Assessment of Maxillary Transverse Deficiency and Treatment Outcomes by Cone Beam Computed Tomography

Nervina, Jeanne M.; Kapila, Sunil; Flores‐Mir, Carlos

doi:10.1002/9781118674888.ch17

Cited by 2 publications

(3 citation statements)

References 67 publications

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“…Posteroanterior cephalograms (PACs) were once considered the most available and reliable methods, however, the conventional two-dimensional (2D) images of skeletal structures have technical limitations that reduce the accuracy of landmark location [ 15 , 16 ]. Cone-beam computed tomography (CBCT) shows more invariability and reproducibility for transverse measurements [ 17 ], such examples include the University of Pennsylvania Cone-Beam CT Analysis [ 18 ], the Yonsei transverse index [ 19 ], and Case Western University’s (CWRU) transverse analysis [ 20 ] et al…”

Section: Introductionmentioning

confidence: 99%

A novel maxillary transverse deficiency diagnostic method based on ideal teeth position

Wang

Zhang

et al. 2023

BMC Oral Health

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Background This study proposed a novel maxillary transverse deficiency diagnostic method and evaluated the skeletal Class I and the mild skeletal Class III groups. Methods Pre-treatment data from 30 mild skeletal Class III and 30 skeletal Class I patients were collected and uploaded to the Emeiqi Case Management System to design the ideal teeth positions. On these positions, the first bi-molars width was measured at the central fossa and center resistance, the maxillary first bi-premolars width was measured at the central fossa, and the mandibular first bi-premolars width was measured at the distal contact point by Mimics, then width differences of two groups were calculated respectively. Results At ideal teeth positions, there was no statistically significant difference in the maxillomandibular width in the premolar area between the two groups, but there was in the molar area, and this difference was caused by the difference in mandible width between the two groups. Conclusions We proposed a new transverse diagnostic method and found that even the Class I group was not quite up to standard in the molar area on ideal teeth positions, and the Class III group had more severe maxillary transverse deficiency than the Class I group. Meanwhile, the maxillary transverse deficiency in the Class III group was mainly caused by the larger width of the mandible.

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Section: Introductionmentioning

confidence: 99%

A novel maxillary transverse deficiency diagnostic method based on ideal teeth position

Wang

Zhang

et al. 2023

BMC Oral Health

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“…Although RPEs are largely thought to deliver force vectors in two rather than three dimensions—a postulate that remains to be examined—they function within a complex three-dimensional (3D) craniofacial structure composed of a number of bones that are separated by sutures, that in turn reside within an environment that includes active muscles and soft tissues [ 4 ]. Furthermore, the RPE is attached to teeth that undergo dental movements due to the forces that also result in the modeling of bone.…”

Section: Introductionmentioning

confidence: 99%

“…Given these complexities, many variables must be taken into account in planning treatment with an RPE. These include, but are not limited to, sutural maturation, soft tissue and/or scar tissue resistance, the magnitude and types of movement of teeth to which the RPE is anchored, the location of the RPE in all three dimensions relative to the maxilla and teeth, and expected relapse after expansion [ 4 , 10 , 11 , 12 ]. All of these variables would determine the magnitude and direction of forces required to obtain predictable, efficient, and stable expansion of the maxilla.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Force Measurements During Rapid Palatal Expansion in Sus scrofa

et al. 2016

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Rapid palatal expansion is an orthodontic procedure widely used to correct the maxillary arch. However, its outcome is significantly influenced by factors that show a high degree of variability amongst patients. The traditional treatment methodology is based on an intuitive and heuristic treatment approach because the forces applied in the three dimensions are indeterminate. To enable optimal and individualized treatment, it is essential to measure the three-dimensional (3D) forces and displacements created by the expander. This paper proposes a method for performing these 3D measurements using a single embedded strain sensor, combining experimental measurements of strain in the palatal expander with 3D finite element analysis (FEA). The method is demonstrated using the maxillary jaw from a freshly euthanized pig (Sus scrofa) and a hyrax-design rapid palatal expander (RPE) appliance with integrated strain gage. The strain gage measurements are recorded using a computer interface, following which the expansion forces and extent of expansion are estimated by FEA. A total activation of 2.0 mm results in peak total force of about 100 N—almost entirely along the direction of expansion. The results also indicate that more than 85% of the input activation is immediately transferred to the palate and/or teeth. These studies demonstrate a method for assessing and individualizing expansion magnitudes and forces during orthopedic expansion of the maxilla. This provides the basis for further development of smart orthodontic appliances that provide real-time readouts of forces and movements, which will allow personalized, optimal treatment.

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Assessment of Maxillary Transverse Deficiency and Treatment Outcomes by Cone Beam Computed Tomography

Cited by 2 publications

References 67 publications

A novel maxillary transverse deficiency diagnostic method based on ideal teeth position

A novel maxillary transverse deficiency diagnostic method based on ideal teeth position

Three-Dimensional Force Measurements During Rapid Palatal Expansion in Sus scrofa

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