All-On-4 VDO Jig for Accurate Occlusion Recording
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Solution Overview
Problem
Current methods for recording and restoring the vertical dimension of occlusion (VDO) in All-On-4 prosthodontic procedures face challenges due to facial swelling and bodily fluid interference, making it difficult to accurately replicate the pre-surgical VDO during dental implant and denture placement.
Innovation Solution
The development of an All-On-4 vertical dimension of occlusion (VDO) jig that establishes and adjusts the VDO by placing fixed points between arches, using a vertical support column, lateral arm support bases, and temporary anchorage device (TAD) gantries to record and adjust VDO information, allowing for precise replication and adjustment during denture prosthetic creation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods (wax rims, stickers) are used to record VDO, then the process is simple, but accuracy is compromised due to facial swelling and bodily fluid interference
Solution Approach 1:
The VDO jig records the vertical dimension of occlusion and fixed points immediately before tooth extraction, when the patient's anatomy is still intact and unaffected by surgical changes. This preliminary recording captures accurate VDO information before facial swelling and tissue changes occur, eliminating the interference problem that plagues post-surgical measurement attempts
Solution Approach 2:
The VDO jig serves as an intermediary device that transfers and preserves VDO information from the pre-surgical state to the post-surgical reconstruction phase. Instead of attempting to measure VDO directly on the swollen, fluid-affected surgical site, the jig captures the dimensional data when conditions are optimal and maintains it through the surgical process
2Measurement precision
If VDO is recorded before tooth extraction, then accuracy is maintained, but the device complexity increases with the VDO jig structure
Solution Approach 1:
The VDO jig performs multiple functions: it records the vertical dimension of occlusion, establishes fixed points for anatomical reference, and provides a framework for transferring these measurements to the denture fabrication process. By consolidating these functions into a single device, the complexity is justified by the elimination of multiple separate measurement tools and procedures
Solution Approach 2:
The jig is designed to be applied and measurements to be taken in the pre-surgical phase when the patient's anatomy is stable and accessible. This preliminary action allows complex measurements to be performed under optimal conditions, avoiding the need for simplified but less accurate post-surgical measurement methods
3Loss of information
If fixed points are placed between arches using the VDO jig, then VDO information is accurately recorded, but the procedure time increases
Solution Approach 1:
The VDO jig and fixed points are installed immediately before tooth extraction, capturing all VDO information in a single pre-surgical step. This eliminates the need for multiple return visits to measure and verify VDO after surgery, when facial swelling and tissue changes would complicate the process and require additional corrective adjustments
Solution Approach 2:
The fixed points placed by the VDO jig provide permanent anatomical references that can be verified throughout the surgical and prosthetic process. These feedback markers ensure that the recorded VDO information remains accurate and can be cross-checked during denture fabrication, reducing the need for time-consuming trial and error adjustments
4Adaptability or versatility
If VDO is adjusted during denture creation, then adaptability is improved, but manufacturing precision may be compromised
Solution Approach 1:
The VDO jig establishes the correct vertical dimension of occlusion and fixed points before denture fabrication begins. By setting these parameters in advance on the patient's actual anatomy, the foundation for denture construction is already precisely determined, allowing laboratory technicians to focus on fabrication rather than measurement and adjustment
Solution Approach 2:
The VDO jig creates a physical template or model of the patient's vertical dimension and fixed points that can be replicated in the dental laboratory. This copying process transfers the precise pre-surgical measurements to the prosthetic phase, maintaining manufacturing precision while allowing for necessary adaptations during denture design and fabrication
Data Source
AI summary
A vertical dimension of occlusion jig includes a vertical support column, a lateral arm support base configured to slide along and rotate about a longitudinal axis of the vertical support column, a first lateral support arm pivotally coupled with the lateral arm support base, a first tooth gantry coupled with the first lateral support arm and adapted to slide along and rotate about a longitudinal axis of the first lateral support arm, a second lateral support arm pivotally coupled with the lateral arm support base, and a second tooth gantry coupled with the second lateral support arm and adapted to slide along and rotate about a longitudinal axis of the second lateral support arm. A temporary anchorage device (TAD) gantry is coupled with the vertical support column and is configured to slide along a longitudinal axis that is perpendicular to the longitudinal axis of the vertical support column.