Prediction of premolar tooth lengths based on their panoramic radiographic lengths

Yitschaky, Michael; Haviv, Yaron; Aframian, Doron J.; Abed, Yossi; Redlich, Meir

doi:10.1259/dmfr/31287277

Cited by 11 publications

(9 citation statements)

References 7 publications

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“…They have found that the magnification is similar on the right and left sides (Yitschacky et al, 2004), which is similar to the results of the present study. However, in these studies the magnification was greater in the maxilla than in the mandible, contrary to what was found in the present work.…”

Section: Discussionsupporting

confidence: 92%

Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph

Zúñiga

2017

Int. J. Morphol.

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ZÚÑIGA, J. Quantification by quadrants of the distortion present in conventional panoramic radiograph. Int. J. Morphol., 35(1):265-272, 2017. SUMMARY:The panoramic radiograph constitutes the "gold standard" for any clinical evaluation in dentistry. It has been universally accepted that it has a global distortion of 25 % due to magnification. The present study was carried out to determine more precise percentages of distortion, and to find out whether the distortion was due to magnification or minimization. Thirty skulls with their mandibles were divided by two horizontal and four vertical planes in ten quadrants. Wires of different lengths were fixed in each of these quadrants. A panoramic radiograph was taken for each skull. The lengths of the wires measured in the images (distorted value) were compared to the actual lengths of the wires (real value). The concordance correlation coefficient was calculated. Due to high bone density, in the upper lateral quadrants (1 and 5) no measurements could be obtained. In the intermediate upper quadrants (2 and 4) and in the median lower quadrant (8), the horizontal measurements were minimized, while in the intermediate inferior quadrants (7 and 9) and in the lateral inferior quadrants (6 and 10), the horizontal measurements were magnified. In both the upper and the lower quadrants (2, 3, 4, 6, 7, 8, 9, 10) all the vertical measurements were magnified. The percentage of distortion in each quadrant for the horizontal and vertical measurements was reported. The percentage of distortion in a panoramic radiograph of the face varies from one region to another and can be due to either magnification or minimization.

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Section: Discussionsupporting

confidence: 92%

Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph

Zúñiga

2017

Int. J. Morphol.

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“…In reality, this ideal is unattainable, and thus dimensional accuracy of panoramic radiography is often impossible. With this in mind, magnification has been reported to range between 14% and 26% 6,7 ; however, in this study, magnification was between 27.5% and 29.3%. In this in-vitro experiment, the reported ideal anteroposterior angulation was 90 to the horizontal plane (floor); this is not equivalent to the ideal cephalometric angulations for the maxillary incisors (110 to the palatal plane) or the mandibular incisors (95 to the mandibular plane).…”

Section: Discussioncontrasting

confidence: 59%

Impact on perceived root resorption based on the amount of incisal inclination as determined from conventional panoramic radiography

Tieu

Normando²,

Toogood

et al. 2015

American Journal of Orthodontics and Dentofacial Orthopedics

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“…1990a). From one study which calculated the difference in radiographic estimated root length compared to actual root length of completed first premolars a regression model was formulated to accurately predict root length (Yitschaky et al. 2004).…”

Section: Discussionmentioning

confidence: 99%

The design and development of surgical templates for premolar transplants in adolescents

Day¹,

Lewis²,

Spencer³

et al. 2012

Int Endodontic J

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The aim of designing and fabricating the surgical templates was to assist the surgical component of premolar transplantation, by establishing and replicating the root dimensions of the donor premolar tooth. The correct template could be used to assess the socket preparation (width and depth) prior to placement of the transplant in the recipient site, obviating the need to repeatedly try the donor tooth for fit at the recipient site, thereby minimising trauma to the periodontal ligament of the donor tooth. Seventy-five mandibular premolars and 50 maxillary second premolars were selected with varying stages of root development. All teeth had been extracted for orthodontic reasons. The root was measured for its length (maxL) and maximum (maxW) and minimum width (minW) with digital callipers from standardised reference points. These measurements were then used in the design of premolar transplant templates. The mean measurements for second maxillary premolars were maxL 14.6 mm (± 1.7), maxW 8.3 mm (± 0.5) and minW 4.9 (± 0.3). The mean measurements for mandibular premolars were maxL 14.8 (± 1.6), maxW 7.4 (± 0.6) and minW 5.3 (± 0.5). From these measurements, a range of maxillary second premolar and mandibular premolar templates have been fabricated. These figures also inform the multidisciplinary planning process for the space requirements at the donor site prior to transplantation.

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Prediction of premolar tooth lengths based on their panoramic radiographic lengths

Abstract: Prediction of all first premolar lengths using their panoramic images is both feasible and reliable.

Cited by 11 publications

References 7 publications

Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph

Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph

Impact on perceived root resorption based on the amount of incisal inclination as determined from conventional panoramic radiography

The design and development of surgical templates for premolar transplants in adolescents

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