title: Accuracy of two stereolithographic surgical templates: a retrospective study.
abstract: BACKGROUND
  The use of computer software and stereolithography for dental implant therapy has significantly increased during the last few years. The aim of this study was to evaluate and compare the mean accuracy and maximum deviations values of dental implant placement using two stereolithographic (SLA) guide systems.
  
  
  METHODS
  Twenty patients were selected and 227 implants were inserted using bone-, tooth- and mucosa-supported SLA surgical guides. Thirty-one guides, both single- and multiple-type, were used. Some of the single-type surgical guides were fixed with osteosynthesis screws. A postoperative computer tomography (CT) was performed and an iterative closest point algorithm was used to match the jaw of the CT preoperative with the jaw of the postoperative CT. Quantitative data of each group were described. The t-test was used to determine the influence of the utilization of the different types of SLA on accuracy values.
  
  
  RESULTS
  t-Test demonstrated a better accuracy of the multiple-type guides in almost all deviation values when the mucosa-supported guides were considered. Regarding the bone-supported template, the single-type fixed group showed a better accuracy while the highest values of deviation were registered by the multiple-type guides. The single-type group showed a better accuracy when the tooth support was considered.
  
  
  CONCLUSIONS
  The results of the present study indicated best accuracy of the single-type guide using a bone or tooth support. The multiple-type guide recorded the best accuracy data when the mucosa support was considered comparing either a fixed and a not-fixed single-type guide.
authors: Department of Oral and Maxillofacial Sciences, School of Dentistry, Sapienza University of Rome, Rome, Italy. michele.cassetta@uniroma1.it
authors: Michele
authors: M
authors: Cassetta
authors: Matteo
authors: M
authors: Giansanti
authors: Alfonso
authors: A
authors: Di Mambro
authors: Sabrina
authors: S
authors: Calasso
authors: Ersilia
authors: E
authors: Barbato
mesh_terms: D017076:Computer-Aided Design / Q000706:statistics & numerical data*; D003758:Dental Implantation, Endosseous / Q000295:instrumentation* / Q000706:statistics & numerical data; D015921:Dental Implants / Q000706:statistics & numerical data*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000706:statistics & numerical data; D021621:Imaging, Three-Dimensional / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000295:instrumentation / Q000706:statistics & numerical data; D010347:Patient Care Planning / Q000706:statistics & numerical data; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted / Q000706:statistics & numerical data; D036542:Tomography, Spiral Computed / Q000706:statistics & numerical data; D014584:User-Computer Interface
chemical_list: D015921:Dental Implants