Surface detail reproduction and dimensional accuracy of stone models: influence of disinfectant solutions and alginate impression materials

Abstract

This study compared the surface detail reproduction and dimensional accuracy of stone models obtained from molds disinfected with 2% sodium hypochlorite, 2% chlorhexidine digluconate or 0.2% peracetic acid to models produced using molds which were not disinfected, with 3 alginate materials (Cavex ColorChange, Hydrogum 5 and Jeltrate Plus). The molds were prepared over matrix containing 20-, 50-, and 75-µm lines, performed under pressure with perforated metal tray. The molds were removed following gelation and either disinfected (using one of the solutions by spraying followed by storage in closed jars for 15 min) or not disinfected. The samples were divided into 12 groups (n=5). Molds were filled with dental gypsum Durone IV and 1 h after the start of the stone mixing the models were separated from the tray. Surface detail reproduction and dimensional accuracy were evaluated using optical microscopy on the 50-µm line with 25 mm in length, in accordance with the ISO 1563 standard. The dimensional accuracy results (%) were subjected to ANOVA. The 50 µm-line was completely reproduced by all alginate impression materials regardless of the disinfection procedure. There was no statistically significant difference in the mean values of dimensional accuracy in combinations between disinfectant procedure and alginate impression material (p=0.2130) or for independent factors. The disinfectant solutions and alginate materials used in this study are no factors of choice regarding the surface detail reproduction and dimensional accuracy of stone models.

Dimensional Stability of Alginates Molds Tridimentionally Scanned

“…14 Alginate is an irreversible hydrocolloid because of its chemical reaction, i.e., a powder that upon being mixed with water goes from the solid state to the gel state. 10,[15][16][17] It provides reproduction of sufficient details to make it suitable for routine use in Dentistry. In Orthodontics is used for both diagnostic models and work models for preparation of appliances for therapeutic purposes.…”

Influence of different water types on the physical and mechanical properties of gypsum

“…In a previous study 15 it was evaluated the dimensional accuracy of gypsum models (Durone IV) obtained from molds of three alginate impression materials that were disinfected by spraying and storage for 15 min, with three solutions (2% sodium hypochlorite, 2% chlorhexidine digluconate and 0.2% peracetic acid). There was no statistically significant difference between the disinfectant solutions and the alginate impression materials combination or for independent factors in the dimensional change of gypsum models.…”

Proteti̇k Di̇ş Tedavi̇si̇nde Dezenfeksi̇yon Ve Steri̇li̇zasyon

“…36 Dezenfeksiyon iĢlemlerinin irreversible hidrokolloid ölçü materyalinin yapısal özelliklerine etkisinin değerlendirildiği bir çalıĢmada üç farklı marka aljinat materyali (Cavex ColorChange, Hydrogum 5 ve Jeltrate Plus) üç farklı kimyasal solüsyonla (%2 sodyum hipoklorit, %2 klorheksidin glukonat ve %0.2 perasetik asit) spreyleme yöntemiyle dezenfekte edilmiĢ, bu dezenfeksiyon yöntemlerinin hacimsel stabilite ve yüzey netliği üzerine bir etkisi olmadığı bildirilmiĢtir. 37 Dezenfektan ajanla spreylendikten sonra 3 saat bekletilmiĢ ölçülerdeki hacimsel değiĢikliğin incelendiği bir çalıĢmada üç farklı marka irreversible hidrokolloid materyali, sodyum hipoklorit ve glutaraldehit solüs-yonlarıyla dezenfekte edilmiĢ ve elde edilen modeller incelenmiĢtir. Dezenfekte edilmemiĢ ve edilmiĢ modeller arası hacimsel değiĢiklik 24 μm'den az olarak bulunmuĢtur.…”