title: Utility of a Newly Designed Film Holder for Premolar Bitewing Radiography.
abstract: BACKGROUND
  Bitewing radiography is a valuable technique for assessment of proximal caries, alveolar crest and periodontal status. Technical errors during radiography result in erroneous radiographic interpretation, misdiagnosis, possible mistreatment or unnecessary exposure of patient for taking a repeat radiograph.
  
  
  OBJECTIVE
  In this study, we aimed to evaluate the efficacy of a film holder modified from the conventional one and compared it with that of conventional film holder.
  
  
  METHODS
  Our study population comprised of 70 patients who were referred to the Radiology Department for bilateral premolar bitewing radiographs as requested by their attending clinician. Bitewing radiographs in each patient were taken using the newly designed holder in one side and the conventional holder in the other side. The acceptability of the two holders from the perspectives of the technician and patients was determined using a 0-20 point scale. The frequency of overlap and film positioning errors was calculated for each method.
  
  
  RESULTS
  The conventional holder had greater acceptability among patients compared to the newly designed holder (mean score of 16.59 versus 13.37). From the technicians' point of view, the newly designed holder was superior to the conventional holder (mean score of 17.33 versus 16.44). The frequency of overlap was lower using the newly designed holder (p<0.001) and it allowed more accurate film positioning (p=0.005).
  
  
  CONCLUSIONS
  The newly designed holder may facilitate the process of radiography for technicians and may be associated with less frequency of radiographic errors compared to the conventional holder.
authors.affiliation: Assistant Professor, Department of Oral and Maxillofacial Radiology, Dental School, Shahid Beheshti University of Medical Sciences , Tehran, Iran .
authors.forename: Yaser
authors.initials: Y
authors.lastname: Safi
authors.affiliation: Department of Oral and Maxillofacial Surgery, Dental School, Shahidbeheshti University of Medical Sciences , Tehran, Iran .
authors.forename: Mohammad
authors.initials: M
authors.lastname: Esmaeelinejad
authors.affiliation: Assistant Professor, Department of Oral and Maxillofacial Radiology, Dental School, Shahid Beheshti University of Medical Sciences , Tehran, Iran .
authors.forename: Zahra
authors.initials: Z
authors.lastname: Vasegh
authors.affiliation: Assistant Professor, Department of Oral and Maxillofacial Radiology, Dental School, Shahid Beheshti University of Medical Sciences , Tehran, Iran .
authors.forename: Solmaz
authors.initials: S
authors.lastname: Valizadeh
authors.affiliation: Department of Oral and Maxillofacial Radiology, Dental School, Shahid Beheshti University of Medical Sciences , Tehran, Iran .
authors.forename: Mohammad Mehdi
authors.initials: MM
authors.lastname: Aghdasi
authors.affiliation: Dentist, Private Practice, Iran .
authors.forename: Omid
authors.initials: O
authors.lastname: Sarani
authors.affiliation: Assistant Professor, Department of Oral and Maxillofacial Radiology, Dental School, Kerman University of Medical Sciences , Kerman, Iran .
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Afsahi
keywords: Cheek; Digital radiography; Inter-proximal radiographs