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. 2011 May-Jun;19(3):228-32.
doi: 10.1590/s1678-77572011000300009.

Radiopacity evaluation of Portland and MTA-based cements by digital radiographic system

Alvaro Henrique Borges  1 , Fabio Luiz Miranda Pedro, Alex Semanoff-Segundo, Carlos Eduardo Saraiva Miranda, Jesus Djalma Pécora, Antônio Miranda Cruz Filho
Affiliations

Radiopacity evaluation of Portland and MTA-based cements by digital radiographic system

Alvaro Henrique Borges et al. J Appl Oral Sci. 2011 May-Jun.

Abstract

Objective: The aim of the present study was to evaluate the radiopacity of Portland and MTA-based cements using the Digora TM digital radiographic system.

Material and methods: The performed tests followed specification number 57 from the American National Standard Institute/American Dental Association (2000) for endodontic sealing materials. The materials were placed in 5 acrylic plates, especially designed for this experiment, along with a graduated aluminum stepwedge varying from 1 to 10 mm in thickness. The set was radiographed at a 30 cm focus-object distance and with 0.2 s exposure time. After the radiographs were taken, the optical laser readings of radiographs were performed by Digora TM system. Five radiographic density readings were performed for each studied material and for each step of the aluminum scale.

Results: White ProRoot MTA (155.99±8.04), gray ProRoot MTA (155.96±16.30) and MTA BIO (143.13±16.94) presented higher radiopacity values (p<0.05), while white non-structural Portland (119.76±22.34), gray Portland (109.71±4.90) and white structural Portland (99.59±12.88) presented lower radiopacity values (p<0.05).

Conclusions: It was concluded that MTA-based cements were the only materials presenting radiopacity within the ANSI/ADA specifications.

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Figures

Figure 2
Figure 2
Experimental set-up used to fix x-ray machine central beam and the acrylic plates/phosphor plate set at a focusobject distance of 30 cm. In greater magnification, experimental set-up with the aluminium stepwedge, wells for root canal filling materials and radiography digital phosphor plate
Figure 3
Figure 3
Radiopacity of cements in comparison with steps of the aluminium scale. The black color relates to cements whose radiopacity density (mm Al) fulfills the ANSI-ADA specification number 57 (step 3). The white color refers to cements with radiopacity lower than the value recommended by the ANSI-ADA
See this image and copyright information in PMC

References

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