Reliability of implant placement with stereolithographic surgical guides generated from computed tomography: clinical data from 94 implants.
BACKGROUND
Dental implant placement requires precise planning with regard to anatomic limitations and restorative goals. The aim of this study was to evaluate the match between the positions and axes of the planned and placed implants using stereolithographic (SLA) surgical guides.


METHODS
Ninety-four implants were placed using SLA surgical guides generated from computed tomography (CT) between 2005 and 2006. Radiographic templates were used for all subjects during CT imaging. After obtaining three-dimensional CT images, each implant was virtually placed on the CT images. SLA surgical guides, fabricated using an SLA machine with a laser beam to polymerize the liquid photo-polymerized resin, were used during implant placement. A new CT scan was taken for each subject following implant placement. Special software was used to fuse the images of the planned and placed implants, and the locations and axes were compared.


RESULTS
Compared to the planned implants, the placed implants showed angular deviation of 4.9 degrees+/-2.36 degrees, whereas the mean linear deviation was 1.22+/-0.85 mm at the implant neck and 1.51+/-1 mm at the implant apex. Compared to the implant planning, the angular deviation and linear deviation at the neck and apex of the placed maxillary implants were 5.31 degrees+/-0.36 degrees, 1.04+/-0.56 mm, and 1.57+/-0.97 mm, respectively, whereas corresponding figures for placed mandibular implants were 4.44 degrees+/-0.31 degrees, 1.42+/-1.05 mm, and 1.44+/-1.03 mm, respectively.


CONCLUSIONS
SLA surgical guides using CT data may be reliable in implant placement and make flapless implant placement possible.
Ersoy
Ahmet Ersan
AE
Department of Prosthodontics, Faculty of Dentistry, Ankara University, Ankara, Turkey.
Turkyilmaz
Ilser
I
Ozan
Oguz
O
McGlumphy
Edwin A
EA
D000328:Adult; D000368:Aged; D017076:Computer-Aided Design; D003287:Contrast Media; D003758:Dental Implantation, Endosseous / Q000295:instrumentation* / Q000379:methods; D015921:Dental Implants; D019250:Dental Implants, Single-Tooth; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional / Q000379:methods; D007576:Jaw, Edentulous, Partially / Q000601:surgery; D007834:Lasers; D008297:Male; D008334:Mandible / Q000601:surgery; D008437:Maxilla / Q000601:surgery; D008875:Middle Aged; D009066:Mouth, Edentulous / Q000601:surgery; D010347:Patient Care Planning; D012984:Software; D036542:Tomography, Spiral Computed / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014584:User-Computer Interface
D003287:Contrast Media; D015921:Dental Implants