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https://www.readbyqxmd.com/read/28431477/duration-of-orthognathic-surgical-treatment
#1
Jaakko Paunonen, Mika Helminen, Timo Peltomäki
OBJECTIVE: The objective of this study was to determine the duration of orthognathic-surgical treatment conducted with conventional pre- and post-surgical orthodontic treatment phases. MATERIAL AND METHODS: The study material was comprised of the files of 185 consecutive patients treated in Oral and Maxillofacial Unit, Tampere University Hospital, Finland, in 2007-2014. The files were reviewed and the following data was obtained: gender and age of patients, ICD-10 diagnosis, type of malocclusion, duration of pre- and post-surgical orthodontic treatment and type of operation...
April 21, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28419845/does-orthognathic-surgery-cause-or-cure-temporomandibular-disorders-a%C3%A2-systematic-review-and-meta-analysis
#2
REVIEW
Essam Ahmed Al-Moraissi, Larry M Wolford, Daniel Perez, Daniel M Laskin, Edward Ellis
PURPOSE: There is still controversy about whether orthognathic surgery negatively or positively affects temporomandibular disorders (TMDs). The purpose of this study was to determine whether orthognathic surgery has a beneficial or deleterious effect on pre-existing TMDs. MATERIALS AND METHODS: A systematic review and meta-analysis were conducted based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. We searched 3 major databases to locate all pertinent articles published from 1980 to March 2016...
March 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28399616/orthodontic-surgical-treatment-and-respiratory-function-rhinomanometric-assessment
#3
Guido Galbiati, Cinzia Maspero, Lucia Giannini, Guia C Guenza, Federica Zanoni, Giampietro Farronato
BACKGROUND: Several correlations between morphological and/or positional alterations of the jaws and respiratory functional impairments have been reported. NAO (Nasal airway obstruction) represents a big deal with no clearly defined "gold- standard" in measurement. Rhinomanometry was adopted by multiple Authors to evaluate whether patients with malocclusion developed respiratory functional changes after an orthodontic-surgical treatment. However there are contrasting findings in literature regarding the possibility of improving respiratory function by means of SARPE or bimaxillary repositioning of the bony bases...
April 11, 2017: Minerva Stomatologica
https://www.readbyqxmd.com/read/28381373/the-use-of-patient-specific-implants-in-orthognathic-surgery-a-series-of-30-mandible-sagittal-split-osteotomy-patients
#4
Juho Suojanen, Junnu Leikola, Patricia Stoor
PURPOSE: Virtual surgery combined with patient-specific saw and drill guides and osteosynthesis materials are rapidly spreading from reconstructive surgery to orthognathic surgery. Most commercial partners are already providing computer-aided design and computer-aided manufacture (CAD/CAM) wafers and patient-specific saw guides. Clear benefits have been demonstrated for custom-made drill guides combined with individually designed three-dimensional (3D) printed patient-specific implants (PSI) as a reposition and fixation system in Le Fort I osteotomy...
March 3, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28316914/morphometric-analysis-of-prognathic-and-non-prognathic-mandibles-in-relation-to-bsso-sites-using-cbct
#5
Tengku Aszraf Tengku Shaeran, Ramizu Shaari, Shafulizan Abdul Rahman, Mohammad Khursheed Alam, Alauddin Muhamad Husin
BACKGROUND: Bilateral sagittal split osteotomy (BSSO) is the most versatile procedure and adopted by many surgeons to relocate the mandible in patients having mandibular prognathism (MP). Injury to the inferior alveolar nerve (IAN) and unfavorable splits are two surgical complications of BSSO which are associated with mandibular morphology. Uses of cone beam computed tomography (CBCT) in providing 3-D images has gained a wider acceptance in surgical field nowadays. Its advantages are including reduced cost, lesser radiation dose and smaller physical footprint comparing to the conventional computed tomography...
January 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/28256278/changes-in-natural-head-position-in-response-to-mandibular-advancement
#6
Xiaozhen Lin, Sean P Edwards
We investigated the change in the natural head position and its relation to the change in the mandibular position in patients with mandibular hypoplasia. Forty-one patients treated by orthognathic surgery were divided into three groups: bilateral sagittal split osteotomy (BSSO) advancement (n=8); BSSO advancement with genioplasty (n=12), and Le Fort I osteotomy with BSSO advancement (n=21). Cone-beam computed tomographic (CT) datasets were collected preoperatively and six weeks postoperatively. The natural head position was measured using the craniocervical angle and the distance from the second vertebra to the frontal plane, and the mandibular position was measured using the craniomandibular angle and the distance from the mandible to the frontal plane...
February 27, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28166135/a-modified-technique-of-mandibular-ramus-sagittal-split-osteotomy-for-prevention-of-inferior-alveolar-nerve-injury-a-prospective-cohort-study-and-outcome-assessment
#7
Peerasak Chortrakarnkij, Daniel Lonic, Hsiu-Hsia Lin, Kazuaki Yamaguchi, Sun-Goo Kim, Lun-Jou Lo
BACKGROUND: Postoperative functional impairment of the inferior alveolar nerve (IAN) has been a common and well-recognized complication. Our study introduced a modified Obwegeser-Dal Pont bilateral sagittal split osteotomy (BSSO) technique and evaluated the subsequent incidence of postoperative neurosensory disturbance of IAN. METHODS: In this prospective cohort study, 57 patients receiving our modified BSSO during orthognathic surgery were enrolled. The technique contained opening the 2 ramus cortices and inserting the osteotome bypassing the IAN to avoid nerve injury...
March 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28157491/intravenous-dexamethasone-administration-before-orthognathic-surgery-reduces-the-postoperative-edema-of-the-masseter-muscle-a-randomized-controlled-trial
#8
Harutsugi Abukawa, Takashi Ogawa, Michihide Kono, Toshiyuki Koizumi, Yoko Kawase-Koga, Daichi Chikazu
PURPOSE: Dexamethasone seems to suppress postoperative swelling. However, the standard administration dose of dexamethasone for bilateral sagittal split osteotomy (BSSO) has not been reported. This study focused on clarifying the most effective dose of dexamethasone for BSSO. MATERIALS AND METHODS: This research was planned as a prospective, randomized controlled, double-blind study. Patients undergoing BSSO were randomly assigned to receive intravenous preoperative dexamethasone under 3 different dose conditions: 16 mg, 8 mg, and 0 mg (control)...
January 9, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28153564/computer-assisted-surgical-planning-and-simulation-for-unilateral-condylar-benign-lesions-causing-facial-asymmetry
#9
Chuan Lu, Dongmei He, Chi Yang, Dong Huang, Edward Ellis
OBJECTIVE: The purpose of this study was to investigate the best surgical sequence for the treatment of unilateral condylar benign lesions causing facial asymmetry by applying computer-assisted surgical planning and simulation. STUDY DESIGN: Computed tomography (CT) data from 12 patients whose maxillary cant was corrected by maintaining the vertical position of the central incisors and equally intruding the long side of the maxilla and extruding the short side were analyzed by ProPlan CMF 1...
April 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28089388/cortical-bone-thickness-of-the-mandibular-canal-and-implications-for-bilateral-sagittal-split-osteotomy-a-cadaveric-study
#10
L Promma, N Sakulsak, P Putiwat, P Amarttayakong, S Iamsaard, H Trakulsuk, K Hirunyakorn, S Suarbua, Y Wattanaraeungchai
Preoperative delineation of the mandibular canal and surrounding cortical bone thickness is mandatory prior to bilateral sagittal split osteotomy (BSSO). The cortical bone thickness of 101 cadaveric mandibles was measured to define the mandibular canal. The mandibles were cut at the anterior ramus, at the third, second, and first molar, and at the premolar. The cortical bone thickness was measured between the mandibular canal and inferior border, buccal cortex, and lingual cortex at each cutting point. No difference was found between the right and left sides of the mandible, or between males and females, with one exception: males were found to have thicker inferior cortical bone at the premolar site than females...
January 12, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28065728/are-there-risk-factors-for-osseous-mandibular-inferior-border-defects-after-bilateral-sagittal-split-osteotomy
#11
J P Verweij, J G van Rijssel, M Fiocco, G Mensink, P J J Gooris, J P R van Merkesteyn
PURPOSE: Bone defects of the inferior mandibular border (osseous inferior border defects) can cause unesthetic postoperative outcomes after bilateral sagittal split osteotomy (BSSO). The aim of this study was to estimate the frequency of osseous inferior border defects after BSSO and to identify risk factors for this complication. MATERIALS AND METHODS: This retrospective study included consecutive patients who underwent BSSO for mandibular retrognathia. The primary outcome was the presence/absence of osseous inferior border defects...
December 21, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27939592/evaluation-of-the-accuracy-of-linear-measurements-on-multi-slice-and-cone-beam-computed-tomography-scans-to-detect-the-mandibular-canal-during-bilateral-sagittal-split-osteotomy-of-the-mandible
#12
B Freire-Maia, V deC Machado, C S Valerio, A L N Custódio, F R Manzi, J L C Junqueira
The aim of this study was to compare the accuracy of linear measurements of the distance between the mandibular cortical bone and the mandibular canal using 64-detector multi-slice computed tomography (MSCT) and cone beam computed tomography (CBCT). It was sought to evaluate the reliability of these examinations in detecting the mandibular canal for use in bilateral sagittal split osteotomy (BSSO) planning. Eight dry human mandibles were studied. Three sites, corresponding to the lingula, the angle, and the body of the mandible, were selected...
March 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27833342/hard-and-soft-tissue-changes-following-maxillary-distraction-osteogenesis-and-mandibular-setback-with-bilateral-sagittal-split-osteotomy
#13
Shilpa S Bawane, Neelam N Andrade
AIMS OF THIS STUDY: (1) To highlight the role of intraoral submerged device in distraction osteogenesis (DO) of patients requiring two jaw surgeries for the correction of severe developmental maxillary hypoplasia (MH) and mandibular prognathism (MP) (2) To analyse the hard and soft tissue changes following maxillary DO and mandibular setback with bilateral sagittal split osteotomy (BSSO) in patients with severe MH and MP requiring two jaw surgeries. MATERIALS AND METHODS: During the period Jan 2004 to Dec 2006, five patients with severe developmental MH along with MP were treated...
December 2016: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/27832719/changes-in-posterior-airway-space-and-hyoid-bone-position-after-surgical-mandibular-advancement
#14
Anni Riepponen, Riitta Myllykangas, Jarno Savolainen, Pauli Kilpeläinen, Jari Kellokoski, Riitta Pahkala
OBJECTIVE: To evaluate cephalometric changes in posterior airway space (PAS) and in hyoid bone distance to mandibular plane (MP) 1-3 years after bilateral sagittal split osteotomy (BSSO). MATERIAL AND METHODS: The sample consisted of 36 females and 16 males who underwent mandibular advancement by BSSO. To observe sagittal changes in PAS and in hyoid bone distance to MP both pre- and postoperative cephalograms were analyzed using WinCeph(®) 8.0 software. For the statistical analyses paired T-test and multivariate logistic regression models were used...
January 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/27789268/prevalence-of-surgical-site-infections-following-orthognathic-surgery-a-double-blind-randomized-controlled-trial-on-a-3-day-versus-1-day-postoperative-antibiotic-regimen
#15
Clayton M Davis, Curtis E Gregoire, Ian Davis, Thomas W Steeves
PURPOSE: The purpose of this study was to determine the effect of a 3- versus 1-day antibiotic regimen on the rate of surgical site infection (SSI) in patients undergoing orthognathic surgery at a department of oral and maxillofacial surgery in Halifax, Nova Scotia, Canada. MATERIALS AND METHODS: A prospective, randomized controlled trial was conducted. All patients received 1 day of intravenous antibiotics after surgery. Then, patients were randomly distributed into groups that received 2 days of additional antibiotics (group A) or placebo (group B)...
April 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27761391/a-novel-step-osteotomy-for-correction-of-hemifacial-microsomia-a-case-report
#16
Debraj Howlader, Dichen P Bhutia, U Vignesh, Divya Mehrotra
Facial asymmetry is one of the commonest facial anomalies, with reported incidence as high as 34%. Hemifacial microsomia (HFM) has an incidence of 1 in every 4000-5600 children and is one of the commonest causes of facial asymmetry. The standard treatment of HFM is orthognathic surgery by bilateral saggital split osteotomy (BSSO) or distraction osteogenesis (DO) of the mandible, both of which involve prolonged periods of occlusal adjustments by an orthodontist. Here, we present distraction of the mandible by means of a novel modified step osteotomy to correct the facial asymmetry in a case of hemifacial microsomia without disturbing the occlusion...
September 2016: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/27643492/-the-3d-printed-drilling-template-for-bilateral-sagittal-osteotomy
#17
J T Wes, P N W J Houppermans, J P Verweij, G Mensink, N Liberton, J P R van Merkesteyn
The bilateral sagittal osteotomy (BSSO) is a widely used surgical technique within orthognatic surgery. The specific osteotomy design may vary from clinic to clinic. The best position of the bone cuts in a BSSO continues to be a point of discussion and probably differs from patient to patient. In addition, standardisation in, for example, research may be desirable. Pre-operative planning using a drilling template in order to position the planned individual saw cuts during BSSO can be of value. To achieve this goal, a pre-operative 3D printed biocompatible drilling template was manufactured for 1 patient on the basis of pre-operative planning...
September 2016: Nederlands Tijdschrift Voor Tandheelkunde
https://www.readbyqxmd.com/read/27613137/influence-of-inferior-border-cut-on-lingual-fracture-pattern-during-bilateral-sagittal-split-osteotomy-with-splitter-and-separators-a%C3%A2-prospective-observational-study
#18
Pascal N W J Houppermans, Jop P Verweij, Gertjan Mensink, Peter J J Gooris, J P Richard van Merkesteyn
Bilateral sagittal split osteotomy (BSSO) is a widely used orthognathic surgery technique. This prospective observational study investigated the correspondence between the planned inferior border cut and the actually executed inferior border cut during BSSO. The influence of the inferior border cut on lingual fracture patterns was also analyzed. Postoperative cone beam computed tomography (CBCT) scans of 41 patients, representing 82 sagittal split osteotomies, were investigated. The inferior border cut was intended to penetrate completely through the caudal cortex...
October 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27542550/evaluation-of-the-transverse-displacement-of-the-proximal-segment-after-bilateral-sagittal-split-ramus-osteotomy-with-different-lingual-split-patterns-and-advancement-amounts-using-the-finite-element-method
#19
Zhi Dai, Min Hou, Wen Ma, Da-Li Song, Chun-Xiang Zhang, Wei-Yuan Zhou
PURPOSE: To evaluate transverse displacement of the proximal segment after bilateral sagittal split ramus osteotomy (BSSO) advancement with different lingual split patterns and advancement amounts and to determine the influential factors related to mandibular width. MATERIALS AND METHODS: A 3-dimensional finite element model of the mandible including the temporomandibular joint was created for a presurgical simulation and for BSSO with lingual split patterns I (T1; Hunsuck split) and II (T2; Obwegeser split)...
November 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27475115/management-of-facial-asymmetry-due-to-overgrowing-costochondral-graft-a-case-report
#20
Arif Razzak, Nabeela Ahmed, Andrew Sidebottom
Costochondral grafts are used to replace the mandibular condyle in cases of TMJ ankylosis, and are generally viewed as a gold standard for autogenous reconstruction of the mandibular condyle (Güven, 2000; Posnick and Goldstein, 1993 [1,2]). We report a case where overgrowth of costochondral grafts is seen, resulting in asymmetric mandibular growth and dentofacial asymmetry (Posnick and Goldstein, 1993 [2]). A 17 year old male patient presented with an existing costochondral graft performed due to TMJ ankylosis during childhood...
2016: International Journal of Surgery Case Reports
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