Repair of Mandibular Fractures: Plating vs. Traditional Techniques

1992 ◽  
Vol 106 (3) ◽  
pp. 245-249 ◽  
Author(s):  
C. Elliott Morgan ◽  
Julius N. Hicks ◽  
Thomas L. Eby ◽  
Thomas E. Borton
Keyword(s):  
Head And Neck ◽  
Structure And Function ◽  
Mandibular Fracture ◽  
Mandibular Fractures ◽  
Rigid Fixation ◽  
Fracture Management ◽  
Fixation Techniques ◽  
And Function ◽  
Compression Plating ◽  
Indications For Use

The treatment of mandibular fractures is a challenge for the otorhinolaryngologist-head and neck surgeon. Recent technologic advances have resulted in the development of rigid fixation techniques that hold promise for the early and optimal restoration of mandibular structure and function. The purpose of this article is to review the dental and orthopedic principles used in our mandibular fracture management, describe compression plating methodology, and discuss optimal techniques for its use. Results using rigid fixation procedures were compared with those using a variety of more traditional techniques in a retrospective analysis of 57 cases. The advantages, limitations, and indications for use of plating technology are discussed, and prevention of complications is emphasized.

Open Reduction and Internal Fixation of Mandibular Fractures

1982 ◽  
Vol 90 (5) ◽  
pp. 576-581 ◽  
Author(s):  
James I. Cohen ◽  
William L. Meyerhoff
Keyword(s):  
Internal Fixation ◽  
Open Reduction ◽  
Surgical Techniques ◽  
Mandibular Fracture ◽  
Mandibular Fractures ◽  
Intermaxillary Fixation ◽  
Advantages And Disadvantages ◽  
Key Points ◽  
Principles Of Treatment ◽  
Indications For Use

Open reduction and internal fixation of mandibular fractures by intraosseous wiring in conjunction with intermaxillary fixation remains the mainstay of mandibular fracture treatment despite the availability of newer methods. The principles of treatment are reviewed, including indications for use of this technique and its advantages and disadvantages. Various surgical techniques are also reviewed and key points in their application emphasized.

Feline Mandibular Fractures

2013 ◽  
Vol 15 (3) ◽  
pp. 211-218 ◽  
Author(s):  
Nicolas Woodbridge ◽  
Martin Owen
Keyword(s):  
Small Animal ◽  
Evidence Base ◽  
Mandibular Fracture ◽  
Fracture Repair ◽  
Dental Occlusion ◽  
Mandibular Fractures ◽  
Wide Range ◽  
Veterinary Surgeon ◽  
Fixation Techniques ◽  
Animal Surgery

Practical relevance: Mandibular fractures occur commonly in cats and appropriate treatment is vital to ensure restoration of dental occlusion and masticatory function. Clinical challenges: Historically, a relatively high complication rate has been reported in association with mandibular fracture repair, and these complications can represent a significant challenge for the veterinary surgeon. Audience: General practitioners as well as specialists in small animal surgery are presented with fractures of the mandible on a regular basis. Patient group: Cats of all ages can suffer mandibular fracture; however, young cats (mean age 30 months) are over-represented. No sex predilection is reported. Equipment: The nature of the equipment required for mandibular fracture repair varies greatly, depending on the fracture type and location. An uncomplicated mandibular symphyseal fracture requires only basic orthopaedic equipment whereas the surgeon must ensure they have access to a wide range of orthopaedic equipment prior to undertaking repair of a complex mandibular fracture. Evidence base: Management of mandibular fractures is a complex subject. Over the past three decades many fixation techniques have been described in the veterinary literature, with authors analysing and discussing the surgical management of these potentially challenging injuries.

scholarly journals MANDIBULAR FRACTURE MANAGEMENT;

2019 ◽  
Vol 26 (04) ◽  
Author(s):  
Manoj Kumar ◽  
Syed Fida Hussain Shah ◽  
Suneel Kumar Panjabi ◽  
Soonhan Abdullah ◽  
Salman Shams
Keyword(s):  
Operative Time ◽  
Mandibular Fracture ◽  
P Value ◽  
Mandibular Fractures ◽  
Maxillomandibular Fixation ◽  
Arch Bar ◽  
Case Series Study ◽  
Fracture Management ◽  
Maxillomandibular Fixation Screws ◽  
Screw Group

Objectives: To compare the efficacy of Maxillomandibular fixation screws versus Erich Arch bar in the management of mandibular fractures. Study Design: Comparative case series study. Setting: Department of Oral & Maxillofacial Surgery, Faculty of Dentistry, Liaquat University Hospital Hyderabad, Jamshoro. Period: 29/03/2016 to 28/09/2016. Methodology: Forty patients of either gender with age above 18 years with mandibular fracture requiring closed reduction were included. 20 patients of Groups A, treated with Maxillomandibular fixation screws and 20 patients of Group B treated with Erich Arch bar. Mean operative time was noted. All patients were followed up on every week up to four weeks. The statistical analysis via t-test was used and P-value <0.05 was categorized as significant. Results: In MMF screw group 13(65.0%) patients were male and 7(35.0%) patients were female whereas in Arch Bar group, 15(75.0%) were male and 5(25.0%) were female. Evidence of wire stick injury was found positive in 2(10.0%) and 4(20.0%) patients among MMF screw and Arch Bar groups respectively. In MMF screw group, mean operative time was 84.20±18.04 minutes whereas in Arch Bar groups it was 121.80±13.68 minutes. The mean operative time is significantly reduced in MMF screw group as compared to Arch Bar group with p value <0.01. Conclusion: We conclude that Maxillomandibular fixation with screws was more worthwhile mode as matched to the conservative Erich arch bars for managing the mandibular fractures.

scholarly journals Management of Isolated Zygomatic Arch Fractures and a Review of External Fixation Techniques

2020 ◽  
Vol 13 (1) ◽  
pp. 38-44
Author(s):  
Jason E. Cohn ◽  
Sammy Othman ◽  
Samuel Bosco ◽  
Tom Shokri ◽  
Marissa Evarts ◽  
...  
Keyword(s):  
External Fixation ◽  
Retrospective Chart Review ◽  
Zygomatic Arch ◽  
Operative Techniques ◽  
Form And Function ◽  
Zygomatic Fracture ◽  
Fracture Management ◽  
Maxillofacial Fractures ◽  
Fixation Techniques ◽  
And Function

Introduction: Fractures of the zygomatic bone can present with complicated aesthetic and neurological pathology. Specifically, management of isolated zygomatic fracture has been sparsely discussed in the literature, and most studies are based upon older techniques. Here, we compare the results of 2 critical operative techniques as well as review the available literature in the setting of isolated zygomatic fractures. Methods: A retrospective chart review was performed at our institution from 2010 to 2018 examining for patients who had sustained an isolated zygomatic fracture confirmed by computed tomography scan. Patients were excluded if they sustained additional maxillofacial fractures. Demographical information, symptoms on presentation, fracture management modality, and postoperative course were all collected and examined. Results: A total of 218 patients were identified for inclusion. The average age of this cohort was 45.5 ± 18 years, with 77.5% being male. Assault (55%) was most the frequent cause of injury with accidents being the least common (17.9%). Most patients (78.8%) underwent nonoperative management. Patients who underwent operation more often presented with zygomatic deformity (97.7% vs 18.4%), paresthesia (29.5% vs 2.9%), and trismus (29.5% vs 6.9%) when compared to their nonoperatively managed counterparts. In all, 44 operatively managed patients underwent open reduction with or without eternal fixation (Gillies Approach vs Keen Approach). There were no significant differences in the presence of zygomatic deformity, paresthesia, and trismus between the 2 operative techniques. Conclusions: Isolated zygomatic arch fractures can present with discerning symptoms. Unfortunately, the literature on appropriate management is not well described. We find external fixation to provide reestablishment of both form and function with minimal required exposure, although the outcomes may be similar without the use of external fixation.

scholarly journals Clinical and functional rationale for the use of intraosseous composite materials-covered screw retainers for mandibular fracture osteosynthesis

2014 ◽  
Vol 95 (2) ◽  
pp. 219-223
Author(s):  
S A Safarov ◽  
A E Shcherbovskih ◽  
Yu V Petrov ◽  
I M Bayrikov
Keyword(s):  
Composite Materials ◽  
Main Part ◽  
Plate Osteosynthesis ◽  
Maxillofacial Surgery ◽  
Mandibular Fracture ◽  
Oral And Maxillofacial Surgery ◽  
Mandibular Fractures ◽  
Rigid Fixation ◽  
Bone Fragments ◽  
Fracture Osteosynthesis

Aim. To increase the effectiveness of mandibular fracture osteosynthesis by using the composite materials-covered intraosseous screw retainers with active combined cutting edge. Methods. 282 patients with mandibular fractures were examined and operated in the clinic of Oral and Maxillofacial Surgery and Dentistry of Samara State Medical University from 2011 to 2013. Surgeries were performed in 257 (91.1%) patients, including plate osteosynthesis - in 133 (47.2%), intraosseous composite materials-coated screw retainers - in 42 (14.9%), uncoated pins - in 65 (23.0%), bone sutures - in 17 (6.0%). Orthopedic and other methods of bone fragments fixation were used in 25 (8.9%) patients. Proposed composite materials-coated osteosynthesis retainer is a square pin with cutting angle of 60-80° and 4 longitudinal grooves of 5-10 mm. The main part is a two-tier helical ribbon with alternating cutting portions, wherein some areas have the same diameter as the main part of the retainer, and the others are 20-100 microns thinner and are covered with TiC0, 65+25% Ca10(PO4)OH2. RESULTS. A comparative analysis with the traditionally used methods was carried out. The main advantages of the proposed method are rigid fixation of mandibular bone fragments and optimal osteogenesis in complex treatment of patients with trauma. Conclusion. The use of the proposed method of mandibular fractures surgical treatment using intraosseous screw retainers with bioactive coating reduced the risk of complications and the length of hospital stay.

scholarly journals The Use of 2.4-mm Locking Plate System in Treating Comminuted Mandibular Fracture by Firearm

2012 ◽  
Vol 5 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Cassiano Costa Silva Pereira ◽  
Pâmela Letícia dos Santos ◽  
Ellen Cristina Gaetti Jardim ◽  
Idelmo Rangel Garcia Júnior ◽  
Elio Hitoshi Shinohara ◽  
...  
Keyword(s):  
Locking Plate ◽  
Mandibular Fracture ◽  
Mandibular Fractures ◽  
Form And Function ◽  
Advantages And Disadvantages ◽  
Mandibular Body ◽  
And Function ◽  
Locking Plate System ◽  
Early Restoration ◽  
Plate System

Maxillofacial trauma caused by firearms has considerably increased, in which the mandibular body is the site of highest incidence of firearm projectiles. In these cases, the use of titanium plates and screws allows the early restoration of form and function of the mandible with stable and predictable results. Recently, conventional plates have been extensively used to treat comminuted mandibular fractures. Nevertheless, the conventional system presents several limitations such as screw compression against the bone interface and the necessity of precise fit of plate to the bone. To overcome such drawbacks, the locking plates have emerged. The present clinical case reported the operative treatment of mandibular fracture caused by firearm projectiles with the use of locking plate. The indications, advantages, and disadvantages of this system are presented.

Structure and function of neural networks in the retina

1988 ◽  
Vol 46 ◽  
pp. 26-27
Author(s):  
Peter Sterling
Keyword(s):  
Ganglion Cells ◽  
Three Dimensional ◽  
Structure And Function ◽  
Synaptic Connections ◽  
Visual Axis ◽  
One Dimensional ◽  
Cat Retina ◽  
Ultrathin Sections ◽  
And Function ◽  
Insight Into

The synaptic connections in cat retina that link photoreceptors to ganglion cells have been analyzed quantitatively. Our approach has been to prepare serial, ultrathin sections and photograph en montage at low magnification (˜2000X) in the electron microscope. Six series, 100-300 sections long, have been prepared over the last decade. They derive from different cats but always from the same region of retina, about one degree from the center of the visual axis. The material has been analyzed by reconstructing adjacent neurons in each array and then identifying systematically the synaptic connections between arrays. Most reconstructions were done manually by tracing the outlines of processes in successive sections onto acetate sheets aligned on a cartoonist's jig. The tracings were then digitized, stacked by computer, and printed with the hidden lines removed. The results have provided rather than the usual one-dimensional account of pathways, a three-dimensional account of circuits. From this has emerged insight into the functional architecture.

Osseointegration interface of calcified bone and endosseous implants

1992 ◽  
Vol 50 (2) ◽  
pp. 1096-1097
Author(s):  
K.E. Krizan ◽  
J.E. Laffoon ◽  
M.J. Buckley
Keyword(s):  
Structure And Function ◽  
Titanium Implants ◽  
En Bloc ◽  
Endosseous Implants ◽  
Ultrastructural Studies ◽  
The Past ◽  
Cacodylate Buffer ◽  
One Year ◽  
And Function

With increase use of tissue-integrated prostheses in recent years it is a goal to understand what is happening at the interface between haversion bone and bulk metal. This study uses electron microscopy (EM) techniques to establish parameters for osseointegration (structure and function between bone and nonload-carrying implants) in an animal model. In the past the interface has been evaluated extensively with light microscopy methods. Today researchers are using the EM for ultrastructural studies of the bone tissue and implant responses to an in vivo environment. Under general anesthesia nine adult mongrel dogs received three Brånemark (Nobelpharma) 3.75 × 7 mm titanium implants surgical placed in their left zygomatic arch. After a one year healing period the animals were injected with a routine bone marker (oxytetracycline), euthanized and perfused via aortic cannulation with 3% glutaraldehyde in 0.1M cacodylate buffer pH 7.2. Implants were retrieved en bloc, harvest radiographs made (Fig. 1), and routinely embedded in plastic. Tissue and implants were cut into 300 micron thick wafers, longitudinally to the implant with an Isomet saw and diamond wafering blade [Beuhler] until the center of the implant was reached.

Use of human autoantibodies and immunoelectron microscopy to study structure and function of the nucleolus and nuclear bodies

1992 ◽  
Vol 50 (1) ◽  
pp. 506-507
Author(s):  
Robert L. Ochs
Keyword(s):  
Electron Microscopy ◽  
Structure And Function ◽  
Nuclear Bodies ◽  
Nuclear Interior ◽  
Coiled Bodies ◽  
Interchromatin Granules ◽  
And Function ◽  
Conventional Electron Microscopy ◽  
Perichromatin Granules ◽  
Perichromatin Fibrils

By conventional electron microscopy, the formed elements of the nuclear interior include the nucleolus, chromatin, interchromatin granules, perichromatin granules, perichromatin fibrils, and various types of nuclear bodies (Figs. 1a-c). Of these structures, all have been reasonably well characterized structurally and functionally except for nuclear bodies. The most common types of nuclear bodies are simple nuclear bodies and coiled bodies (Figs. 1a,c). Since nuclear bodies are small in size (0.2-1.0 μm in diameter) and infrequent in number, they are often overlooked or simply not observed in any random thin section. The rat liver hepatocyte in Fig. 1b is a case in point. Historically, nuclear bodies are more prominent in hyperactive cells, they often occur in proximity to nucleoli (Fig. 1c), and sometimes they are observed to “bud off” from the nucleolar surface.

Depletion and Reconstitution of Active E. Coli Ribosomes

1975 ◽  
Vol 33 ◽  
pp. 640-641
Author(s):  
M. Boublik ◽  
W. Hellmann ◽  
F. Jenkins
Keyword(s):  
Protein Biosynthesis ◽  
Large Subunit ◽  
High Resolution Electron Microscopy ◽  
Small Subunit ◽  
Structure And Function ◽  
Biologically Active ◽  
Biological Macromolecules ◽  
E Coli ◽  
Resolution Electron ◽  
And Function

Correlations between structure and function of biological macromolecules have been studied intensively for many years, mostly by indirect methods. High resolution electron microscopy is a unique tool which can provide such information directly by comparing the conformation of biopolymers in their biologically active and inactive state. We have correlated the structure and function of ribosomes, ribonucleoprotein particles which are the site of protein biosynthesis. 70S E. coli ribosomes, used in this experiment, are composed of two subunits - large (50S) and small (30S). The large subunit consists of 34 proteins and two different ribonucleic acid molecules. The small subunit contains 21 proteins and one RNA molecule. All proteins (with the exception of L7 and L12) are present in one copy per ribosome.This study deals with the changes in the fine structure of E. coli ribosomes depleted of proteins L7 and L12. These proteins are unique in many aspects.

Sign in / Sign up

Export Citation Format

Share Document