[Analysis of the effect on the stress of root canal wall by vertical and lateral condensation procedures].

Shanghai Kou Qiang Yi Xue

Department of Oral Medicine, Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China.

Published: October 2003

AI Article Synopsis

  • The study analyzed stress variations in root canal walls during vertical and lateral condensation techniques.
  • The methods involved creating a finite-element model of a mandibular first molar and simulating both condensation procedures to determine stress levels.
  • Results showed that vertical condensation produced higher stress in the root canal wall compared to lateral condensation, indicating that while lateral condensation isn’t directly responsible for vertical root fractures, improper techniques can still pose a risk.

Article Abstract

Objective: To analyse the stress variations of root canal wall that resulted from vertical and lateral condensation.

Methods: On the basis of the finite-element model of the mandibular first molar that modified by step-back technique, mesial-buccal root canal was chosen as tested root canal and simulated the procedure of vertical and lateral condensation. The maximal stress of root canal wall and its position were calculated by special software upon different loading condition.

Results: Stress of root canal wall caused by vertical condensation was higher than that by lateral condensation on the same loading condition. Maximal stress of vertical condensation was located on loading section and one of lateral condensation was located on coronal and middle 1/3 of root. The lower the position that was loaded, the higher the stress of wall of root canal.

Conclusion: Lateral condensation will not bring on vertical root fracture directly,but over-force and improper operation are both dangerous that gives rise to vertical root fracture with whichever method.

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