title: A comparison between videotaped and live demonstrations, for the teaching of removable partial denture procedures.
abstract: OBJECTIVE
  This study was devised to test the effectiveness of videotaped demonstrations as opposed to live demonstrations, to small groups of undergraduate dental students. The outcome was assessed by comparing the students' understanding of the clinical and laboratory technical stages of the altered cast impression technique, which is used in the construction of removable partial dentures.
  
  
  METHODS
  31 students watched a series of videotaped demonstrations and 30 received a similar series of live demonstrations. The altered cast procedure was divided into 5 distinct stages, each of which was assessed with the aid of agreed criteria, initially by the students and then by 2 staff assessors and these results were compared. The students were subsequently asked to rate how helpful the videotaped or live demonstration had been on a 5-point scale.
  
  
  RESULTS
  The live demonstration group showed better agreement between the students' assessment and the assessors' assessment of the quality of the work for the first part of the clinical stage. There was no difference in the groups' assessment of the final outcome of this clinical stage and the subsequent laboratory technical stages. Students who observed the live demonstrations indicated higher scores for its helpfulness in performance of all the stages of the technique, when compared to those who had observed a videotaped demonstration.
  
  
  CONCLUSIONS
  Both teaching methods developed a similar level of understanding of the principles behind the exercise, although the students preferred the live demonstrations. A carefully produced videotaped demonstration can be a useful alternative to a live demonstration in teaching the short and clear cut technique selected for this study.
authors.affiliation: Department of Prosthetic Dentistry, King's Dental Institute, King's College London, Caldecot Road, London SE5 9RW, UK.
authors.forename: M E
authors.initials: ME
authors.lastname: Packer
authors.forename: J O
authors.initials: JO
authors.lastname: Rogers
authors.forename: T J
authors.initials: TJ
authors.lastname: Coward
authors.forename: P S
authors.initials: PS
authors.lastname: Newman
authors.forename: R
authors.initials: R
authors.lastname: Wakeley
mesh_terms: D002858:Chromium Alloys; D002983:Clinical Competence; D003734:Dental Casting Investment; D003735:Dental Casting Technique; D003761:Dental Impression Technique; D003779:Denture Design; D003832:Denture, Partial, Removable; D004497:Education, Dental; D006801:Humans; D007754:Laboratories, Dental; D011476:Prosthodontics / Q000193:education; D011787:Quality of Health Care; D018709:Statistics, Nonparametric; D013335:Students, Dental; D013663:Teaching / Q000379:methods*; D013674:Technology, Dental / Q000193:education; D014743:Videotape Recording
chemical_list: D002858:Chromium Alloys; D003734:Dental Casting Investment