The aim of this research project is emphasize the benefit of the digital workflow compared to conventional impressions and crown processing with standard la procedures. The objectives of the present study are to measure and compare the global cost, the time spent in the dental chair and in the lab and the fit of both digital and conventional workflow. Additionally, patient centered outcomes will be recorded.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
34
Each patient will go through both type of impression during single appointment: first the digital impression and then the conventional one (to avoid residual impression materials for the optical impressions). The time necessary for each procedure will be recorded.
Test and control implant crowns will be screw-retained on a multi-unit abutment. The conventional crown will be made of a Zirconia framework veneered with cosmetic ceramics directly screwed on the multi-unit platform (no titanium base). The experimental crown will be made in full zirconia and designed in the TRIOS software.
Fit of the crowns
To measure this parameter we will focus on interproximal fit and occlusion. Interproximal contact points will be checked with dental floss.
Time frame: 1 year
Time consumption at the dental chair
Numbers of appointment needed for each procedure will be counted and each one of them will be timed (from the unscrewing of the healing abutment until its replacement).
Time frame: 1 year
Time consumption in the lab
The time needed by the lab for manufacturing the crowns will be evaluated by timing all the different steps.
Time frame: 1 year
Global cost
Considering the time spent by the dentist and the lab technician, the cost of the optical impression system, of impression materials, of impression trays, of scan bodies and of impression copings, the final cost of each crown will be compared.
Time frame: 1 year
Esthetical aspect
A VAS evaluation of the esthetic properties (scoring from zero to ten each crown) will be achieved after the placement of each crown.
Time frame: 1 year
Patient centered outcomes
A questionnaire based on VAS scales will be given out and filled by the patients. Thus it will be possible to estimate which of both impressions is less unpleasant for them (questionnaire are in developement).
Time frame: 1 year
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