A comparative study of lateral condensation, heat-softened gutta-percha, and a modified master cone heat-softened backfilling technique
| Autor: | Unni Endal, Markus Haapasalo, A. H. Reynaud, D Da Silva, Isabelle Portenier, Dag Ørstavik |
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| Rok vydání: | 2002 |
| Předmět: |
Models
Anatomic medicine.medical_specialty Materials science biology Gutta-percha Root Canal Filling Materials biology.organism_classification Lateral condensation Models Dental Root Canal Therapy Surgery Radiography Root Canal Obturation Root filling medicine Humans Extrusion Dental Pulp Cavity Gutta-Percha Tooth Root Composite material General Dentistry Extravasation of Diagnostic and Therapeutic Materials |
| Zdroj: | International Endodontic Journal. 35:1005-1011 |
| ISSN: | 1365-2591 0143-2885 |
| DOI: | 10.1046/j.1365-2591.2002.00610.x |
| Popis: | Aim The aim of the study was to compare the quality of root ¢llings completed by lateral condensation (LC), Therma¢l (TF), and a newtechnique using Therma¢l for back¢lling (BF), with special emphasis on control of over¢lling. Methodology Sixty curved canals in plastic blocks were prepared with the ProFile system to size 40/04 taper in the apical half and to 06 taper in the coronal half. The canals were divided into three groups of 20. Apical patency was veri¢ed with a size 15 K-¢le. The canals were then ¢lled using three diierent techniques: LC (20 canals), TF (20 canals), and BF, where a size 40 master point with sealer was seated prior to the introduction of a size 30 Therma¢l point (20 canals). The same resin-based sealer was used on each occasion. The root ¢llings were assessed using stereomicroscopy for material extrusion, digital radiography for occurrence of voids, and microscopy of sections for voids and thickness of sealer layer. Results Extrusion of both gutta-percha and sealer occurred in all 20 canals ¢lled with the TF technique, but only three and ¢ve cases of sealer extrusion were detected with LC and BF techniques, respectively. No voids were detected in the TF group, whereas small voids were present in most ¢llings in the LC and BF groups. The average total length of the voids was less than 1 mm per canal. The thickness of the sealer layer in the middle and apical parts was greater in the LC and BF groups than in the TF group. Conclusions LC and BF techniques resulted in fewer over¢lls than TF. Voids were absent in TF ¢llings, whilst small voids were found in the LC and BF groups. |
| Databáze: | OpenAIRE |
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