Angulated screw channel restored with monolithic zirconia vs. porcelain-fused-to zirconia implant crowns: a prospective clinical trial in split-mouth design

doi:10.19438/j.cjoms.2021.03.007

Abstract

Abstract: PURPOSE: The objective of the present study was to compare the clinical performance of angulated screw channel restored with monolithic zirconia and porcelain-fused-to-zirconia implant crowns. MOTHODS: In a prospective, clinical, split-mouth trial, bilateral premolar or molar single gaps in 13 patients were restored with angulated screw channel with either monolithic (experimental group) or porcelain-fused-to-zirconia (control group). Patient's subjective evaluation, technical complications and crestal bone level change were recorded during a follow-up period of 12 months. SAS 9.4 software was used for statistical analysis. RESULTS: No implant was lost during the follow-up period. Of the crowns in esthetic appearance, there were 10 (excellent)/3(acceptable) in the experimental group and 12 (excellent)/1(acceptable) in the control group (P>0.05). Of the crowns in function, there were 12(excellent)/1(acceptable) in the experimental group and 11(excellent)/2(acceptable) in the control group (P>0.05). Changes in bone crest level seemed to have no correlation with either monolithic crowns or porcelain fused to zirconia crowns（P>0.05）. CONCLUSIONS: Within the limits of our study, over a 12-month follow-up, angulated screw channel restored with monolithic and porcelain-fused-to-zirconia implant crowns shows comparable clinical and radiological results.

Key words: Angulated screw channel, Dental implants, Posterior teeth, Restoration, Zirconia

CLC Number:

R783

YANG Lu-peng, FAN Lin-feng, SHI Jun-yu, ZHANG Xiao, GU Ying-xin, ZHANG Chu-nan. Angulated screw channel restored with monolithic zirconia vs. porcelain-fused-to zirconia implant crowns: a prospective clinical trial in split-mouth design[J]. China Journal of Oral and Maxillofacial Surgery, 2021, 19(3): 222-225.

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