الفهرس 
Patient satisfaction and crestal bone loss of polymer infiltrated ceramic network versus lithium disilicate implant hybrid abutment crowns in esthetic zone (Randomized Controlled Clinical Trial)
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Abstract
Methodology: A total of 44 patients were selected for this study. Then they were divided into
two groups (N=22). First group received vita enamic hybrid abutment crowns. Second group
received lithium silicate hybrid abutment crowns over immediately placed implants in esthetic
zone. Atraumatic extraction followed by immediate implant placement. The covering screw
was removed and replaced by a healing collar of proper size followed by temporization. The
intraoral scanning was performed immediately after removal of the temporary. The titanium
base was then secured to the implant and scan body. All the dental scans together with the
gingival scans were combined to create the entire virtual model of the restoration. The
restoration was milled, individualized and stained according to the manufacturer’s instructions.
Extraoral bonding of the titanium base with the abutment crown. Radiographs were taken
immediately after implant placement and 12 months after restoration placement using a parallel
technique, with an X-ray holder for periapical radiographs. The patients’ recorded their
satisfaction using visual analogue scale. Periodontal parameters were assessed after 1 year Results: Data were collected, tabulated, and statistically analyzed using Microsoft Excel ®
20161 , Statistical Package for Social Science (SPSS)® Ver. 242 . and Minitab3 ® statistical
software Ver. 16. The significant level was set at P ≤ 0.05. The quantitative data were presented
as mean & standard deviation. Exploration of the given data was performed using Shapiro-Wilk
test and Kolmogorov-Smirnov test for normality and revealed that all data were normal
(parametric). Accordingly, Repetitive One-Way ANOVA test was used to compare between
different follow up records. On the other hand, comparison between three groups was
performed by using One Way ANOVA test followed by Tukey`s Post Hoc test for multiple
comparisons