Reproducibility of Cephalometric Measurements

Sandler, Paul Jonathan

doi:10.1179/bjo.15.2.105

Cited by 112 publications

(82 citation statements)

References 5 publications

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“…However, as to the anterior inferior facial height, the discrepancy was evident ( figure 2A), showing statistically significantly more improvement in response to treatment with the appliances, as occurred in other studies 1,12,13,18,21,22,25 . This behavior was followed by the corresponding tegument facial height (figure 2B), thus with larger values, probably because of the major nasal base stability in comparison with the anterior nasal spine.…”

supporting

confidence: 69%

“…Like Houston 16 and Sandler 25 stated, errors smaller than 1.5 o or 1mm are not clinically important. Analyses of the reliability of the cephalometric tracing method used demonstrated that the difference was significant only for three variables, showing good reproducibility, and the analyses of variance could not find statistical differences between the initial values of the three groups, except for one variable.…”

Section: Methodology Reliabilitymentioning

confidence: 88%

“…This result may be assigned to elongation of the lower lip, since it should be considered that the lower lip is frequently positioned behind the maxillary anterior teeth in Class II cases, and this led to lip deflection and deep mentolabial sulcus. As the orthopedic treatment induces lingual tipping of the maxillary incisors and proclination of the mandibular incisors, and then a reduction in overjet 1,7,9,10,12,13,17,19,21,23,25 , the physical obstruction of the incisors will be eliminated, …”

mentioning

confidence: 99%

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Influence of orthopedic treatment on hard and soft facial structures of individuals presenting with Class II, Division 1 malocclusion: a comparative study

et al. 2004

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he purpose of this investigation was to comparatively evaluate the cephalometric changes in soft and hard tissues related to treatment of Class II, division 1 malocclusion with activator-headgear and Bionator appliances. Twenty-four individuals formed the activator-headgear group and twenty-five comprised the Bionator group, while other twenty-four presenting the same malocclusion did not receive any intervention and served as controls. Lateral headfilms were taken at the beginning and at the end of the observation period and were digitized with computerized cephalometrics; cephalometric analysis was performed and the results were submitted to statistical test. According to the methodology employed, our findings suggested that both appliances do not significantly alter the growth path, and also they were not able to modify the posterior inferior height and the sagittal and vertical position of the upper lip. The lower lip and the soft menton were only slightly modified by the orthopedic appliances, but the mentolabial sulcus showed a significant decrease in deepness compared to the control group. Of statistical significance, only the anterior inferior hard and soft facial heights and the lower lip height increased more in the treated groups. UNITERMS: Malocclusion; Orthopedics; Removable appliances. sta pesquisa teve por objetivo avaliar, comparativamente, as alterações cefalométricas tegumentares e esqueléticas, decorrentes do tratamento das más oclusões de classe II, 1a divisão, com o ativador combinado com a ancoragem extrabucal e com o bionator. O grupo tratado com o ativador combinado com a ancoragem extrabucal foi composto por 24 indivíduos e o grupo tratado com o bionator compreendeu 25 pacientes, enquanto que outros 24 indivíduos compuseram o grupo controle, apresentando a mesma má oclusão, porém sem terem sido submetidos a nenhuma terapia ortodôntica. Obteve-se telerradiografias laterais de todos os indivíduos no início e final do período de observação que foram digitalizadas e seus traçados cefalométricos computadorizados realizados e submetidos ao teste estatístico. De acordo com a metodologia empregada, os resultados sugerem que ambos os aparelhos não foram capazes de alterar, significaticamente, o padrão de crescimento facial assim como a altura facial posterior inferior e o posicionamento sagital e vertical do lábio superior. Os aparelhos ortopédicos alteraram ligeiramente o lábio inferior e o mento tegumentar, porém o sulco mentolabial foi signifivativamente reduzido nos grupos tratados em comparação com o grupo controle. As alturas faciais esquelética e tegumentar, bem como a altura do lábio inferior foram significativamente aumentadas com a terapia ortopédica, alcançando diferença estatística em relação ao grupo controle.

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supporting

confidence: 69%

Section: Methodology Reliabilitymentioning

confidence: 88%

mentioning

confidence: 99%

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Influence of orthopedic treatment on hard and soft facial structures of individuals presenting with Class II, Division 1 malocclusion: a comparative study

et al. 2004

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“…5,7,13,17,20,21,23 Its accuracy depends on the anatomical structure used, the radiographic image quality, visual acuity and experience of the operator on locating the landmarks, considering that great care must be taken so that measurement errors do not influence the study. 5,7 In order to avoid the incorporation of errors in the identification of landmarks, we chose to fixate 1-mm radiopaque spheres in selected regions of the dry skull.…”

Section: E6mentioning

confidence: 99%

Evaluation of radiographic magnification in lateral cephalograms obtained with different X-ray devices: experimental study in human dry skull

Neto¹,

Paiva²,

Queiroz³

et al. 2013

Dental Press J. Orthod.

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Objective: The purpose of this study was to evaluate the influence of the magnification factor of the radiographic image in angular, linear and proportional measurements. Methods: From a dried human skull where metallic spheres with predetermined size were fixed (1.0 mm), 14 radiographs were obtained in devices of three different manufacturers: Panoura, Instrumentarium and Tomeceph. The Pearson correlation test was used to investigate the relationship between the rate of radiographic magnification and the cephalometric measurements assessed. Results: According to the results, the linear measurements showed a high positive correlation, pointing out great influence of the magnification factor, while the angular and proportional measurements did not correlate. Conclusions: Comparisons between linear cephalometric measurements obtained with different devices from the same manufacturer showed maximum rates of expansion of 0.6%, 1.25% and 2.3%, respectively, for the devices from Instrumentarium (OP-100, Instrumentarium, Finland), Panoura (10CSU, Yoshida, Japan) and Satelec/Tomeceph (XMind, Satelec/Tomeceph Orion Corporation, Finland). Keywords:Orthodontics. Diagnostic. Radiograph. Radiographic magnification.Objetivo: avaliar a influência do fator de magnificação da imagem radiográfica nas grandezas angulares, lineares e proporcionais.Métodos: a partir de um crânio seco humano, no qual foram fixadas esferas metálicas de dimensões pré-definidas (1,0mm de diâmetro), 14 telerradiografias foram obtidas em diferentes aparelhos de três fabricantes: Panoura, Instrumentarium e Tomeceph.Foi realizada a análise estatística descritiva e utilizado o teste de correlação de Pearson para verificar a relação entre a taxa de magnificação radiográfica e as grandezas cefalométricas analisadas. Resultados: as medidas lineares apresentaram alta correlação positiva, evidenciando grande influência do fator de magnificação sobre essas grandezas, ao passo que as angulares e proporcionais não apresentaram correlação. Conclusão: comparações entre medidas cefalométricas lineares obtidas com diferentes aparelhos do mesmo fabricante demonstraram taxas de ampliações máximas de 0,6%, 1,25% e 2,3%, respectivamente, para os aparelhos Instrumentium (OP-100 Instrumentarium), Panoura (10CSU Yoshida) e Satelec/Tomeceph (XMind Satelec/Tomeceph Orion Corp).Palavras-chave: Ortodontia. Diagnóstico. Radiografia. Ampliação radiográfica.

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“…Traditional cephalometric analysis performed by tracing radiographic landmarks on acetate overlays and measuring with the use of protractor is very time consuming and has several drawbacks, including a high risk of errors during hand tracing, landmark identification and measurement. 1,2 Cephalometric errors can be divided into acquisition, identification and technical measurement errors. Research carried out on conventional cephalometrics proved landmark identification to be the main source of error.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Cephalometric Measurements Obtained with Conventional and Digital Methods and their Reproducibility

Kalra

Goel

Thadani

et al. 2010

JIAOMR

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Reproducibility of Cephalometric Measurements

Cited by 112 publications

References 5 publications

Influence of orthopedic treatment on hard and soft facial structures of individuals presenting with Class II, Division 1 malocclusion: a comparative study

Influence of orthopedic treatment on hard and soft facial structures of individuals presenting with Class II, Division 1 malocclusion: a comparative study

Evaluation of radiographic magnification in lateral cephalograms obtained with different X-ray devices: experimental study in human dry skull

Comparison of Cephalometric Measurements Obtained with Conventional and Digital Methods and their Reproducibility

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