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BSSRO Improves Mandibular Morphology Mainly through Correction of Body Length and Volume in Patients with Asymmetric Mandibular Prognathism. J Clin Med 2022; 11:jcm11237131. [PMID: 36498704 PMCID: PMC9741447 DOI: 10.3390/jcm11237131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/18/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022] Open
Abstract
Purpose: The purpose of this study is to analyze the change and stability of mandibular morphology in patients with asymmetric mandibular prognathism after bilateral sagittal split ramus osteotomy (BSSRO). Methods: We retrospectively analyzed fifty patients with asymmetric mandibular prognathism from the West China Hospital of Stomatology, Sichuan University, between January 2018 to March 2021. The spiral CT data before surgery, within two weeks after surgery, and at more than six months after surgery of each patient were collected. According to the deflection direction of the chin, the bilateral mandibles were defined as the long side and the short side. The morphological data of the bilateral condyle, the mandibular ramus, and the mandibular body were analyzed to determine the effect and stability of BSSRO on asymmetric mandibular prognathism. Results: It was found that the long-side mandible had greater condylar volume and diameter, mandibular ramus height and volume, and mandibular body length and volume (p < 0.05) before surgery. After surgery, the volume of the mandibular ramus increased, while the length and volume of the mandibular body decreased (p < 0.05) at the long side of the mandible; the morphological changes of the mandibular ramus and body at the short side of the mandible were not statistically significant (p > 0.05). When comparing the long and short sides of the mandible, the long side still had greater height and volume of the mandibular ramus (p < 0.01). The volume difference of the mandibular body from the two sides was corrected (p > 0.05), and the length difference of the mandibular body from the two sides was overcorrected (p < 0.05). At more than six months after surgery, the volume of the mandibular ramus and body increased, while their height decreased at the long side of the mandible (p < 0.05). For the other side, or the short side, the volume of the ramus and body increased, too. However, their height decreased (p < 0.01). Conclusion: The results of this study suggested good effect and stability of BSSRO on asymmetric mandibular prognathism, except for the correction of ramus height and volume.
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Long-Term Study of Relapse After Mandibular Orthognathic Surgery: Advancement Versus Setback. J Maxillofac Oral Surg 2022; 21:469-480. [DOI: 10.1007/s12663-020-01445-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 08/25/2020] [Indexed: 10/23/2022] Open
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Shujaat S, Shaheen E, Politis C, Jacobs R. Three-dimensional evaluation of distal and proximal segment skeletal relapse following isolated mandibular advancement surgery in 100 consecutive patients: A one-year follow-up study. Int J Oral Maxillofac Surg 2021; 51:113-121. [PMID: 33888384 DOI: 10.1016/j.ijom.2021.03.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 02/17/2021] [Accepted: 03/31/2021] [Indexed: 10/21/2022]
Abstract
The aim of this study was to perform a three-dimensional evaluation of the skeletal relapse of the proximal and distal mandibular segments following isolated bilateral sagittal split osteotomy advancement surgery. One hundred consecutive patients (mean age 25.8±11.7 years), comprising 65 female patients (mean age 26.4±12.1 years) and 35 male patients (mean age 24.6±11.0 years) requiring mandibular advancement without genioplasty, were enrolled prospectively in the study. Cone beam computed tomography scans were acquired for each patient at three time-points: preoperatively, immediately (1-6 weeks) after surgery, and 1 year after surgery. A validated tool was utilized to assess the surgical movement and relapse. Based on percentage, the majority of the distal and proximal translational and rotational movements relapsed within the range of ≤2mm and ≤2°. The distal segment revealed a significant relapse in a posterior, inferior, and clockwise pitch direction. Both left and right proximal segments showed a significant translational relapse in the medial, posterior, and superior direction. Amongst the rotational parameters, proximal segments relapsed significantly in clockwise pitch, clockwise roll, and counterclockwise yaw direction. Overall, both distal and proximal bone segments showed a clinically acceptable translational and rotational stability. The proximal segments torqued towards their original position with a reduction of flaring.
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Affiliation(s)
- S Shujaat
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.
| | - E Shaheen
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - C Politis
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - R Jacobs
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
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Lee JY, Lee SM, Kim SH, Kim YI. Long-term follow-up of intersegmental displacement after orthognathic surgery using cone-beam computed tomographic superimposition. Angle Orthod 2021; 90:548-555. [PMID: 33378504 DOI: 10.2319/061119-398] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 12/01/2019] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To evaluate intersegmental displacement during long-term follow-up after bilateral sagittal split osteotomy (BSSO) by mandibular body area superimposition. MATERIALS AND METHODS Cone-beam computed tomography (CBCT) images of 23 patients ages 18-37 years with class III malocclusion before orthognathic surgery were obtained. A three-dimensional (3D) CBCT examination was performed at four stages: surgery (T0), 6 months after surgery (T1), 1 year after surgery (T2), and long-term follow-up (6.1 ± 2.1 years, T3). The CBCT datasets were superimposed on the symphyseal area and the lower part of the distal segment of the mandible between T0 and the other time points (T1, T2, and T3). The reference points (both condyle, coronoid, and sigmoid) were estimated by the CBCT analyzed program. RESULTS The coronoid, condylion, and sigmoid showed changes within 6 months after surgery, but there was no significant change in the intersegmental displacement between 6 months and 6 years after surgery. The distances between the left and right coronoid, condylion, and sigmoid from T0 to T3 were noted. CONCLUSIONS The change in intersegmental displacement between T0 and T3 affecting relapse after orthognathic surgery was not significantly different. This suggests that the mandible itself may have a stable morphology during the follow-up period.
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Ji YD, Resnick CM, Peacock ZS. Idiopathic condylar resorption: A systematic review of etiology and management. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 130:632-639. [DOI: 10.1016/j.oooo.2020.07.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/21/2020] [Accepted: 07/15/2020] [Indexed: 12/18/2022]
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Tabrizi R, Pourdanesh F, Sadeghi HM, Shahidi S, Poorian B. Does Fixation Method Affect Stability of Sagittal Split Osteotomy and Condylar Position? J Oral Maxillofac Surg 2017; 75:2668.e1-2668.e6. [DOI: 10.1016/j.joms.2017.08.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 07/21/2017] [Accepted: 08/16/2017] [Indexed: 11/24/2022]
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Veyssiere A, Leprovost N, Ambroise B, Prévost R, Chatellier A, Bénateau H. Study of the mechanical reliability of an S-shaped adjustable osteosynthesis plate for bilateral sagittal split osteotomies. Study on 15 consecutive cases. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2017; 119:19-24. [PMID: 29133198 DOI: 10.1016/j.jormas.2017.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 10/02/2017] [Accepted: 11/01/2017] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The main challenge during the osteosynthesis of a bilateral sagittal split osteotomy (BSSO) is to take into account the correct position of the condyle. Adjustable plates can be used to fine-tune the final occlusion without changing the osteosynthesis. A new type of adjustable plate is presented in this article. The aim is to assess the mechanical reliability of this system during the surgery and during the healing period, thanks to a preliminary prospective on 15 consecutive cases. MATERIAL AND METHODS The bridge of the plate studied here has an "S"-shape and can be bent in two different planes. Fifteen patients presenting a maxilla-mandibular disharmony have been operated on with this device. Clinical results were evaluated three months postoperatively and the mechanical reliability of the device was studied prospectively from teleradiographies of 15 patients operated on in our department. RESULTS This study shows good results, with respect to the mechanical reliability of this S-shaped adjustable plate, three months postoperatively corresponding to the bone-healing period. Radiographic observations did not show any significant displacement at the osteosynthesis site. DISCUSSION This preliminary study shows the mechanical reliability of this new S-shaped adjustable plate. Its semi-rigid character may allow for certain condyle position adaptability. No plate fracture was reported for this 15 patient series. These encouraging results have to be confirmed on a larger series.
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Affiliation(s)
- A Veyssiere
- Department of maxillofacial and plastic surgery, Caen university hospital, 14000 Caen, France; UNICAEN, EA7451, équipe BioConnecT, avenue de la Côte-de-Nacre, 14000 Caen, France; Medicine faculty of Caen, university of Caen-Basse-Normandie, 14032 Caen cedex 5, France.
| | - N Leprovost
- Department of maxillofacial and plastic surgery, Caen university hospital, 14000 Caen, France
| | - B Ambroise
- Department of maxillofacial and plastic surgery, Caen university hospital, 14000 Caen, France; Medicine faculty of Caen, university of Caen-Basse-Normandie, 14032 Caen cedex 5, France
| | - R Prévost
- Department of maxillofacial and plastic surgery, Caen university hospital, 14000 Caen, France
| | - A Chatellier
- Department of maxillofacial and plastic surgery, Caen university hospital, 14000 Caen, France
| | - H Bénateau
- Department of maxillofacial and plastic surgery, Caen university hospital, 14000 Caen, France; UNICAEN, EA7451, équipe BioConnecT, avenue de la Côte-de-Nacre, 14000 Caen, France; Medicine faculty of Caen, university of Caen-Basse-Normandie, 14032 Caen cedex 5, France
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Hågensli N, Stenvik A, Espeland L. Asymmetric mandibular prognathism: Outcome, stability and patient satisfaction after BSSO surgery. A retrospective study. J Craniomaxillofac Surg 2014; 42:1735-41. [DOI: 10.1016/j.jcms.2014.06.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 04/11/2014] [Accepted: 06/05/2014] [Indexed: 10/25/2022] Open
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Rao SH, Selvaraj L, Lankupalli AS. Skeletal stability after bilateral sagittal split advancement and setback osteotomy of the mandible with miniplate fixation. Craniomaxillofac Trauma Reconstr 2014; 7:9-16. [PMID: 24624252 DOI: 10.1055/s-0033-1356763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 02/08/2013] [Indexed: 10/25/2022] Open
Abstract
The purpose of this study was to evaluate intraorally placed mini plates and monocortical screws in terms of postoperative skeletal stability after bilateral sagittal split advancement and setback osteotomy of the mandible. Ten patients were included in this study with five requiring advancement (group I) and five requiring setback of the mandible (group II). Bell and Epker modified surgical technique was followed for all the patients. All the patients underwent pre- and postsurgical orthodontics. Cephalometric radiographs were taken preoperatively, immediate, 3, 6, and 12 months postoperatively. Cephalometric tracings were performed by one individual examiner using a modified burstone analysis. Statistical analysis was performed using the student paired t-test. In advancement patients, SNB (sella, Nasion, B point) angle showed relapse at 12th month postoperative period which was statistically significant (2.4 degrees). No changes were observed in anterior facial height, posterior facial height, Frankfort-mandibular incisor angle (FmiA), and overjet during the follow-up period. In setback patients, posterior facial height (p < 0.05), angles between the lower incisors and mandibular plane and pogonion had a statistically significant change position of 1.4 mm (paired t-test, p = 0.03). The SNB angle, anterior facial height, interincisal angle, and FmiA remained constant (0.8-1.2 degrees) during the follow-up period. In advancement cases, the relapse was seen from the third month postoperative period but in setback cases, the relapse was noted from the sixth month onward and the skeletal relapse in these cases were noticed cephalometrically.
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Affiliation(s)
| | - Loganathan Selvaraj
- Department of Oral and Maxillofacial Surgery, Saveetha Dental College and Hospital
| | - Arathy S Lankupalli
- Department of Oral Medicine and Maxillofacial Radiology, Saveetha Dental College and Hospital
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Kabasawa Y, Sato M, Kikuchi T, Sato Y, Takahashi Y, Higuchi Y, Omura K. Analysis and comparison of clinical results of bilateral sagittal split ramus osteotomy performed with the use of monocortical locking plate fixation or bicortical screw fixation. Oral Surg Oral Med Oral Pathol Oral Radiol 2013; 116:e333-41. [DOI: 10.1016/j.oooo.2012.02.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 01/15/2012] [Accepted: 02/01/2012] [Indexed: 11/24/2022]
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Hågensli N, Stenvik A, Espeland L. Extraoral vertical subcondylar osteotomy with rigid fixation for correction of mandibular prognathism. Comparison with bilateral sagittal split osteotomy and surgical technique. J Craniomaxillofac Surg 2013; 41:212-8. [DOI: 10.1016/j.jcms.2012.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 09/05/2012] [Accepted: 09/05/2012] [Indexed: 11/30/2022] Open
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Ghang MH, Kim HM, You JY, Kim BH, Choi JP, Kim SH, Choung PH. Three-dimensional mandibular change after sagittal split ramus osteotomy with a semirigid sliding plate system for fixation of a mandibular setback surgery. Oral Surg Oral Med Oral Pathol Oral Radiol 2013; 115:157-66. [DOI: 10.1016/j.oooo.2012.02.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Revised: 02/06/2012] [Accepted: 02/12/2012] [Indexed: 10/28/2022]
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Brasileiro BF, Grotta-Grempel R, Ambrosano GMB, Passeri LA. An in vitro evaluation of rigid internal fixation techniques for sagittal split ramus osteotomies: setback surgery. J Oral Maxillofac Surg 2011; 70:941-51. [PMID: 21752510 DOI: 10.1016/j.joms.2011.02.106] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Revised: 02/07/2011] [Accepted: 02/18/2011] [Indexed: 12/01/2022]
Abstract
PURPOSE The aim of this study was to evaluate the biomechanical features of 3 different methods of rigid internal fixation for sagittal split ramus osteotomy for mandibular setback in vitro. MATERIALS AND METHODS Sixty polyurethane replicas of human hemimandibles were used as substrates, simulating a 5-mm setback surgery by sagittal split ramus osteotomy. These replicas served to reproduce 3 different techniques of fixation, including 1) a 4-hole plate and 4 monocortical screws (miniplate group), 2) a 4-hole plate and 4 monocortical screws with 1 additional bicortical positional screw (hybrid group), and 3) 3 bicortical positional screws in a traditional inverted-L pattern (inverted-L group). After fixation, hemimandibles were adapted to a test support and subjected to lateral torsional forces on the buccal molar surface and vertical cantilever loading on the incisal edge with an Instron 4411 mechanical testing unit. Peak loadings at 1, 3, 5, and 10 mm of displacement were recorded. Means and standard deviation were analyzed using analysis of variance and Tukey test with a 5% level of significance, and failures during tests were recorded. RESULTS Regardless of the amount of displacement and direction of force, the miniplate group always showed the lowest load peak scores (P < .01) compared with the other fixation techniques. The hybrid group demonstrated behavior similar to the inverted-L group in lateral and vertical forces at any loading displacement (P > .05). Molar load tests required more force than incisal load tests to promote the same displacement in the mandibular setback model (P < .05). CONCLUSION For mandibular setback surgery of 5 mm, this study concluded that the fixation technique based on the miniplate group was significantly less rigid than the fixation observed in the hybrid and inverted-L groups. Mechanically, adding 1 bicortical positional screw in the retromolar region in the miniplate technique may achieve the same stabilization offered by inverted-L fixation for mandibular sagittal split ramus osteotomy setback surgery in vitro.
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CT scan study of the mandibular nerve intra-mandibular path. REVUE DE STOMATOLOGIE ET DE CHIRURGIE MAXILLO-FACIALE 2011; 112:e5-10. [PMID: 21570100 DOI: 10.1016/j.stomax.2011.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
INTRODUCTION It is mandatory to know the anatomic path of the mandibular nerve and its intra-mandibular connections for numerous odontology, stomatology, and maxillofacial surgical procedures. We present a computed tomography study of the mandibular nerve intra-mandibular path. PATIENTS AND METHOD The computed tomography of 14 mandibles was performed (vestibulo-lingual cross-section) and four landmarks were defined behind the mental foramen. At each landmark, we measured the distance between the alveolar canal and the two cortical layers in the vestibulo-lingual plane, and the distance between the alveolar canal and the alveolar crest, and the inferior border of the mandible in the vertical plane. RESULTS In the vestibulo-lingual plane, the mandibular nerve is located close to the vestibular cortical layer, then to the lingual cortical before it exits. In the crestal plane, it is located at the superior third of the inferior border of the mandible. DISCUSSION In spite of anatomical variability, there is a globally common path which means that the utmost caution should be taken by performing systematic imaging before undertaking any surgery close to the nerve.
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Yamashita Y, Otsuka T, Shigematsu M, Goto M. A long-term comparative study of two rigid internal fixation techniques in terms of masticatory function and neurosensory disturbance after mandibular correction by bilateral sagittal split ramus osteotomy. Int J Oral Maxillofac Surg 2011; 40:360-5. [DOI: 10.1016/j.ijom.2010.11.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 10/14/2010] [Accepted: 11/22/2010] [Indexed: 10/18/2022]
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Gerlach NL, Meijer GJ, Maal TJJ, Mulder J, Rangel FA, Borstlap WA, Bergé SJ. Reproducibility of 3 different tracing methods based on cone beam computed tomography in determining the anatomical position of the mandibular canal. J Oral Maxillofac Surg 2009; 68:811-7. [PMID: 20036043 DOI: 10.1016/j.joms.2009.09.059] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Accepted: 09/12/2009] [Indexed: 10/20/2022]
Abstract
PURPOSE To investigate the reproducibility of 3 different tracing methods to determine a reliable method to define the proper anatomical position of the mandibular canal based on cone beam computed tomography (CBCT) data. MATERIALS AND METHODS Five dentate and 5 edentate patients were selected at random from the CBCT database. Two independent observers traced both the left and the right mandibular canal using 3-dimensional image-based planning software (Procera System NobelGuide; Nobel Biocare, Göteborg, Sweden). All mandibular canals were traced using 3 different methods. Method I was based on coronal views, also known as cross-sections. Panorama-like reconstructions were the starting point for method II. The third method combined methods I and II. RESULTS With respect to interobserver reliability, no significant difference (P = .34) for the various methods was observed. The reproducibility was better in edentate than in dentate jaws (P = .0015). The difference between 2 tracings was the lowest for the combined method: within a range of 1.3 mm in 95% of the course of the canal. The most obvious deviations were mainly seen in the anterior part of the canal. CONCLUSIONS The best reproducible method for mandibular canal tracing is the combined method III. Between observers, still a mean 95th percentile deviation threshold of 1.3 mm (SD 0.384) is noted, indicating that a safety zone of 1.7 mm should be respected. When planning surgery on CBCT-based data, surgeons should be aware of the obvious deviations located in the region of the anterior loop of the canal.
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Affiliation(s)
- Niek L Gerlach
- Department of Oral and Maxillofacial Surgery, Radboud University Nijmegen, Medical Centre, Nijmegen, The Netherlands
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[Computed tomography study of the lower alveolar intra-mandibular nerve path]. ACTA ACUST UNITED AC 2008; 109:358-62. [PMID: 18950822 DOI: 10.1016/j.stomax.2008.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2008] [Revised: 03/05/2008] [Accepted: 04/06/2008] [Indexed: 11/23/2022]
Abstract
INTRODUCTION It is mandatory to know the anatomic path of the lower alveolar nerve and its intramandibular connections for numerous odontology, stomatology, and maxillofacial surgeries. We present a computed tomography study of the lower alveolar nerve intramandibular path. MATERIAL AND METHOD The computed tomography of 14 mandibles was performed (vestibulolingual cross-section) and four landmarks were defined behind the mental foramen. At each landmark we measured the distance between the alveolar canal and the two cortical layers in the vestibulolingual plane, and the distance between the alveolar canal and the alveolar crest, and the inferior border of the mandible in the vertical plane. RESULTS In the vestibulolingual plane, the alveolar nerve is located close to the vestibular cortical layer, then to the lingual cortical before it exits. In the crestal plane, it is located at the superior third of the inferior border of the mandible. DISCUSSION In spite of anatomical variability, there is a globally common path which must lead to the greatest caution by performing systematic imaging before any surgery close to the nerve.
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Stability After Bilateral Sagittal Split Osteotomy Setback Surgery With Rigid Internal Fixation: A Systematic Review. J Oral Maxillofac Surg 2008; 66:1634-43. [DOI: 10.1016/j.joms.2008.01.046] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2007] [Revised: 12/27/2007] [Accepted: 01/09/2008] [Indexed: 11/19/2022]
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Yamashita Y, Mizuashi K, Shigematsu M, Goto M. Masticatory function and neurosensory disturbance after mandibular correction by bilateral sagittal split ramus osteotomy: a comparison between miniplate and bicortical screw rigid internal fixation. Int J Oral Maxillofac Surg 2006; 36:118-22. [PMID: 17150332 DOI: 10.1016/j.ijom.2006.09.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2005] [Revised: 07/28/2006] [Accepted: 09/27/2006] [Indexed: 11/22/2022]
Abstract
Bilateral sagittal split osteotomy is commonly used to treat mandibular prognathism. Several fixation methods for bony segments have been described. The present study compared masticatory function and neurosensory recovery patterns after mandibular correction between two methods of rigid fixation, bicortical screw (n = 38) and monocortical miniplate (n = 32). Patients who had undergone bilateral sagittal split osteotomy for Class III malocclusion were reviewed, and masticatory function and neurosensory recovery were studied with the appropriate indicators at 1, 3, 6 and 12 months postoperatively. Minimal differences were seen between groups at 1-year postoperatively, and although patients treated with miniplate fixation tended to recover faster, with regard to masticatory function and neurosensory disturbance, than those treated with screw fixation, no significant differences were identified. As the two methods seem to provide equal comfort and reliability, the choice should be made by the individual surgeon.
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Affiliation(s)
- Y Yamashita
- Department of Oral and Maxillofacial Surgery, Saga Medical School, 5-1-1 Nabeshima, Saga 849-8501, Japan.
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