Effect of Rigid Fixation on Orthodontic Finishing After Mandibular Bilateral Sagittal Split Setback: The Case for Miniplate Monocortical Fixation

Cho, Heon Jae

doi:10.1016/j.joms.2011.09.015

Cited by 8 publications

(2 citation statements)

References 37 publications

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“…Utilizing two bicortical screws after BSSRO would not influence the results, simultaneously making orthodontists capable of correcting minor occlusal discrepancies after jaw surgery (17). These results have also been confirmed in other studies (10,(18)(19)(20)(21)(22).…”

Section: Mandibular Setback Stability After Bssrosupporting

confidence: 61%

The Effect of the Mandibular Fixation Method after Bilateral Sagittal Split Ramus Osteotomy on Postoperative Stability: A Literature Review

Yaripoor¹,

Janbaz²

2016

Avicenna J Dent Res

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Context: Using a reliable fixation method after ramus sagittal split osteotomy in order to reduce the chances of treatment relapse and condyle changes is still one of the most noteworthy issues discussed among maxillofacial surgeons. In this study, the results of the up-to-date papers were collected, which identify the effects of the fixation method on the post-operative results, to give the reader a comprehensive view of the new concepts. Evidence Acquisition: The most frequent mandibular surgeries, setbacks, and advancements via the bilateral sagittal split osteotomy technique were used for a literature search due to the abundance of related articles. Consequently, the following keywords were applied: sagittal split ramus osteotomy, orthognathic surgery, rigid fixation, non-rigid fixation, postoperative relapse, and postoperative stability. Results: The articles were classified according to the surgery procedure: mandibular advancement surgery or mandibular setback surgery. The relapse pattern can be divided into two categories: an early relapse, which is strongly related to the surgery procedure, and a late relapse, which can be attributed to the physiologic changes, such as a growth map. The contributing factors can be considered to be the following: a change in ramus in inclination, the mandibular plane, and the fixation type. Conclusions: Using rigid fixation techniques after bilateral sagittal split ramus osteotomy will optimize the stability, but this stability is not influenced by the method of this rigid fixation; although the most commonly suggested technique, bicortical screws, is in the inverted-L position

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Section: Mandibular Setback Stability After Bssrosupporting

confidence: 61%

The Effect of the Mandibular Fixation Method after Bilateral Sagittal Split Ramus Osteotomy on Postoperative Stability: A Literature Review

Yaripoor¹,

Janbaz²

2016

Avicenna J Dent Res

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“…The advantages of traditional 4HMCPf are as follows: a lower degree of inferior alveolar nerve damage [29], faster recovery of inferior alveolar nerve function [30], no scars on the face from transbuccal drilling, the prevention of mandible condylar rotation [4,31], and possible latent positional adjustability of the mandible segment at the fixation site [32]. Despite the popularity and advantages of the 4HMCP [4,5,21,29,30,32], the disadvantages of 4HMCP fixation are as follows. First, the plate should be molded according to the shape of the mandible curve and it is not easy to fit all the holes of the plate perfectly on the mandible surface without distorting the orientation of the bone segments.…”

Section: Advantages and Disadvantages Of Monocortical Platementioning

confidence: 99%

Investigation of a Modified Novel Technique in Bilateral Sagittal Splitting Osteotomy Fixation: Finite Element Analysis and In Vitro Biomechanical Test

Chang

Chen

Jeng

et al. 2020

BioMed Research International

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Purpose. To evaluate the biomechanical properties of the modified novel 2-hole monocortical plate fixation (2HMCPf) and traditional 4-hole monocortical plate fixation (4HMCPf) techniques in bilateral sagittal splitting osteotomy (BSSO) synthesis using a finite element analysis (FEA) and an in vitro biomechanical test with the application of a shearing loading force on a sawbone mandible model. Materials and Methods. A three-dimensional mandible models were generated using the geometry obtained from the computerized tomography image of a sawbone mandible. Plates and screws were generated and combined with the mandible in a CAD environment. The 2HMCPf and traditional 4HMCPf techniques for BSSO osteosynthesis were then analyzed under the occlusal load using the FEA. An in vitro biomechanical test was executed to verify the result of FEA. The force on fixation failure and pattern of failure were recorded. Results. The results revealed that the von Mises Stress on the mandible cortical bone (75.98 MPa) and the screw/plate (457.19 MPa) of the 2HMCPf group was lower than that of the 4HMCPf group (987.68 MPa, 1781.59 MPa). The stress concentrated on the central region of the 4HMCPf group and the distal set of the 2HMCPf group. In vitro study using the sawbone mandible model showed mechanical failure at the region of the proximal segment near the osteotomy site with the 4HMCPf group (average 32.198 N) but no failure on the fixation sites with the 2HMCPf group. Instead, the mandible sawbone fractured on the condyle neck region (average 44.953 N). Conclusion. From the biomechanical perspective, we proved that the 2HMCPf method was able to withstand a higher shearing loading force than the 4HMCPf fixation method in BSSO osteosynthesis.

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Surgical Planning in Orthognathic Surgery and Outcome Stability

Wolford¹,

Gonçalves²

2017

Maxillofacial Surgery

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Effect of Rigid Fixation on Orthodontic Finishing After Mandibular Bilateral Sagittal Split Setback: The Case for Miniplate Monocortical Fixation

Cited by 8 publications

References 37 publications

The Effect of the Mandibular Fixation Method after Bilateral Sagittal Split Ramus Osteotomy on Postoperative Stability: A Literature Review

The Effect of the Mandibular Fixation Method after Bilateral Sagittal Split Ramus Osteotomy on Postoperative Stability: A Literature Review

Investigation of a Modified Novel Technique in Bilateral Sagittal Splitting Osteotomy Fixation: Finite Element Analysis and In Vitro Biomechanical Test

Surgical Planning in Orthognathic Surgery and Outcome Stability

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