3-Dimensional cone-beam computed tomography analysis of transverse changes with Schwarz appliances on both jaws

Tai, Kiyoshi; Park, Jae Hyun; Mishima, Katsuaki; Shin, Je-Won

doi:10.2319/110910-655.1

Cited by 36 publications

(40 citation statements)

References 18 publications

(17 reference statements)

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“…69,71 Despite these limitations, CBCT has been used to discern the potential effects of treatment-or patient-specific variables on the integrity and morphology of bone around tooth roots in full-fixed appliance therapy and with both rapid and slow expansion. [72][73][74][75][76][77][78][79][80] Routine orthodontic therapy using full-fixed appliances is accompanied by significant changes in bone width even with small amounts of buccal movement of posterior teeth. 75,80 This finding raises the question of whether biologically compatible expansion is possible using specific combinations of fixed appliances and wires as claimed by some manufacturers.…”

Section: Utilization Of Cbct For Orthodontic Treatment Outcomes Diagmentioning

confidence: 99%

CBCT in orthodontics: assessment of treatment outcomes and indications for its use

Kapila

Nervina

2015

Dentomaxillofacial Radiology

305

222

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Since its introduction into dentistry in 1998, CBCT has become increasingly utilized for orthodontic diagnosis, treatment planning and research. The utilization of CBCT for these purposes has been facilitated by the relative advantages of three-dimensional (3D) over two-dimensional radiography. Despite many suggested indications of CBCT, scientific evidence that its utilization improves diagnosis and treatment plans or outcomes has only recently begun to emerge for some of these applications. This article provides a comprehensive and current review of key studies on the applications of CBCT in orthodontic therapy and for research to decipher treatment outcomes and 3D craniofacial anatomy. The current diagnostic and treatment planning indications for CBCT include impacted teeth, cleft lip and palate and skeletal discrepancies requiring surgical intervention. The use of CBCT in these and other situations such as root resorption, supernumerary teeth, temporomandibular joint (TMJ) pathology, asymmetries and alveolar boundary conditions should be justified on the basis of the merits relative to risks of imaging. CBCT has also been used to assess 3D craniofacial anatomy in health and disease and of treatment outcomes including that of root morphology and angulation; alveolar boundary conditions; maxillary transverse dimensions and maxillary expansion; airway morphology, vertical malocclusion and obstructive sleep apnoea; TMJ morphology and pathology contributing to malocclusion; and temporary anchorage devices. Finally, this article utilizes findings of these studies and current voids in knowledge to provide ideas for future research that could be beneficial for further optimizing the use of CBCT in research and the clinical practice of orthodontics.

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Section: Utilization Of Cbct For Orthodontic Treatment Outcomes Diagmentioning

confidence: 99%

CBCT in orthodontics: assessment of treatment outcomes and indications for its use

Kapila

Nervina

2015

Dentomaxillofacial Radiology

305

222

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“…): 2.9 mm (SD 1.68) [3], 3 mm [8], 3.01 mm (SD 1.82) [5], 3.5 (SD 1.54) [14], 3.9 mm (SD 2.1) [4], and 4.62 (SD 1.16) [19]. The recently published high value of 6.18 mm (SD 1.82) [18] was obtained by measuring three-dimensional (3D) X-ray images and differs greatly from all other published data.…”

Section: Resultsmentioning

confidence: 99%

“…The patient must wear the appliance for several hours during the day and throughout the night [1, 3,6,8,9,10,11,13]. Shorter wearing periods, i.e., overnight only, are the exception [16,17,18]. Depending on the type of expansion screw, the gap may be opened between 0.2 and 0.4 mm by a 90° activation turn [6,9,15].…”

Section: Introductionmentioning

confidence: 99%

“…Das Weiterdrehen soll in der Regel 1-bis 2-mal/Woche [3,6,9,13] durchgeführt werden, seltener dagegen einmal zweiwöchent-lich [15], wobei der Patient seine Apparatur einige Stunden tagsüber und die ganze Nacht tragen sollte [1, 3,6,8,9,10,11,13]. Kürzere verordnete Tragezeiten, beispielsweise nur über Nacht, sind dagegen eher die Ausnahme [16,17,18]. Bei einer 90°-Drehung werden, je nach eingebauter Dehnschraube, Spaltverbreiterungen zwischen 0,2 und 0,4 mm in der Literatur angegeben [6,9,15].…”

Section: Introductionunclassified

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Comparison of estimated and actual changes in gap widths of expansion screws in plate appliances with 7- and 14-day activation

et al. 2011

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“…14,16,26 Other studies have gone beyond using two dimensionally based landmarks for CBCT analysis to determine transverse norms 27 or outcomes of specific treatment. 28 Both studies relied on dentoalveolar width measurements in THREE DIMENSIONALLY BASED CEPHALOMETRIC ANALYSIS the coronal plane at specific distances apical to the cementoenamel junction. The measurements, however, are based on individually defined point landmarks, which makes it difficult to compare data between the two studies.…”

Section: Discussionmentioning

confidence: 99%

Newly defined landmarks for a three-dimensionally based cephalometric analysis:A retrospective cone-beam computed tomography scan review

Lee

Kanavakis

Miner

2015

The Angle Orthodontist

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Objectives: To identify two novel three-dimensional (3D) cephalometric landmarks and create a novel three-dimensionally based anteroposterior skeletal measurement that can be compared with traditional two-dimensional (2D) cephalometric measurements in patients with Class I and Class II skeletal patterns. Materials and Methods: Full head cone-beam computed tomography (CBCT) scans of 100 patients with all first molars in occlusion were obtained from a private practice. InvivoDental 3D (version 5.1.6, Anatomage, San Jose, Calif) was used to analyze the CBCT scans in the sagittal and axial planes to create new landmarks and a linear 3D analysis (M measurement) based on maxillary and mandibular centroids. Independent samples t-test was used to compare the mean M measurement to traditional 2D cephalometric measurements, ANB and APDI. Interexaminer and intraexaminer reliability were evaluated using 2D and 3D scatterplots. Results: The M measurement, ANB, and APDI could statistically differentiate between patients with Class I and Class II skeletal patterns (P , .001). The M measurement exhibited a correlation coefficient (r) of 20.79 and 0.88 with APDI and ANB, respectively. Conclusions: The overall centroid landmarks and the M measurement combine 2D and 3D methods of imaging; the measurement itself can distinguish between patients with Class I and Class II skeletal patterns and can serve as a potential substitute for ANB and APDI. The new threedimensionally based landmarks and measurements are reliable, and there is great potential for future use of 3D analyses for diagnosis and research. (Angle Orthod. 2015;85:3-10.)

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3-Dimensional cone-beam computed tomography analysis of transverse changes with Schwarz appliances on both jaws

Cited by 36 publications

References 18 publications

CBCT in orthodontics: assessment of treatment outcomes and indications for its use

CBCT in orthodontics: assessment of treatment outcomes and indications for its use

Comparison of estimated and actual changes in gap widths of expansion screws in plate appliances with 7- and 14-day activation

Newly defined landmarks for a three-dimensionally based cephalometric analysis:A retrospective cone-beam computed tomography scan review

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