Mandibular arch form: The relationship between dental and basal anatomy

Ronay, Valerie; Miner, R. Matthew; Will, Leslie A.; Arai, Kazuhito

doi:10.1016/j.ajodo.2006.10.040

Cited by 78 publications

(75 citation statements)

References 8 publications

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“…This finding is consistent with those reported by Ronay et al 16 and supports Andrews' WALA ridge theory, 13 which suggests that the dental arch form is related to the basal arch form in each patient. Changing the form of the dental arch during treatment without consideration of the basal arch form may result in relapse or give rise to periodontal problems.…”

Section: Discussionsupporting

confidence: 83%

“…Consistent with the findings of Ronay et al, 16 the distances between the corresponding WALA and FA points were negative in the anterior area and positive in the posterior area because the WALA points were lingual and buccal in relation to the FA, respectively. However, the distance was larger in the maxilla (3.97 mm for the central incisor) than in the mandible (1.31 mm) because the upper incisors have a more labial inclination than the lower (Fig 3).…”

Section: Discussionsupporting

confidence: 81%

“…Identifying the WALA ridge is easier than estimating the root apex. In a recent study, Ronay et al 16 measured the basal arch width using the WALA points to evaluate the relationship between the dental and basal arch forms in Class I samples, while Ball et al…”

Section: Discussionmentioning

confidence: 99%

“…They found that the anterior and posterior overjets were homogeneous. In recent times, several studies [14][15][16] have evaluated the relationship between the dental and basal arches on the basis of the WALA ridge (named after Will Andrews and Larry Andrews), which connects the most convex points on the mucogingival junction. 13 However, none of these studies analyzed the maxillary arch, and therefore, the horizontal relationship between the upper and lower dentition has not yet been assessed.…”

Section: Introductionmentioning

confidence: 99%

“…Previous reports have stressed the importance of the coordination between the upper and lower arches and claimed that the absence of this coordination may lead to functional and esthetic problems. [9][10][11][12] Few studies have been performed on the shape of the basal arch, [13][14][15][16] whereas several studies have examined the characteristics of the dental arch form in different ethnic groups. [17][18][19][20][21][22][23] Some previous studies were aimed at finding mathematical relations to describe the dental arch.…”

Section: Introductionmentioning

confidence: 99%

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Three-dimensional evaluation of the relationship between dental and basal arch forms in normal occlusion

et al. 2011

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Objective:The purposes of this study were to evaluate the relationship between the dental and basal arch forms; to analyze their differences in the tapered, ovoid, and square arch forms in normal occlusion by using three-dimensional (3D) virtual models; and to test the hypothesis that the overjet and maxillomandibular basal arch width difference have a significantly positive correlation. Methods: Seventy-seven normal occlusion plaster casts were examined by 3D scanning. Facial axis (FA) and WALA points were digitized using the Rapidform 2006 software. The dimensions of the dental and basal arches and the overjet were measured. The samples were classified into 3 groups according to arch forms: tapered (n = 20), ovoid (n = 20), and square (n = 37). Analysis of variance (ANOVA) was used to compare the dental and basal arch dimensions. The Pearson correlation coefficients between the intercanine as well as the intermolar widths at the FA and WALA points were calculated. Results: With regard to the basal arch dimensions, the tapered arch form showed a larger mandibular intermolar depth than the ovoid. Strong correlations were noted between the basal and dental intermolar widths in both the upper and lower arches (r = 0.83 and 0.85, respectively). Moderate correlation was found between the upper and lower intercanine widths (r = 0.65 and 0.48, respectively). Conclusions: The 3 dental arch form groups differed only in some dimensions of the skeletal arch. Moderate correlations were found between the basal and dental intercanine widths. These findings suggest that the basal arch may not be a principle factor in determining the dental arch form. (Korean J Orthod 2011;41(4):288-296)

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Section: Discussionsupporting

confidence: 83%

Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%