IRIS publication 160750632
Effect of pre-heating on the viscosity and microhardness of a resin composite
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TY - JOUR - Lucey S, Lynch CD, Ray NJ, Burke FM, Hannigan A. - 2010 - January - Journal of Oral Rehabilitation - Effect of pre-heating on the viscosity and microhardness of a resin composite - Published - () - resin composite surface hardness viscosity pre-heating ease of placement hardness ratio PRE-HEATED COMPOSITE RHEOLOGICAL PROPERTIES IN-VITRO RESTORATIONS TEMPERATURE CURE POLYMERIZATION MICROLEAKAGE CONVERSION HARDNESS - 37 - 278 - 282 - The effect of pre-heating resin composite on pre-cured viscosity and post-cured surface hardness was evaluated. Groups of uncured specimens were heated to 60 degrees C and compared with control groups (24 degrees C) with respect to viscosity and surface hardness. Mean (SD) viscosities of the pre-heated specimens (n = 15) were in the range of 285 (13)-377 (11) (Pa) compared with 642 (35)-800 (23) (Pa) at ambient temperature. There was a statistically significant difference between the two groups (P < 0 center dot 001). Mean (SD) Vickers microhardness (VHN) of the pre-heated group (n = 15) was 68 center dot 6 (2 center dot 3) for the top surface and 68 center dot 7 (1 center dot 8) for the bottom surface measured at 24 h post curing (specimen thickness = 1 center dot 5 mm). The corresponding values for the room temperature group were 60 center dot 6 (1 center dot 4) and 59 center dot 0 (3 center dot 5). There was a statistically significant difference between corresponding measurements taken at the top and bottom for the pre-heated and room temperature groups (P < 0 center dot 001). There was no significant difference between top and bottom measurements within each group. Pre-heating resin composite reduces its pre-cured viscosity and enhances its subsequent surface hardness. These effects may translate as easier placement together with an increased degree of polymerization and depth-of-cure. - DOI 10.1111/j.1365-2842.2009.02045.x DA - 2010/01 ER -
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@article{V160750632, = {Lucey S, Lynch CD and Ray NJ, Burke FM and Hannigan A. }, = {2010}, = {January}, = {Journal of Oral Rehabilitation}, = {Effect of pre-heating on the viscosity and microhardness of a resin composite}, = {Published}, = {()}, = {resin composite surface hardness viscosity pre-heating ease of placement hardness ratio PRE-HEATED COMPOSITE RHEOLOGICAL PROPERTIES IN-VITRO RESTORATIONS TEMPERATURE CURE POLYMERIZATION MICROLEAKAGE CONVERSION HARDNESS}, = {37}, pages = {278--282}, = {{The effect of pre-heating resin composite on pre-cured viscosity and post-cured surface hardness was evaluated. Groups of uncured specimens were heated to 60 degrees C and compared with control groups (24 degrees C) with respect to viscosity and surface hardness. Mean (SD) viscosities of the pre-heated specimens (n = 15) were in the range of 285 (13)-377 (11) (Pa) compared with 642 (35)-800 (23) (Pa) at ambient temperature. There was a statistically significant difference between the two groups (P < 0 center dot 001). Mean (SD) Vickers microhardness (VHN) of the pre-heated group (n = 15) was 68 center dot 6 (2 center dot 3) for the top surface and 68 center dot 7 (1 center dot 8) for the bottom surface measured at 24 h post curing (specimen thickness = 1 center dot 5 mm). The corresponding values for the room temperature group were 60 center dot 6 (1 center dot 4) and 59 center dot 0 (3 center dot 5). There was a statistically significant difference between corresponding measurements taken at the top and bottom for the pre-heated and room temperature groups (P < 0 center dot 001). There was no significant difference between top and bottom measurements within each group. Pre-heating resin composite reduces its pre-cured viscosity and enhances its subsequent surface hardness. These effects may translate as easier placement together with an increased degree of polymerization and depth-of-cure.}}, = {DOI 10.1111/j.1365-2842.2009.02045.x}, source = {IRIS} }
Data as stored in IRIS
AUTHORS | Lucey S, Lynch CD, Ray NJ, Burke FM, Hannigan A. | ||
YEAR | 2010 | ||
MONTH | January | ||
JOURNAL_CODE | Journal of Oral Rehabilitation | ||
TITLE | Effect of pre-heating on the viscosity and microhardness of a resin composite | ||
STATUS | Published | ||
TIMES_CITED | () | ||
SEARCH_KEYWORD | resin composite surface hardness viscosity pre-heating ease of placement hardness ratio PRE-HEATED COMPOSITE RHEOLOGICAL PROPERTIES IN-VITRO RESTORATIONS TEMPERATURE CURE POLYMERIZATION MICROLEAKAGE CONVERSION HARDNESS | ||
VOLUME | 37 | ||
ISSUE | |||
START_PAGE | 278 | ||
END_PAGE | 282 | ||
ABSTRACT | The effect of pre-heating resin composite on pre-cured viscosity and post-cured surface hardness was evaluated. Groups of uncured specimens were heated to 60 degrees C and compared with control groups (24 degrees C) with respect to viscosity and surface hardness. Mean (SD) viscosities of the pre-heated specimens (n = 15) were in the range of 285 (13)-377 (11) (Pa) compared with 642 (35)-800 (23) (Pa) at ambient temperature. There was a statistically significant difference between the two groups (P < 0 center dot 001). Mean (SD) Vickers microhardness (VHN) of the pre-heated group (n = 15) was 68 center dot 6 (2 center dot 3) for the top surface and 68 center dot 7 (1 center dot 8) for the bottom surface measured at 24 h post curing (specimen thickness = 1 center dot 5 mm). The corresponding values for the room temperature group were 60 center dot 6 (1 center dot 4) and 59 center dot 0 (3 center dot 5). There was a statistically significant difference between corresponding measurements taken at the top and bottom for the pre-heated and room temperature groups (P < 0 center dot 001). There was no significant difference between top and bottom measurements within each group. Pre-heating resin composite reduces its pre-cured viscosity and enhances its subsequent surface hardness. These effects may translate as easier placement together with an increased degree of polymerization and depth-of-cure. | ||
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DOI_LINK | DOI 10.1111/j.1365-2842.2009.02045.x | ||
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