The analysis of errors in orthodontic measurements

Houston, W. J. B.

doi:10.1016/0002-9416(83)90322-6

Cited by 1,531 publications

(910 citation statements)

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“…The data was used to determine intra-examiner systemic and random error according to Houston. 24 Systemic error was assessed using a StudentÕs t-test and random error was examined using correlation coefficient.…”

Section: Discussionmentioning

confidence: 99%

Immediate effects of rapid maxillary expansion on the naso-maxillary facial soft tissue using 3D stereophotogrammetry

et al. 2016

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Section: Discussionmentioning

confidence: 99%

Immediate effects of rapid maxillary expansion on the naso-maxillary facial soft tissue using 3D stereophotogrammetry

et al. 2016

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“…The standard error for each cephalometric value was calculated. Student's paired t-test 15 was used to determine systematic error and P value, for these differences were not found to be significant. Pearson correlation coefficient showed a statistically significant range for the reliability of observations.…”

Section: Methodsmentioning

confidence: 99%

Effect of retraction of anterior teeth on pharyngeal airway and hyoid bone position in Class I bimaxillary dentoalveolar protrusion

Bhatia

Jayan

Chopra³

2016

Medical Journal Armed Forces India

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m e d i c a l j o u r n a l a r m e d f o r c e s i n d i a 7 2 ( 2 0 1 6 ) s 1 7 -s 2Background: To test the hypothesis that the retraction of anterior teeth has no effect on the dimensions of pharyngeal airway and to evaluate the retraction of anterior teeth on each parameter of pharyngeal airway. Methods: Twenty-two adult patients of Class I bimaxillary protrusion requiring first premolar extractions with maximum anchorage requirements were selected. The pharyngeal airway and dentofacial parameters of the patients were compared using pre-and posttreatment lateral cephalograms with the help of Student's paired t-test (P < 0.05). The relationship between airway size and dentofacial parameters was also evaluated using Pearson correlation coefficient. Results: The upper and lower lips were retracted by 2.25 and 5.4 mm after retraction of the incisors. The tips of upper and lower incisors were retracted by 7.75 and 7.15 mm, respectively. There was a statistically significant decrease in SPP-SPPW (P < 0.05), U-MPW (P < 0.001), TB-TPPW (P < 0.001), and change in HRGN (P < 0.01). A significant correlation was observed between the amount of retraction of lower incisor and decrease in the pharyngeal airway posterior to soft palate (r = 0.102), tongue (r = 0.322), and change in HRGN (r = 0.265). Conclusions: The size of the pharyngeal (velopharyngeal and glossopharyngeal) airway reduced and hyoid bone position changed after retraction of the incisors in extraction space in bimaxillary protrusive adult patients. #

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“…An error of the method analysis was carried out in order to calculate the random error (RE) of the method, as described by Houston, 13 by repeating the cephalometric tracings on 15 randomly selected lateral cephalometric radiographs from the patient sample, within a 3 week interval. Dahlberg's formula 14 was used in order to calculate the error.…”

Section: Methodsmentioning

confidence: 99%

Orientation of the occlusal plane in a Class I adult population

Antonarakis

Kiliaridis

Scolozzi

2013

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

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Objective. To primarily evaluate whether Delaire's ideal occlusal plane is present in Class I occlusal relationship adults. Study Design. Pretreatment lateral cephalometric radiographs from 30 orthodontically untreated Caucasian Class I malocclusion adults were obtained. The occlusal, mandibular, and maxillary planes were traced and compared with the ideal occlusal, mandibular, and maxillary planes according to Delaire. Results. The average occlusal plane was 3.5 below the ideal plane. This divergence was more pronounced in males, and in patients presenting with a hypodivergent skeletal pattern. The maxillary plane displayed on average less than 0.5 of divergence to the ideal. The average mandibular plane showed a divergence of 3.3 below the ideal. Conclusions. When aiming to obtain an ideal orientation of the occlusal plane postoperatively, one must keep in mind that in Class I occlusal relationship adults without any dentofacial disharmony, the occlusal plane is rarely coincident with the ideal plane. (Oral Surg Oral Med Oral Pathol Oral Radiol 2013;116:35-40) The orientation of the occlusal plane is often a factor used by maxillofacial surgeons both in predicting optimal functional and esthetic results, and in predicting the stability of a certain operative procedure. [1][2][3] It is thought to be true that if the postoperative occlusal plane is not coincident with the 'ideal' occlusal plane, then the risk for postoperative surgical relapse is increased. For this reason, when performing preoperative surgical planning and perioperative surgical positioning of the jaws, one of the objectives may be to establish the position of the occlusal plane and the jaws in accordance with cephalometric treatment planning. 4,5 This may involve the surgeon performing a rotation of the maxillomandibular complex 6 in order to improve both facial balance and the occlusal plane angle which ultimately is thought to favor occlusal stability.Delaire 7,8 developed a cephalometric analysis, referred to as the architectural and structural craniofacial cephalometric analysis, and discussed its application in the treatment of cranio-maxillo-facial anomalies. This method is often used for orthognathic treatment planning. [9][10][11][12] Delaire proposed that the occlusal plane, stated to pass through the occlusal surfaces of the premolars, in an ideal situation was meant to pass through the inferior part of the skull (a point referred to as the mandibularoccipital point, Om, in the original analysis). Moreover, the occlusal plane, again in an ideal situation, was meant to meet with the maxillary and mandibular planes at this same point (Figure 1). This implies a balance between the maxillary, mandibular, and occlusal planes in relation to the craniospinal articulation and the postero-inferior part of the skull. 8 This proposition by Delaire is, to the best of our knowledge, based on his clinical experience and thus on empirical evidence. There is no clear or available scientific evidence, unless based on unpublished data, which substa...

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The analysis of errors in orthodontic measurements

Cited by 1,531 publications

References 16 publications

Immediate effects of rapid maxillary expansion on the naso-maxillary facial soft tissue using 3D stereophotogrammetry

Immediate effects of rapid maxillary expansion on the naso-maxillary facial soft tissue using 3D stereophotogrammetry

Effect of retraction of anterior teeth on pharyngeal airway and hyoid bone position in Class I bimaxillary dentoalveolar protrusion

Orientation of the occlusal plane in a Class I adult population

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