The effects of chemical sterilisation on the dimensional stability of some elastomeric impression materials

Salem, Nabil; Combe, E.C.

doi:10.1016/0267-6605(90)90046-x

Cited by 2 publications

(5 citation statements)

References 8 publications

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“…In T1 there were only statistically significant changes between the two materials in the control group, while the PE has a higher shrinkage than VPS. These results can be explained by the hydrophilic nature of PE [ 23 , 28 , 29 ]. Chen et al.…”

Section: Discussionmentioning

confidence: 99%

Dimensional stability of two impression materials after a 6-month storage period

Martins

Branco

Reis

et al. 2017

Acta Biomaterialia Odontologica Scandinavica

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Objective: Oral rehabilitation success is enhanced by an accurate and reproducible final impression. The purpose of this study is to evaluate the dimensional changes of a polyether and addition silicone subjected to disinfection and/or sterilization after a long storage period. Material and methods: Ninety samples were obtained from polyether ImpregumTM PentaTM (3M ESPETM, Seefeld, Germany) and 90 of addition silicone ImprintTM 4 PentaTM Putty (3M ESPETM, Seefeld, Germany) according to ISO 4823:2000. The samples of each material were split to form three groups with 30 samples each: a control group, a hypochlorite group (disinfection) and an autoclave group (sterilization). Samples were stored in the Portuguese Institute for Quality for six months at 23 °C. Samples were measured by laser interferometry, according to the Michelson technique before calculating dimensional stability according ISO 4823:2000. A statistical analysis via a three-way mixed ANOVA was performed. Results: Significant shrinkage of ImpregumTM PentaTM was 0.77 ± 0.17% in the control group, 0.42 ± 0.19% in the hypochlorite group and 0.52 ± 0.28% in the autoclave group. For ImprintTM 4 PentaTM Putty, the control group had a shrinkage of 0.42 ± 0.12%, the hypochlorite group 0.36 ± 0.09% and the autoclave group 0.59 ± 0.13%. Conclusions: The long-term storage of samples subjected to disinfection with 5.25% hypochlorite or autoclave sterilization can be used in a clinical setting as the dimensional changes are below the maximum permitted by the ISO 4823:2000, since there are no clinically significant changes in the dimension of the samples during the storage period.

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Section: Discussionmentioning

confidence: 99%

Dimensional stability of two impression materials after a 6-month storage period

Martins

Branco

Reis

et al. 2017

Acta Biomaterialia Odontologica Scandinavica

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“…For polyethers, the water absorption potential contributes to relatively big changes compared to dry controls (18, 23, 26, 30, 33, 37, 40), therefore spraying, which proved efficacious in eliminating micro‐organisms (29), as well as drying for 24 h after disinfection (32), have been advocated. Modern materials, however, seem to have overcome imbibition problems, and were found as stable as silicones (40, 48–50, 52, 57).…”

Section: Literature Reviewmentioning

confidence: 99%

“…Therefore, most authors conclude that, excluding the possibility of water uptake, interactions between impression material and disinfectant do not produce significant differences (28, 37, 40, 42, 48, 53) concerning the accuracy, either short‐ or long‐term, of the record. However, investigations using both dry and wet (water‐immersed) controls (18, 24, 30, 31, 34, 37, 48) indicate that chemical interactions may take place during disinfection.…”

Section: Literature Reviewmentioning

confidence: 99%

“…The imbibition characterizing the hydrocolloids imposed restrictions concerning time of immersion, with the majority of researchers applying disinfection times of no more than 30 min (22,28,35,36,38,40,42,45,51,52,54). According to Taylor et al (54), a 10-min imbibition can be beneficial, as it counteracts the syneresis-associated shrinkage.…”

Section: Assessment Of Published Evidence On Dimensional Accuracy ⁄ Smentioning

confidence: 99%

“…An additional search was subsequently performed to trace relevant studies cited in the retrieved material, as well as in dental materials’ textbooks; 13 more titles were found and obtained in full‐text. Thus, 41 original research studies, reporting on dimensional changes of chemically disinfected impression materials, were finally collected (17–57). These articles, represented by the first author’s name, arranged by year of publication and briefly described by the tested materials and main attributes of experimental design, are presented in Table 1.…”

Section: Introductionmentioning

confidence: 99%

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Accuracy and stability of impression materials subjected to chemical disinfection – a literature review

Kotsiomiti

Tzialla

Hatjivasiliou

2007

J of Oral Rehabilitation

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Disinfection of impressions by immersion or spraying with disinfecting solutions is considered nowadays mandatory for effective infection control. The purpose of this review was to examine existing evidence on the effects that chemical disinfection may have on critical qualities of impressions, namely dimensional accuracy and stability over time. A PubMed search was conducted to include original laboratory research articles written in English, published between 1980 and 2005 in peer-reviewed journals and investigating the effect of chemical disinfection, by immersion or spraying, on the dimensional changes that the impression materials experience after setting. Studies were also sought manually, by tracing the references cited in the retrieved articles. The reports on dimensional changes of disinfected impression materials, although rather numerous, are difficult to compare and analyze because of variations of the experimental design. The investigations broadly agree that the disinfection process does not generally affect the dimensional integrity of the impressions, in spite of the statistically significant differences occasionally found. However, the immersion in the disinfecting solution encourages water absorption phenomena in the case of the so-called hydrophilic impression materials, especially after the long-term immersion. Chemical interactions between impressions and disinfectants may occur, but they do not appear to influence the dimensional behaviour of the former. The overall effect of the disinfection is influenced not only by the changes experienced by the impression per se, but also by the alterations of the acrylic tray containing the impression and of the gypsum product poured in it.

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The effects of chemical sterilisation on the dimensional stability of some elastomeric impression materials

Cited by 2 publications

References 8 publications

Dimensional stability of two impression materials after a 6-month storage period

Dimensional stability of two impression materials after a 6-month storage period

Accuracy and stability of impression materials subjected to chemical disinfection – a literature review

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