Evaluation of dental morphometrics during the orthodontic treatment

Kašparová, Martina; Procházka, Aleš; Grajciarová, Lucie; Yadollahi, Mohammadreza; Vyšata, Oldřich

doi:10.1186/1475-925x-13-68

Cited by 10 publications

(10 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…To relate the outcomes to the initial situations prior to orthodontic treatment, manual measurements were performed on the T1 and T0 casts , including intercanine distance [1,7,8,11] and overjet [7,25]. The treatment-related changes of these parameters were obtained by calculating the difference between T0 and T1.…”

Section: Determination Of Treatment-related Risk Factorsmentioning

confidence: 99%

Post-treatment changes in permanent retention

Wolf

Schulte

Küpper³

et al. 2016

J Orofac Orthop

View full text Add to dashboard Cite

OBJECTIVES While permanent retention is today the method of choice to stabilize orthodontic treatment outcomes, recent studies have increasingly reported posttreatment changes in tooth position during permanent retention. We conducted this study to analyze changes in the anterior mandible, whether the changes follow an underlying movement pattern, and, aiming for a preventive strategy, whether any risk factors could be identified comparing findings with the pretreatment situations. METH-ODS We included 30 patients who had worn fixed Twistflex retainers (UK 3-3) extending from canine to canine in the mandible. Casts reflecting the intraoral situations before orthodontic treatment (T0), directly after completion of active therapy (T1), and 6 months later (T2) were scanned and superimposed using Imageware Surfacer software. Posttreatment changes (T2-T1) of tooth position within the retainer block were analyzed on 3D virtual models and were compared to pretreatment (T0) and treatment-related (T1-T0) findings to identify potential risk factors. RESULTS Almost all analyzed patients revealed three-dimensional changes in tooth position within the retainer block. Comparing these movements, we repeatedly found rotated retainer blocks in labio-oral direction, while the center of rotation was located at the first incisors. This pattern was associated with intercanine expansion and excessive overjet correction during orthodontic treatment. The canines underwent the most pronounced (rotational and translational) movements. CONCLUSIONS In general permanent lingual retainers are safe but in special clinical cases retainers can induce undesired tooth movement. Risk factors seem to be intercanine expansion and excessive overjet correction during orthodontic treatment. In specific cases an additional retention device might be needed. AbstractObjectives. While permanent retention is today frequently the method of choice to stabilize orthodontic treatment outcomes, recent studies have increasingly reported posttreatment changes in tooth position during permanent retention. We conducted this study to analyze such changes in the anterior mandible, whether these follow an underlying movement pattern, and, aiming for a preventive strategy, whether any risk factors could be identified by comparing findings to the pretreatment situations. Methods.We included 30 patients who had worn a fixed Twistflex retainer extending from canine to canine in the mandible. Casts reflecting the intraoral situations before orthodontic treatment (T0), directly upon completion of active therapy (T1), and 6 months into retention (T2) were scanned and superposed using Imageware Surfacer software. Posttreatment changes (T2−T1) in tooth position inside the retainer block were analyzed on 3D virtual models and were compared to pretreatment (T0) and treatment-related (T1−T0) findings to identify potential risk factors.Results. Almost all patients revealed three-dimensional changes in tooth position within the retainer block. On comparing these movements...

show abstract

Section: Determination Of Treatment-related Risk Factorsmentioning

confidence: 99%

Post-treatment changes in permanent retention

Wolf

Schulte

Küpper³

et al. 2016

J Orofac Orthop

View full text Add to dashboard Cite

show abstract

“…Based on these limitations, the authors suggest that future research in this regard should aim at recruiting a large sample from diverse backgrounds, make best use of the advancing technology in the form of three-dimensional dental casts and three-dimensional scanning software (50 µ),[ 30 ] and placing specific emphasis on posterior Bolton's ratio because elucidation of overall ratio is often considered debatable. [ 31 ] Future studies may also focus on the differences in possible discrepancies among patients with varying types of malocclusions.…”

Section: Discussionmentioning

confidence: 99%

Outcome of premolar extractions on Bolton's overall ratio and tooth size discrepancies in South India

Varghese

Yerasi

Jose

et al. 2016

J Int Soc Prevent Communit Dent

View full text Add to dashboard Cite

Aims and Objectives:Attainment of ideal occlusion is often restricted by disproportionate sizes of individual teeth, which is otherwise termed as tooth size discrepancy (TSD). While extraction of teeth for orthodontic purposes is not uncommon, there is considerable resistance against this school of thought. The extraction of premolars, in particular, received considerable attention because of the potential TSD that could result following the extraction of premolars. The aim of the present study was to identify the consequence of premolar extractions on Bolton's overall ratios in South Indian population.Materials and Methods:One hundred participants were recruited into the study through purposive nonproportionate quota sampling. Pretreatment dental casts of the study participants were measured for mesiodistal tooth widths to determine Bolton's overall ratio before the hypothetical tooth extractions were performed. The hypothetical extractions were executed in four different combinations as follows: (a) Maxillary and mandibular first premolars, (b) maxillary first premolars and mandibular second premolars, (c) maxillary second premolars and mandibular first premolars, and (d) maxillary and mandibular second premolars. Bolton's overall ratios were calculated after the hypothetical tooth extractions were performed. Statistical analysis was done using the Statistical Package for the Social Sciences, version 20 software.Results:It was observed that extractions performed in any of the combinations followed in this study resulted in a decrease of overall Bolton's ratios. However, the discrepancy in tooth size was highest with the extraction of all first premolars, whereas least discrepancy was recorded with all second premolars extraction. It was also found that, based on the combination of teeth chosen for extraction, there was significant difference in Bolton's overall ratios between males and females.Conclusion:In formulating a treatment plan involving premolar extraction, significant tooth size discrepancies could change mutually after extraction.

show abstract

“…Digital modelling plays and important role in the orthodontic treatment replacing classical plaster casts by they digital models [21,22]. Digitalization of plaster casts are performed either by the 3D scanning or by processing of their stereophotos allowing to use numerical methods for evaluation of specific measures of dental arch [23,24].…”

Section: Segmentation and Three-dimensional Modelling In Orthodontiamentioning

confidence: 99%

History and biomedical applications of digital signal and image processing

Procházka

Vyšata

2014

2014 International Workshop on Computational Intelligence for Multimedia Understanding (IWCIM)

View full text Add to dashboard Cite

The paper presents in its initial part historical notes to the development of digital signal and image processing methods. The following case studies are devoted to their application in biomedicine and they include the use of computational intelligence in EEG and EMG signal processing, image segmentation and registration in orthodontia, the human-machine interaction and the three-dimensional modelling using MS Kinect in diagnostics and treatment of human motion disorders and neurological diseases. Associated comments include remarks and references to the development of modern computational tools, biosensors, wireless communication and data fusion used in assistive technologies and robotic systems. Mathematical tools common to all these applications form the next part of the paper that includes notes to spectral analysis, functional transforms, digital filtering, image enhancement, classification of multi-dimensional signal components and optimization using neural networks. Final remarks emphasize the interdisciplinary significance of the digital signal processing forming the integrating basis of many diverse research areas.Index Termshistory of digital signal and image processing, computational intelligence, digital signal processing methods, computer aided biomedical diagnostics and treatment, Microsoft Kinect three-dimensional modelling

show abstract

Evaluation of dental morphometrics during the orthodontic treatment

Cited by 10 publications

References 41 publications

Post-treatment changes in permanent retention

Post-treatment changes in permanent retention

Outcome of premolar extractions on Bolton's overall ratio and tooth size discrepancies in South India

History and biomedical applications of digital signal and image processing

Contact Info

Product

Resources

About