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Clinical factors and clinical variation influencing the reproducibility of interocclusal recording methods
Linköping University, The Institute of Technology. Linköping University, Department of Mathematics, Mathematical Statistics .
Karolinska Inst, Dept Dent Biomat Sci, Huddinge, Sweden Linkoping Univ, Dept Math, S-58183 Linkoping, Sweden.
Karolinska Inst, Dept Dent Biomat Sci, Huddinge, Sweden Linkoping Univ, Dept Math, S-58183 Linkoping, Sweden.
2002 (English)In: British Dental Journal, ISSN 0007-0610, E-ISSN 1476-5373, Vol. 192, no 7, 395-400 p.Article in journal (Refereed) Published
Abstract [en]

Objective The reproducibility of clinical records of the occlusion was assessed in three dimensions using mounted casts. Three distinct areas were examined: 1) mandibular positions (intercuspal position (IP) or retruded contact position (RCP)), 2) materials used in recording the occlusion, 3) clinical variation. Design Interocclusal records were made in a random order of three patients: one fixed prosthodontics case, one removable partial denture case and one complete denture case, with two different types of waxes, record rims, two different brands of vinyl polysiloxanes and one irreversible hydrocolloid. Setting Private practice and Karolinska Institute, Huddinge, Sweden, Subjects One general dental practitioner and three voluntary patients. Results Point estimation of variance components indicate that 70-93% of the variation of the positions of the mounted casts are caused by: 1) clinical variation for all three cases and in three directions, 2) the influence of recording materials 0-29%, and 3) mandibular positions (IP/RCP) 0-11%. The ranges of the positions of the mounted casts were lower for the dentate case (0.04-1.39 mm) than for the partially dentate case (0.17-2.65 mm), which in turn was lower than those for the edentulous case (1.42-5.59 mm). Conclusion Clinical variation seems to dominate the variation in positions of mounting casts when making interocclusal records, rather than mandibular position or the recording materials used. Therefore a dentist who makes one single interocclusal record cannot presume that it will reproduce the interocclusal relationship intended, which in the present study was most obvious for the edentulous case. The results showed that impression materials stabilised by a tray did not differ significantly from waxes and record rims concerning the reproducibility. Therefore the stabilised impression materials are an alternative, which also give additional advantages like reduction of appointments as well as superior accuracy.

Place, publisher, year, edition, pages
2002. Vol. 192, no 7, 395-400 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-48719OAI: oai:DiVA.org:liu-48719DiVA: diva2:269615
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Eriksson, Annika

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