Collimator with filtration compensator: clinical adaptation to meet European Union recommendation 4F on radiological protection for dental radiography

Baños, Miguel Alcaraz; García-Vera, MC; Bravo, León A.; Beneyto, Yolanda Martínez; Armero, D; Morant, J.J.; Canteras, Manuel

doi:10.1259/dmfr/15580890

Cited by 11 publications

(14 citation statements)

References 22 publications

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“…In this sense, cephalometric analysis can potentially suggest the structural evolution of the patient through the growth pattern analysis (26), but cannot provide prediction of growth rate or reveal a patient's current stage. For these reasons, the European directives on radiation protection consider this procedure as non-critical for the purposes of orthodontic diagnosis (27).…”

Section: Discussionmentioning

confidence: 99%

Oxidative Stress Status in the Saliva of Growing Subjects as a Potential Pubertal Biomarker

et al. 2012

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The aim of this study is to evaluate the oxidative stress in saliva during physical growth. A cohort of 30 volunteers (16 females and 14 males), 6-30 years of age, was enrolled in this study. The subjects Were randomly recruited from patients who were referred to the Dental Clinic of the University of L'Aquila for a regular checkup. Eachsubject's maturity level was assessed according to the Tanner scale and their saliva samples were collected by "spitting method". Thiobarbituric acid reactive substances (TBARS) and ferric ion reducing antioxidant power (FRAP) assays were assessed to evaluate lipid peroxidation -one of the major compounds of oxidative stress -and antioxidant power of saliva. The results show TBARS values increased from pre/early to mid-pubertal status, peaked at mid-pubertal status, and then decreased steadily thereafter. Meanwhile, no characteristic trends in the FRAP data in relation to Tanner stage were observed. Our findings suggest that the peak of peroxidation was found to coincide with the period of mid-puberty (pubertal peak -period with strongest growth). In conclusion, the present data provide a easy, non-invasive method for monitoring development staged in subjects receiving orthodontic therapy.

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Section: Discussionmentioning

confidence: 99%

Oxidative Stress Status in the Saliva of Growing Subjects as a Potential Pubertal Biomarker

et al. 2012

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“…It achieved more than 40% dose reduction when tested on a phantom head with inserted dosemeters (Figure 1). In 2009, Alcaraz et al 10 designed and tested a prototype of a wedge-shaped collimator that could be mounted on a specific combination panoramic–cephalometric imaging system. They found up to 60% dose reductions but concluded that the area below the mandible was not effectively shielded without individual modification of the collimator for each patient.…”

Section: Introductionmentioning

confidence: 99%

“…Without adjustment, there will either be too much shielding in patients with mandibles that grow or are located lower than average or not enough shielding for patients who have smaller or more superiorly located mandibles. 10 Finally, a wedge-shaped collimator may block imaging of the cervical vertebrae. Depiction of the cervical vertebrae has become desirable since the developmental stages of these vertebrae have been used as indices of skeletal maturation.…”

Section: Introductionmentioning

confidence: 99%

Anatomically shaped cranial collimation (ACC) for lateral cephalometric radiography: a technical report

Hoogeveen¹,

Stelt²,

Berkhout³

2014

Dentomaxillofacial Radiology

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Lateral cephalograms in orthodontic practice display an area cranial of the base of the skull that is not required for diagnostic evaluation. Attempts have been made to reduce the radiation dose to the patient using collimators combining the shielding of the areas above the base of the skull and below the mandible. These so-called “wedge-shaped” collimators have not become standard equipment in orthodontic offices, possibly because these collimators were not designed for today's combination panoramic–cephalometric imaging systems. It also may be that the anatomical variability of the area below the mandible makes this area unsuitable for standardized collimation. In addition, a wedge-shaped collimator shields the cervical vertebrae; therefore, assessment of skeletal maturation, which is based on the stage of development of the cervical vertebrae, cannot be performed. In this report, we describe our investigations into constructing a collimator to be attached to the cephalostat and shield the cranial area of the skull, while allowing the visualization of diagnostically relevant structures and markedly reducing the size of the irradiated area. The shape of the area shielded by this “anatomically shaped cranial collimator” (ACC) was based on mean measurements of cephalometric landmarks of 100 orthodontic patients. It appeared that this collimator reduced the area of irradiation by almost one-third without interfering with the imaging system or affecting the quality of the image. Further research is needed to validate the clinical efficacy of the collimator.

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“…1,2 The literature contains descriptions of a number of collimators that have been developed to comply with these guidelines. [3][4][5][6][7] Unfortunately, these collimators have not achieved wide acceptance in the orthodontic field. 8 This could be because the proposed collimators were designed for dedicated cephalometric X-ray installations but not for the currently used combined panoramic-cephalometric machines.…”

Section: Introductionmentioning

confidence: 99%

Validation of anatomically shaped cranial collimation (ACC) in orthodontic lateral cephalography

Hoogeveen

Guicherit²,

Gopie³

et al. 2014

Dentomaxillofacial Radiology

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Collimator with filtration compensator: clinical adaptation to meet European Union recommendation 4F on radiological protection for dental radiography

Abstract: A radiographic examination can be carried out with children using only a third of the dose normally used with no increase in the time or cost involved.

Cited by 11 publications

References 22 publications

Oxidative Stress Status in the Saliva of Growing Subjects as a Potential Pubertal Biomarker

Oxidative Stress Status in the Saliva of Growing Subjects as a Potential Pubertal Biomarker

Anatomically shaped cranial collimation (ACC) for lateral cephalometric radiography: a technical report

Validation of anatomically shaped cranial collimation (ACC) in orthodontic lateral cephalography

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