Significance of curve of Spee: An orthodontic review

Kumar, KP Senthil; Tamizharasi, S

doi:10.4103/0975-7406.100287

Cited by 25 publications

(19 citation statements)

References 33 publications

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“…Recent research has revealed that it had a curvature that extends from the centre teeth’s incisor edges to their distobuccal cusps [ 3 ]. The literature claims that the mesial inclination of the lower molar teeth’s long axis caused the masticatory muscles to function improperly, which led to the development of the COS [ 4 , 5 , 6 ]. One study suggested that the Curve of Spee may play a biomechanical role in the processing of food by enhancing the crush/shear ratio between the posterior teeth and the efficiency of occlusal pressures during the masticatory process [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…The literature claims that the mesial inclination of the lower molar teeth’s long axis caused the masticatory muscles to function improperly, which led to the development of the COS [ 4 , 5 , 6 ]. One study suggested that the Curve of Spee may play a biomechanical role in the processing of food by enhancing the crush/shear ratio between the posterior teeth and the efficiency of occlusal pressures during the masticatory process [ 4 ]. This suggestion alluded to the idea of “masticatory efficiency.” The COS permits unrestricted lower jaw motions while enhancing food chewing by maintaining upper and lower tooth contacts throughout operation [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Accentuation of Curve of Spee on Masticatory Efficiency—A Systematic Review and Meta-Analysis

et al. 2023

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Background: The appropriate alignment of the lower teeth is indicated by the Curve of Spee (COS), which can be observed in the sagittal profile view of human skulls. Graf Von Spee made the initial observation on this occlusal curvature. Through this systematic review and meta-analysis, we evaluated studies that looked at how COS affected masticatory activities. Methods: The databases PubMed-MEDLINE, Web of Science, Cochrane, and Scopus were all searched. A total of 12 documents were ultimately picked because they met the necessary inclusion and exclusion requirements. The data was then loaded into the RevMan 5 programme for meta-analysis after being chosen for information on the sample size, variables analyzed, and various aspects of the research. Results: The Curve of Spee was found to have a noticeable impact on both the masticatory efficiency as well as dentofacial alignment in the 12 studies that we selected for the review and meta-analysis. In addition, other occlusal curvatures such as the Curve of Monson and the Curve of Wilson were found to be of vital importance on a similar level to the COS. The meta-analysis further revealed that seven of the included clinical trials had mentioned the noticeable impact on masticatory efficiency. Conclusions: This study focused on the significance of the COS on force distribution in the oral cavity as well as the necessity of COS corrections after receiving full orthodontic care. Following orthodontic treatment, the COS, along with other occlusal curves such as the Curve of Wilson and the Curve of Monson, is essential in removing strains from the condyle, as well as the maxilla and mandible, which enhances masticatory effectiveness and lessens the overall strain on a patient’s oral cavity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of Accentuation of Curve of Spee on Masticatory Efficiency—A Systematic Review and Meta-Analysis

et al. 2023

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“…This tilt of the curve of Spee increases the crush/shear ratio of the force produced on food between the posterior molars (24). In addition, the concave border of anterior ramus favors the development of compression and tension loads during mastication.…”

Section: Discussionmentioning

confidence: 99%

Analysis of potential dynamic concealed factors in the difficulty of lower third molar extraction

Singh

Ajmera²,

Shuisheng³

et al. 2016

Med Oral

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BackgroundThe purpose of this study was to identify potential concealed variables associated with the difficulty of lower third molar (M3) extractions.Material and MethodsTo address the research purpose, we implemented a prospective study and enrolled a sample of subjects presenting for M3 removal. Predictor variables were categorized into Group-I and Group-II, based on predetermined criteria. The primary outcome variable was the difficulty of extraction, measured as extraction time. Appropriate univariate and multivariate statistics were computed using ordinal logistic regression.ResultsThe sample comprised of 1235 subjects with a mean age of 29.49 +/- 8.92 years in Group-I and 26.20 +/- 11.55 years in Group-II subjects. The mean operating time per M3 extraction was 21.24 +/- 12.80 and 20.24 +/- 12.50 minutes for Group-I and Group-II subjects respectively. Three linear parameters including B-M2 height (distance between imaginary point B on the inferior border of mandibular body, and M2), lingual cortical thickness, bone density and one angular parameter including Rc-Cs angle (angle between ramus curvature and curve of spee), in addition to patient’s age, profile type, facial type, cant of occlusal plane, and decreased overbite, were found to be statistically associated (P < or = 0.05) with extraction difficulty under regression models.ConclusionsIn conclusion, our study indicates that the difficulty of lower M3 extractions is possibly governed by morphological and biomechanical factors with substantial influence of myofunctional factors. Practical Implications: Preoperative evaluation of dynamic concealed factors may not only help in envisaging the difficulty and planning of surgical approach but might also help in better time management in clinical practice. Key words:Third molar, impacted, extraction, mandibular, facial type.

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“…Some of the side effects of using these unchecked materials would be proclination of the anterior teeth, lingual or distal tipping of the molars etc. [ 28 ]. In case of aligners, the curve of Spee is flattened by extrusion of premolars and molars using extrusive attachments or by intruding the anteriors using intrusive attachments [ 13 ].…”

Section: Why Clear Aligners?mentioning

confidence: 99%

Essential Attributes of Clear Aligner Therapy in terms of Appliance Configuration, Hygiene, and Pain Levels during the Pandemic: A Brief Review

Marya

Venugopal

Vaid

et al. 2020

Pain Research and Management

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Fixed orthodontic treatment has been compromised at many levels during the pandemic period, as clinics underwent a prolonged lockdown and patients could not be treated regularly. With the end of the pandemic nowhere in sight, may be it is time to put newer tools, such as clear aligner therapy, for better use. Fixed orthodontic appliances by nature are not always self-limiting, which, if left unmonitored over a long period may cause undesirable side effects, pain, and discomfort. The undesired tooth movements that may occur with arch wire-guided mechanics in addition to problems with cut wires or removed brackets may be minimized with the use of aligners. While the benefits of using aligners are for all to see, they do require extensive planning and careful evaluation of the progress. This article reviews the advantages of using aligners during the pandemic period and how it can be beneficial in helping orthodontists resume their practice.

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Significance of curve of Spee: An orthodontic review

Cited by 25 publications

References 33 publications

The Effect of Accentuation of Curve of Spee on Masticatory Efficiency—A Systematic Review and Meta-Analysis

The Effect of Accentuation of Curve of Spee on Masticatory Efficiency—A Systematic Review and Meta-Analysis

Analysis of potential dynamic concealed factors in the difficulty of lower third molar extraction

Essential Attributes of Clear Aligner Therapy in terms of Appliance Configuration, Hygiene, and Pain Levels during the Pandemic: A Brief Review

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