Voice Activation vs Hand Pointing for Mode Switching in VR Dental Implant Planning

Overview

This study compared voice commands and hand pointing for mode and tool changes in a VR-based dental implant planning system. Radiologists found both interaction methods useful, with voice commands enhancing efficiency by freeing hands and reducing physical movement, while hand pointing remained a reliable backup.

Background

Dental implant placement requires precise planning to avoid complications such as nerve injury and hemorrhage. Traditional implant planning uses 2D displays of CBCT images, but VR offers a 3D environment allowing free manipulation of anatomical models. Interaction methods in VR must be optimized; voice commands are promising as they free the user's hands and eyes, potentially improving workflow during implant planning.

Data Highlights

Six radiologists participated, with four having prior VR implant planning experience. Each performed three implant plans under two conditions: Hand (menu selection via controller pointing and button press) and Voice (mode/tool selection via voice commands with button presses as backup). The system included 15 modes and tools selectable by voice or hand. Subjective evaluations favored using both methods in parallel for optimal efficiency and natural interaction.

Key Findings

• Participants appreciated the VR implant planning system and were willing to integrate it into daily routines.
• Voice commands allowed efficient mode and tool changes without needing to turn or look away from the task.
• Hand pointing provided precise control and served as a reliable backup when voice recognition failed.
• Combining voice and hand input modalities was recommended to leverage the advantages of both.
• Simple, uniquely defined voice commands ensured reliable recognition and user confidence.
• Voice interaction reduced physical movement and cognitive load compared to hand-only input.

Clinical Implications

Incorporating voice commands alongside traditional hand pointing in VR dental implant planning can enhance user efficiency and comfort. Voice activation frees the clinician’s hands for other tasks and minimizes unnecessary physical movement, potentially improving workflow and reducing fatigue during complex planning procedures.

Conclusion

Voice commands are a valuable addition to VR dental implant planning interfaces, complementing hand pointing to create a more natural and efficient user experience. Their combined use supports precise and ergonomic implant planning in a 3D virtual environment.

References

1. Sutherland 1968 -- The Ultimate Display
2. Wang et al. -- Space Fixed Menus in VR
3. Bolt et al. -- Put That There System
4. Various Authors -- Complications in Dental Implant Surgery