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Preliminary impression for maxillary defect: A two-step technique
1Associate Professor, Prosthodontics Department, Faculty of Dental Medicine, Bordeaux University, Bordeaux University Hospital, Saint-André Hospital, Bordeaux, France.
Summary
This study introduces a two-step preliminary impression technique for maxillary defects. It safely captures defect anatomy for prosthodontic rehabilitation, regardless of defect size or oral opening limitations.
Area of Science:
- Dental prosthodontics
- Maxillofacial reconstruction
Background:
- Accurate preliminary impressions are crucial for fabricating custom trays for maxillary defects.
- Conventional irreversible hydrocolloid impressions can be challenging and potentially harmful in defects, especially with limited oral opening.
Purpose of the Study:
- To present a novel, safe, and effective two-step preliminary impression technique for various maxillary defects.
- To overcome the limitations of traditional impression methods in complex oral defects.
Main Methods:
- A two-step impression technique using an elastomeric "obturator bulb" followed by an alginate over-impression.
- The obturator bulb is relined for retention and reinserted before the final alginate impression.
Main Results:
- The described technique successfully records the periphery and height of maxillary defects without complications.
- The method is adaptable to defects of any size and accommodates limited oral opening.
Conclusions:
- This two-step preliminary impression protocol offers a safe and reliable alternative for capturing maxillary defects.
- It simplifies the impression process, enhances patient safety, and ensures accurate data for prosthodontic treatment planning.
