Tru-Align Research

Below you will find a wealth of research on the Tru-Align, including links to and summaries of research papers, white papers and peer-reviewed articles on all aspects of Dental Radiology, including research from the National Academy of Science, the American Dental Association and the FDA. There are also studies on rectangular collimation and the Tru-Align aiming device.

A comparison between bitewing radiographs taken with rectangular and circular collimators in UK military dental practices: a retrospective study

LA Parrott and SY Ng, Dentomaxilofacial Radiology (2011) 40, 102-109, British Institute of Radiology

This study provides evidence that rectangular collimation did not significantly affect the diagnostic yield of bitewing radiographs despite the presence of cone cut. Therefore, all practitioners should adopt rectangular collimation.

The Use of Dental Radiographs, Update and recommendations

The American Dental Association Council on Scientific Affairs, JADA, Vol. 137, Sept 2006

This report discusses implementation of proper radiographic practices. This includes a recommendation to use rectangular collimation for exposure of periapical and bitewing radiographs in order to reduce the radiation dose to the patient by up to fivefold. The report concludes that “practitioners should remain informed on safety updates and the availability of new equipment, supplies and techniques that could further improve the diagnostic ability of radiographs and decrease exposure.”

The ALARA principle: Do you know what it is?

Hoos, J. C. & Razzano M. V., Dental Economics

This report discusses how using rectangular collimation and faster speed film helps dental practices adhere to the ALARA (As Low As Reasonably Achievable) principle. The use of digital dental X-ray is noted to be another way to further reduce patient/staff exposure.

Evaluation of Radiation Exposure With the Tru-Align Intraoral Rectangular Collimation System Using OSL Dosimeters

Colosi, D.C., et al.

This study compares dental radiation exposure levels both to the patient (skin entrance and exit dose measurements) and the dental image sensor. Comparisons were made between a cylindrical collimator and the Tru-Align rectangular collimator. Among other findings, the study reported the rectangular collimator system reduces radiation exposure at the periphery of the outline of the cylindrical collimator by approximately 98%.

Implications of Implementing the ALARA Principle and NCRP Guidelines: How They Affect Your X-ray Procedures

Wright, D. N., Inside Dentistry, Jan/Feb. Vol. 2, Iss. 1

The article lists six different ways a dental practice can comply with the National Council on Radiation Protection and Measurements guidelines for radiation protection, following the ALARA Principle. The author concludes that the easiest and most beneficial place to start would be by replacing circular cones with rectangular cones, a very effective way to reduce radiation exposure of patients and staff, and it also helps to produce more readable X-rays.

Dental X-rays and the Risk of Thyroid Cancer: A Case-Control Study

Memon, Godward, Williams, Siddique & Al-Saleh, Acta Oncologica, Jan/Feb. Vol. 2, Iss. 1

This article discusses the largest case-control study on the subject of dental radiography and its possible association with thyroid cancer as a source of multiple low dose radiation to the gland.

Radiation Safety in Dental Radiography

Kodak Dental Radiography Series

Although the general consensus of dental radiologists is the dosage from dental x-ray exposure is not harmful; the absence of conclusive proof that establishes the absence of risk means it must be assumed there is potential of some risk from diagnostic exposure. This article outlines application of the ALARA (As Low As Reasonably Achievable) principle. The same safety procedures that minimize exposure for both patient and operator can also increase the quality of the radiographic images.

Health Risks from Exposure to Low Levels of Ionizing Radiation

Beir VII, Report in Brief, June 2005

Although the general consensus of dental radiologists is the dosage from dental x-ray exposure is not harmful; the absence of conclusive proof that establishes the absence of risk means it must be assumed there is potential of some risk from diagnostic exposure. This article outlines application of the ALARA (As Low As Reasonably Achievable) principle. The same safety procedures that minimize exposure for both patient and operator can also increase the quality of the radiographic images.

Importance of Optimizing Collimation to Reduce Unnecessary Dose

Farman, A. G.

Letter discussing the benefits of using rectangular collimation as a means of reducing dental radiation dose and the chances of fatal cancer from dental radiography by at least 60%. Also, why the belief that use of digital solid state detectors alone results in substantial dental patient dose reduction is a misconception. Dr. Farman also outlines the specific benefits of Tru-Align for radiograph image quality, patients and dental practices utilizing the device.

NCRP Report No. 145: New Dental X-ray Guidelines: Their Potential Impact on Your Dental Practice

Dale A. Miles DDS, MS, and Robert P. Langlais DDS, MS, Dentistry Today, Sept 2004

“The purpose of this article is to summarize the newest dental x-ray guidelines from the National Council on Radiation
Protection and Measurements (NCRP) report No. 145, which was released in December 2003, and alert dentists to the
potential impact on their office radiographic procedures”

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