Transference of virtual planning and planning over biomedical prototypes for dental implant placement using guided surgery.
OBJECTIVE
This study evaluated the transference of virtual planning and planning over biomedical prototypes for dental implant placement using guided surgery.


METHODS
This experiment was conducted with 11 identical replicas of a human edentulous mandible. For each mandible, models and surgical guides were manufactured using stereolithography. Simulated surgeries were performed on the prototypes. Following this, the implants were placed in the mandible replicas. Superposition of the tridimensional pre- and postoperative models was used for virtual evaluation. The real evaluation was conducted by linear measurements directly on the models.


RESULTS
The variations in angles and distances between the coronal, central and apical regions of the 22 implants evaluated in this study had mean values <1.45 degrees and 0.41 mm. The correlations between the positions of implant beds in each mandible were fair to very good, according to the distance analyzed and the interpretation guidelines used.


CONCLUSIONS
According to the results of this study, the variations found in the transference of dental implant positioning to the operative field, determined during virtual planning and obtained in surgeries simulated with biomedical prototypes, confirm the reliability of guided surgery techniques in implantology.
Viegas
Vinicius Nery
VN
Oral and Maxillofacial Surgery Department, School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil. vnviegas@ig.com.br
Dutra
Vinicius
V
Pagnoncelli
Rogério Miranda
RM
de Oliveira
Marília Gerhardt
MG
D003198:Computer Simulation; D003758:Dental Implantation, Endosseous / Q000379:methods*; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging; D008334:Mandible / Q000000981:diagnostic imaging; D008953:Models, Anatomic; D010347:Patient Care Planning; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed; D014584:User-Computer Interface