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0.05). Conclusions: All tested groups showed acceptable marginal and internal gaps mean values. Butt joint design showed a better effect than shoulder finish line design on the marginal integrity and internal adaptation. Cerasmart showed a better effect than IPS e.max CAD on the internal adaptation.]]>
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3mm, bone loss >1mm, separation of the metal housing from the denture base, teeth fracture, overdenture fracture, and denture relinings did not significantly differ between groups. The 4-implant group showed significant higher pain, edema, peri-implant mucositis, teeth wear, and denture border adjustments than the two implant group. The 2-implant group showed significant higher abutment bending /fracture, O/ring wear/ distortion, and O/ring damage/replacement than the 4-implant group 2 mini-implants may be a suitable alternative to 4-mini-implants when used to retain mandibular overdentures as it was associated with reduced pain, edema, peri-implant mucositis, teeth wear, and denture border adjustments. However, 2-mini-implants are associated with increased prosthetic complications related to attachments as abutment bending /fracture, O/ring wear/ distortion, and O/ring damage/replacement.]]>
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0.05). EM group recorded significantly higher fracture resistance mean values (737.55±223.3N) than BC (434.33±100.8 N) group, (p < 0.05) as verified by unpaired t-test. The failure mode presented that (71.44%) of BC specimens exhibited favorable type and (28.57%) catastrophic failure. Whereas, EM group revealed (71.43%) catastrophic failure and (28.57%) favorable type. Chi square test (P < 0.05) displayed statistically significant difference between both groups. Conclusions: Brilliant Crios endocrowns showed better marginal adaptation and more favorable failure mode than those fabricated from E max CAD. E max endocrowns revealed higher fracture resistance than Brillient Crios.]]>
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0.05). Predominant failure mode was the mixed type as detected by Chi square test. SEM revealed absence of smear layer and opened dentinal tubules after (laser and EDTA) treatment. Conclusions: laser activated irrigation of root dentin significantly improved the bond strength of fiber post after endodontic retreatment with both sealers.]]>
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