title: The precision of computer-generated surgical splints.
abstract: OBJECTIVE
  The purpose of this study was to assess the precision of stereolithographic surgical splints generated by the authors' computer-aided design and manufacturing (CAD/CAM) technique by comparing them with the conventional acrylic splints.
  
  
  METHODS
  Seven volunteers were used. A pair of surgical splints, stereolithographic and conventional acrylic splints, was fabricated for each subject. A novel method was developed to quantify the airspace between the teeth and the splint. Conventional acrylic surgical splints served as a control group. The airspaces were recorded by impression materials and sliced cross-sectionally. Corresponding areas of the cross-sectional airspaces between stereolithographic and acrylic splints were measured and compared. Pearson's correlation coefficient and linear regression tests were performed.
  
  
  RESULTS
  Seven pairs of surgical splints were created. The areas of 98 pairs of cross-sectional airspaces were measured. The average difference between the conventional and the STL splints was 0.24 +/- 0.23 mm(2). The correlation coefficient (r) of the airspace areas between the stereolithographic and conventional acrylic splints was 1.00, and the regression coefficient (beta) was 1.03 (P <.01).
  
  
  CONCLUSIONS
  The results indicated that the stereolithographic splints, generated by the authors' CAD/CAM technique, had a high degree of accuracy. The fit of the STL splints was the same as the conventional surgical splints. In the future, traditional plaster dental model surgery will be replaced by computer-assisted surgical planning. The surgical splints will be made in the computer and the treatment plan will be directly transferred to the patient.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University of Texas Cleft and Craniofacial Clinic, The University of Texas Health Science Center, Houston, TX 77030, USA.
authors.forename: Jaime
authors.initials: J
authors.lastname: Gateno
authors.forename: James
authors.initials: J
authors.lastname: Xia
authors.forename: John F
authors.initials: JF
authors.lastname: Teichgraeber
authors.forename: Andrew
authors.initials: A
authors.lastname: Rosen
authors.forename: Bruce
authors.initials: B
authors.lastname: Hultgren
authors.forename: Tim
authors.initials: T
authors.lastname: Vadnais
mesh_terms: D000180:Acrylic Resins; D000704:Analysis of Variance; D017076:Computer-Aided Design; D003760:Dental Impression Materials / Q000737:chemistry; D004867:Equipment Design; D006801:Humans; D016014:Linear Models; D013165:Splints; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; D003760:Dental Impression Materials