Three-Dimensional Accuracy of Implant Placement Related to the Use of Guide Sleeves
Abstract
Since their introduction by Per-Ingvar Branemark, implant supported prostheses have provided expanded restorative options for dentists. Implants serve as the foundation for many restorative modalities including single-unit restorations, multi-unit fixed dental prostheses, hybrid dentures, and overdentures. Therefore, it is not surprising that an emphasis on improved accuracy exists. In nearly all dental implant applications, the placement of dental implants in mesio-distal, facial-lingual, and apical directions is critical to the success and long-term survivability of restorations. Surgical guides aid inaccuracy of implant placement by restricting drill movement to avoid erroneous angulation. However, one must not assume that surgical guides can be used without respect to the basic principles of implant placement. In recent years, computer-aided design (CAD) and computer-aided manufacturing (CAM) also has imparted a significant degree of accuracy to the fabrication of fully limiting surgical guides 4,5. After obtaining a three-dimensional image of the proposed surgical site via cone beam computed tomography (CBCT), the surgeon or restorative dentist can virtually plan implant placement using proprietary computer software programs. This information is also used to transfer the planned implant location to the surgical guide. After the surgical guide design is completed, the information is digitally transferred to a CAM unit where the guide can be fabricated via additive or subtractive manufacturing. Material jetting, specifically PolyJet (Stratasys Inc., Rehovot, Israel) is an example of additive manufacturing, where photo-sensitive resin is expressed in incremental layers, and subsequently polymerized using ultra-violet light. As a result of this intricate process, fully limiting implant guides allow for the least amount of error and highest degree of accuracy, as compared to conventionally produced guides.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 2020
- Accession Number
- AD1182856
Entities
People
- Melissa S. Thomas
Organizations
- Uniformed Services University of the Health Sciences