1.Stability after Bimaxillary Orthognathic Surgery with Rigid Fixation.
Chul Won BIN ; Sanghoon PARK ; Kun Chul YOON ; In Kwon PARK
Journal of the Korean Society of Plastic and Reconstructive Surgeons 2004;31(2):155-161
After bimaxillary orthognathic surgery for correction of facial deformity, the factors influencing stability of bone segment are the amount of bone segment, surgical technique, fixation technique, rotation of proximal segment. The aim of this study is to analyze the significance of the factors influencing skeletal relapse after bimaxillary orthognathic surgery. From March 1994 to march 2003, 11 patients who underwent bimaxillary procedures without genioplasty or any other orthognathic surgical procedures were included for sample. Lateral cephalograms were analyzed before surgery, 1 month and 12 months after surgery respectively. Vertical, horizontal, angular and dental measurements were obtained from each tracing using the horizontal and vertical reference lines. The mean amount of bone movement and relapse was 7.03mm, 2.44mm (35%) respectively at pogonion and 3.41mm, 0.6mm (18%) respectively at point A. After statistical analysis of collected data, the amount of skeletal movement, fixation technique were significantly related to relapse, but rotation of proximal segment, surgical procedures were not significantly related to relapse. Then we suggest that when operation is planned, 20-30% overcorrection was recommended at the time of bimaxillary surgery.
Congenital Abnormalities
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Genioplasty
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Humans
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Orthognathic Surgery*
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Orthognathic Surgical Procedures
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Recurrence
2.Outcome Analysis of Extended, Long, Curved Ostectomy with Outer Cortex Grinding for Prominent Mandibular Angle and Broad Chin to Achieve V-line Contouring.
Han Su YOO ; Sewoon CHOI ; Jeemyung KIM
Archives of Aesthetic Plastic Surgery 2014;20(2):80-84
BACKGROUND: In Asian countries, patients with a square-shaped lower face want a narrow chin as well as improvements in the mandibular angle contour, which is called a "V-line shape." Currently, various surgical techniques have been developed for mandibuloplasty. METHODS: We have developed an extended, long, curved ostectomy, which starts from the inferior mandibular margin below the lateral incisor to the angle, using reciprocating and oscillating saws. We also used a small round bur to grind the outer cortex of the chin and ramus. A total of 243 patients were included in this study from 2012 to 2014. RESULTS: To analyze aesthetic outcomes, we compared mandibular angles and gonial-gonial (G-G) distances on preoperative three-dimensional computed tomography scans with postoperative images. Mandibular measurements demonstrated significant increments in angle degrees on the right (115.2degrees+/-11.1 vs 129.3degrees+/-11.5, P<0.05) and left sides (112.2degrees+/-10.2 vs 130.4degrees+/-11.3, P<0.05). The G-G distance was reduced postoperatively from 123.7 mm+/-7.9 to 110.0 mm+/-3.5 (P<0.05). CONCLUSIONS: In this study, we demonstrate the effectiveness of our technique and assume that we can improve frontal shape and lateral contour with its use.
Asian Continental Ancestry Group
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Chin*
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Humans
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Incisor
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Mandible
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Mandibular Osteotomy
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Orthognathic Surgery
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Orthognathic Surgical Procedures
3.Distraction Osteogenesis of Mandible using Short-Sagittal Osteotomy for the Patient with Hemifacial Microsomia.
Journal of the Korean Society of Plastic and Reconstructive Surgeons 2001;28(5):452-456
Since osteogenesis in the distraction site of the membranous bone has been well proved in histological studies, distraction osteogenesis of the craniofacial skeleton has become popular as an alternative to conventional orthognathic surgical procedures. Nowadays, mandibular distraction has been applied to balance the mandibular asymmetry in various methods. Bone distraction is not a new idea. The technique was already described by many other authors. One of the most important points of view in the distraction osteogenesis is effective elongation of hypoplastic mandible with preservation of the inferior alveolar nerve and tooth bud. From May 1997 to November 2000 we performed 15 distraction osteogenesis of mandible using our new short sagittal ramus osteotomy in patients with hemifacial microsomia. Our short sagittal ramus osteotomy could effectively lengthen the hypoplastic mandible and avoid the injury to the inferior alveolar nerve or tooth bud.
Goldenhar Syndrome*
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Humans
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Mandible*
;
Mandibular Nerve
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Orthognathic Surgical Procedures
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Osteogenesis
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Osteogenesis, Distraction*
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Osteotomy*
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Skeleton
;
Tooth
4.Book review for “Orthognathic Surgery: Principles, Planning and Practice”.
Maxillofacial Plastic and Reconstructive Surgery 2017;39(6):20-
No abstract available.
Orthognathic Surgery
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Books
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Orthognathic Surgical Procedures
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Cephalometry
5.Miniscrews versus surgical archwires for intermaxillary fixation in adults after orthognathic surgery.
Sieun SON ; Seong Sik KIM ; Woo Sung SON ; Yong Il KIM ; Yong Deok KIM ; Sang Hun SHIN
The Korean Journal of Orthodontics 2015;45(1):3-12
OBJECTIVE: We compared the skeletal and dental changes that resulted from the use of two methods of intermaxillary fixation (IMF)-miniscrews and surgical archwire-in 74 adult patients who had Class III malocclusion and were treated with the same orthognathic surgical procedure at a hospital in Korea. METHODS: All the patients underwent Le Fort I osteotomy and bilateral sagittal split ramus osteotomy with rigid fixation. They were divided into two groups according to the type of IMF used-group 1 underwent surgical archwire fixation and group 2 underwent orthodontic miniscrew fixation. In a series of cephalograms for each patient, we compared vertical and horizontal tooth-position measurements: (a) immediately after surgery (T0), (b) 3 months after surgery (T1), and (c) 6 months after surgery (T2). Cephalometric changes within each group were examined using one-way analysis of variance (ANOVA) while the independent samples t-test procedure was used to compare the two groups. RESULTS: After surgery, the maxillary incisors tended to be proclined in both groups although there were no significant differences. Incisor overbite increased significantly in both groups from T0 to T1, and the miniscrew group (group 2) showed slightly greater overbite than the archwire group (group 1). CONCLUSIONS: This study suggest that the use of orthodontic miniscrews and orthodontic surgical archwire for IMF in adult patients results in similar skeletal and dental changes.
Adult*
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Humans
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Incisor
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Korea
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Malocclusion
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Orthognathic Surgery*
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Orthognathic Surgical Procedures
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Osteotomy
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Osteotomy, Sagittal Split Ramus
;
Overbite
6.Treatment of dentofacial deformities secondary to condylar resorption.
West China Journal of Stomatology 2020;38(1):1-5
Treating dentofacial deformities secondary to condylar resorption is a remarkable clinical challenge. Combined orthodontic treatment and orthognathic surgery is currently the main treatment scheme and is often integrated with temporomandibular joint surgery or conservative treatment according to the severity of condylar resorption. This paper discussed the etiology, clinical features, imaging features, treatment options, and prophylaxis of condylar resorption.
Bone Resorption
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Dentofacial Deformities
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Humans
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Mandibular Condyle
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Orthognathic Surgery
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Orthognathic Surgical Procedures
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Temporomandibular Joint
7.A cephalometric study on changes in hyoid bone, tongue and upper airway space according to skeletal change in persons with mandible prognathism after orthognathic surgery
Kyung Wook KIM ; Jong Il CHOUNG ; Chul Hwan KIM
Journal of the Korean Association of Maxillofacial Plastic and Reconstructive Surgeons 2004;26(4):349-358
Orthognathic surgical procedures are designed to correct congenital or acquired dentofacial deformities, achieve cosmetic improvement of the face and dentition. Several investigations have shown that orthognathic surgery influences both the soft and hard tissues in the maxillofacial region, including the tongue and pharyngeal airway. This study was performed to evaluate the changes in the hyoid bone and tongue position, and pharyngeal airway space after mandibular setback osteotomy in 25 patients with mandibular prognathism by means of cephalometric analysis. Lateral cephalograms were obtained at pre-operation(T0) and 2-4days later the operation(T1) and 6 months post-operative follow-up(T2). In this study, we found that there were significant changes in position of hyoid bone and tongue and width of pharyngeal airway space after mandibular setback osteotomy(T1) in persons with mandible prognathism. and except of hyoid bone this change remained stable at 6 months follow up(T2). Especially in analysis with the amount of mandible set back; The cases where the amount of mandible set back was 6~7mm under, there was no significant change in hyoid bone movement. But above 6~7mm there was significant change. The cases where the amount of mandible set back was 11~12mm under, there was no significant change in tongue and pharyngeal airway space width. But above 11~12mm, there was significant change.]]>
Dentition
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Dentofacial Deformities
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Humans
;
Hyoid Bone
;
Mandible
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Orthognathic Surgery
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Orthognathic Surgical Procedures
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Osteotomy
;
Prognathism
;
Tongue
8.A hematologic study of orthognathic surgery patients
Jong Seok LEE ; Seung O KO ; Kil Jung JEONG ; Dae Ho LEEM ; Jin A BAEK ; Hyo Keun SHIN
Journal of the Korean Association of Maxillofacial Plastic and Reconstructive Surgeons 2007;29(2):157-166
Orthognathic surgery for the correction of dentofacial deformities is a common elective procedure. It's possible to occur many complication during the operations and especially, an excesseive bleeding of those may be fatal and so a tranfusion is performing for the prevention and management of that. The most notable of these for reduction of blood loss is the utilization of induced hypotensive anesthetic technique to reduce the mean arterial pressure between 55 and 60 mmHb. Another method for dealing with blood loss following orthognathic surgery is the transfusion of blood obtained as an autologous tranfusion or from banked blood. Some of the disadvantage of banked blood are overcome with the use of predeposited autologous transfusion. But currently, surgeons try so that even autologous transfusion may not transfuse the patients. We made a comparative study of hematologic change and transfusion requirement based on a series of 200 patients who had an orthognathic surgical procedure at Chonbuk National University during the period 2001-2005. This study is to make a comparative analysis of an post-operative hematologic (Hemoglobin, Hematocrit, Red blood cell) change and duration of the procedure under induced hypotensive anesthesia in healthy orthognathic patients.]]>
Anesthesia
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Arterial Pressure
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Dentofacial Deformities
;
Hematocrit
;
Hemorrhage
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Humans
;
Jeollabuk-do
;
Orthognathic Surgery
;
Orthognathic Surgical Procedures
9.Comprehensive correction of maxillofacial bone deformity-consideration and combined application of orthognathic surgery and facial contouring surgery.
West China Journal of Stomatology 2021;39(3):255-259
The maxillofacial skeleton is the basis of the contour of the face. Orthognathic surgery and facial contouring surgery change jaw tissue and affect facial appearance in different manners. Orthognathic surgery is the main method to correct dental and maxillofacial deformities. It changes the shape of the jaw and improves the occlusal relationship by changing the three-dimensional position of the jaw. Facial contouring surgery mainly adopts the method of "bone reduction", which changes the "amount"of the jawbone by cutting a part of the bone tissue to improve the facial appearance, generally without changing oral function. The combined use of orthognathic surgery and facial contouring surgery is becoming increasingly common in clinical practice. This also requires oral and maxillofacial surgeons to have a holistic consideration of the comprehensive correction of maxillofacial bone deformity, and to perform comprehensive analysis of jaw deformities and jaw plastic surgery to achieve the most ideal results. The author's team has been engaged in the clinical work of orthognathic surgery and facial contouring surgery and accumulated rich clinical experience in the comprehensive correction of maxillofacial bone deformity. In this article, the indications, treatment goals, treatment modes, treatment methods, and key points in the surgical operations of comprehensive maxillofacial bone surgery were summarized.
Face/surgery*
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Facial Bones
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Humans
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Maxillofacial Abnormalities
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Orthognathic Surgery
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Orthognathic Surgical Procedures
10.Severe hypothyroidism after orthognathic surgery: a case report.
West China Journal of Stomatology 2021;39(4):489-491
Hypothyroidism is a common endocrine disease with reduced systemic metabolism, but the initial diagnosis is rare in oral and maxillofacial surgery. Due to the nonspecific symptoms, it is easy to be misdiagnosed and missed diagnosis which results in serious consequences. This paper presents a case of severe hypothyroidism which was characterized by airway obstruction, facial swelling, unexplained anaemia and bipedal edema after orthognathic surgery. With review of relevant literatures, this article discusses the risk factors, symptoms, diagnosis and therapy of hypothyroidism.
Edema
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Facial Bones
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Humans
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Hypothyroidism/etiology*
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Orthognathic Surgery
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Orthognathic Surgical Procedures