Digital Impressions for Fabrication of Definitive “All-on-Four” Restorations
2015; Lippincott Williams & Wilkins; Volume: 24; Issue: 1 Linguagem: Inglês
10.1097/id.0000000000000206
ISSN1538-2982
AutoresEnrico Gherlone, Francesco Ferrini, Roberto Crespi, Giorgio Gastaldi, Paolo Capparè,
Tópico(s)Dental Radiography and Imaging
ResumoThe aim of this study was to assess the accuracy of digital impressions for "all-on-four" implant rehabilitation.Patients edentulous in one or both jaws were randomly selected for this study. Complete arch immediately loaded prostheses supported by 4 implants (2 axial and 2 tilted) were placed. Five hours after implant placement, screw-retained full-arch temporary prostheses were positioned. After 4 months, a digital scan body was used to finalize definitive prosthesis. Radiographic assessments were obtained immediately after surgery and at each follow-up visit. Bone level measurements were reported at 6 and 12 months, and bone loss between upright and tilted implants was compared.Fourteen definitive cast metal frameworks prosthesis were delivered to the patients. No implant dropout occurred. All prosthesis were screwed onto the dental implants, and x-ray examinations revealed a bar-implant connection accuracy. The implant survival rate was 100% for all positioned implants. No statistically significant differences (P > 0.05) in crestal bone loss between tilted and upright implants were detected.Digital impression creates an accurate physical model significantly improving efficiencies for the dental team and streamlining the workflow.
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