IADR Abstract Archives
Accuracy and Dimensional Stability of Interocclusal Recording Materials
Objectives: The aim of this laboratory study was to evaluate accuracy and dimensional stability of different interocclusal recording materials depending on the influencing factors disinfection medium and time as well as storage temperature and time.
Methods: Three conventional (FutarD, Kettenbach (FD), Ramitec, 3M (RT), Luxabite, DMG (LB)) and one scannable (FutarCut&Trim Fast, Kettenbach (FC)) interocclusal recording materials were investigated. One conventional material (LB) was tested with (C) or without relining with LB (NC). For each of these five groups, 120 interocclusal records were made using a custom-made apparatus. Three subgroups were created (n=40) with respect to storage temperature (5°C, 22°C, 55°C). Each subgroup was divided into 5 sub-subgroups (n=8) with respect to disinfection: Mucalgin (Merz, MU) for 10min, Mucalgin for 24h, MD520 (Dürr, MD) for 15min, MD520 for 24h and no disinfection (ND). Vertical discrepancies were measured after 48h using a precision dial gauge. The data were statistically analysed using 1-way analysis of variance (ANOVA) followed by Games-Howell test (p≤.05).
Results: After 48h, vertical discrepancies ranged from -29±11μm (FD, 22°C, MD-15min) to 584±12μm (LB-NC, 22°C, MU-10min). The subgroups showed smallest vertical discrepancies at 5°C for FC with 1±4μm (ND), at 22°C for FD with -2±5μm (MU-10min) and at 55°C for RT with 1±13μm (MD-15min). Whereas the greatest discrepancies at 5°C occurred for LB-NC with 581±10μm (MU-10min), at 22°C for LB-NC with 584±12μm (MU-10min) and at 55°C for LB-C with 559±38μm (MD-15min). At 55 °C LB-NC specimens could not be positioned back for measurement. Smallest vertical discrepancies concerning disinfection treatment occurred for ND with 1±4μm (FC, 5°C) followed by MD-15min with 1±13μm (RT,55°C) and MU-10min with 2±2μm (RT, 55°C).
Conclusions: All investigated factors influenced the vertical discrepancy of the tested interocclusal recording materials. A storage temperature of 55°C should be avoided when using LB. Additionally, LB should be used with relining.
Methods: Three conventional (FutarD, Kettenbach (FD), Ramitec, 3M (RT), Luxabite, DMG (LB)) and one scannable (FutarCut&Trim Fast, Kettenbach (FC)) interocclusal recording materials were investigated. One conventional material (LB) was tested with (C) or without relining with LB (NC). For each of these five groups, 120 interocclusal records were made using a custom-made apparatus. Three subgroups were created (n=40) with respect to storage temperature (5°C, 22°C, 55°C). Each subgroup was divided into 5 sub-subgroups (n=8) with respect to disinfection: Mucalgin (Merz, MU) for 10min, Mucalgin for 24h, MD520 (Dürr, MD) for 15min, MD520 for 24h and no disinfection (ND). Vertical discrepancies were measured after 48h using a precision dial gauge. The data were statistically analysed using 1-way analysis of variance (ANOVA) followed by Games-Howell test (p≤.05).
Results: After 48h, vertical discrepancies ranged from -29±11μm (FD, 22°C, MD-15min) to 584±12μm (LB-NC, 22°C, MU-10min). The subgroups showed smallest vertical discrepancies at 5°C for FC with 1±4μm (ND), at 22°C for FD with -2±5μm (MU-10min) and at 55°C for RT with 1±13μm (MD-15min). Whereas the greatest discrepancies at 5°C occurred for LB-NC with 581±10μm (MU-10min), at 22°C for LB-NC with 584±12μm (MU-10min) and at 55°C for LB-C with 559±38μm (MD-15min). At 55 °C LB-NC specimens could not be positioned back for measurement. Smallest vertical discrepancies concerning disinfection treatment occurred for ND with 1±4μm (FC, 5°C) followed by MD-15min with 1±13μm (RT,55°C) and MU-10min with 2±2μm (RT, 55°C).
Conclusions: All investigated factors influenced the vertical discrepancy of the tested interocclusal recording materials. A storage temperature of 55°C should be avoided when using LB. Additionally, LB should be used with relining.