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mandibular outer cortex

Jia Qiao, Lai Gui, Xi Fu, Feng Niu, Jianfeng Liu, Ying Chen, Meng Wang, Jing Chen, Yuanrong You
BACKGROUND: In patients with mild to moderate Parry-Romberg syndrome (PRS), plastic surgeons have mainly focused on the restoration of soft tissue deficiencies. While, bone deficits are easily overlooked. This study developed a new method combines the autologous mandibular outer cortex (MOC) grafting with fat grafting in mild to moderate patients with PRS, and apply computer-assisted techniques to improve the surgical outcomes and accuracy. METHODS: Seven patients with mild to moderate PRS were prospectively enrolled in the study...
December 16, 2016: Journal of Craniofacial Surgery
Dongmiao Wang, Xiaotong He, Yanling Wang, Guangchao Zhou, Chao Sun, Lianfeng Yang, Jianling Bai, Jun Gao, Yunong Wu, Jie Cheng
The present study was aimed to determine the topographic relationship between root apex of the mesially and horizontally impacted mandibular third molar and lingual plate of mandible. The original cone beam computed tomography (CBCT) data of 364 teeth from 223 patients were retrospectively collected and analyzed. The topographic relationship between root apex and lingual plate on cross-sectional CBCT images was classified as non-contact (99), contact (145) and perforation (120). The cross-sectional morphology of lingual plate at the level of root apex was defined as parallel (28), undercut (38), slanted (29) and round (4)...
December 19, 2016: Scientific Reports
Yunfeng Li, Zhiai Hu, Bin Ye, Yao Liu, Xiaochun Ren, Songsong Zhu
PURPOSE: Orthognathic surgery is an efficient procedure for cosmetic and functional aims. However, when functional improvement is achieved by mandibular or maxillary operations, additional esthetic corrections may be imperative for some patients. This study aims to introduce our primary practice of simultaneous facial bone contouring and orthognathic surgery for esthetic reasons. PATIENTS AND METHODS: Ten patients with dentofacial deformities as well as a prominent angle, asymmetric deformities, or a high zygoma and zygomatic arch were recruited from West China Hospital of Stomatology, Sichuan University (Chengdu, China), between January 1, 2014, and July 31, 2015...
December 2016: Journal of Oral and Maxillofacial Surgery
Giuseppe Spinelli, Davide Lazzeri, Francesco Arcuri, Domenico Valente, Tommaso Agostini
Fractures of the mandibular angle account for 23 to 42% of all facial fractures with a high complication rate (0-32%). Although the ideal treatment remains debatable, two main procedures are commonly used to manage the majority of mandibular angle fractures that are open reduction and internal fixation by a noncompression miniplate placed on the external oblique ridge with or without a second miniplate on the outer cortex. The purpose of this study was to describe our management of mandibular angle fractures by two noncompression miniplates placed on the outer cortex via a transbuccal approach...
September 2016: Craniomaxillofacial Trauma & Reconstruction
Chenglong Wang, Lai Gui, Jianfeng Liu
In this article, the authors present a practical surgical technique using the anatomical character of the inferior alveolar nerve to fully expose the mental nerve (MN) in narrowing genioplasty. During the procedure, a rectangular mandibular outer cortex adjacent to the mental foramen is removed before the osteotomy. The objective is to avoid the injury of the MN from the reciprocating saw or bur and offer abundant space for the surgical operation. The technique has a minimal learning curve and will be useful to plastic surgeons to minimize unintentional cutting or pulling injury to the MN in narrowing genioplasty...
November 2015: Plastic and Reconstructive Surgery. Global Open
Jin Tianjiao, Gui Lai, Niu Feng, Liu Jianfeng, Wang Meng, Chen Ying
OBJECTIVE: To investigate the application of three-dimensional CT(3D-CT) in the treatment of oblique facial clefts with mandibular outer cortex, including the surgical design and results assessment. METHODS: From Jan. 2003 to Dec. 2013, 22 cases with oblique facial cleft, who underwent mandibular outer cortex onlay bone graft were retrospectively studied. 3D images from CT data were reconstructed before operation for design. Then the mandibular outer cortex onlay bone transplant was performed to reconstruct the bone defect and cleft...
September 2014: Zhonghua Zheng Xing Wai Ke za Zhi, Zhonghua Zhengxing Waike Zazhi, Chinese Journal of Plastic Surgery
Lin Yin, Xiaojun Tang, Lei Shi, Hongyu Yin, Zhiyong Zhang
BACKGROUND: Mandibular hypoplasia may result from congenital deformities or trauma or infection during the early stage of facial skeleton development. Deficiencies in the growth of the mandible can not only cause various degrees of facial deformity but also affect breathing and occlusal function. Here, we report our experiences with mandibular distraction combined with orthognathic surgical techniques for the treatment of severe adult mandibular hypoplasia. METHODS: Cephalometric analysis was conducted in all patients for quantitative evaluation...
November 2014: Journal of Craniofacial Surgery
J Rich, B A Golden, C Phillips
The purpose of this study was to review the current literature for the relationship between the preoperative position of the mandibular canal on three-dimensional (3D) radiographic imaging and postoperative neurosensory disturbance (NSD) following a sagittal split ramus osteotomy (SSRO). A literature search was conducted using PubMed, EMBASE, and the Cochrane Database for articles published from 1 January 2000 through 31 December 2013. Studies that included preoperative 3D imaging and assessment of NSD after surgery were reviewed...
September 2014: International Journal of Oral and Maxillofacial Surgery
Jia-Jie Xu, Li Teng, Xiao-Lei Jin, Jian-Jian Lu, Chao Zhang
The extraction of mandibular third molars is a common dental procedure. The complications include hemorrhage, pain, dental fracture, the displacement of teeth or fragments, iatrogenic damage or luxation of the second molar, neurologic injuries, soft tissue damage, subcutaneous emphysema, trismus, swelling, infection, and iatrogenic mandibular fracture. Fracture of the angle of the mandible associated with third molar removal is a rare but severe complication. This article describes a case of mandibular angle fracture associated with third molar extraction after mandibular angle osteotectomy, including a brief review of the literature...
May 2014: Journal of Craniofacial Surgery
Frank Wilde, Karsten Winter, Katharina Kletsch, Kai Lorenz, Alexander Schramm
PURPOSE: Mandible reconstruction with reconstruction plates requires bending the plates during the operation and fixation using the "standard method" (ST-method). The ST-method is limited when a pathological process has perforated the mandibular outer cortex. A transfer key method (TK-method) was developed where plates are pre-bent using a patient-specific mandible model and positioned on the mandible with the help of transfer keys. The ST-method and TK-method were compared in a clinical trial...
February 2015: International Journal of Computer Assisted Radiology and Surgery
Chao Zhang, Li Teng, Fuan Chiang Chan, Jia-Jie Xu, Jian-Jian Lu, Fang Xie, Jing-Yi Zhao, Mei-Bang Xu, Xiao-Lei Jin
BACKGROUND: Various surgical options are reported to address the Asian 'squared face', characterized by a prominent mandibular angle (PMA) associated with an oversized chin deformity; but shortcomings lie in the requirement of multi-stage procedures with the risk of further revision surgery. We have developed a single-stage "Mandibular Angle-Body-Chin Curved Ostectomy (MABCCO) and Outer Cortex Grinding (OCG)" surgical technique to shorten the period of the surgical treatment and minimize the inherent surgical risks in the multi-staged procedures...
October 2014: Journal of Cranio-maxillo-facial Surgery
Pengwei Shi, Jing Hu, Yunfeng Li, Bin Ye, En Luo
Osteochondroma of the mandibular condyle could cause secondary facial asymmetry; besides, it could affect the function of the temporomandibular joint (TMJ) and occlusion. Conventional treatments include total condylectomy or local resection of the lesion and condylar reconstruction. But it cannot effectively ameliorate the facial asymmetry. Thus, this article presents the application of combination surgeries including condylectomy, sliding vertical ramus osteotomy, and mandibular contouring in the treatments of this kind of disease...
March 2014: Journal of Craniofacial Surgery
Wei Liu, Xiao-Jun Tang, Zhi-Yong Zhang, Lin Yin, Lai Gui
AIM: The purpose of this study was to evaluate the role of periosteum on the healing and growth of mandible after mandibular outer cortex osteotomy using three-dimensional computed tomography. METHODS: Eighteen 3-month-old miniature pigs were randomized into three groups. The mandibular outer cortex osteotomy was performed on both sides in group I, and on the left side in group II. In groups I and II, the local periosteum on the left side was resected. In group III, no operation was performed...
September 2014: Journal of Cranio-maxillo-facial Surgery
Xiang Li, Yuchun Hsu, Jing Hu, Ashish Khadka, Tao Chen, Jihua Li
PURPOSE: From an East Asian traditional esthetic viewpoint, a soft facial appearance seems to be more attractive. A prominent mandibular angle, a high zygomatic bone, and an inharmonious chin strongly lessen the attributes of femininity. Attention should be paid to the zygomatic projection and square mandible from the frontal view and the gonial angle and mental region configuration from the lateral view to obtain a slender oval face (melon seed face). PATIENTS AND METHODS: From January 2005 through December 2010, 47 patients underwent a combination of 4 operative techniques to reshape a square face: L-shaped osteotomy, V-line osteotomy, mandibular outer cortex splitting ostectomy, and sliding genioplasty...
October 2013: Journal of Oral and Maxillofacial Surgery
A Gervasio, G D'Orta, I Mujahed, A Biasio
The suprahyoid region extends from the base of the skull to the hyoid bone and includes the pharyngeal, parapharyngeal, parotid, carotid, masticator, retropharyngeal, and perivertebral spaces, as well as the oral cavity. The areas that can be explored by ultrasound include the parotid, carotid, and masticator spaces; the oral cavity; the submandibular and sublingual spaces; the floor of the mouth; and the root of the tongue. The parotid space contains the parotid gland and the excretory duct of Steno, the facial nerve, the external carotid artery, the retromandibular vein, and the intraparotid lymph nodes...
September 2011: Journal of Ultrasound
Tao Chen, Ashish Khadka, Yuchun Hsu, Jing Hu, Dazhang Wang, Jihua Li
INTRODUCTION: For East Asians, correction of square jaw has become one of the commonly performed procedures in aesthetic surgery. While reviewing unsatisfactory cases of mandibular reduction, the authors discovered that failure was largely due to surgeons generally focussing too much on treatment of the posterior part of the mandible, and ignoring the aesthetic significance of the harmonious and smooth overall curve from the anterior mandible to the inferior margin of the mandible. Thus, our group proposes that a coordinated, balanced and smooth jaw line is considered a key factor in Oriental mandibular contouring...
January 2013: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
Sanjog O Chandak, Prashant K Pandilwar, Pankaj R Bhople, Kishor Taori, Tushar O Chandak
The aim of this study was to investigate the position of the mandibular canal through the region of the mandibular angle and body using computed tomographic (CT) imaging, and to relate the findings to those in the molar region on the ankylosed temporomandibular joint (TMJ) and the normal side. The mandibles of 25 patients with unilateral ankylosis of the TMJ (14 women and 11 men) were recorded on coronal CT slices 2mm thick. All patients included in the study had had ankylosis diagnosed before they were 16 years old...
July 2013: British Journal of Oral & Maxillofacial Surgery
Guosong Wang, Jihua Li, Ashish Khadka, Yuchun Hsu, Wenyang Li, Jing Hu
Fracture or defect of the mandible is a serious complication of mandibular angleplasty, and precise reconstruction for such defect is still a huge challenge. This case report provides a new method based on CAD/CAM and rapid prototyped titanium for individual design, fabrication, and implantation of a mandibular ramus and angle. A 25-year-old woman with a square-shaped face, who had undergone mandibular outer cortex split ostectomy (MOCSO) 3 months earlier, was afflicted by a series of symptoms: asymmetric face, collapse of the right face, masticatory problems, deviation during mouth opening, malocclusion, and TMJ clicks...
March 2012: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Dalie Liu, Jinjun Huang, Lei Shan, Jinhuang Wang
There are several surgical techniques for mandibuloplasty, for example, ostectomy of the lateral cortex around the mandibular angle, angle-splitting ostectomy, sagittal split ramus ostectomy, multistage osteotomy of the mandibular angle. These techniques all have achieved excellent aesthetic results, but they require a high level of skill and are time consuming. From July 1995 to June 2010, a total of 1006 patients underwent intraoral curved ostectomy for prominent mandibular angle by grinding, contiguous drilling, and chiseling in our department...
November 2011: Journal of Craniofacial Surgery
Yves Jaquet, Kevin M Higgins, Danny J Enepekides
This article presents a modification of intraoperative external fixation for mandibular reconstruction with free tissue flaps. This technique is indicated when preregistration of the reconstruction plate is not possible due to transmandibular tumor extension. Once standard external fixation has been carried out and prior to segmental mandibulectomy, additional pins are fixed to the connecting rod that delineate the mandibular contour in three-dimensional (3D) space. Following mandibulectomy, these pins allow accurate contouring of the reconstruction plate and improved restoration of mandibular contour, projection, and dental occlusion...
September 2011: Laryngoscope
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