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Optimal impression materials for implant-supported fixed complete dentures: A systematic review and meta-analysis
Yong-Qing Guo1, Yun Ma2, Shu-Ning Cai1
1Postgraduate student, Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, Fujian, PR China.
Polyvinyl siloxane (PVS) and polyether (PE) impression materials show similar accuracy for implant-supported fixed complete dentures (IFCDs). PE materials offer better outcomes for angled implants (>15 degrees).
Area of Science:
- Dental Materials Science
- Prosthodontics
- Biomaterials Engineering
Background:
- Conventional impressions are crucial for implant-supported fixed complete dentures (IFCDs).
- Polyvinyl siloxane (PVS) and polyether (PE) are commonly recommended impression materials.
- A definitive consensus on the optimal material for IFCD impressions is lacking.
Purpose of the Study:
- To systematically review and meta-analyze the accuracy of PVS versus PE impression materials for conventional IFCD impressions.
- To guide the selection of optimal impression materials in implant dentistry.
Main Methods:
- Systematic literature search of PubMed, Web of Science, and Embase databases.
- Inclusion of in vitro studies comparing PVS and PE materials using direct (open-tray) or indirect (closed-tray) impression techniques.
- Evaluation of linear and angular deviations between adjacent implants; meta-analysis of continuous data.
Main Results:
- No significant difference in accuracy between PVS and PE materials for general implant angulations.
- Subgroup analysis revealed PE materials showed statistically significant lower linear distance deviations for implants angled >15 degrees with both direct and indirect techniques.
- Limited studies evaluated the indirect technique for angled implants.
Conclusions:
- Both PVS and PE materials provide comparable accuracy for conventional IFCD impressions in most situations.
- Polyether (PE) materials demonstrate superior accuracy for impressions with implants placed at greater than 15-degree angles.
