Open tray impression technique is most ideal for implants with diverging angles.

Open tray impression technique is most ideal for implants with diverging angles.

• A. Parallel
• B. Convergent
• C. Diverged angle (non-parallel)
• D. Angled 90 degrees

Answer: (C)

When implants aren’t parallel, capturing their exact positions in an impression becomes more challenging because any movement of the copings during removal can distort their true relationships. The open-tray impression technique addresses this by allowing the impression coping posts to extend through openings in the tray. After the material sets, you can unscrew the copings through those openings, so the coping remains attached to the impression itself. This direct pickup locks in the precise spatial relationships of all implants, even if their angles diverge, minimizing distortion that can occur when trying to remove a closed tray with non-parallel implants. In contrast, closed-tray methods rely on transferring the coping with a separate component inside the tray, which can introduce inaccuracies when implants are non-parallel because the transfer can bind or shift during seating and removal. While other scenarios like parallel or certain convergent setups may be managed with alternative techniques, the open-tray approach provides the most reliable capture of divergent implant angles by preserving the true orientation of each implant during the impression process.

When implants aren’t parallel, capturing their exact positions in an impression becomes more challenging because any movement of the copings during removal can distort their true relationships. The open-tray impression technique addresses this by allowing the impression coping posts to extend through openings in the tray. After the material sets, you can unscrew the copings through those openings, so the coping remains attached to the impression itself. This direct pickup locks in the precise spatial relationships of all implants, even if their angles diverge, minimizing distortion that can occur when trying to remove a closed tray with non-parallel implants.

In contrast, closed-tray methods rely on transferring the coping with a separate component inside the tray, which can introduce inaccuracies when implants are non-parallel because the transfer can bind or shift during seating and removal. While other scenarios like parallel or certain convergent setups may be managed with alternative techniques, the open-tray approach provides the most reliable capture of divergent implant angles by preserving the true orientation of each implant during the impression process.