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Showing 5 results for Shokri
Radiographic evaluations of patients seeking removable prostheses treatment
M Bayanzadeh , Sh Shokri ,
Volume 16, Issue 4 (9 2004)
Abstract

Statement of Problem: Panoramic radiography seems necessary at examination, diagnosis and treatment plan phases of removable prostheses treatment since most of the patients who request removable prostheses treatment have retained root fragments, impacted teeth, cycts and tumors that might not otherwise be detected.
Purpose: The aim of the present study was to investigate the incidence rate of retained roots, impacted teeth and suspected pathologic conditions in panoramic radiographics of patients referred to removable prosthodontics departments of four dental schools and five public centers.
Materials and Methods: In this case series study, 1232 panoramic radiographs were analyzed to detect retained root fragments, impacted teeth and pathologic conditions.

Results: From among 850 panoramic radiographs of patients seeking complete denture, the incidence rates of impacted teeth, retained roots and pathologic lesions were 1.3%, 9.5% and 4.0% respectively.Also from 382 panoramic radiographs of removable partial denture patients the corresponding measures were 2.9%, 11% amd 0.1%.
Conclusion: Due to the significant and evident problems in residual ridge, as well as pathologic conditions of the remaining teeth structures and their supporting tissues as partial prosthesis base, the necessity for panoramic radiographics in edentolous and semi- edentulous patients is reemphasized.


Assessment and comparison of proximal segment changes following mandibular set-back through bilateral sagittal split ramus osteotomy and intraoral verticosagittal ramus osteotomy
H. Mahmood Hashemi , P. Shokri ,
Volume 20, Issue 4 (5 2008)
Abstract

Background and Aim: Proximal segment movements following different methods of ramus osteotomy is one of the undesired consequences of orthognathic surgery. Theoretically, it seems that intraoral verticosagittal ramus osteotomy can minimize the movement of proximal segment. In this study, changes in intergonial distance and ramus flaring angles were evaluated and compared in transverse plane after mandibular set back by two osteotomy techniques.

Materials and Methods: In this randomized clinical trial 20 patients with mandibular prognathism without any asymmetry were selected and divided into two groups of 10 each.One group was treated by bilateral sagittal split ramus osteotomy and the other by intraoral verticosagittal ramus osteotomy technique. Intergonial width and inner ramal angle in transverse plane were measured on radiographs before and 1 and 12 weeks post surgery . Data were analyzed using covariance test with P<0.05 as the level of significance.

Results: Changes of intergonial distance and interramal angle in each group were significant after 1 and 12 weeks after surgery. No statistically significant difference was observed between the two studied groups.

Conclusion: According to the results of this study, there is no difference between bilateral sagittal split and intraoral verticosagittal ramus osteotomy techniques regarding mandibular width and ramus flaring changes.


Comparison of radiation absorbed dose in target organs in maxillofacial imaging with panoramic, conventional linear tomography, cone beam computed tomography and computed tomography
M. Panjnoush, A. Shokri, M. Hosseini Pouya, M. Deevband,
Volume 22, Issue 3 (1 2009)
Abstract

Background and Aim: The objective of this study was to measure and compare the tissue absorbed dose in thyroid gland, salivary glands, eye and skin in maxillofacial imaging with panoramic, conventional linear tomography, cone beam computed tomography (CBCT) and computed tomography (CT).
Materials and Methods: Thermoluminescent dosimeters (TLD) were implanted in 14 sites of RANDO phantom to measure average tissue absorbed dose in thyroid gland, parotid glands, submandibular glands, sublingual gland, lenses and buccal skin. The Promax (PLANMECA, Helsinki, Finland) unit was selected for Panoramic, conventional linear tomography and cone beam computed tomography examinations and spiral Hispeed/Fxi (General Electric,USA) was selected for CT examination. The average tissue absorbed doses were used for the calculation of the equivalent and effective doses in each organ.
Results: The average absorbed dose for Panoramic ranged from 0.038 mGY (Buccal skin) to 0.308 mGY (submandibular gland), linear tomography ranged from 0.048 mGY (Lens) to 0.510 mGY (submandibular gland),CBCT ranged from 0.322 mGY (thyroid glad) to 1.144 mGY (Parotid gland) and in CT ranged from 2.495 mGY (sublingual gland) to 3.424 mGY (submandibular gland). Total effective dose in CBCT is 5 times greater than Panoramic and 4 times greater than linear tomography, and in CT, 30 and 22 times greater than Panoramic and linear tomography, respectively. Total effective dose in CT is 6 times greater than CBCT.
Conclusion: For obtaining 3-dimensional (3D) information in maxillofacial region, CBCT delivers the lower dose than CT, and should be preferred over a medical CT imaging. Furthermore, during maxillofacial imaging, salivary glands receive the highest dose of radiation.


Validation methods to measure the length of the teeth-canal: A methodological study
, Manoochehr Karami, Ghodrattollah Roshanaei, Abbas Shokri, Namdar Pasandi,
Volume 29, Issue 4 (1-2017)
Abstract

Background and Aims: Acurate measurements of variables are crucial in epidemiological studies. Therefore, even the best design cannot prevent bugs caused due to the lack of reliability and validity measurement in studies. The aim of this study is to determine the validity of teeth-canal measurement.

Materials and Methods: This methodological study used available data of patients referred to dental clinics at Hamadan University of Medical Sciences in Hamadan with sample size or 58 cases in 2012. In order to determine the reliability of measuring the length of canals and introduce the most appropriate measure met of the actual data, Bland-Altman plot and intraclass correlation coefficient (ICC) were used and finally compared.

Results: In this study, the mean ± SD of channel length in the apex locator Root ZX were 21.93 ± 2.28 mm and in X-ray PA were 22.4 ± 2.38 mm. ICC between the length of canals by the apex locator and radiographic in all teeth was 0.989. Bland-Altman plot showed that absolute agreement between the two methods of measurement.

Conclusion: The findings of this study ensure dental professionals that measuring the length of channels by PA method is more practical and easier and prove different approaches of the reliability and validity. However, we recommend using ICC and Bland Altman methods due to their informative nature and consideration of absolute agreement instead of consistency.


Assessment of oral health literacy among adults of the nomadic population
Hamid Gheibipour, Ali Ahmadi, Abolghsem Shokri,
Volume 32, Issue 3 (11-2019)
Abstract
Background and Aims: One of the most important determinants of health is Oral Health Literacy (OHL). The aim of this study was to investigate the OHL among nomadic population in Kouhrang city as pristine society.
Materials and Methods: This was a  cross -sectional descriptive study among 200 nomadic population aged 18-60 years of Kouhrang city in 2018. Data were collected using a questionnaire and face-to-face interview, sampling method was performed by randomized cluster. The questionnaire consisted of 17 questions in 4 sections of reading comprehension, listening, perception of number, and decision making. According to the number of questions, the questionnaire score was formed 0 to 17 and the nomadic populations were categorized into three groups with inadequate OHL (0-9), borderline OHL (10-11), and adequate OHL (912-17).
Results: The mean and standard deviation of the participants in this study was 35.49±12.00. The results showed that 7.00% of participants had sufficient OHL (12-17), 21.51% borderline (10-11), and 71.50% had inadequate OHL
(0-9). The mean and standard deviation of OHL score in general was 7.65±2.80, and the mean DMFT index was 8.03±5.64 (P<0.001).
Conclusion: The results of this study showed that the OHL score in the nomadic population was low, and also the mean DMFT index was very high. It is necessary to pay attention to the timely prevention and treatment of the teeth, as well as serious attention to the health education in this population.

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