Multidimensional Scaling for Orthodontic Root Resorption

Preoteasa, Cristina Teodora; Ionescu, Ecaterina; Preoteasa, Elena; Machado, J. A. Tenreiro; Baleanu, Mihaela Cristina; Băleanu, Dumitru

doi:10.1155/2013/383698

Cited by 6 publications

(10 citation statements)

References 32 publications

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“…Root shortening was detected in 62% of the upper central incisors, 53% of upper lateral incisors, 48% of upper second premolars, 48% of lower lateral incisors, 50% of lower canine, and 51% of lower second premolars, with a formula previously proposed [19].…”

Section: Age Distributionmentioning

confidence: 70%

“…The reported frequency of external root resorption is about 100% when it is examined under microscopy. When it is quantified on periapical or panoramic radiographs, the frequency falls to 70%, with a mean reported value of root shortening of 1.42 ± 0.44 mm and 1% to 5% of the cases with a loss of 4mm or one-third of root length [19]. In addition, maxillary teeth are more sensitive than mandibular teeth to root resorption.…”

Section: Discussionmentioning

confidence: 99%

“…R 2 values were computed to examine the amount of variance explained by the predictor variables. The formula proposed by Preoteasa et al [19] was used to calculate the percentage of teeth with root shortening.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Changes in age estimation standards secondary to full fixed edgewise orthodontic treatment

Marroquin¹,

Karkhanis²,

Vasudavan³

et al. 2017

Eur J Forensic Sci

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Objective: The aim of this cohort study was to evaluate if the side effects of orthodontic treatment have any significant impact when the Kvaal et al., method is used for dental age estimation. The objective of this study was to observe the potential effects of orthodontic treatment on the accuracy of the age estimation, as performed using the Kvaal et al. Standards when it was applied on individuals before and after orthodontic treatment. Materials and Methods: Following the methodological approach of Kvaal et al., odontometric measurements were acquired, and the data were statistically analyzed to develop age estimation regression models. The total number of radiographs analyzed was 182 (644%, n = 58) female and 36% (n= 33) male. The ages ranged from 12 to 50 years for females (mean age 22 years) and 12-52 years for males (mean age 22 years) before starting the treatment. The average length of the treatment was 2.2 years for both females and males. Results: It was observed that the standard error of estimate for the regression models did not change dramatically for the pre-and post-treatment data. Conclusions: It is recommended that similar analyses be performed for other methods of dental age estimation, for example, methods based on cone-beam computer tomography or microfocus computer tomography. These novel approaches, though more accurate, are also potentially more sensitive to dental changes caused by orthodontic treatment.

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Section: Age Distributionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Changes in age estimation standards secondary to full fixed edgewise orthodontic treatment

Marroquin¹,

Karkhanis²,

Vasudavan³

et al. 2017

Eur J Forensic Sci

View full text Add to dashboard Cite

show abstract

“…It has been reported that orthodontic treatment causes mechanical trauma to the periodontal ligament and induces pulpal reactions . The most frequently reported side effect is external root resorption, a process characterized by the destruction of root structure , with the subsequent diminution of root length (mean reported value of 1.42 ± 0.44 mm) . Another side effect is the reduction in pulp chamber dimensions, owing to secondary dentine formation .…”

Section: Discussionmentioning

confidence: 99%

Orthodontic Treatment: Real Risk for Dental Age Estimation in Adults?

Peñaloza

Karkhanis

Vasudavan

et al. 2017

Journal of Forensic Sciences

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Dental age estimation becomes a challenge once the root formation is concluded. In living adults, one dental age indicator is the formation of secondary dentine, also associated with orthodontic treatment as well as root shortening. The aim of this study was to establish whether these secondary effects of orthodontic treatment could generate a statistically significant difference in dental age estimations when using Kvaal's method. The study sample included 34 pairs of pre- and postorthodontic panoramic radiographs, from different individuals with exactly the same age and sex distribution. Females 65%, median age 17.5 years, and males 35%, median age 22.5 years, were included. After data collection, dental age was estimated per tooth using formulae previously published. The risk of obtaining over-estimation of age was calculated. (RR = 1.007). The changes caused by orthodontic treatment do not have any significant effect on age estimation when Kvaal et al.'s method is applied on panoramic radiographs.

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“…MDS tools have been widely used in finance, social sciences, biology, and other disciplines (Preoteasa et al 2013), but studies in seismology remain scarce. Previous works may be found in Dzwinel et al (2005).…”

Section: Introductionmentioning

confidence: 99%

Multidimensional scaling visualization of earthquake phenomena

et al. 2013

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Earthquakes are associated with negative events, such as large number of casualties, destruction of buildings and infrastructures, or emergence of tsunamis. In this paper, we apply the Multidimensional Scaling (MDS) analysis to earthquake data. MDS is a set of techniques that produce spatial or geometric representations of complex objects, such that, objects perceived to be similar/distinct in some sense are placed nearby/distant on the MDS maps. The interpretation of the charts is based on the resulting clusters since MDS produces a different locus for each similarity measure.In this study, over three million seismic occurrences, covering the period from January 1, 1904 up to March 14, 2012 are analyzed. The events, characterized by their magnitude and spatiotemporal distributions, are divided into groups, either according to the FlinnEngdahl seismic regions of Earth or using a rectangular grid based in latitude and longitude coordinates. Spacetime and Space-frequency correlation indices are proposed to quantify the similarities among events. MDS has the advantage of avoiding sensitivity to the nonuniform spatial distribution of seismic data, resulting from poorly instrumented areas, and is well suited for accessing dynamics of complex systems. MDS maps are proven as an intuitive and useful visual representation of the complex relationships that are present among seismic events, which may not be perceived on traditional geographic maps. Therefore, MDS constitutes a valid alternative to classic visualization tools, for understanding the global behavior of earthquakes.

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Multidimensional Scaling for Orthodontic Root Resorption

Cited by 6 publications

References 32 publications

Changes in age estimation standards secondary to full fixed edgewise orthodontic treatment

Changes in age estimation standards secondary to full fixed edgewise orthodontic treatment

Orthodontic Treatment: Real Risk for Dental Age Estimation in Adults?

Multidimensional scaling visualization of earthquake phenomena

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