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https://www.readbyqxmd.com/read/28209396/changes-in-bite-force-after-orthognathic-surgical-correction-of-mandibular-prognathism-a-systematic-review
#1
REVIEW
I Islam, A A T Lim, R C W Wong
Patients requesting treatment for mandibular prognathism seek functional and aesthetic improvements. Improvements in bite force and efficiency are generally used as measures of better function. It is unclear what effect the surgical correction of mandibular prognathism will have on the patient's occlusal forces. The literature was searched using medical subject heading (MeSH) and key word terms 'bite force', 'osteotomy', 'orthognathic surgery', and 'prognathism'. A total of 17 articles were included in this review...
February 13, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28199931/a-personalized-3d-printed-prosthetic-joint-replacement-for-the-human-temporomandibular-joint-from-implant-design-to-implantation
#2
David C Ackland, Dale Robinson, Michael Redhead, Peter Vee Sin Lee, Adrian Moskaljuk, George Dimitroulis
Personalized prosthetic joint replacements have important applications in cases of complex bone and joint conditions where the shape and size of off-the-shelf components may not be adequate. The objective of this study was to design, test and fabricate a personalized 3D-printed prosthesis for a patient requiring total joint replacement surgery of the temporomandibular joint (TMJ). The new 'Melbourne' prosthetic TMJ design featured a condylar component sized specifically to the patient and fixation screw positions that avoid potential intra-operative damage to the mandibular nerve...
February 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28186468/nocifensive-behaviors-in-mice-with-radiation-induced-oral-mucositis
#3
Michael W Nolan, C Tyler Long, Karen L Marcus, Shayan Sarmadi, Donald M Roback, Tomoki Fukuyama, Wolfgang Baeumer, B Duncan X Lascelles
Oral mucositis can result in significant dysphagia, and is the most common dose-limiting acute toxicity in head and neck cancer patients receiving chemoradiotherapy. There is a critical need to determine the cellular and molecular mechanisms that underlie radiotherapy-associated discomfort in patients with mucositis. The objective was to induce oral mucositis in mice, using a clinical linear accelerator, and to quantify resultant discomfort, and characterize peripheral sensitization. A clinical linear accelerator was used to deliver ionizing radiation to the oral cavity of mice...
February 10, 2017: Radiation Research
https://www.readbyqxmd.com/read/28174061/the-effect-of-orthognathic-surgery-on-the-temporomandibular-joint-and-oral-function-a-systematic-review
#4
REVIEW
E C Te Veldhuis, A H Te Veldhuis, W M Bramer, E B Wolvius, M J Koudstaal
The objective of this systematic review was to examine the effect of orthognathic surgery (OS) on the temporomandibular joint and oral function. Electronic databases were systematically searched for studies published until October 2015. Articles were assessed against predefined inclusion criteria. The included papers were divided into four groups based on the type of OS performed. The following items were recorded: quality of evidence using the Oxford Centre for Evidence-Based medicine (CEBM) criteria, number of patients, presence/absence of controls, mean age at treatment, follow-up time, clinical examination findings, bite force, use of the Helkimo Index and Research Diagnostic Criteria for Temporomandibular Disorders, imaging findings, and patient questionnaire results...
February 4, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28157595/the-suture-pullout-characteristics-of-human-and-porcine-linea-alba
#5
Gerard M Cooney, Spencer P Lake, Dominic M Thompson, Ryan M Castile, Des C Winter, Ciaran K Simms
There is a substantial prevalence of post-operative incisional hernia for both laparoscopic and laparotomy procedures, but there have been few attempts at quantifying abdominal wound closure methodology in the literature. One method to ascertain a more robust method of wound closure is the identification of the influence of suture placement parameters on suture pullout force. Current surgical practice involves a recommended bite depth and bite separation of 10mm, but the evidence base for this is not clear...
January 24, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28128465/oro-facial-impairment-in-stroke-patients
#6
REVIEW
Martin Schimmel, Takahiro Ono, Otto L T Lam, Frauke Müller
Stroke is considered one of the leading causes of death and acquired disability with a peak prevalence over the age of 80 years. Stroke may cause debilitating neurological deficiencies that frequently result in sensory deficits, motor impairment, muscular atrophy, cognitive deficits and psychosocial impairment. Oro-facial impairment may occur due to the frequent involvement of the cranial nerves' cortical representation areas, central nervous system pathways or motoneuron pools. The aim of this narrative, non-systematic review is to discuss the implications of stroke on oro-facial functions and Oral Health Related Quality of Life (OHRQoL)...
January 27, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28127331/effect-of-modified-widman-flap-surgery-on-maximum-molar-bite-force-a-clinical-trial
#7
Jaber Yaghini, Vahid Sakhaei Manesh, Noushin Janbakhsh
OBJECTIVES: The purpose of the present study was to evaluate the effect of modified Widman flap (MWF) surgery (as a periodontal treatment procedure) on maximum bite force (MBF; as an indicator of patient function). MATERIALS AND METHODS: In this clinical trial, 24 patients were examined for their MBF before and at one, four and eight weeks after their MWF surgery. These recordings along with the patients' demographics were analyzed using repeated measures ANOVA at a significance level of 0...
September 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28075495/oral-tactile-sensitivity-and-masticatory-performance-are-impaired-in-stroke-patients
#8
M Schimmel, G Voegeli, E Duvernay, B Leemann, F Müller
Oro-facial impairment following stroke frequently involves reduced chewing performance, that is oral phase dysphagia. The aim was to investigate the sensitivity of oral tissues following stroke and its potential impact on masticatory function. Therefore, hospitalised post-stroke patients were recruited and compared to healthy controls. Outcome measures comprised masticatory performance employing a colour-mixing ability, that is a bolus-kneading test, maximum lip- and bite force and the one-point and two-point tactile thresholds...
March 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28071906/single-conformation-spectroscopy-of-suberoylanilide-hydroxamic-acid-a-molecule-bites-its-tail
#9
Di Zhang, Karl N Blodgett, Xiao Zhu, Timothy S Zwier
Suberoylanilide hydroxamic acid (SAHA) is a histone deacetylase inhibitor that causes growth arrest and differentiation of many tumor types and is an approved drug for the treatment of cancer. The chemical structure of SAHA consists of formanilide "head" and a hydroxamic acid "tail" separated by an n-hexyl chain, C6H5NH(C═O)-(CH2)6-(C═O)NHOH. The alkyl chain's preference for extended structures is in competition with tail-to-head (T-H) or head-to-tail (H-T) hydrogen bonds between the amide and hydroxamic acid groups...
February 9, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28045812/miniplate-with-a-bendable-c-tube-head-allows-the-clinician-to-alter-biomechanical-advantage-in-extremely-complicated-anatomic-structure
#10
Kyung Won Seo, Nur Serife Iskenderoglu, Eui Hwan Hwang, Kyu-Rhim Chung, Seong-Hun Kim
BACKGROUNDS: This article reports C-tube miniplates as a practical temporary anchorage device choice to treat open bite patients with maxillary sinus pneumatization. METHODS: The C-tube components are titanium anchor plates and monocortical screws that are basically similar to any other miniplate systems, but it has the unique characteristic of the tube head to be malleable. The manipulation of the head part is easy due to the composition of pure titanium. The I-shaped C-tube with 3 holes and T-shaped C-tube miniplates were placed above the apices of maxillary molars as an absolute anchorage system to intrude the posterior maxilla...
December 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28042256/are-temporary-anchorage-devices-truly-effective-in-the-treatment-of-skeletal-open-bites
#11
Hakan Turkkahraman, Mehmet Sarioglu
OBJECTIVE: The aims of this study were to evaluate the effects of temporary anchorage devices (TADs) in the treatment of skeletal open bites and to compare the results with untreated controls. MATERIALS AND METHODS: A total of forty patients with skeletal anterior open bites were assigned to two groups of twenty each. The mean chronological age for the treatment group (14 female, 6 male) was 16.68 ± 2.80 years old, compared with 16.63 ± 2.83 years old for the control group (11 female, 9 male)...
October 2016: European Journal of Dentistry
https://www.readbyqxmd.com/read/28000406/zygomatic-root-position-in-recent-and-fossil-hominids
#12
Gerhard W Weber, Viktoria A Krenn
The relative position of the zygomatic root to the dentition plays a crucial role in determining the overall strength of the face in response to bite forces. The powerful superficial head of the masseter arises there and the zygomaticoalveolar crest (ZAC) is discussed as a buttressing feature of the face. For instance, a more forwardly or backwardly positioned zygomatic root or a lower or higher vertical distance to the dentition could be indicative for evolutionary adaptations to particular loading regimes which are associated with diet...
January 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28000401/opposing-extremes-of-zygomatic-bone-morphology-australopithecus-boisei-versus-homo-neanderthalensis
#13
Yoel Rak, Assaf Marom
The lateral margin of the zygomatic bone of Australopithecus boisei flares both anteriorly and laterally. As a result, the bone loses the suspensory bracing of the facial frame and is transformed into a visor-like structure that supports itself and gains its rigidity from its shape. The coronally oriented bony plates and the outline of the facial mask help the A. boisei face resist the effect of the visor-like structure, which tends to pull the bone plates of the face away from the midline. On the other hand, the nearly sagittal orientation of the zygomatic bone in Homo neanderthalensis helps the face resist torque and bending forces, which themselves stem from the positioning of the bite point on the anterior teeth...
January 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28000400/biomechanical-evaluation-of-different-musculoskeletal-arrangements-in-psittacosaurus-and-implications-for-cranial-function
#14
Adam C Taylor, Stephan Lautenschlager, Zhao Qi, Emily J Rayfield
The masseter muscle complex is a unique feature of extant mammals and their advanced cynodont precursors, originating from the zygomatic arch and inserting onto the lateral surface of the dentary. This muscle complex is absent in sauropsids, with the exception of the neomorphic m. pseudomasseter complex that is unique to psittaciform birds (parrots and cockatiels). The anterior position and anterodorsally inclined line of action of both muscle groups increases leverage of the jaw and is thought to contribute to increased bite force, particularly in psittaciforms...
January 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28000396/the-biomechanics-of-bony-facial-buttresses-in-south-african-australopiths-an-experimental-study-using-finite-element-analysis
#15
Justin A Ledogar, Stefano Benazzi, Amanda L Smith, Gerhard W Weber, Keely B Carlson, Paul C Dechow, Ian R Grosse, Callum F Ross, Brian G Richmond, Barth W Wright, Qian Wang, Craig Byron, Kristian J Carlson, Darryl J De Ruiter, Leslie C Pryor Mcintosh, David S Strait
Australopiths exhibit a number of derived facial features that are thought to strengthen the face against high and/or repetitive loads associated with a diet that included mechanically challenging foods. Here, we use finite element analysis (FEA) to test hypotheses related to the purported strengthening role of the zygomatic root and "anterior pillar" in australopiths. We modified our previously constructed models of Sts 5 (Australopithecus africanus) and MH1 (A. sediba) to differ in the morphology of the zygomatic root, including changes to both the shape and positioning of the zygomatic root complex, in addition to creating variants of Sts 5 lacking anterior pillars...
January 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27998007/mandibular-movements-and-bite-force-in-alzheimer-s-disease-before-and-after-new-denture-insertion
#16
C H Campos, G R Ribeiro, F Stella, R C M Rodrigues Garcia
Chewing impairment has been observed in elders with Alzheimer's disease (AD); however, it is unknown whether oral rehabilitation can improve their masticatory function. This study evaluated the influence of new removable prostheses on chewing function of patients with AD. Participants using removable dentures were divided into two groups: patients with mild AD (77·2 ± 5·8 years, n = 16) and controls (76·0 ± 4·4, n = 16). All participants received general dental treatment and new total and/or partial removable prostheses...
March 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/27990277/biting-the-hand-that-feeds-current-opinion-on-the-interpersonal-causes-correlates-and-consequences-of-borderline-personality-disorder
#17
REVIEW
Sheila E Crowell
Borderline personality disorder (BPD) is a complex psychiatric diagnosis characterized by dysregulated behaviors, emotions, cognitions, and interpersonal relationships. In recent years, developmental psychopathologists have sought to identify early origins of BPD, with the ultimate goal of developing and providing effective preventative interventions for those at highest risk. In addition to heritable biological sensitivities, many scholars assert that environmental and interpersonal risk factors contribute to the emergence and maintenance of key borderline traits...
2016: F1000Research
https://www.readbyqxmd.com/read/27982245/craniofacial-morphology-affects-bite-force-in-patients-with-painful-temporomandibular-disorders
#18
Paula Furlan Bavia, Larissa Soares Reis Vilanova, Renata Cunha Matheus Rodrigues Garcia
Craniofacial morphology affects masticatory performance in healthy dentate subjects, but little is known about its effects in patients with painful temporomandibular disorders (TMDs). Forty-eight female patients (mean age of 28±5.8 years) with painful TMDs underwent lateral cephalometric radiography. Using Ricketts' cephalometric analysis and the Vert method, subjects were assigned to three groups according to their craniofacial morphology: brachyfacial (n=22), mesofacial (n=13), and dolichofacial (n=13). Research diagnostic criteria for TMD were used to confirm the TMD diagnosis for each patient...
September 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27980336/in-patients-with-shortened-dental-arches-do-removable-dental-prostheses-improve-masticatory-performance
#19
Ciaran Moore, Gerry McKenna
Data sourcesPubMed, Medline, Cochrane Library, Embase and Science Direct.Study selectionStudies published in English providing data on patients with shortened dental arch (SDA) and extreme SDA (ESDA) and masticatory performance with removable dental prostheses (RDP) were included.Data extraction and synthesisTwo reviewers independently selected studies and abstracted data, with disagreements being resolved by discussion.ResultsEight studies were included; four reported on comminution studies, three on mixing ability and one included both...
December 2016: Evidence-based Dentistry
https://www.readbyqxmd.com/read/27978915/-features-of-facioscapulohumeral-muscular-dystrophy-in-oral-and-maxillofacial-region-and-mri-analysis-of-facial-muscles
#20
Y H Liu, Y X Ma, J Hu, G D Gao, Y K Wu, Z Y Zhang
Objective: To investigate the manifestation of facioscapulohumeral muscular dystrophy (FSHD) in oral and maxillofacial region. Methods: A total of 12 patients diagnosed as FSHD and 20 healthy volunteers were included in the study. Their medical history was collected from these patients. The decayed missing filled teeth (DMFT), calculus index-simplified (CI-S), occlusal relationship, maximal opening of mouth and maximum bite force were recorded. The impressions were taken to measure the maximal hight of palate and the width of palate...
December 9, 2016: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
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