Polyvinyl Siloxane Impression Technique-Polyvinyl Siloxane Impression Technique Demonstration

Video Transcription

Video Summary

In the video, Dr. David Schwartz demonstrates a polyvinyl siloxane (PVS) impression technique for fabricating an oral appliance. He explains that while digital impressions are gaining popularity, analog impressions still have value. The choice of material for analog impressions can be either water-based materials like alginate or elastomeric materials like PVS. Dr. Schwartz focuses on a two-step PVS process which allows for error correction and equal distribution of material. He emphasizes the importance of capturing detailed tooth anatomy, extending the impression material beyond the gingival tissue crest, and including vestibules for mandibular advancement devices. Dr. Schwartz then demonstrates the process of selecting and modifying a tray, mixing and loading the PVS material, seating the tray, and completing the second step. He highlights the importance of equal pressure and releases the impression one side at a time. The final impression should have adequate material thickness, capture critical details, and be bench stable for laboratory fabrication. Dr. Schwartz concludes by stating the proposed technique is beneficial for training clinicians and staff members who are unfamiliar with PVS materials.

Keywords

polyvinyl siloxane impression technique

oral appliance fabrication

analog impressions

water-based materials

elastomeric materials