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The effect of using different impression techniques and materials on vertical tissue displacement in free end extension ridges. (Dental survey and clinical study) | ||
| Journal of baghdad college of dentistry | ||
| Article 1, Volume 21, Issue 1, 2009, Pages 9-14 | ||
| Authors | ||
| Amir. M. Khamas; Rawia. N. AL- Dafaii | ||
| Abstract | ||
| ABSTRACTBackground: Various impression techniques used in the construction of free- end extension partial denture are basedon theories relative to the compressibility and behaviour of the soft tissue during impression making and duringfunction, the aim of the study was to measure vertical tissue displacement during impression making for free- andextension using different impression technique and materials.Material and methods: the study consisted of two parts (question are and clinical) the questionnaire was circulatedamong (90) dentists at different working places, to see which impression technique they use in free- and extension. Inthe clinical part (24) mandibular distal extension impression were made using three impression techniques andmaterials (special tray with alginate, special tray with polyether and double tray with zinc- oxide eugenol impressionpaste). The amount of vertical tissue displacement was measured on stone cast using (dial indicator dimension).Results: The results of the survey showed that (44%) of the dentist tend to use special tray with alginate, and (38.1%) ofprosthodontist use double tray impression, the clinical part showed that there was significant difference between theimpression techniques.Conclusions: The most popular impression technique used is special tray with alginate, which showed more tissuedisplacement in the clinical part of the study, while the double tray impression technique showed the leastdisplacement.Keyword: Tissue displacement, free- end extension, impression technique. J Bagh Coll Dentistry 2009; 21(1):9-14) | ||
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