Reliability of Cephalometric Analysis Using Manual and Interactive Computer Methods

Davis, Darryl N.; Mackay, Frances

doi:10.1179/bjo.18.2.105

Cited by 26 publications

(22 citation statements)

References 6 publications

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“…In this work, four cephalometric measurements presented statistically significant differences: IMPA and 1-NA (Tables 1 and 4), both having landmarks related to dental structures, which is corroborated by other studies 1,2,14,15 ; FMA (Table 3), the angular measurement where the porion point is difficult to locate 3,7,18 ; H-nose (Table 4), linear measurement related to soft tissue 6 . Of the fourteen measurements evaluated by radiological clinics and for the control group, ten showed no statistically significant differences; the other four showed statistically significant differences, but at least one value obtained by the radiological clinics was always equivalent to the value obtained for the control group (Tables 1 through 5).…”

Section: Discussionsupporting

confidence: 89%

“…Therefore, one can consider that no difference was found to be significant for the results between the manual method and the digitized one, which is corroborated by other studies 4,13 . On the other hand, such results are not corroborated elsewhere 1,7,8,17 . As we have mentioned before, cephalometry is helpful for diagnosis, planning, and control of the treatment.…”

Section: Discussionmentioning

confidence: 62%

“…Some landmarks are commonly subjected to error because they are difficult to locate, thus making them less reliable 2,3,7,15,16,18,19 . In this work, four cephalometric measurements presented statistically significant differences: IMPA and 1-NA (Tables 1 and 4), both having landmarks related to dental structures, which is corroborated by other studies 1,2,14,15 ; FMA (Table 3), the angular measurement where the porion point is difficult to locate 3,7,18 ; H-nose (Table 4), linear measurement related to soft tissue 6 .…”

Section: Discussionmentioning

confidence: 99%

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Comparison of cephalometric measurements from three radiological clinics

Gonçalves¹,

Schiavon²,

Neto³

et al. 2006

Braz. oral res.

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ABSTRACT:The orthodontic documentation carried out in radiological clinics is essential for diagnosis, planning and control of the orthodontic treatment. Amongst the diagnosis elements used are the cephalometric measurements, and errors can be incorporated as they are obtained. The objective of this work was to evaluate the values of some cephalometric measurements obtained in three radiological clinics using 30 lateral cephalometric radiographs of the head randomly chosen from the archives of the Department of Child Dentistry (Discipline of Orthodontics), School of Dentistry of Piracicaba, UNICAMP. These values were compared with the measurements obtained manually (control group) using variance analysis and Tukey's and Friedman's tests. Of the fourteen cephalometric measurements evaluated, the results demonstrated that only four of them presented statistically significant differences: IMPA, 1-NA, FMA, and H-nose. We concluded that although the majority of the mean cephalometric values did not present statistically significant differences, a great variability in the results was found when all the radiographic values were compared. This variability may influence the interpretation of the cephalometric measurements. Hence, we suggest that when the practitioner receives orthodontic documentation, he/she should redo the cephalometric analysis and compare the measurement values found with those presented to him. In addition, the practitioner should be prepared to use other elements for diagnosis, planning and control of the orthodontic treatment. DESCRIPTORS: Cephalometry; Observation variations; Diagnostic errors. RESUMO:A documentação ortodôntica realizada em clínicas radiológicas é essencial para diagnóstico, planejamento e controle do tratamento ortodôntico. Dentre os elementos de diagnóstico utilizados estão as grandezas cefalométricas, e erros podem ser incorporados durante a obtenção das mesmas. O objetivo deste trabalho foi avaliar os valores de algumas grandezas cefalométricas obtidas em três clínicas radiológicas, utilizando-se 30 telerradiografias da cabeça em norma lateral, escolhidas ao acaso, do arquivo do Departamento de Clínica Infantil (Disciplina de Ortodontia) da Faculdade de Odontologia de Piracicaba -UNICAMP. Esses valores foram comparados com os das grandezas obtidas manualmente (grupo controle), utilizando-se a análise de variância e os testes de Tukey e Friedman. Os resultados demonstraram que das 14 medidas cefalométricas avaliadas, apenas 4 apresentaram diferenças estatisticamente significantes: IMPA, 1-NA, FMA, e H-nariz. Concluímos que apesar de a maioria dos valores médios das grandezas cefalométricas não apresentarem diferenças estatisticamente significantes, ao compararmos todos os valores obtidos em cada uma das radiografias, encontramos grande variabilidade nos resultados, o que pode interferir na interpretação das grandezas cefalométricas. Assim, os autores sugerem ao ortodontista, quando receber a documentação ortodôntica, realizar novamente as análises cefalométricas para comparar ...

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 62%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of cephalometric measurements from three radiological clinics

Gonçalves¹,

Schiavon²,

Neto³

et al. 2006

Braz. oral res.

View full text Add to dashboard Cite

show abstract

“…The studies related to the same theme and with a similar purpose as this research, reviewed in literature, show a lack of criteria with regard to the choice of cephalometric landmarks and the ideal linear/angular measurements to be used in studies of this nature. 3,4,6,7,12,16 Justifications can be made with regard to the selection of landmarks and cephalometric measurements in this type of work, as exemplified in the ease of locating the landmarks, providing higher reliability and precision, which can directly influence the measurement, 13,17,18 as the reproducibility of the measurement is part of different types of cephalometric analysis proposed by several authors. 2,5,7,8,11,16 The manual method required higher time expenditure, but it is the most common method for tracing, identifying landmarks, measuring distances and angles between the locations of the landmarks, 15 in addition to having a high possibility of error.…”

Section: Discussionmentioning

confidence: 99%

“…16 With the advent of the computer-assisted method, a decrease in the differences of cephalometric measurements began to be observed, as the precision of the measurements became significantly more accurate due to the intrinsic characteristics of measuring computer pixels. 7 The computer reduced, although discretely, the possibility of differences, as it is more secure than the manual method. When locating landmarks defined as being more inferior or deep in a given bone contour-for instance, points A, B and N-the computerized method proved to be more reliable than the manual method.…”

Section: Discussionmentioning

confidence: 99%

Estudo comparativo das análises cefalométricas manual e computadorizada

Guedes

Souza

Tuji

et al. 2010

Dental Press J. Orthod.

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OBJETIVO: realizar uma análise comparativa dos traçados manual e computadorizado utilizando um software específico, com a finalidade de definir os resultados inter e intra-avaliadores. MÉTODOS: foi utilizada uma amostra composta por 50 radiografias cefalométricas em norma lateral, sendo todas padronizadas, contendo pacientes de ambos os gêneros e de várias faixas etárias. A análise das radiografias foi realizada por dois avaliadores, os quais realizaram os traçados manuais e computadorizados das 50 radiografias. Para compor as medições, foram selecionadas medidas angulares e lineares, que posteriormente foram submetidas ao teste estatístico de Mann-Whitney, com o objetivo de comparar os resultados entre os dois tipos de traçados inter e intra-avaliadores. RESULTADOS E CONCLUSÕES: conclui-se que pode ser aumentada a confiança nos traçados cefalométricos computadorizados, haja vista que as discrepâncias encontradas entre as medidas dos traçados cefalométricos manual e computadorizado inter e intra-avaliadores, em sua maioria, não foram estatisticamente significativas.

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Computer-aided automated landmarking of cephalograms

Stamm

Brinkhaus

Ehmer

et al. 1998

J Orofac Orthop/Fortschr Kieferorthop

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The computer-aided method presented is able to interpret and measure radiological structures automatically and reproducibly on a large number of randomly selected lateral head films of different film quality. For example the hard and soft tissue expression of the profile is used to discuss method, application and disadvantages. The performance of the system depends on image quality. The algorithm cannot be influenced by opacifications due to metal structure. In 90% of all cases the contours are identified correctly. Even if the image quality is poor, the recognition rate is about 84%. The selected cephalometric landmarks are placed in the right way in 85% of all cases. The constraint mathematical conditions and the high reproducibility improve the quality process of the cephalometric analysis. Recognition rates of 84% to 90% justify even nowadays the routine use of semi-automatic systems in PC-based analysis. With advancing digital radiography and improved computer performance, image interpreting systems will certainly become established.

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Reliability of Cephalometric Analysis Using Manual and Interactive Computer Methods

Cited by 26 publications

References 6 publications

Comparison of cephalometric measurements from three radiological clinics

Comparison of cephalometric measurements from three radiological clinics

Estudo comparativo das análises cefalométricas manual e computadorizada

Computer-aided automated landmarking of cephalograms

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