Evaluation of stress patterns generated by reduction forceps within a photoelastic mandibular model

Byung Ho Choi, Jin Hyoung Park, Tae Min Yoo, Jin Young Huh, Chang Ho Suh

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Introduction: Little attention has been paid to the mechanical effects of fracture reduction forceps. Aim: This study aims to evaluate the stress patterns within the fractured mandible generated by reduction forceps. Material and methods: Thirty-six mandibular models were fabricated using a photoelastic resin. Each of the three sets of mandibular models was osteotomized according to one of three different fracture types. After reducing the cut segments, reduction forceps were placed into different engagement holes to compress the segments. Photoelastic stress analysis was used to visualize the stress patterns within the fractured mandibular models as generated by the reduction forceps. Results: In the case of symphyseal or parasymphyseal fractures, an optimum distribution of stresses over the fracture site was achieved when placing the reduction forceps more than 12mm away from either side of the fracture line, between the midway level of the mandibular height (bisecting the mandible) and 5mm below this level. In the case of body fractures, optimum stress distribution was achieved when the reduction forceps were placed more than 16mm from the fracture line at the midway level. Conclusion: Correct use of the reduction forceps helps to provide a precise three-dimensional reduction for mandibular fractures.

Original languageEnglish
Pages (from-to)120-125
Number of pages6
JournalJournal of Cranio-Maxillofacial Surgery
Issue number2
Publication statusPublished - 2003 Apr

Bibliographical note

Funding Information:
This study was supported by a grant of the Korean Health 21 R&D Project, Ministry of Health & Welfare, Republic of Korea to Choi, Byung-Ho (02-PJ1-PG1-CH07-0001).

All Science Journal Classification (ASJC) codes

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology


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