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Related Experiment Video

Updated: Jun 6, 2026

Establishment and Evaluation of a Sheep Model of Full-thickness Osteochondral Defect
05:23

Establishment and Evaluation of a Sheep Model of Full-thickness Osteochondral Defect

Published on: April 14, 2026

Miniplate osteosynthesis with four different systems in sheep.

R Gutwald1, R Schön, M Metzger

  • 1Department of Oral and Craniomaxillofacial Surgery, University Hospital Freiburg, Freiburg, Germany. ralf.gutwald@uniklinik-freiburg.de

International Journal of Oral and Maxillofacial Surgery
|November 19, 2010
PubMed
Summary

The Mini-Locking-System with self-tapping screws (ST-L) demonstrated superior bone healing and early ossification in sheep osteosynthesis compared to conventional miniplates.

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Surgical innovation

Background:

  • Osteosynthesis aims to stabilize bone fractures for healing.
  • Miniplates and screws are common fixation devices.
  • Locking systems offer enhanced stability.

Purpose of the Study:

  • To compare the efficacy of a locking system with self-tapping (ST-L) or self-drilling-tapping (SDT-L) screws against conventional miniplates with self-tapping (ST) and self-forming (SF) screws.
  • To evaluate bone healing and callus formation in a sheep osteotomy model.

Main Methods:

  • Standardized osteotomy and osteosynthesis in 24 sheep using four different fixation systems.
  • Callus formation assessed via CT scans with navigation assistance.
  • Histological examination of osteotomy gap specimens.

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Last Updated: Jun 6, 2026

Establishment and Evaluation of a Sheep Model of Full-thickness Osteochondral Defect
05:23

Establishment and Evaluation of a Sheep Model of Full-thickness Osteochondral Defect

Published on: April 14, 2026

Establishment of a Segmental Femoral Critical-size Defect Model in Mice Stabilized by Plate Osteosynthesis
06:38

Establishment of a Segmental Femoral Critical-size Defect Model in Mice Stabilized by Plate Osteosynthesis

Published on: October 12, 2016

Stabilizing a Femur Osteotomy with a Plate Fixation in Ambystoma mexicanum
05:45

Stabilizing a Femur Osteotomy with a Plate Fixation in Ambystoma mexicanum

Published on: April 12, 2024

Main Results:

  • The Mini-Locking-System with self-tapping screws (ST-L) showed the best results, with early ossification and minimal callus.
  • Slower healing observed with miniplates and self-forming screws (SF).
  • ST, SF, and SDT-L systems showed increased bone formation at 8 weeks, comparable to ST-L at 4 weeks.

Conclusions:

  • The ST-L system provides improved osteosynthesis stability, leading to accelerated bone healing.
  • Enhanced stability promotes early ossification and reduces callus formation.
  • Locking systems with self-tapping screws represent a significant advancement in fracture fixation.