Quantitative cone-beam computed tomography evaluation of premaxilla and symphysis in Class I and Class III malocclusions (Article) [La tomodensitométrie volumique a faisceau conique pour l’évaluation du prémaxillaire et de la symphyse dans les malocclusions de Classe I et de Classe III]
Aims In order to compare the premaxilla and symphysis in Class I and Class III individuals, we measured the following parameters on CBCT scans: incisor inclination, symphyseal morphology, upper alveolar process morphology, symphyseal and maxillary leeway space, as well as anterior and posterior maxillary and mandibular bone thickness at various points below the cementoenamel junction. Materials and methods CBCT scans were taken of 62 individuals (41 females and 21 males) of ages ranging between 11 and 53 years (mean 23.26). The dentoskeletal relationship and alveolar process morphology (thickness) were evaluated on axial slices of the upper and lower jaws, and Student's parametric t-test for paired data was used to compare Class I and Class III values within different facial types. Results Many significant differences in measurements between the two facial types were noted in terms of tooth inclination, alveolar thickness, and leeway space. Conclusions Our findings confirm that Class III patients have little periodontal support at the upper and lower incisors, irrespective of the amount of symphyseal leeway space available, and any tooth movement must therefore be carefully planned and monitored.
Quantitative cone-beam computed tomography evaluation of premaxilla and symphysis in Class I and Class III malocclusions [La tomodensitométrie volumique a faisceau conique pour l’évaluation du prémaxillaire et de la symphyse dans les malocclusions de Classe I et de Classe III]
LOMBARDO, Luca;SPENA, Raffaele;SICILIANI, Giuseppe
2016
Abstract
Aims In order to compare the premaxilla and symphysis in Class I and Class III individuals, we measured the following parameters on CBCT scans: incisor inclination, symphyseal morphology, upper alveolar process morphology, symphyseal and maxillary leeway space, as well as anterior and posterior maxillary and mandibular bone thickness at various points below the cementoenamel junction. Materials and methods CBCT scans were taken of 62 individuals (41 females and 21 males) of ages ranging between 11 and 53 years (mean 23.26). The dentoskeletal relationship and alveolar process morphology (thickness) were evaluated on axial slices of the upper and lower jaws, and Student's parametric t-test for paired data was used to compare Class I and Class III values within different facial types. Results Many significant differences in measurements between the two facial types were noted in terms of tooth inclination, alveolar thickness, and leeway space. Conclusions Our findings confirm that Class III patients have little periodontal support at the upper and lower incisors, irrespective of the amount of symphyseal leeway space available, and any tooth movement must therefore be carefully planned and monitored.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
