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Mandible Anatomy

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1. Functional anatomy of a giant toothless mandible from a bird-like dinosaur: Gigantoraptor and the evolution of the oviraptorosaurian jaw (PubMed)

Functional anatomy of a giant toothless mandible from a bird-like dinosaur: Gigantoraptor and the evolution of the oviraptorosaurian jaw The Oviraptorosauria are a group of theropod dinosaurs that diverged from the typical carnivorous theropod diet. It includes two main lineages - Caenagnathidae and Oviraptoridae - that display a number of differences in mandibular morphology, but little is known about their functional consequences, hampering our understanding of oviraptorosaurian dietary (...) evolution. This study presents the first in-depth description of the giant toothless mandible of Gigantoraptor, the only well-preserved stemward caenagnathid mandible. This mandible shows the greatest relative beak depth among caenagnathids, which is an adaptation seen in some modern birds for processing harder seeds. The presence of a lingual triturating shelf in caenagnathids more crownward than Gigantoraptor suggests a possible increased specialization towards shearing along this lineage. Like other

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2017 Scientific reports

2. Mandible Anatomy

Mandible Anatomy Mandible Anatomy Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Mandible Anatomy Mandible Anatomy Aka: Mandible (...) Anatomy , Mandible , Jaw Anatomy , Temporomandibular Joint Anatomy , Temporomandibular Joint , Masticatory Muscles , Muscles of Mastication II. Physiology: Temporomandibular Synovial joint Condylar process of Mandible articulates with mandibular fossa (part of ) Contains articular disk which allows for smooth hinge and sliding motion Disc is attached to posterior fossa via retrodiscal tendons, vessels and nerves Immediately anterior to external acoustic meatus Joint may be palpated from within ear

2018 FP Notebook

3. Cephalometric studies of the mandible, its masticatory muscles and vasculature of growing Göttingen Minipigs-A comparative anatomical study to refine experimental mandibular surgery. (PubMed)

Cephalometric studies of the mandible, its masticatory muscles and vasculature of growing Göttingen Minipigs-A comparative anatomical study to refine experimental mandibular surgery. Over many decades, the Göttingen Minipig has been used as a large animal model in experimental surgical research of the mandible. Recently several authors have raised concerns over the use of the Göttingen Minipig in this research area, observing problems with post-operative wound healing and loosening implants (...) . To reduce these complications during and after surgery and to improve animal welfare in mandibular surgery research, the present study elucidated how comparable the mandible of minipigs is to that of humans and whether these complications could be caused by specific anatomical characteristics of the minipigs' mandible, its masticatory muscles and associated vasculature. Twenty-two mandibular cephalometric parameters were measured on CT scans of Göttingen Minipigs aged between 12 and 21 months

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2019 PLoS ONE

4. Assessment of Midfacial Hypoplasia in Down Syndrome Fetuses – Validity of a Two-Line Approach and Introduction of a Novel Angle (Maxilla-Mandible-Nasion Angle) (PubMed)

Assessment of Midfacial Hypoplasia in Down Syndrome Fetuses – Validity of a Two-Line Approach and Introduction of a Novel Angle (Maxilla-Mandible-Nasion Angle) To scrutinize the validity of a novel angle (maxilla-mandible-nasion angle, MMN) as objective proof of midfacial hypoplasia in trisomy 21 fetuses.Volume data sets of 2(nd) trimester fetuses were reviewed in this retrospective study. After achievement of the correct midsagittal position, the fetal profile line (FP line (...) °- 22.0°) compared to controls (mean: 20.5°; range: 17.3°-23.7°; p<0.0001). Concomitantly, the PFSR of Down syndrome fetuses was significantly lower (mean: 0.53; range: 0.21-1.22) than in euploid individuals (1.38; range: 0.54-2.23; p<0.0001).Calculation of the novel MMN angle in 2(nd) trimester fetuses reliably allows rapid assessment of craniofacial anatomy in order to rule out the midfacial hypoplasia frequently found in trisomy 21.

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2016 Ultrasound international open

5. Lingual Foramina and Canals of the Mandible: Anatomic Variations in a Lebanese Population (PubMed)

Lingual Foramina and Canals of the Mandible: Anatomic Variations in a Lebanese Population The aim of this study was to evaluate the mandibular lingual foramina (LF) and canals and their anatomic variations using cone-beam computed tomography (CBCT) technology in a Lebanese population.In this study, we analyzed CBCT images of 90 adult Lebanese patients (41 males and 49 females). We assessed the number and location of the LF. In additional, we measured: (a) The distance from both the alveolar (...) crest and the inferior border of the mandible to the LF and (b) the length of the lingual canals (LCs). The data obtained was analyzed statistically using Shapiro-Wilk normality test, t-test, Chi-square, and Fisher's exact tests. Statistical significance was set at 0.05.In our sample, the LF and canals were present in 93.33% of the CBCT analyzed, and the majority (76.64%) was located above the genial tubercles. The distance from the foramen of the superior and the inferior LCs to the alveolar crest

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2017 Journal of clinical imaging science

6. Use of an intraoperative navigation system for retrieving a broken dental instrument in the mandible: a case report (PubMed)

and electromagnetic devices do not provide a precise three-dimensional position. In contrast, computer-aided navigation provides a correlation between preoperatively collected data and intraoperatively encountered anatomy. However, using a navigation system for mandible treatment is difficult as the mobile nature of the mandible complicates its synchronization with the preoperative imaging data during surgery.This report describes a case of a dental instrument breakage in the mandible during an endodontic (...) Use of an intraoperative navigation system for retrieving a broken dental instrument in the mandible: a case report A fracture of root canal instruments, with a fractured piece protruding beyond the apex, is a troublesome incident during an endodontic treatment. Locating and retrieving them represents a challenge to maxillofacial surgeons because it is difficult to access due to the proximity between the foreign body and vital structures. Although safe and accurate for surgery, radiographs

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2017 Journal of medical case reports

7. New records of the dolphin Albertocetus meffordorum (Odontoceti: Xenorophidae) from the lower Oligocene of South Carolina: Encephalization, sensory anatomy, postcranial morphology, and ontogeny of early odontocetes. (PubMed)

New records of the dolphin Albertocetus meffordorum (Odontoceti: Xenorophidae) from the lower Oligocene of South Carolina: Encephalization, sensory anatomy, postcranial morphology, and ontogeny of early odontocetes. We report five new specimens of xenorophid dolphins from North and South Carolina. Four of the specimens represent the xenorophid Albertocetus meffordorum, previously only known from the holotype skull. The other is a fragmentary petrosal from the upper Oligocene Belgrade Formation (...) that we refer to Echovenator sp, indicating at least two xenorophids from that unit. Two of the Albertocetus meffordorum specimens are from the lower Oligocene Ashley Formation: 1) a partial skeleton with neurocranium, fragmentary mandible, ribs, vertebrae, and chevrons, and 2) an isolated braincase. The partial vertebral column indicates that Albertocetus retained the ancestral morphology and locomotory capabilities of basilosaurid archaeocetes, toothed mysticetes, and physeteroids, and caudal

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2017 PLoS ONE

8. Association between the Anatomy of the Mandibular Canal and Facial Types: A Cone-Beam Computed Tomography Analysis (PubMed)

Association between the Anatomy of the Mandibular Canal and Facial Types: A Cone-Beam Computed Tomography Analysis We evaluated the anatomical variations of the mandibular canal associated with various facial types, age, sex, and side of the face studied. We analyzed 348 hemimandibles in subjects without a history of trauma, lesions in the lower arch, or orthognathic or repair surgery in the posterior mandible. Facial type was determined using the VERT index. The canal path was classified

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2018 International journal of dentistry

9. A Rare Case of an Artery Passing through the Median Perforating Canal of the Mandible (PubMed)

of a perforating artery of the mandible, so this case is thought to be rare. Hence, the existence of perforating arteries, such as in the present case, should be taken into consideration in preoperative diagnoses such as for dental implant surgery. Thus, the fusion of anatomical and radiological study is useful and necessary to understand surgical anatomy. (...) A Rare Case of an Artery Passing through the Median Perforating Canal of the Mandible Along with the popularization of dental implant surgery, there has been considerable research on the lingual foramen using cone-beam computed tomography. Anatomical research has also revealed that the arteries entering the lingual foramina are branches of the submental and sublingual arteries. There have been no reports, however, of the submental or sublingual artery entering the mandible from the lingual

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2016 Case reports in dentistry

10. Hyoid Suspension to the Mandible for the Treatment of Obstructive Sleep Apnea

Hyoid Suspension to the Mandible for the Treatment of Obstructive Sleep Apnea Hyoid Suspension to the Mandible for the Treatment of Obstructive Sleep Apnea - Full Text View - ClinicalTrials.gov Hide glossary Glossary Study record managers: refer to the if submitting registration or results information. Search for terms x × Study Record Detail Saved Studies Save this study Warning You have reached the maximum number of saved studies (100). Please remove one or more studies before adding more (...) . Hyoid Suspension to the Mandible for the Treatment of Obstructive Sleep Apnea The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. of clinical studies and talk to your health care provider before participating. Read our for details. ClinicalTrials.gov Identifier: NCT02738112 Recruitment Status : Recruiting First Posted : April 14, 2016 Last Update Posted

2016 Clinical Trials

11. Mandible Anatomy

Mandible Anatomy Mandible Anatomy Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Mandible Anatomy Mandible Anatomy Aka: Mandible (...) Anatomy , Mandible , Jaw Anatomy , Temporomandibular Joint Anatomy , Temporomandibular Joint , Masticatory Muscles , Muscles of Mastication II. Physiology: Temporomandibular Synovial joint Condylar process of Mandible articulates with mandibular fossa (part of ) Contains articular disk which allows for smooth hinge and sliding motion Disc is attached to posterior fossa via retrodiscal tendons, vessels and nerves Immediately anterior to external acoustic meatus Joint may be palpated from within ear

2015 FP Notebook

12. Clinical Anatomy and Significance of the Retromolar Foramina and Their Canals: A Literature Review (PubMed)

Clinical Anatomy and Significance of the Retromolar Foramina and Their Canals: A Literature Review The retromolar foramina (RMF) and the retromolar canal (RMC) are anatomic variants in the mandible located distally to the last molar. The retromolar nerve, which runs through the RMC, is a type 1 bifidity of the mandibular canal. The investigations of the RMF and RMC have been performed by dry mandible studies, the panoramic radiograph (PAN), computed tomography (CT), and the cone beam computed (...) tomography (CBCT) studies. The CBCT has been shown to be the superior method for visualizing the RMF and RMC. There is wide variation in the frequency, location, diameter, and distance of the canal in different individuals. Overall, there is no significant difference in the frequency of the canal in the mandible between sexes or sides of the mandible. The peak incidence of the RMF may occur in adolescence. The RMC is significant due to the neurovascular bundle which runs through it. Injury

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2017 Cureus

13. Surgical anatomy of the vascularized submental lymph node flap: Anatomic study of correlation of submental artery perforators and quantity of submental lymph node. (PubMed)

Surgical anatomy of the vascularized submental lymph node flap: Anatomic study of correlation of submental artery perforators and quantity of submental lymph node. Harvesting the submental flap for vascularized lymph node transfer (VLNT) presents a challenging procedure because of, the topographic variation of the submental artery (SA) and the marginal mandible nerve (MMN) and the limited pedicle length for a free tissue transfer. The aim of this study was to evaluate surgical anatomical (...) of the LNN on the mandible, measured from the gnathion (GT, median-sagittal-plane) toward the gonion (GN, mandibular angle), was at 63.4 ± 5.8 mm (e.g., 65%) of the mandible for the first lymph node (LN), and for the following LNN was at 50.4 ± 7.7 mm (e.g., 52%), 44.0 ± 8.6 mm (e.g., 45%), and 40.50  ±  2.1 mm (e.g., 42%). The MMN consistently crossed the mandible body and the facial artery (FA) from dorso-caudal to ventro-cranial at 72 ± 5.2 mm, e.g., 75% of the mandible's length. Here, the nerve

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2016 Journal of Surgical Oncology

14. Tooth Anatomy

of the hard calcified structures set in the alveolar processes of the mandible and maxilla for mastication of food, or a similar structure. Concepts Body Part, Organ, or Organ Component ( T023 ) MSH SnomedCT 245543004 , 38199008 HL7 TOOTH LNC LP40376-3, LP115763-7, LP115762-9, MTHU014969, MTHU014799, MTHU021292 English Teeth , Tooth , Dentition , Teeth set , Set of teeth , Dentes , structure tooth , tooth structure , teeth , teeth anatomy , tooth , sets teeth , structures tooth , set of teeth , anatomy (...) Tooth Anatomy Tooth Anatomy Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Tooth Anatomy Tooth Anatomy Aka: Tooth Anatomy , Teeth

2018 FP Notebook

15. Evidence-based medicine: Mandible fractures. (PubMed)

Evidence-based medicine: Mandible fractures. After studying this article, the participant should be able to: 1. Describe the anatomy and subunits of the mandible. 2. Review the cause and epidemiology of mandible fractures. 3. Discuss the preoperative evaluation and diagnostic imaging. 4. Understand the principles and techniques of mandible fracture reduction and fixation.The management of mandibular fractures has undergone significant improvement because of advancements in plating technology

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2014 Plastic and reconstructive surgery

16. Fracture, Mandible (Follow-up)

):1756-65. . Snell R, Smith M. The face, scalp, and mouth. Clinical Anatomy for Emergency Medicine . Mosby-Year Book; 1993. 206-41. Cillo JE Jr, Ellis E 3rd. Management of bilateral mandibular angle fractures with combined rigid and nonrigid fixation. J Oral Maxillofac Surg . 2014 Jan. 72(1):106-11. . Gutta R, Tracy K, Johnson C, James LE, Krishnan DG, Marciani RD. Outcomes of mandible fracture treatment at an academic tertiary hospital: a 5-year analysis. J Oral Maxillofac Surg . 2014 Mar. 72(3):550 (...) , Borsuk DE, Okhah Z, Christy MR, Bojovic B, Dorafshar AH, et al. Antibiotics and facial fractures: evidence-based recommendations compared with experience-based practice. Craniomaxillofac Trauma Reconstr . 2015 Mar. 8 (1):64-78. . Media Gallery Anatomy of the mandible. of 1 Tables Contributor Information and Disclosures Author Thomas Widell, MD Vice Chairman, Assistant Professor, Department of Emergency Medicine, Chicago Medical School at Rosalind Franklin University of Medicine and Science; Associate

2014 eMedicine Emergency Medicine

17. Mandible, Fractures

of such injuries. Radiologic evaluation is a standard component of the workup of a suspected mandibular fracture (see the images below). With computed tomography (CT) scanning and panoramic imaging in addition to the basic mandibular radiographic study, a comprehensive evaluation and subsequent identification of all but the most subtle fractures can be achieved. Basic anatomy of the mandible. This midline sagittal drawing illustrates the anterior attachments of the genioglossus and geniohyoid muscles (...) . A new 3-dimensional plate for transoral endoscopic-assisted osteosynthesis of condylar neck fractures. J Oral Maxillofac Surg . 2007 May. 65(5):964-71. . Kellman RM, Cienfuegos R. Endoscopic approaches to subcondylar fractures of the mandible. Facial Plast Surg . 2009 Feb. 25(1):23-8. . Media Gallery Basic anatomy of the mandible. This midline sagittal drawing illustrates the anterior attachments of the genioglossus and geniohyoid muscles. If the symphysis becomes a free fragment (as with bilateral

2014 eMedicine Radiology

18. Distraction Osteogenesis of the Mandible

Next: Relevant Anatomy The mandible is a U-shaped bone. It is the only mobile bone of the facial skeleton, and, since it houses the lower teeth, its motion is essential for mastication. It is formed by intramembranous ossification. The mandible is composed of 2 hemimandibles joined at the midline by a vertical symphysis. The hemimandibles fuse to form a single bone by age 2 years. Each hemimandible is composed of a horizontal body with a posterior vertical extension termed the ramus. Placement (...) be taken to avoid damaging the lingual nerve when one extends the osteotomy through the lingual aspect of the mandible where the nerve lies in close proximity. For more information about the relevant anatomy, see . Previous Next: Contraindications No absolute contraindications to treatment exist. However, relative contraindications are as follows: Patients who are unable or unwilling to comply with the distraction schedule are not ideal candidates for this procedure. Mandibular distraction osteogenesis

2014 eMedicine Surgery

19. Mandible Fractures, General Principles and Occlusion

=aHR0cHM6Ly9lbWVkaWNpbmUubWVkc2NhcGUuY29tL2FydGljbGUvODY4Mzc1LW92ZXJ2aWV3 processing > General Principles of Mandible Fracture and Occlusion Updated: Jan 11, 2016 Author: Edward W Chang, MD, DDS, FACS; Chief Editor: Arlen D Meyers, MD, MBA Share Email Print Feedback Close Sections Sections General Principles of Mandible Fracture and Occlusion Overview Background The mandible is the second most common facial fracture, with the nasal bone being the first. Knowledge of the anatomy of the mandible and the muscular forces applied to it is the key to proper reduction (...) injuries dictate, repair may be delayed 5-7 days, surgical correction is recommended as soon as possible. Current concepts include early intervention with wide surgical exposure to allow for precise alignment and rigid fixation. An image depicting mandible anatomy can be seen below. Anatomy of the mandible. For excellent patient education resources, visit eMedicineHealth's and . Also, see eMedicineHealth's patient education articles and . Next: History of the Procedure The first descriptions

2014 eMedicine Surgery

20. Mandible Fractures in Children

patient. One third of pediatric trauma patients with facial fractures have a mandibular fracture. See the image below. Anatomy of the mandible. The mandible is different from other facial bones in some important respects. In addition to its contribution to facial dimension and symmetry, the mandible has unique and important functional features. The mandible is the only bone in the face that moves in relation to the skull. Additionally, the mandible bears powerful muscular stresses; injury to this bone (...) for jaw immobilization are bilateral fractures with an open bite or severe movement limitation or deviation. See Surgical therapy for a discussion of the indications for surgical therapy in each type of mandible fracture. Previous Next: Relevant Anatomy Distribution of mandibular fractures Patterns of fracture distribution are affected by the force and direction of impact as well as the state of mandibular development of the child. The younger child has relatively more soft tissue cushioning

2014 eMedicine Surgery

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