mandible was not statistically significantly different between the two groups (p = 0.274).ConclusionsThe results demonstrated that the gingival placement of lingual brackets on the anterior teeth could decrease the distance between a tooth and the straight wire.

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“…Park et al in 2015 also provided a new classification of maxillary and mandibular lingual arch forms: Narrow, tapering and ovoid according to intercanine and intermolar widths and their best-fit curves on lingual surface of dentition. [4,5]…”

Section: Appliance Designmentioning

confidence: 99%

The current evidence and implications of lingual orthodontics

Saini¹,

Sharma²,

Kalha³

et al. 2016

J Indian Orthod Soc

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The growing interest in lingual orthodontics is perhaps a reflection of the social and esthetic issues of orthodontics being addressed as more adults seek treatment. The issue remains confounded by the clinical manipulation of the appliance, the patient comfort, and the predictability of outcomes. For any technique or system to succeed, it must address the above three issues directly.The evidence available on lingual orthodontics traces a very clear and predictable pattern. The 80's were devoted to the limitation and progression of the concept, the 90's to the comparison between labial and lingual, and the evolution of laboratory technique and bracket system. The last decade focuses on innovations, predictability of outcomes, the impact of white spot lesion (WSL), and the patient acceptability.The purpose of this review is to investigate the current evidence and implications of lingual orthodontics. The electronic database search was done on PubMed, Cochrane Library, Embase, EBSCOhost, Web of Knowledge, and Google Scholar reporting on appliance design, bonding, and laboratory setup, biomechanics, survey studies, case reports, and treatment outcomes. An InsIght Into hIstoRy of LInguAL oRthodontIcsLingual orthodontics started in 1970's when Fujita in Japan and Kurtz in the USA used lingual brackets for the first time. It made a sensational debut as lingual brackets were invisible, and the number of initiated cases increased exponentially. A few years later, the number of lingual orthodontic cases decreased greatly. The reason was very clear; most doctors could not achieve satisfactory results with lingual orthodontics. Following this, initial development and expansion of lingual orthodontics in the 1990s, interest, particularly in the United States, decreased, probably due to the poor results of completed cases. [1] As time passed and problem-solving associated with lingual orthodontics was improved, lingual orthodontics expanded

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Determining shapes and dimensions of dental arches for the use of straight-wire arches in lingual technique

Cited by 11 publications

References 16 publications

<p>Analysis of Lingual Arch Form in Dental Students of Nepal with Normal Occlusion</p>

<p>Analysis of Lingual Arch Form in Dental Students of Nepal with Normal Occlusion</p>

The effect of occlusogingival placement of clinical bracket points on the adaptation of a straight wire to the lingual arch form

The current evidence and implications of lingual orthodontics

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