The Effect of Printing Layer Thickness on the Accuracy of Computer Aided Surgical Guides

Study Overview
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Brief Summary
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The purpose of this study is to evaluate the effect of printing layer thickness on accuracy of computer aided surgical guide

Detailed Description
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Computer aided surgical guide has many variables that affect its accuracy , in this study one variable is considered that may affect the accuracy of surgical guide which is printing of layer thickness of surgical guide whether 50 micron or 100 micron. computer aided surgical guide is constructed by imaging the patient pre-operative cone beam CT wearing scan appliance , then virtual implant placement on special soft ware ( Blue sky Bio ) and optical scanning of patient casts , afterword superimposition of the virtual implants on the scanned casts to design the surgical guide and printing on 3D printer ( Zenith 3D printer , Dentis , Korea ) with printing layer thickness 50 micron in first group and 100 micron in second group . Fixation of surgical guide in patient mouth and drilling of implant osteotomy through the guiding sleeves , post-operative Cone Beam CT with the same apparatus and setting as pre-operative scan . Finally, the pre-operative and post operative scans were then overlapped to measure linear and angular deviation of the virtually planned and actual implants position.

Official Title
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The Effect of Printing Layer Thickness on the Accuracy of Computer Aided Surgical Guides : A Randomized Clinical Trial

Conditions
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Guided Surgery

Intervention / Treatment
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* Device: computer aided surgical guide


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patients partially or totally edentulous arches . patients with Bucco-lingual bone thickness >6 mm allowing flapless implant placement patients free from any systemic diseases that may affect bone quality e.g diabetes . Exclusion Criteria: patients with thin ridges. patients with systemic disease that may affect bone quality. Patients with poor oral hygiene and active periodontal diseases. Anatomical situations requiring regenerative procedure.

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Supportive Care
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: 50 micron<br>surgical guide constructed with 3D printing with printing layer thickness 50 micron | Device: computer aided surgical guide<br>* comparing accuracy of surgical guide of printing layer thickness of 50 micron and 100 micron by superimposition of pre-operative and post-operative CBCT<br>* Other names: surgical guide;|
| Active Comparator: 100 micron<br>surgical guide constructed with 3D printing with printing layer thickness 100 micron | Device: computer aided surgical guide<br>* comparing accuracy of surgical guide of printing layer thickness of 50 micron and 100 micron by superimposition of pre-operative and post-operative CBCT<br>* Other names: surgical guide;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| accuracy of surgical guide |  | 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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computer aided design , dental implants , accuracy