A comparative evaluation of dimensional stability of three types of interocclusal recording materials-an in-vitro multi-centre study
The introduction of different interocclusal recording materials has put clinicians in dilemma that which material should be used in routine clinical practice for precise recording and transferring of accurate existing occlusal records for articulation of patient’s diagnostic or working casts in the fabrication of good satisfactory prosthesis. In the era of developing world of dentistry the different materials are introduced for interocclusal record with different brand names because of this; the utility of the material is confusing for successful delivery of prosthesis with lack of in vitro or in vivo studies which will predict the property of the material with utility recommendations.
Purpose of the study
The aim of this multicenter research is to evaluate the time dependent linear dimensional stability of three types of interocclusal recording materials; which gives very clear idea to clinicians in regard to its usage in routine practice and recommendations for usage of the different materials. Also to find out ideal time for articulation of three types of interocclusal recording materials with accuracy.
Materials and method
Commercially available and ADA approved Polyether bite registration paste (Ramitec), Poly vinyl siloxane bite registration paste (Jetbite) and Zinc oxide eugenol (ZOE) bite registration paste (Super bite) were used in the study.
A stainless steel die was made according to modified American dental Associations (ADA) specification no. 19. Each one of the tested materials were manipulated according to manufacturers’ instructions. The materials separated from die, 3-mins after their respective setting time, resulted in disks of standard diameter. Two parallel lines and three perpendicular lines reproduced on the surface. The distance between two parallel lines was measured at different time intervals i.e. 1 hour, 24, 48 and 72 hours by using travelling microscope (magnus) and compared with standard die measurements made according to ADA specification no.19 to find out the dimensional stability of these interocclusal recording materials. Total 120 samples were made for observation and results were subjected to statistical analysis. Statistical analysis was performed using analysis of variance (ANOVA) and then Tukey’s Honestly Significant Difference (HSD) test for comparison among groups at the 0.05 level of significance. After statistical analysis of the data, results were obtained and analyzed for interpretation.
The results shows significant difference between the dimensional stability of all three material at different intervals with p-value <0.05. Comparatively the polyether bite registration material showed less distortion with good dimensional stability compared to Poly vinyl siloxane bite (Jetbite), Zinc oxide eugenol(ZOE) bite (Super bite) at 1 hour, 24, 48, and 72 hours.
The dimensional stability decreased with increase in time and is influenced by both material factor and time factor. Polyether was found to be more dimensionally stable interocclusal recording material, which was followed by Silicone and Zinc oxide eugenol (ZOE). The dimensional stability of Polyether was good. Zinc oxide eugenol is dimensionally more unstable when compared with polyether and polyvinyl siloxane. We recommend that the polyether interocclusal records must be articulated within 48 hours and Polyvinylsiloxane interocclusal records must be articulated within 24 hours and the ZOE should be articulated within 1 hour to get a correct restoration to have very minimum distortion and maximum satisfaction without failure of prosthesis.
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- A comparative evaluation of dimensional stability of three types of interocclusal recording materials-an in-vitro multi-centre study
- Open Access
- Available under Open Access This content is freely available online to anyone, anywhere at any time.
Head & Face Medicine
- Online Date
- October 2012
- Online ISSN
- BioMed Central
- Additional Links
- Polyether bite
- Poly vinyl siloxane bite
- Zinc oxide eugenol (ZOE) bite
- Dimensional stability
- Interocclusal records
- Author Affiliations
- 1. Principal Gandhi Dental College, Bubaneswar, India
- 2. Department of Conservative and Endodontics, Saraswati Dhanwantari Dental College and Hospital, Parbhani, (MS), 431401, India
- 3. Department of oral and maxillofacial Surgery, Saraswati Dhanwantari Dental College and Hospital, Parbhani, Pathri road, NH222, Parbhani, Maharashtra, India
- 7. Department of oral and maxillofacial Surgery, Saraswati Dhanwantari Dental College and Hospital, Parbhani, Pathri road, NH222, Parbhani, Maharashtra, India
- 4. Department of Conservative and Endodontics, Gurunanak institute of dental science & research, Panihati, Kolkata, 114, India
- 5. Department of Prosthodontics, SVS Institute of Dental Sciences, Mahaboobnagar, AP, India
- 6. Department of Prosthodontics, Saraswati Dhanwantari Dental College and Hospital, Parbhani, Pathri road, NH222, Parbhani, Maharashtra, India