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

Abstract

ObjectiveThe 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 MethodsThe 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.ResultsWhite 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).ConclusionsIt was concluded that MTA-based cements were the only materials presenting radiopacity within the ANSI/ADA specifications.

Radiopacity of Mineral Trioxide Aggregate with and without Inclusion of Silver Nanoparticles

“…It is known that dentin of 1 mm thickness is equivalent to an 1 mm aluminum scale, meaning that the material should have a radiopacity of at least 3 mm Al. 13,[18][19][20] Although these specifications are actually for sealers, they are an equivalence based on the fact that both materials will be in contact with periodontal and periapical tissues under clinical conditions. 18 The aluminum step-wedge is widely used to measure the radiopacity of the material and its measurement made through digital software minimizes potential errors due to visual acuity.…”

“…13,[18][19][20] Although these specifications are actually for sealers, they are an equivalence based on the fact that both materials will be in contact with periodontal and periapical tissues under clinical conditions. 18 The aluminum step-wedge is widely used to measure the radiopacity of the material and its measurement made through digital software minimizes potential errors due to visual acuity. 10,14,15,18 The use of nanotechnology in this study was based on the reality in all areas of knowledge, with positive results in our experiments.…”

“…18 The aluminum step-wedge is widely used to measure the radiopacity of the material and its measurement made through digital software minimizes potential errors due to visual acuity. 10,14,15,18 The use of nanotechnology in this study was based on the reality in all areas of knowledge, with positive results in our experiments. 29 In dentistry, NPs have demonstrated to improve antibacterial and osteoinductive properties.…”

“…57/2000 and ISO 6876/2001, the radiopacity of the endodontic materials must be ≥3 mm of aluminum equivalent, which is found in the MTA. [18][19][20] The addition of substances to sealers can change the radiopacity. 17 Bortoluzzi et al 17 Nanotechnology enables preventing and combating diseases by using nanoscale materials.…”

Evaluation of the Radiopacity of a Mta-Based Root-Canal Filling Material Using Digital Radiography

“…Radiopacity of an endodontic material provides a contrast between adjacent anatomical structures and filling material; and it improves the radiographic diagnosis of voids and improper contours (14,19). The molecular structure and the thickness of a material have a major effect on the radiopacity.…”