Objective: To evaluate the marginal and internal suitability of temporary crowns of different materials made by direct or indirect methods.Methods: 40 patients with full crown restoration of the first molars in the outpatient department of Anhui Medical College from January 2021 to January 2022 were selected and divided into 4 group with 10 crowns each group.A stereo microscope was used to compare the differences in the edge and internal fit of the 4 sets of temporary crowns.Results: The average gap of temporary crowns made of different materials was 184.27-222.40 μm.The indirect CAD/CAM resin temporary crown set has the smallest margin and internal clearance, and it conforms to the normal distribution. The edge and internal clearance of the PMMA resin temporary crown made by the direct method were larger than that of the PMMA full crown made by the indirect method (P＜0.05). Conclusion: The indirect method CAD/CAM resin temporary crown has higher accuracy, followed by Protemp resin,the PMMA temporary crown prepared by the direct method has the maximum edge and internal clearance.
WU Yingyan
,
XU Nuo
,
NI Chengli
,
XU Xiaobo
. Evaluation on the marginal and internal adaptation of different provisional crown materials[J]. Journal of Baotou Medical College, 2023
, 39(6)
: 54
-57
.
DOI: 10.16833/j.cnki.jbmc.2023.06.011
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