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Data acquisition of baseline and follow-up records

GB Gintare Burian
KE Kurt Erdelt
JS Josef Schweiger
CK Christine Keul
DE Daniel Edelhoff
JG Jan-Frederik Güth
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To acquire baseline and follow-up data, dental impressions with a polyether impressions material (Impregum Penta; 3 M, Seefeld, Germany) were taken after placement of restorations (baseline) and annual recall appointments (follow-up). Mean monitoring time in both groups was 350 ± 86 days (1st year), 755 ± 92 days (2nd year), 1102 ± 97 days (3rd year). All impressions were casted between 24 and 48 h with type 4 dental stone (Plurastone; Pluradent, Offenbach, Germany). Resulting plaster casts were digitalized with a laboratory scanner (D810; 3Shape, Copenhagen, Denmark) and exported to standard tessellation language (STL) file format.

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