Evaluation of the Retention Force of Double Conical Crowns Used in Combination with a Galvanoforming and Casting Fabrication Technique

Abstract

The results of this study indicated that the use of different combinations of galvanoforming and casting techniques in the fabrication of conical crowns significantly affected retention force.

A Systematic Review Studying the Effect of Different Framework Materials on the Retention of Implant Telescopic Overdentures.

“…After initial titles and abstracts screening , 701 irrelevant articles were excluded and a total of 41 articles were selected for full-text screening, 2 additional articles were found through hand searching [4,5] . After full text screening, 15 articles [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] were included in the present analysis.…”

“…In cases where the primary crown is made of metal and the secondary crown is made of PEEK and it was proven that the secondary crown is the determinant of the retentive forces [15] . Whereas the hardness of 1ry crown (metal) (455.88 HV) is more than that of the 2ry crown (PEEK) (110 HV), therefore, the use of a hard and wear-resistant primary crown material against a less hard secondary crown material is advantageous.…”

“…Unfortunately, it is technically impossible to remove these casting beads from the surfaces of the cast crowns which apparently affect the retention by time [15] .…”

Comparison of Retention Forces of Different Fabrication Methods of Co-Cr Crowns: Pre-sintered and Milled, Cast and Electroforming Secondary Crowns with Different Taper Angles

“…15,17] and few complications [17], confirm the usage of Co-Cr alloy for RDPs. Especially double crown systems, consisting of a cemented primary crown on the abutment tooth and a precisely fitted secondary crown as the removable part [12,16] have been established [12] since reliable retention forces got verified [18]. Among other things, the retention forces are influenced by the taper angle as well as the fitting of the secondary crown [13].…”

“…While examining galvano-ceramic crowns, it was proven that they can be used alternatively to metal ceramic crowns [11]. Former studies, examining galvano-formed copings on RPDs, mentioned the differences of retention forces between galvano-forming and casting techniques [6,13,16,19,20].…”