COMPARISON OF THE EFFECT OF TWO SURGICAL TECHNIQUES ON THE BIOMECHANICAL STRENGTH OF BICORTICAL SCREWS AND MINIPLATES IN THE ADVANCEMENT OF POLYURETHANE MANDIBLES
Objective: This study aims to compare the biomechanical strength of miniplate and bicortical screw fixation in polyurethane mandibles with bilateral sagittal split osteotomy using either the Obwegeser-DalPont (ODP) or Hunsuck-Epker (HE) surgical cutting techniques. Materials and Method: Thirty-two (...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Istanbul University Press
2024-06-01
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| Series: | Sabiad |
| Subjects: | |
| Online Access: | https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/2BA91BBA4C104211925E8A8EE468589D |
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| Summary: | Objective: This study aims to compare the biomechanical strength of miniplate and bicortical screw fixation in polyurethane mandibles with bilateral sagittal split osteotomy using either the Obwegeser-DalPont (ODP) or Hunsuck-Epker (HE) surgical cutting techniques. Materials and Method: Thirty-two (N=32) polyurethane mandible models were created from data obtained from a tomographic image of a patient. In these models, 4mm advancements were made using ODP and HE cutting techniques. For fixation, 1mm thick, 4-hole, 9mm spaced straight titanium mini plates and 8 titanium screws, 2mm in diameter and 5mm in length, or 6 bicortical screws, 2mm in diameter, were used. Based on the cutting and fixation techniques, four groups were formed, each with 8 (n=8) mandible models. These groups were named M-EPKER, M-DALPONT, B-EPKER, and B-DALPONT, respectively. Fixed models were placed in a universal testing machine, and linear, continuous, and progressively increasing forces were applied from the cutting region. Force magnitudes required to reach displacement values of 1mm, 3mm, and 5mm for the test interface were measured in Newtons (N) and statistically compared. Results: To reach the 1mm displacement level of the test models, the B-EPKER group required a higher force magnitude than the M-EPKER group (p<0.05). At the 3mm level, the B-DALPONT group demonstrated higher force values compared to the M-DALPONT group (p<0.05). Similarly, at the same level, the B-EPKER group reached higher force values than the M-EPKER group (p<0.05). At the 5mm level, both groups using bicortical screws achieved higher values compared to the group using mini plates (p<0.05). Conclusion: Within the limitations of this experimental study, it can be concluded that fixation procedures with bicortical screws in polyurethane models with mandibular advancement, regardless of the surgical technique, are more durable than those with mini plates. |
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| ISSN: | 2651-4060 |