Skeletal and dental asymmetries in Class II subdivision malocclusions using cone-beam computed tomography

Sanders, Derek A.; Rigali, Paul H.; Neace, William; Uribe, Flávio; Nanda, Ravindra

doi:10.1016/j.ajodo.2010.02.027

Cited by 69 publications

(71 citation statements)

References 29 publications

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“…Some authors have suggested that distal positioning of the mandibular molar is the main etiologic factor in the Class II subdivision with no evidence of skeletal asymmetry (Alavi et al 1988, Burstone 1998, Janson et al 2001, Azedevo et al 2006, Kurt et al 2008, whereas others, consistent with our study, have suggested skeletal aspects contribute to this malocclusion (Kula et al 1998, Janson et al 2007, Sanders 2010. Sanders et al (2010) investigated skeletal and dental asymmetry in Class II subdivision malocclusion using 3D modeling.…”

Section: Discussionsupporting

confidence: 78%

“…Sanders et al (2010) investigated skeletal and dental asymmetry in Class II subdivision malocclusion using 3D modeling. They found that the most common factor was a deficient mandible, followed by mesial positioning of the maxillary first molars (20%), then distal positioning of the mandibular first molar on the Class II side of the Class II subdivision malocclusions (19%).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Sınıf II subdivizyon maloklüzyonda mandibular asimetrinin değerlendirmesi

Akın¹,

İleri²,

Polat³

et al. 2015

Selcuk Dental Journal

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Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Sınıf II subdivizyon maloklüzyonda mandibular asimetrinin değerlendirmesi

Akın¹,

İleri²,

Polat³

et al. 2015

Selcuk Dental Journal

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show abstract

“…Fossa of the foramen (point F) was used as the reference point for the exact location of the mandibular foramen in 3D, 19 and because the primary intramembranous ossification begins in mental foramen, it has been used for the division of the mandibular corpus into body and chin units. Therefore, in the current study, the skeletal unit lengths were measured on the guide of point F and the mental foramen similar to the study of You et al 14 Liukkonen et al 11 investigated mandibular asymmetry using orthopantomograms taken from the same healthy children at ages 7 and 16 years and found a statistically significant difference between the right and left sides in condylar height at age 7 years, in ramus height at both ages, and in the condylar and ramus height at age 16 years.…”

Section: Discussionmentioning

confidence: 99%

Mandibular asymmetry in unilateral and bilateral posterior crossbite patients using cone-beam computed tomography

Veli¹,

Uysal²,

Özer³

et al. 2011

The Angle Orthodontist

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Objective: To test the hypotheses that (1) there is no difference in mandibular asymmetry between the crossbite and normal side in a unilateral crossbite group (UCG) and between the right and left sides in a bilateral crossbite group (BCG) and a control group (CG); and (2) there is no significant difference in mandibular asymmetry among crossbite groups and control group. Materials and Methods: The cone-beam computed tomography scans of three groups were studied: (1) 15 patients (6 male, 9 female; mean age: 13.51 6 2.03 years) with unilateral posterior crossbite; (2) 15 patients (8 male, 7 female; mean age: 13.36 6 2.12 years) with bilateral posterior crossbite; and (3) 15 patients (8 male, 7 female; mean age: 13.46 6 1.53 years) as a control group. Fourteen parameters (eight linear, three surface, and three volumetric) were measured. Side comparisons were analyzed with paired samples t-test, and for the intergroup comparison, analysis of variance (ANOVA) and Tukey tests were used at the P , .05 level. Results: According to side comparisons, no statistically significant difference was found in the UCG. There were statistically significant differences in hemimandibular (P 5 .008) and ramal (P 5 .004) volumes for the BCG and in ramal height (P 5 .024) and body length (P 5 .021) for the CG. Intergroup comparisons revealed significant differences in hemimandibular (P 5 .002) and body volume (P , .001) for the normal side of the UCG and left sides of the other groups, and in angular unit length (P 5 .025) and condylar width (P 5 .007) for the crossbite side of the UCG and the right sides of the other groups. Conclusions: Contrary to UCG, CG and BCG were found to have side-specific asymmetry. Skeletal components of the mandible have significant asymmetry among the crossbite groups and the CG. (Angle Orthod. 2011;81:966-974.)

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“…With this program, the 3-D image reconstructions were standardized by using the Frankfort horizontal plane (represented by a line on the image) as the x-axis, the transporionic plane as the y-axis, and the midsagittal plane as the z-axis. The reference plane was similar to that proposed by Baysal et al 11 and Sanders et al 12 Alveolar bone thickness and BABH were measured for each scan before ARME (T1) and after ARME (T2) by one investigator who was blinded to the patient time points. No previous orthodontic treatment or systemic disease.…”

Section: Methodsmentioning

confidence: 99%

Alveolar bone changes after asymmetric rapid maxillary expansion

Akın

Baka

İleri

et al. 2014

The Angle Orthodontist

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Objective: To quantitatively evaluate the effects of asymmetric rapid maxillary expansion (ARME) on cortical bone thickness and buccal alveolar bone height (BABH), and to determine the formation of dehiscence and fenestration in the alveolar bone surrounding the posterior teeth, using conebeam computed tomography (CBCT). Materials and Methods: The CBCT records of 23 patients with true unilateral posterior skeletal crossbite (10 boys, 14.06 6 1.08 years old, and 13 girls, 13.64 6 1.32 years old) who had undergone ARME were selected from our clinic archives. The bonded acrylic ARME appliance, including an occlusal stopper, was used on all patients. CBCT records had been taken before ARME (T1) and after the 3-month retention period (T2). Axial slices of the CBCT images at 3 vertical levels were used to evaluate the buccal and palatal aspects of the canines, first and second premolars, and first molars. Paired samples and independent sample t-tests were used for statistical comparison. Results:The results suggest that buccal cortical bone thickness of the affected side was significantly more affected by the expansion than was the unaffected side (P , .05). ARME significantly reduced the BABH of the canines (P , .01) and the first and second premolars (P , .05) on the affected side. ARME also increased the incidence of dehiscence and fenestration on the affected side. Conclusions: ARME may quantitatively decrease buccal cortical bone thickness and height on the affected side. (Angle Orthod. 2015;85:799-805.)

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Skeletal and dental asymmetries in Class II subdivision malocclusions using cone-beam computed tomography

Cited by 69 publications

References 29 publications

Sınıf II subdivizyon maloklüzyonda mandibular asimetrinin değerlendirmesi

Sınıf II subdivizyon maloklüzyonda mandibular asimetrinin değerlendirmesi

Mandibular asymmetry in unilateral and bilateral posterior crossbite patients using cone-beam computed tomography

Alveolar bone changes after asymmetric rapid maxillary expansion

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