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

Abstract

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.

Comparative Evaluation of Condylar Guidance Angles Measured Using Arcon and Non-Arcon Articulators and Panoramic Radiographs—A Systematic Review and Meta-Analysis

“…It results in a narrower triangular wedge-shaped space between the posterior part of the occlusal rims. This space is similar to the Christensen's space found in natural dentition and documented by protrusive interocclusal records [26,45,46].…”

Unveiling the Influence of the Curve of Spee on Bite Force and Chewing Ability: A Comparative Study

“…Shirai et al's study, employing gum-chewing exercises, mirrored these outcomes across various facial morphologies [42]. However, Castelo et al discovered In spite of the apparent signifcance of deep occlusal curvature in chewing ability, other research suggests that this curve must be positioned in a way that absorbs occlusal stresses during maxillomandibular function [45]. Te relative position of the condyle within the mandibular fossa was biomechanically linked to the CS.…”

“…In spite of the apparent significance of deep occlusal curvature in chewing ability, other research suggests that this curve must be positioned in a way that absorbs occlusal stresses during maxillomandibular function [ 45 ]. The relative position of the condyle within the mandibular fossa was biomechanically linked to the CS.…”

Correlation between Depth of the Curve of Spee and Some Specific Malocclusion Characteristics in a Population from Sibiu County, Romania—A Cross-Sectional Study

“…The curvature of the jaw helps with efficient mastication by conforming to the optimal shape of the arch, which is necessary for equally distributing the forces of biting and ensuring a stable function of the temporomandibular joint [40].…”

“…The investigation by Alkhalaf et al [40] also explored the aspect of sexual dimorphism regarding the COS. Their research indicated that the gender of the participants did not have a substantial effect on the depth of the COS, overjet, or overbite. The absence of sexual dimorphism suggests that differences in the depth of the curve are mostly influenced by individual anatomical and occlusal factors rather than gender-specific characteristics.…”