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Reducing apical voids for intra-canal sealer injection using a modified passive deflation needle
Zhuo Chen1, Yanling Yang1, Wei Fan2
1State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China.
Odontology
|January 20, 2024
Summary
A new modified passive deflation needle effectively minimizes voids during iRoot SP sealer injection in root canals. This innovation significantly reduces both the length and volume of apical voids in resin models and extracted teeth.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomaterials
Background:
- Apical voids are a common challenge in root canal filling.
- Incomplete obturation can lead to endodontic treatment failure.
- iRoot SP sealer is a commonly used bioceramic sealer.
Purpose of the Study:
- To evaluate a modified passive deflation needle for reducing apical voids.
- To compare the efficacy of the modified needle versus a standard needle for iRoot SP sealer injection.
- To assess void reduction in both resin block models and extracted teeth.
Main Methods:
- Design and fabrication of a modified passive deflation needle.
- Preparation of resin block models and extracted premolars to standardized file sizes (#25/04, #25/06).
- Injection of iRoot SP sealer using either the modified or a normal plastic needle.
- Radiographic analysis of apical void length in resin blocks.
- Micro-computed tomography (micro-CT) analysis of void volume in extracted teeth.
Main Results:
- The modified needle group showed significantly lower apical void length in resin blocks compared to the normal needle group (P < 0.05).
- Micro-CT analysis revealed a significantly lower volumetric percentage of voids in the modified needle group for extracted teeth (P < 0.05).
- The modified passive deflation needle demonstrated superior performance in reducing voids in both tested models.
Conclusions:
- The modified passive deflation needle is effective in reducing apical voids during intra-canal iRoot SP sealer injection.
- This needle design offers a promising solution for improving root canal obturation quality.
- Further clinical studies are warranted to confirm these findings in vivo.
