الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
This study aimed to Clinical evaluation of using digital smile design (DSD) versus conventional smile design with wax-up technique to close maxillary median diastema (MMD) with ceramic veneers according to esthetic parameters of dentofacial analysis, occlusal analysis, and phonetic analysis. And, invitro evaluation of the asymmetry percentage before and after treatment with digital wax-up versus conventional wax-up to close the maxillary median diastema.
For the invivo part of the study, thirty-six patients with MMD were allocated for this study. Restorations with ceramic veneers were done using two different smile design techniques. The test group (n=18) used DSD. Control group (n=18) used conventional wax-up technique. Patients in all groups were returned to the clinic for a clinical follow-up examination at the intervals of immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at immediate postoperative at 1, 3, 6, 12 , and and and 18 months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated months and evaluated according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form. according to Esthetic parameters form.
For the For the For the For the For the For the For the For the invitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the studynvitro part of the study , an impression was made for fifteen patients with MMD other than those used in the invivo study and poured to have a cast. Each cast was duplicated twice (n=30) and they were divided into two groups. A test group (n=15) set of casts was used for digital waxing. A control group (n=15) set of casts was used for conventional waxing. To facilitate the digital analysis, the pretreatment and conventional waxing casts were scanned with a scanner. To fabricate digital waxing, each virtual tooth was fitted manually on the digital cast to obtain the ideal tooth arrangement, emergence profile, symmetry, and esthetics. The comparison of the asymmetry percentage of width to height ratio of the maxillary central incisors among the pretreatment casts, conventional waxing casts, and digital waxing casts was performed using the asymmetry percentage equation. A smaller asymmetry percentage means greater symmetry.
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At the Invivo study, it was found that Digital smile design had a better correcting effect of different esthetic parameters than conventional smile design with no significant difference (p>0.05) between the two groups among the intervals of this study. At the Invitro study, a smaller asymmetry ratio in the digital wax-up group was found which meant greater symmetry than it in conventional wax-up with no significant difference between the two groups (p>0.05). So, the null hypothesis was confirmed
from the esthetic view, digital smile design appears to be very promising because dental esthetics parameters could be preceded differently by augmenting the interaction between the patient, the lab, and the dentist, which was hard by manual planning and depending on artistic dental technician not always available. Actual symmetry was better following the digital smile design. In terms of tooth symmetry, proportions, and dimensions the digital and conventional smile designs are nearly similar.
There was no significant difference between digital and conventional smile designs in both invivo and invitro studies.