Digital protocol for reference-based guided surgery and immediate loading: a prospective clinical study.
OBJECTIVE
To evaluate the performance of a computer-aided three-dimensional planning protocol in combination with previously inserted reference mini-implants and CAD/CAM technology to restore completely edentulous patients. The study evaluated implant and superstructure survival in a prospective clinical trial.


METHODS
The plan protocol called for treatment of 35 patients who were edentulous in either arch. Mini implants were used to establish a platform for computed tomography and fixation of the surgical template. The planning software based on three-dimensional simulation was used to plan ideal implant placement, digitally integrating the future prosthetic and anatomical situations to design the definitive superstructure.


RESULTS
A total of 35 patients, 20 with edentulous maxillae, 10 with edentulous mandibles, and 5 patients with edentulism in both arches were treated. All patients received definitive prostheses on the day of surgery. The majority of patients treated in maxilla underwent a sinus graft procedure to achieve sufficient bone to place implants. A total of 40 superstructures were inserted and immediately loaded. Of the 240 inserted implants, 229 (95.4%) survived, with 146 (93.6%) and 83 (98.8%) implants in the maxillary and mandibular arches, respectively. Of the 10 implants that failed in the maxilla, 9 occurred in patients with an augmented sinus. All definitive restorations demonstrated clinically acceptable fit.


CONCLUSIONS
When evaluating implant and superstructure survival, reference-based guided surgery seems to be a reliable treatment option for edentulous patients. The CAD/CAM superstructure, inserted and loaded immediately after guided implant insertion, demonstrated acceptable fit to the underlying implants.
University of Amsterdam School of Dentistry, ACTA, Amsterdam, The Netherlands. ali@tahmaseb.eu
Ali
A
Tahmaseb
Renaat
R
De Clerck
Irene
I
Aartman
Daniel
D
Wismeijer
D000328:Adult; D017076:Computer-Aided Design; D015921:Dental Implants; D017267:Dental Prosthesis Design / Q000379:methods; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D057893:Immediate Dental Implant Loading / Q000379:methods / Q000592:standards*; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008334:Mandible; D008437:Maxilla; D009066:Mouth, Edentulous / Q000000981:diagnostic imaging / Q000601:surgery; D011446:Prospective Studies; D011859:Radiography; D059546:Sinus Floor Augmentation; D025321:Surgery, Computer-Assisted / Q000592:standards*
D015921:Dental Implants