TY - JOUR
TI - Spreader load required for vertical root fracture during lateral compaction ex vivo: evaluation of periodontal simulation and fracture load information
AU - Soros, C.
AU - Zinelis, S.
AU - Lambrianidis, T.
AU - Palaghias, G.
JO - Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology
PY - 2008
VL - 106
TODO - 2
SP - e64-e70
PB - 
SN - 1079-2104, 1528-395X
TODO - 10.1016/j.tripleo.2008.03.027
TODO - acrylic acid resin;  biomedical and dental materials;  elastomer;  root canal filling material, animal;  article;  audiovisual equipment;  biomechanics;  chemistry;  endodontics;  goat;  incisor;  injury;  instrumentation;  mechanical stress;  methodology;  pathophysiology;  periodontium;  tooth fracture;  tooth root;  tooth socket, Acrylic Resins;  Animals;  Biomechanics;  Dental Materials;  Elastomers;  Goats;  Incisor;  Models, Anatomic;  Periodontium;  Root Canal Filling Materials;  Root Canal Irrigants;  Root Canal Obturation;  Root Canal Preparation;  Stress, Mechanical;  Tooth Fractures;  Tooth Root;  Tooth Socket
TODO - Objective: To evaluate the biomechanical influence of the periodontium on spreader load measuring required for vertical root fracture (VRF). Study design: Fully developed permanent incisors (n = 32) from 4 fresh goat mandibles were used. All teeth were subjected to standardized root canal instrumentation and divided into 2 groups: Teeth of group A were tested within natural sockets, and teeth of group B were mounted in artificial sockets and then tested. Spreader was driven to standard depth repeatedly, and insertion load was recorded constantly until intentional VRF. Results: Fracture load in group A varied from 5.9 kg to 25.1 kg, and in group B from 4.3 kg to 26.9 kg. No statistical difference was found between the 2 groups in terms of fracture load or plane of fracture (P > .05). Conclusions: Periodontal simulation by acrylic resin and elastomeric impression material was deemed to be reliable. The inability of fracture load to reveal information about crucial events of the phenomenon was evident. © 2008 Mosby, Inc. All rights reserved.
ER -