Absorbed Radiation Doses During Tomographic Examinations in Dental Implant Planning: A Study in Humans

Zenóbio, Élton Gonçalves; Zenóbio, Madelon Aparecida Fernandes; Nogueira, Maria do Socorro; Silva, Teógenes A.; Shibli, Jamil Awad

doi:10.1111/j.1708-8208.2010.00277.x

Cited by 6 publications

(7 citation statements)

References 10 publications

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“…The results for the right and left parotid may be considered to be similar to those presented in this paper. Zenobio et al (2012) observed maximum doses near the parotid glands at 1.57 mGy on the right and 1.89 mGy on the left in the panoramic exam, in a human study, and the maximum dose for spiral tomography was 4.41 mGy near the right and left parotid glands (15), which are very similar to our findings. Bou Serhal et al (2001) used a Cranex TOME with different exposure factors, and each examination consisted of 4 slices with a 2 mm slice thickness.…”

Section: Discussionsupporting

confidence: 81%

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Parotid-Absorbed Doses: A Comparison Between Spiral Tomography and Panoramic

Hekmatian¹,

Ghaffari²,

Toghyani³

et al. 2016

Avicenna J Dent Res

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Background: Jaws spiral tomography and panoramic radiography have wide applications in dentistry, and the parotid gland is one of the most sensitive organs of the head and neck. Objectives: The aim of this study was to evaluate and compare the parotid-absorbed dose in spiral tomography and panoramic radiographs using a thermoluminescent dosimeter. Materials and Methods: A radiation analog dosimetry phantom was placed in a Cranex Tome radiograph device, and a parotid absorbed dose was measured in both techniques. Thermoluminescent dosimeters were placed bilaterally in the parotid region (on the tube side and the opposite side). Spiral tomography dosimetry was done for the upper and lower jaws in the anterior and posterior regions. Each region contained four slices of 2 mm and four slices of 4 mm in thickness. The results were analyzed by a Wilcoxon test. Results: For the tube side parotid, the average absorbed doses in spiral tomography of the anterior and posterior parts of the maxilla and mandible, with the 2 mm slice thickness, were 1.70/1.40 and 1.65/1.60 mGy, respectively. The average absorbed doses with the 4mm slices were 1.65/1.70 and 1.75/1.57 mGy, respectively. For the opposite parotid, the average absorbed dose in spiral tomography of the anterior and posterior parts of the maxilla and mandible, with the 2 mm slice thickness, were 1.40/1.30 and 1.40/1.67 mGy, respectively. The average absorbed doses with the 4mm slices were 1.50/1.66 and 1.40/1.50 mGy, respectively. The average absorbed dose of the panoramic radiograph was 1.40 mGy. Conclusions: There was no statistically significant difference in the parotid absorbed dose between spiral tomography and a panoramic radiograph (P value = 0.18). The overall results of this study were similar to other studies.

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Section: Discussionsupporting

confidence: 81%

“…Indeed, the greatest individual organ doses for any examination are in the salivary tissue (9). Some previous studies have measured the absorbed doses of the radiosensitive organs of the head and neck during imaging modalities (10)(11)(12)(13)(14)(15)(16)(17).…”

Section: Introductionmentioning

confidence: 99%

Parotid-Absorbed Doses: A Comparison Between Spiral Tomography and Panoramic

Hekmatian¹,

Ghaffari²,

Toghyani³

et al. 2016

Avicenna J Dent Res

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“…The soft tissues of the pharynx and the bone of the cervical spinal column, including the bone marrow of the mandible are the next most sensitive to radiation. The lens of the eye and thyroid gland are at a much lesser risk . The parotid and submandibular glands lie mostly within the field of the DPT least required in this study, that is the posterior mandible and TMJ area.…”

Section: Discussionmentioning

confidence: 94%

“…The lens of the eye and thyroid gland are at a much lesser risk. [17][18][19][20] The parotid and submandibular glands lie mostly within the field of the DPT least required in this study, that is the posterior mandible and TMJ area. Therefore, by excluding these areas from the radiation exposure the required amount of information for diagnostic purposes may achieved in most situations with reduced risk to the patient.…”

Section: Discussionmentioning

confidence: 99%

Justification of full width panoramic radiography in Oral Surgery

et al. 2016

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Objective How much of a full width panoramic radiograph is required for diagnosis and treatment planning in Oral Surgery? Study design In this retrospective study, the panoramic radiograph was divided into five equal vertical segments and assessed as to the number of segments required for diagnosis and treatment planning in relation to their initial referral. Incidental findings outside the areas required were investigated as to whether or not they influenced treatment planning. Results From images of 823 patients; over half (56.5%) required only one segment of the image for diagnostic purposes in relation to their referral. The posterior mandible and temporomandibular joint areas were required least (5.3%), followed by the midline segment (10.0%). The segments required most often were the molar and premolar regions bilaterally (84.7%). In 15.8%, incidental findings were observed outside of the segments requested, but these only influenced treatment planning in 2.9% of cases. Conclusion In this study of patients attending an oral surgery service, a full width panoramic tomograph was not required in most instances. Referrals for segmental panoramic imaging should be regarded as regular rather than unusual practice.

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“…They used RANDO ® phantoms. so they opined that there was no significant increase in the dose at CBCT in multidimensional sialography Zenóbio EG et al (2012) (19) Brazil TLD-100 Measuring the dose of radiation in parotid gland, submandibular gland and thyroid gland in human patients selected for dental implant surgery. submandibular gland were most irradiated organs and next was thyroid.…”

Section: Osldmentioning

confidence: 99%

Impact of Diagnostic Radiation on Thyroid and Gonads - A Structured Review.

AlsuwatMohammed¹

2019

IJAR

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Objective: To know about the current state of knowledge in diagnostic radiation safety which is uppermost in mind of all the dental clinicians. Methods: A total of 301 references were reviewed using standard search engines Pubmed and Google. Twenty-two, were selected as relevant by all the authors, for our area of inquiry. The temporal status of these studies were from 2008 to 2017. Two categories of research was identified, those with anthropometric phantoms and those with real patients. Results: Initially we divided them into Phantom based studies (17) 77.27% and the patient-based studies were (5) 22.73%. There is paucity of actual patient studies due to noncooperation by patients for radiation-based study and also because of severe restriction by ethical committee to give permission for such study. Conclusion: The extensive Phantom based studies and specific patient studies of radiation measurement in diagnostic dental domain has suggested to a large extent that this is a safe mode of tool of treatment selection. The risks are very minimal and unnecessary radiography must be avoided and each radiographic session must be customized.

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Absorbed Radiation Doses During Tomographic Examinations in Dental Implant Planning: A Study in Humans

Cited by 6 publications

References 10 publications

Parotid-Absorbed Doses: A Comparison Between Spiral Tomography and Panoramic

Parotid-Absorbed Doses: A Comparison Between Spiral Tomography and Panoramic

Justification of full width panoramic radiography in Oral Surgery

Impact of Diagnostic Radiation on Thyroid and Gonads - A Structured Review.

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