A Dental Blog With The Latest Dental News & Dental Technology For Your Dental Practice.
CAD/CAM implant crowns in a digital workflow: Five‐year follow‐up of a prospective clinical trial
Implant restorations became the first choice for single‐tooth replacement today.
The prospective clinical trial aims to investigate
computer‐aided‐design (CAD)/computer‐aided‐manufacturing (CAM)‐processed
implant crowns after 5 years of loading.
Materials and Methods
Twenty patients were included for cement‐retained crowns
in posterior sites. Radiographic analysis of bone levels was performed
after delivery and follow‐up. The Functional Implant Prosthodontic Score
(FIPS) was assessed at the final follow‐up. Wilcoxon signed‐rank tests
were used with a level of significance set at α = 0.05.
One implant was lost, resulting in a success rate of 95%
at 5 years. For 19 crowns, neither technical complications nor
biological complications were observed. The mean marginal bone level was
0.6 ± 0.26 mm (range: 0.18‐1.12) mesially, and 0.79 ± 0.36 mm (range:
0.23‐1.36) distally at 5 years. During the observation period, mean
radiographic bone levels increased significantly by 0.23 mm at mesial
and by 0.17 mm at distal sites (P < .0001) indicating minor
additional bone loss. The mean total FIPS score was 8.2 ± 1.0 (range:
7‐10) with the high score of 2.0 ± 0.0 for the variable “bone.”
CAD/CAM‐processed implant crowns demonstrated promising
radiographic and clinical outcomes after 5 years in function. Future
large‐scale trials are crucial to confirm these initial results in the
field of digital implant processing.