title: [PHYSICAL PROPERTIES OF PLASTER BANDAGES].
abstract: The physical properties of plaster bandages are a very important factor in achieving the basic functions of immobilization (maintaining bone fragments in the best possible position), which directly affects the speed and quality of fracture healing. This paper compares the differences between the physical properties of plaster bandages (mass, specific weight, drying rate, elasticity and strength) and records the differences in plaster modeling of fast bonding 10 cm wide plaster bandages, from three different manufacturers: Safix plus (Hartmann, Germany), Cellona (Lohman Rauscher, Austria) and Gipsan (Ivo Lola Ribar ltd., Croatia). Plaster tiles from ten layers of plaster, dimension 10 x 10 cm were made. The total number of tiles from each manufacturer was 48. The water temperature of 22 °C was used for the first 24 tiles and 34 'C was used for the remainder. The average specific weight of the original packaging was: Cellona (0.52 g/cm3), Gipsan (0.50 g/cm3), Safix plus (0.38 g/cm3). Three days after plaster tile modeling an average specific weight of the tiles was: Gipsan (1.15 g/cm3), Safix plus (1.00 g/cm3), Cellona (1.10 g/cm3). The average humidity of 50% for Safix plus and Cellona plaster tiles was recorded 18 hours after modeling, while for the Gipsan plaster tiles, this humidity value was seen after 48 hours. On the third day after plaster modeling the average humidity of the plaster tiles was 30% for Gipsan, 24% for Safix and 16% for Cellona. Cellona plaster tiles made with 34 °C water achieved the highest elasticity (11.75±3.18 MPa), and Gipsan plaster tiles made with 22 °C had the lowest (7.21±0.9 MPa). Cellona plaster tiles made with 34 °C water showed maximum material strength (4390±838 MPa), and Gipsan plaster tiles made with 22 °C water showed the lowest material strength (771±367 MPa). The rigidity and strength of Cellona and Gipsan plaster are higher in tiles made in warmer water, and for Safix plus are higher in tiles made in cooler water. All three types of plaster differentiate in physical properties. The differences in mass and specific weight before and after plaster modeling are minimal. There are greater differences in drying rate, elasticity and strength between the three different plaster materials.
authors.forename: Anko
authors.initials: A
authors.lastname: Antabak
authors.forename: Branimir
authors.initials: B
authors.lastname: Barisić
authors.forename: Matej
authors.initials: M
authors.lastname: Andabak
authors.forename: Lucija
authors.initials: L
authors.lastname: Bradić
authors.forename: Melita
authors.initials: M
authors.lastname: Brajcinović
authors.forename: Tatjana
authors.initials: T
authors.lastname: Haramina
authors.forename: Damir
authors.initials: D
authors.lastname: Haluzan
authors.forename: Nino
authors.initials: N
authors.lastname: Fuchs
authors.forename: Selena
authors.initials: S
authors.lastname: Durkovir
authors.forename: Selena
authors.initials: S
authors.lastname: Curković
authors.forename: Tomislav
authors.initials: T
authors.lastname: Luetić
authors.forename: Jerko
authors.initials: J
authors.lastname: Sisko
authors.forename: Ivica
authors.initials: I
authors.lastname: Prlić
mesh_terms: D001458:Bandages / Q000145:classification; D002133:Calcium Sulfate / Q000737:chemistry / Q000627:therapeutic use*; D017523:Croatia; D003890:Desiccation; D005858:Germany; D055595:Mechanical Phenomena
chemical_list: D002133:Calcium Sulfate