68,879 results match your criteria Facial Bone Anatomy

[Median mandibular cleft in adults: a case report and literature review].

Pan Afr Med J 2021 11;38:257. Epub 2021 Mar 11.

Service de Chirurgie Maxillo-faciale et Stomatologie, Centre Hospitalier Universitaire Ibn Sina, Rabat, Maroc.

Orofacial clefts are common congenital malformations. Tessier's classification system is the most widely used; it consists of 30 variants including median mandibular clefts (Tessier's cleft No. 30). Read More

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Natural selection increases female fitness by reversing the exaggeration of a male sexually selected trait.

Nat Commun 2021 06 8;12(1):3420. Epub 2021 Jun 8.

Centre for Ecology & Conservation, University of Exeter, Penryn, UK.

Theory shows how sexual selection can exaggerate male traits beyond naturally selected optima and also how natural selection can ultimately halt trait elaboration. Empirical evidence supports this theory, but to our knowledge, there have been no experimental evolution studies directly testing this logic, and little examination of possible associated effects on female fitness. Here we use experimental evolution of replicate populations of broad-horned flour beetles to test for effects of sex-specific predation on an exaggerated sexually selected male trait (the mandibles), while also testing for effects on female lifetime reproductive success. Read More

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Management of Nasal Trauma.

Oral Maxillofac Surg Clin North Am 2021 Jun 1. Epub 2021 Jun 1.

Section of Head & Neck Oncologic and Reconstructive Surgery, Division of Oral & Maxillofacial Surgery, Department of Surgery, Mayo Clinic, Mail Code: ro_ma_12_03E-OS, 200 First Street Southwest, Rochester, MN 55905, USA. Electronic address:

Facial trauma can have long-lasting physical and mental consequences. Trauma to the nose is commonly seen in the emergency department. Nasal lacerations account for 7% of all facial lacerations. Read More

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The Vestibular Shifted Flap Design for Vertical Bone Augmentation in the Maxilla: Case Report and Technical Notes.

Int J Periodontics Restorative Dent 2021 May-Jun;41(3):367-373

During bone augmentation procedures, primary wound healing determines the bone augmentation result. After a crestal incision in the maxilla, the palatal flap might not be an adequate length to correctly couple to the vestibular flap and to seal the wound with horizontal mattress and single sutures. Due to the histologic structure made of dense connective tissue, the palatal flap eversion is impossible, negatively impacting the wound seal and primary healing. Read More

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Relationship of natural occlusal plane with different anatomical landmarks.

J Pak Med Assoc 2021 Mar;71(3):863-867

Department of Prosthodontics, Fatima Jinnah Dental College and Hospital, Karachi, Pakistan.

Objective: To evaluate the parallelism of natural maxillary occlusal plane with inter-pupillary line and ala-tragus line, and to evaluate the anatomic relationship of natural mandibular occlusal plane with retromolar pad among dentate subjects.

Methods: The cross-sectional study was conducted from September 2017 to February 2018 at Fatima Jinnah Dental College, Karachi, and comprised front and profile photographs of subjects aged 20-28 years while holding the camper's plane against the maxillary occlusal plane. The photographs were imported in a software and an interpupillary line was drawn and the angle with Camper's plane was measured. Read More

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Clinical assessment of pterygoid and anterior implants in the atrophic edentulous maxilla: a retrospective study.

Hua Xi Kou Qiang Yi Xue Za Zhi 2021 Jun;39(3):286-292

Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University & Dept. of Dental Implantology, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, China.

Objectives: This study aims to evaluate the short-term clinical outcomes and patient satisfaction of anterior and pterygoid implants in the rehabilitation of edentulous maxilla with posterior atrophy.

Methods: Given a minimum follow-up of 1 year, 25 patients with fixed maxillary rehabilitation over anterior and pterygoid implants were enrolled in this retrospective study. The implant survival rates, peri-implant soft tissue status (including probing depth, modified sulcus bleeding index, and plaque index), marginal bone loss, and patient satisfaction were measured. Read More

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Primary disease sites and patterns of spread in cases of neurolymphomatosis in the orbit associated with lymphoma.

Cancer Imaging 2021 May 26;21(1):39. Epub 2021 May 26.

Department of Neuroradiology, The University of Texas MD Anderson Cancer Center, 1400 Pressler Blvd., Unit 1482, Houston, TX, 77030, USA.

Background: Neurolymphomatosis involving the cranial nerves (CNs) is rare. We sought a better understanding of the primary disease sites and patterns of spread in neurolymphomatosis of the orbit and retro-orbital cranial nerves.

Methods: Patients with lymphoma and MRI evidence of neurolymphomatosis of CN II, III, IV, V, or V were retrospectively reviewed. Read More

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Factors affecting root migration after coronectomy of the mandibular third molar.

Medicine (Baltimore) 2021 May;100(20):e25974

Department of Advanced General Dentistry, College of Dentistry, Yonsei University, Seoul, South Korea.

Abstract: Nerve injury especially inferior alveolar nerve (IAN) is the one of the complications that occur when the mandibular third molar (M3) is extracted and in case of high risk patients, coronectomy might be an alternative to tooth extraction. The purpose of this retrospective study was to analyze root migration and its influencing factors at 6 months after coronectomy in both 2- and 3-dimensions using periapical view and cone-beam computed tomography (CBCT). We analyzed 33 cases of root remnant after coronectomy and measured the amount of migration in CBCT. Read More

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Intraoperative navigation during atresiaplasty for congenital aural atresia.

Int J Pediatr Otorhinolaryngol 2021 Jul 11;146:110756. Epub 2021 May 11.

Department of Otolaryngology-Head and Neck Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA.

Objective: The purpose of this study was to evaluate the feasibility of intraoperative navigation (ION) using adhesive fiducials and high-resolution computed tomography (HRCT) of the temporal bone in pediatric patients undergoing atresiaplasty for congenital aural atresia (CAA).

Methods: From June 2018 to August 2019, a retrospective review was performed on pediatric patients with unilateral or bilateral CAA who underwent atresiaplasty with or without concurrent bone anchored implant (BAI) placement. Single stage atresiaplasty was performed at a tertiary referral center with ION linked to image-guidance compatible HRCT non-contrast temporal bone images. Read More

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The Chromatin Regulator Controls Palate and Cranial Bone Development.

Front Cell Dev Biol 2021 29;9:645386. Epub 2021 Apr 29.

Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.

Epigenetic and chromatin regulation of craniofacial development remains poorly understood. Ankyrin Repeat Domain 11 () is a chromatin regulator that has previously been shown to control neural stem cell fates via modulation of histone acetylation. gene variants, or microdeletions of the 16q24. Read More

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A quick method to expose the structures and relations of the middle ear and inner ear by cadaveric dissection.

Morphologie 2021 May 1. Epub 2021 May 1.

Department of Anatomy, Christian Medical College, Vellore, Tamil Nadu, 632002, India.

Introduction: The temporal bone contains structures related to hearing and balance, and is a valuable learning resource for medical students and trainee surgeons. The middle ear and inner ear are difficult to demonstrate by cadaveric dissection as the structures are closely contained in a small space in the dense temporal bone. Consequently, the teaching and learning of the ear are largely relegated to virtual and theoretical images, and models, which has resulted in a knowledge gap in medical students and prospective surgeons. Read More

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Deformation of Needle Tips during Facial Soft Tissue Filler Injections: An Electron-Microscopic Study.

Aesthet Surg J 2021 May 4. Epub 2021 May 4.

Department of Clinical Anatomy, Mayo Clinic College of Medicine and Science, Rochester, MN.

Background: Injectable soft tissue fillers are used on a global scale for a variety of aesthetic indications. Despite their widespread use, there is a dearth of information regarding the potential repeated injections into tissue have to cause needle deformation. Repeated injections with the same needle result in an increase in force used by the injector to achieve dermal penetration, potentially resulting in decreased precision and increased patient discomfort. Read More

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Understanding Facial Muscle Aging: A Surface Electromyography Study.

Aesthet Surg J 2021 May 4. Epub 2021 May 4.

Department of Clinical Anatomy, Mayo Clinic College of Medicine and Science, Rochester, MN.

Background: Facial aging is a multi-factorial process which involves all tissues of the face including skin, muscles, fat, ligaments, and bone. Whereas robust evidence is available for age-related changes of bone and facial fat, the influence of age on facial muscle activity is poorly understood.

Objectives: The objective of this study was to investigate the motor unit action potential (MUAP) of facial muscles by utilizing surface derived, non-invasive electromyography in young and old healthy volunteers. Read More

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Diseases of the Eyelids and Orbit.

Med Clin North Am 2021 May 2;105(3):551-562. Epub 2021 Apr 2.

Department of Ophthalmology, University of Washington School of Medicine, Box 359608, 325 9th Avenue, Seattle, WA 98104, USA.

The eyelids and orbit encompass intricate bony and soft tissue structures that work harmoniously in concert to protect, support, and nourish the eye in order to facilitate and maintain its function. Insult to periorbital and orbital anatomy can compromise orbital and ocular homeostasis. This article provides a foundational overview of eyelid and orbital anatomy, as well as common and key disorders that may confront internists and medical subspecialists. Read More

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Jaw Periosteum-Derived Mesenchymal Stem Cells Regulate THP-1-Derived Macrophage Polarization.

Int J Mol Sci 2021 Apr 21;22(9). Epub 2021 Apr 21.

Department of Oral and Maxillofacial Surgery, University Hospital Tübingen, 72076 Tübingen, Germany.

Mesenchymal stem cells from bone marrow have powerful immunomodulatory capabilities. The interactions between jaw periosteal cells (JPCs) and macrophages are not only relevant for the application of JPCs in regenerative medicine, but this understanding could also help treating diseases like osteonecrosis of the jaw. In previous studies, we analyzed, for the first time, immunomodulatory features of 2D- and 3D-cultured JPCs. Read More

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Intraoperative Correction of Cochlear Implant Electrode Translocation.

Audiol Neurootol 2021 Apr 29:1-5. Epub 2021 Apr 29.

Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA.

Introduction: Translocation of precurved cochlear implant (CI) electrodes reduces hearing outcomes, but it is not known whether it is possible to correct scalar translocation such that all electrodes reside fully in the scala tympani (ST).

Methods: Six cadaveric temporal bones were scanned with CT and segmented to delineate intracochlear anatomy. Mastoidectomy with facial recess was performed. Read More

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Simplifying Bony Midface Reconstruction with Patient-specific Titanium Plates.

Plast Reconstr Surg Glob Open 2021 Apr 23;9(4):e3555. Epub 2021 Apr 23.

Division of Plastic and Reconstructive Surgery, Louisiana State University Health Sciences Center, New Orleans, La.

Virtual surgical planning and patient-specific osteosynthesis plates provide reconstructive surgeons with the ability to proceed with facial reconstruction of expanding complexity. Moreover, these advances have been shown to reduce the energy, effort, and operating time while helping guide the surgeon toward anatomically correct results. The currently available literature regarding custom-milled plates pertains mostly to reconstructive surgery of the mandible. Read More

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Pleomorphic adenoma of hard palate: a case report.

Pan Afr Med J 2021 9;38:146. Epub 2021 Feb 9.

Département d´Odontologie Chirurgicale, Faculté de Médecine Dentaire de Rabat, Université Mohammed V, Rabat, Maroc.

Pleomorphic adenoma is a benign mixed tumor, which is composed of myoepithelial and epithelial cells. A fibrous capsule separates these cells from the surrounding tissues. Pleomorphic adenoma is the most common salivary gland tumour accounting for 40-70% of all major and minor salivary gland tumours. Read More

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Micro-CT evaluation of maxillary first molars: interorifice distances and internal anatomy of the mesiobuccal root.

Braz Oral Res 2021 26;35:e060. Epub 2021 Apr 26.

Pontifícia Universidade Católica de Minas Gerais - PUCMG, Department of Dentistry, Belo Horizonte, MG, Brazil.

This study aimed to describe the morphometric relationship of root canal orifices on the pulp floor in the presence/absence of mesiobuccal second canal (MB2) in the maxillary first molars and other aspects of its internal anatomy. Sixty-two maxillary first molars were scanned by micro-CT. The presence of the MB2 canal was verified. Read More

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Neuroblastoma metastasized to the mandible and the spinal extradural regions: A case report.

Medicine (Baltimore) 2021 Apr;100(17):e24399

Cancer Center.

Abstract: Neuroblastoma (NB) metastasized into the mandible and spinal extradural region was rarely reported. We present a case with metastatic NB to the mandible and the spinal extradural regions. The patient received chemotherapy using NB 97 regimen and was tumor free after 8 months, but 9 months after the treatment, the patient presented with lower limb paralysis and persistent pain in maxillofacial region as well as swelling in the left mandibular area. Read More

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A Prolonged Time to Diagnosis Due to Misdiagnoses: A Case Report of an Atypical Presentation of Eagle Syndrome.

Am J Case Rep 2021 Apr 26;22:e929816. Epub 2021 Apr 26.

Department of Dental Clinical Sciences, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada.

BACKGROUND Eagle syndrome is an unusual condition in which the styloid process (SP) becomes elongated and causes different clinical symptoms due to pressure on adjacent anatomical structures. The symptoms are non-specific and include severe throat, facial, and ear pain, or headaches. They are usually exacerbated by head rotation, swallowing, yawning, or chewing, but atypical presentations exist. Read More

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Large irritation fibroma of hard palate: a case report of a rare clinical entity.

Pan Afr Med J 2021 19;38:61. Epub 2021 Jan 19.

Department of Otorhinolaryngology, Giannitsa General Hospital, Pella, Greece.

Fibromas are benign tumors of connective tissue common in the oral cavity but rare on hard palate. This paper reports on an asymptomatic, slowly growing mass on the hard palate of a 90-year-old lady, with a reported use of denture for two decades. The patient presented with a 2. Read More

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An early juvenile of Kunpengopterus sinensis (Pterosauria) from the Late Jurassic in China.

An Acad Bras Cienc 2021 19;93(suppl 2):e20200734. Epub 2021 Apr 19.

Chinese Academy of Sciences (CAS), Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, No. 142 Xizhimenwai Street, Beijing, 100044, China.

The Wukongopteridae is a transitional clade between the long- and short-tailed pterosaur groups, and at least ten specimens have been studied without a determined juvenile specimen. Here, we described a small-sized Kunpengopterus sinensis, less than half the size of the holotype, which is the smallest specimen in wukongopterids. Based on unossified small elements, unfused cranial and postcranial elements, and grooves on the bone surface, this specimen is thought to be at least an early juvenile or even a late hatchling. Read More

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OpenEar Image Data Enables Case Variation in High Fidelity Virtual Reality Ear Surgery.

Otol Neurotol 2021 Apr 20. Epub 2021 Apr 20.

MED-EL Elektromedizinische Geräte GesmbH, Innsbruck, Austria Department of Otorhinolaryngology, Rigshospitalet, University of Copenhagen, Copenhagen Alexandra Instituttet, Aarhus, Denmark.

Background: Virtual reality (VR) simulation is an established option for temporal bone surgical training. Most VR simulators are based on computed tomography imaging, whereas the Visible Ear Simulator (VES) is based on high-fidelity cryosections of a single temporal bone specimen. Recently published OpenEar datasets combine cone-beam computed tomography (CBCT) and micro-slicing to achieve similar model quality. Read More

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Maxillofacial Bony Considerations in Facial Transplantation.

Facial Plast Surg 2021 Apr 20. Epub 2021 Apr 20.

Department of Oral and Maxillofacial Surgery, Texas A&M Health Science Center, Dallas, Texas.

Alloplastic facial transplantation has become a new rung on the proverbial reconstructive ladder for severe facial wounds in the past couple of decades. Since the first transfer including bony components in 2006, numerous facial allotransplantations across many countries have been successfully performed, many incorporating multiple bony elements of the face. There are many unique considerations to facial transplantation of bone, however, beyond the considerations of simple soft tissue transfer. Read More

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Costal Osteoma: Report of a Case in an Unusual Site.

Am J Case Rep 2021 Apr 17;22:e930902. Epub 2021 Apr 17.

Department of Pathology, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, South Korea.

BACKGROUND Osteoma is a benign bone tumor that typically arises in facial bones and less frequently in the long bones. It rarely occurs in the appendiceal skeleton. Pathologic findings are similar to those for parosteal osteosarcoma, periostitis ossificans, and osteoid osteoma. Read More

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Signaling Drives Correlated Changes in Facial Morphology and Brain Shape.

Front Cell Dev Biol 2021 29;9:644099. Epub 2021 Mar 29.

Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA, United States.

Canonical Wnt signaling plays multiple roles critical to normal craniofacial development while its dysregulation is known to be involved in structural birth defects of the face. However, when and how Wnt signaling influences phenotypic variation, including those associated with disease, remains unclear. One potential mechanism is via Wnt signaling's role in the patterning of an early facial signaling center, the frontonasal ectodermal zone (FEZ), and its subsequent regulation of early facial morphogenesis. Read More

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Anatomy and Aging of the Perioral Region.

Facial Plast Surg 2021 Apr 12;37(2):176-193. Epub 2021 Apr 12.

Medicina Estética, CM Clinic, Palma de Mallorca, Islas Baleares, Spain.

Perioral region, although severely impacted by facial aging, is often overlooked in texts on facial rejuvenation. Sun exposure, bone resorption, dynamic contraction of the sphincteric and nonsphincteric oral musculature, gravitational pull, histological changes of the skin, and unhealthy habits all take their toll in this area. Fine wrinkling on the lips, deep nasolabial and mentolabial folds, elongation and flattening of the upper lip, downturned corners of the mouth, marionette lines, diminished vermillion and upper teeth show and chin irregularities are the main signs of this process, raising great concern amongst patients and making the perioral region the most demanded area for facial rejuvenation treatment. Read More

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[Frontometaphyseal dysplasia 1 caused by variant of FLNA gene in a case].

Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2021 Apr;38(4):355-358

Shanghai Chindren's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200127, China.

Objective: To explore the clinical and genetic characteristics of a child with frontometaphyseal dysplasia 1 (FMD1) due to variant of FLNA gene.

Methods: Clinical phenotype of the patient was analyzed. Whole exome sequencing (WES) was carried out to detect pathogenic genetic variants. Read More

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Immediate Implant in Maxillary Central Incisors and Prosthetic Screw Channel: A CBCT Feasibility Study.

Int J Periodontics Restorative Dent 2021 Mar-Apr;41(2):245-251

This study aimed to assess how frequently the maxilla anatomy allows for lingualized immediate implants in the central incisor region with a screw channel that has an ideal distance of 1.5 mm from the incisal margin. The effect of abutments with angle correction on case selection will also be verified. Read More

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