12 February 2024 : Laboratory Research
Evaluation of the Milled and Three-Dimensional Digital Manufacturing, 10-Degree and 20-Degree Preparation Taper, Groove and Box Auxiliary Retentive Features, and Conventional and Resin-Based Provisional Cement Type on the Adhesive Failure Stress of 3 mm Short Provisional Crowns
Mohammed Sayed
1ABDEG*, Nandalur Kulashekar Reddy 1ABDEG, Naveen R. Reddy 1ABDEG, Khurshid A. Mattoo 1ACDEF, Yaser Ali Jad 2BCDEF, Abdullah Jaber Hakami 2BCDEF, Abdulwahab Khalid Hakami 2ABCDEFG, Abdulwahab M. Dighriri 2BCDEF, Salman Y. Hurubi 2BCDEF, Bassam Ali Hamdi 2BCDEF, Ahid Amer Alshahrani 3ACDEF, Ebrahim Fihaid Alsubaiy 4ACDEG, Abdullah Hasan Alshehri 4ACDEG, Mashael Abdullah AlNijaiban 5ACDEF
DOI: 10.12659/MSM.943237
Med Sci Monit 2024; 30:e943237
Table 4 Comparative differences in mean values showing the effect of various retentive features (taper, supplementary groove, and box) when used in 2 different provisional crown materials (milled/3D-printed) after cementing with 2 different provisional cements (conventional vs resin-modified non-eugenol).
| Feature | Groups | Mean | SD | Standard error | df | t value | P value | |
|---|---|---|---|---|---|---|---|---|
| Taper (Primary) | 10 degrees | Gp MC1 | 73.54 | 4.73 | 1.49 | 9 | 14.898 | <.0001 |
| Gp PC1 | 77.04 | 3.41 | 1.07 | |||||
| Gp MR1 | 137.26 | 10.45 | 3.304 | 9 | −6.938 | <.0001 | ||
| Gp PR1 | 184.85 | 19.00 | 6.01 | |||||
| 20 degrees | Gp MC2 | 48.05 | 5.03 | 1.59 | 9 | −0.145 | <.442 | |
| Gp PC2 | 48.40 | 5.64 | 1.78 | |||||
| Gp MR2 | 116.51 | 4.63 | 1.46 | 9 | −16.115 | <.0001 | ||
| Gp PR2 | 201.17 | 15.96 | 5.04 | |||||
| 10 degrees versus 20 degrees | Gp MC1 | 73.54 | 4.73 | 1.49 | 9 | 11.676 | <.0001 | |
| Gp MC2 | 48.05 | 5.03 | 1.59 | |||||
| Gp PC1 | 77.04 | 3.41 | 1.07 | 9 | 13.744 | <.0001 | ||
| Gp PC2 | 48.40 | 5.64 | 1.78 | |||||
| Gp MR1 | 137.26 | 10.45 | 3.304 | 9 | 5.741 | <.0001 | ||
| Gp MR2 | 116.51 | 4.63 | 1.46 | |||||
| Gp PR1 | 184.85 | 19.00 | 6.01 | 9 | −2.079 | <.026 | ||
| Gp PR2 | 201.17 | 15.96 | 5.04 | |||||
| Auxiliary | Groove | Gp MC2G | 47.68 | 2.97 | 2.842 | 9 | −3.035 | <.003 |
| Gp PC2G | 54.78 | 6.77 | 2.14 | |||||
| Gp MR2G | 104.20 | 8.99 | 2.84 | 9 | 21.445 | <.0001 | ||
| Gp PR2G | 277.23 | 23.88 | 7.55 | |||||
| Box | Gp MC2B | 48.97 | 2.20 | 2.99 | 9 | −9.374 | <.0001 | |
| Gp PC2B | 77.91 | 9.51 | 3.00 | |||||
| Gp PR2B | 328.84 | 36.87 | 11.6 | 9 | 17.031 | <.0001 | ||
| Gp MR2B | 123.85 | 9.46 | 2.99 | |||||
| Gp – groups or subgroups; SD – standard deviation; df – degree of freedom; t – ratio of difference in means; P – probability. Basis of Grouping – First alphabet represents type of provisional restoration [M – milled, P – printed (3D)], Second alphabet represents provisional cement type [C – conventional (TempBond NE), R – resin modified (ProviTemp NE)], third alphabet represents degree of taper [1 – 10 degrees, 2 – 20 degrees] and last alphabet represents additional retentive feature [G – buccal groove, B – mesial box]. | ||||||||