Controversies in tooth‐movement research

Krishnan, Vinod; Davidovitch, Zéev

doi:10.1002/9781118916148.ch18

Cited by 1 publication

(1 citation statement)

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“…In DRR samples, the sum of mesiodistal crown widths was larger and the PDL space in the D4 distal root surface was narrower. These findings corresponded with those of a study by Krishnan and Davidovitch, 26 which showed a narrowing of the PDL space and deformation of the alveolar bone on the side toward which the tooth is moved to as a result of the eruption pressure. Based on these findings, a crown width relatively larger than the mandibular bone width could generate an eruption pressure in the lateral direction.…”

Section: Discussionsupporting

confidence: 90%

The relationships between the arrangement of teeth, root resorption, and dental maturity in bovine mandibular incisors

Matsumoto

Ono

2017

Korean J Orthod

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ObjectiveThe objective of this study is to investigate the eruption pattern and root resorption of the bovine anterior dentition in relation to growth-related parameters based on dental maturity.MethodsA cross-sectional study was conducted on 110 bovine anterior mandibles by using standard radiography, cone-beam computed tomography (CBCT), and actual measurements. We determined the relationships between the stages of dental maturity by using a modification of Demirjian's method and various growth-related parameters, such as the activity of the root-resorbing tissue and mobility of the deciduous teeth. The correlation of growth-related parameters with interdental spacing and distal unusual root resorption (DRR) of the deciduous fourth incisor was assessed. The cause of mesial unusual root resorption (MRR) of the deciduous fourth incisor was determined on the basis of the arrangement of the permanent third incisor.ResultsAn independent t-test and chi-square test indicated significant differences in growth-related parameters associated with dental arch length discrepancy and factors related to the shedding of deciduous teeth between the low and high dental maturity groups. The samples with interdental spacing and DRR showed a larger sum of mesiodistal permanent crown widths and higher dental maturity than did the respective controls. Samples with MRR tended to show a lingually rotated distal tip of the adjacent tooth crown.ConclusionsDental maturity has relevance to the interdental spaces and unusual root resorption of mixed dentition. The position of the adjacent tooth crown on CBCT may be correlated with the occurrence of unusual root resorption of the incisor.

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Section: Discussionsupporting

confidence: 90%