The evolution of cephalometric diagnosis in Orthodontics

Silva, Maurício Barbosa Guerra da; Sant’Anna, Eduardo Franzotti

doi:10.1590/s2176-94512013000300011

Cited by 17 publications

(13 citation statements)

References 27 publications

(25 reference statements)

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“…The application of 3D planning enables the surgeon to virtually simulate the surgery before entering the operating room [ 5 ]. Because the benefits of 3D simulation and its distribution of use are still discordant, a reevaluation of the possibilities and limitations of both 2D and 3D methods is needed [ 6 ]. Numerous studies have demonstrated the feasibility and accuracy of 3D simulation [ 4 , 7 – 17 ], and the increasing use in OGS planning has lead to significant outcome improvement [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Computer-Assisted Orthognathic Surgery for Patients with Cleft Lip/Palate: From Traditional Planning to Three-Dimensional Surgical Simulation

et al. 2016

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BackgroundAlthough conventional two-dimensional (2D) methods for orthognathic surgery planning are still popular, the use of three-dimensional (3D) simulation is steadily increasing. In facial asymmetry cases such as in cleft lip/palate patients, the additional information can dramatically improve planning accuracy and outcome. The purpose of this study is to investigate which parameters are changed most frequently in transferring a traditional 2D plan to 3D simulation, and what planning parameters can be better adjusted by this method.Patients and MethodsThis prospective study enrolled 30 consecutive patients with cleft lip and/or cleft palate (mean age 18.6±2.9 years, range 15 to 32 years). All patients received two-jaw single-splint orthognathic surgery. 2D orthodontic surgery plans were transferred into a 3D setting. Severe bony collisions in the ramus area after 2D plan transfer were noted. The position of the maxillo-mandibular complex was evaluated and eventually adjusted. Position changes of roll, midline, pitch, yaw, genioplasty and their frequency within the patient group were recorded as an alternation of the initial 2D plan. Patients were divided in groups of no change from the original 2D plan and changes in one, two, three and four of the aforementioned parameters as well as subgroups of unilateral, bilateral cleft lip/palate and isolated cleft palate cases. Postoperative OQLQ scores were obtained for 20 patients who finished orthodontic treatment.Results83.3% of 2D plans were modified, mostly concerning yaw (63.3%) and midline (36.7%) adjustments. Yaw adjustments had the highest mean values in total and in all subgroups. Severe bony collisions as a result of 2D planning were seen in 46.7% of patients. Possible asymmetry was regularly foreseen and corrected in the 3D simulation.ConclusionBased on our findings, 3D simulation renders important information for accurate planning in complex cleft lip/palate cases involving facial asymmetry that is regularly missed in conventional 2D planning.

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Section: Introductionmentioning

confidence: 99%

Computer-Assisted Orthognathic Surgery for Patients with Cleft Lip/Palate: From Traditional Planning to Three-Dimensional Surgical Simulation

et al. 2016

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“…The development and introduction into practice of new instrumental methods of patient examination (namely, teleroentgenography), combined with the development of anthropology (namely, craniology), allowed in the combination to create a unique in its kind -a cephalometric analysis, which is a reliable tool in the work of modern orthodontics [33]. Moreover, the results of this study have found application in other areas of medicine, in particular in forensic medicine [30].…”

Section: Introductionmentioning

confidence: 82%

Regression models of individual cephalometric indicators used in the method of R. M. Ricketts

Черныш

2018

Biomed. and Biosoc. Anthrop.

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It is proved that in the analysis of lateral teleroentgenograms according to different methods distances and angles have their normative indices which differ for persons of different ethnic, gender and age belongings. Therefore, for a full use in the orthodontics R.M. Ricketts method, similar studies are needed in Ukraine. The purpose of the work -in boys and girls with normal occlusion close to the orthognathic bite and harmonious face construct and analyze the regression models of teleroentgenographic indicators used in the method of R. M. Ricketts. Primary lateral teleroentgenograms of 38 young men (aged 17-21 years) and 55 young women (aged from 16 to 20 years) with normal occlusion close to orthognathic bite and harmonic face, obtained from the Veraviewepocs 3D device, Morita (Japan), taken from the bank data of research center of National Pirogov Memorial Medical University, Vinnytsya. Cephalometric measurements were performed according to the recommendations of R. M. Ricketts. All indicators were divided into three groups: 1 -metric characteristics of the skull, which usually do not change during surgical and orthodontic treatment; 2 -tooth-jaw indicators, the definition of which most often guided by performing orthodontic manipulations of patients in children and adolescents, as well as those with already formed bone skeleton when orthodontic surgery can change the width, length, angles and position of the bones of the upper and lower jaws; 3 -indicators that characterize the position of each individual tooth relative to each other, to the bony cranial structures and face profile. The regression models of individual teleroentgenographic indicators used in the R.M. Ricketts methodology are constructed using the "Statistica 6.0" licensing package. Constructed all 2 reliable models of the indicators included in the second group (distance Go-CF and Xi-Pm), depending on the indicators of the first group (in young men R 2 = 0.884 and 0.928, and in young women -0.735 and 0.719); as well as in young men, 7 out of 8 possible reliable models (R 2 = 0.568 to 0.887) of the indicators included in the third group (the magnitude of the distances 6u-6l, Overjet, Overbite, 6u-PTV, 1l-APog, 1u-APog and Xi-OcP ) depending on the indicators of the first and second groups; and only 5 models for young women (6u-PTV, 1l-APog, 1u-APog and Xi-OcP distances, and the magnitude of the Max1-APog angle). In the analysis of entering into the regression models of the relevant predictors, it was found that in young men, among the teleroentgenographic indicators of the first group included in the two models of the second group, is the distance P-PTV, and in young women the front length of the base of the skull N-CC and the back of the skull base Ar-Pt It was also found that among young men among the teleroentgenographic indicators of the first and second groups, which were included in the models of the third group, the most frequent is the value of the distance B-Pog (11.1%); while in young women -distance B-Pog (15.6%) and an angle DC-X...

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“…Cone Beam CT (CBCT) uses a round or rectangular cone shaped X-ray beam centered on a two-dimensional X-ray sensor to scan a 360° rotation about the patient's head. 17 Cone Beam Computed Tomography is less expensive than CT, and comparatively free of the labor-intensive costly service. The radiation dose delivered to the patient is only 3 to 20 percent of that of a conventional CT scan.…”

Section: ] Skeletal Imaging:-a) Computed Tomography (Ct):-mentioning

confidence: 99%

Untitled

2019

MIJRAD

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Background: Orthodontist job is to fit together the pieces of the craniofacial complex puzzle. Orthodontic treatment affects the craniofacial relationship in 3 planes of space. Yet strangely enough, the critical diagnostic records currently used are 2dimensional. In 3D imaging a set of anatomical data is collected using diagnostic imaging equipment, processed by computer and then displayed on a 2D monitor to give the illusion of depth. The goal of 3D imaging is to create a life like digital record of Human dentofacial morphology.

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The evolution of cephalometric diagnosis in Orthodontics

Abstract: The authors of this study aim to inform the orthodontic society of fundamentals about digital cephalometric radiographic image and computed tomography, discussing about: Field of view (FOV), radiation doses, demands for the use in Orthodontics and radiographic simulations.

Cited by 17 publications

References 27 publications

Computer-Assisted Orthognathic Surgery for Patients with Cleft Lip/Palate: From Traditional Planning to Three-Dimensional Surgical Simulation

Computer-Assisted Orthognathic Surgery for Patients with Cleft Lip/Palate: From Traditional Planning to Three-Dimensional Surgical Simulation

Regression models of individual cephalometric indicators used in the method of R. M. Ricketts

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