The value of imbibition and syneresis for dental impression on red seaweed: a laboratory experiment

Indahyani, Didin Erma; Barid, Izzata; Anggraeni, Priska Amelia

doi:10.24198/pjd.vol35no3.49071

Cited by 1 publication

(1 citation statement)

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“…This is particularly difficult to achieve in situations where the dental laboratory is not in the same facility as the dental practice. The low dimensional stability of alginate is produced by the phenomena of imbibition and syneresis [44,45]. Also, Peutzfeld et al observed that out of all the studied materials, alginate had the lowest accuracy [46].…”

Section: Discussion Regarding the Impression Techniquementioning

confidence: 99%

Conventional Dental Impressions vs. Impressions Reinforced with Rigid Mouthguards

Novac,

Tudor,

Pop

et al. 2024

Polymers

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The impression materials utilized today in dental medicine offer a good reproducibility and are easily accepted by patients. However, because they are polymer-based, they have issues regarding their dimensional stability. In this respect, the present work proposes a new type of dental impression, which is reinforced with rigid mouthguards. The aim of the study is to test the performances of such new impressions by comparing them to conventional ones—from this critical point of view, of the dimensional stability. Three types of polymeric materials were considered for both types of impressions: alginate, condensation silicone, and addition silicone. In order to obtain the new type of impressions, a manufacturing technique was developed, comprising the following phases: (i) conventional impressions were made; (ii) a plaster model was duplicated, and 15 rigid mouthguards were obtained; (iii) they were inserted in the impression technique, with each mouthguard positioned on the cast before the high-consistency material was inserted in the tray and the practitioner took the impression; (iv) the mouthguard remained in the tray and the low-viscosity material was inserted over the mouthguard; (v) the impression was positioned on the model, and after the material hardened, the mouthguard-reinforced impression was analyzed. In the evaluation of the dimensional stability, rigorous statistical analysis was essential to discern the performance differences between conventional and mouthguard-reinforced dental impressions. Statistical analyses employed non-parametric Mann–Whitney U tests because of the non-normal distribution of the data. They indicated a statistically significant improvement in the dimensional stability of addition silicone impressions when reinforced with mouthguards (p < 0.05), showcasing superior performance over conventional methods. Conversely, alginate and condensation silicone reinforced impressions did not exhibit the same level of stability improvement, suggesting the need for further optimization of these materials. In conclusion, from the three considered elastomers, addition silicone was found to be the prime candidate for high-precision dental impressions, with the potential to improve their quality from conventional impressions by utilizing the proposed reinforcing technique.

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Section: Discussion Regarding the Impression Techniquementioning

confidence: 99%