Search

Copyright of Journal of Health Sciences of Kocaeli University / Kocaeli Üniversitesi Sağlık Bilimleri Dergisi is the property of Institute of Health Sciences of Kocaeli University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Aim: To identify associations between clinical symptoms of temporomandibular joint disorders and radiographic findings. Methods: Two hundred four adult patients (156 women, 48 men, mean age 40 years) with temporomandibular joint (TMJ) pain/sounds or changes in mandibular motion were examined according to the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). Bilateral sagittal corrected TMJ tomograms in closed and open positions were assessed for the presence of flattening, erosion, osteophytes, and sclerosis in the joint components and the range of mandibular motion. Logistic regression analyses were performed with the radiographic findings as the dependent variables and the following clinical variables as independent variables: opening pattern, maximal jaw opening, TMJ sounds, number of painful muscle/TMJ sites, duration of pain, presence of arthritic disease, depression and somatization scores, graded chronic pain, and age and gender. Results: Coarse crepitus on opening/closing (odds ratio [OR] ≥ 3.12), on lateral excursions (odds ratio ≥ 4.06), and on protrusion (OR ≥ 5.30) was associated with increased risk of degenerative findings in tomograms. A clinical diagnosis of osteoarthritis increased the risk of radiographic findings (OR ≥ 2.95) and so did increasing age (OR ≥ 1.03 per year) and the female gender (OR ≥ 2.36). Maximal assisted opening and maximal opening without pain (< 40 mm) was associated with a posterior condyle-to-articular tubercle position (OR ≥ 2.60). No other significant associations were observed. Conclusion: Age, gender, and coarse crepitus, but no pain-related variables, were associated with increased risk of degenerative findings in TMJ tomograms. Maximal opening < 40 mm was associated with a posterior condyle-to-articular tubercle relation on opening. [ABSTRACT FROM AUTHOR]

The condylar articular cartilage is a mandibular growth site. As a result, developmental abnormalities at this location manifest as altered growth on the affected side of the condyle, mandibular ramus, mandibular body, and alveolar process. There are many causes of the various growth disturbances and abnormalities of the mandibular condyle and related structures. The authors report an interesting case of unilateral severe condylar hypoplasia secondary to chronic ear infection in childhood. Coronoid hyperplasia was also present on the ipsilateral side. [ABSTRACT FROM AUTHOR]

Objectives: To measure the lengths of the force and resistance arms, in order to calculate the mechanical advantage and muscular work of the human temporalis muscle (TM) in brachyfacial (BR) and dolichofacial (DO) subjects.Setting and Sample Population: Mandibles from 49 subjects of both genders (BR n = 9; DO n = 40) from the collection of the Laboratory of Human Anatomy at Universidade de Santa Cruz do Sul, Rio Grande do Sul, Brazil, were analyzed.Material and Methods: The distance between the condylar process and the coronoid process (insertion site of the TM) represented the length of the force arm (LFA ) of the TM. The distance between the condylar process and the mental protuberance represented the length of the resistance arm (LRA ). Thus, the mechanical advantage of the TM was obtained using the following ratio: LFA /LRA , while the muscular work (LRA /LFA ) of the TM was obtained using the inverse of this ratio.Results: When compared with the DO, the parameters of the BR are significantly greater, as shown by the LFA (6.0%) and mechanical advantage (8.2%; p = 0.0078). By contrast, our results show that in the DO, the LRA was 2.4% longer and the muscular work was 10.4% greater (p = 0.0087).Conclusion: The mechanical advantage of the TM in BR subjects is significantly greater than in DO subjects. Moreover, this greater mechanical advantage may explain, at least in part, the higher incidence of temporomandibular dysfunctions in BR subjects. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Craniomandibular Function is the property of Quintessence Publishing Company Inc. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Interaction between the coronoid processus and the arcus-zygomaticus on contralateral hemi-mandible often drops off the radar in case of distraction osteogenesis of the mandibular corpus. We presented a 42 years old male without any teeth applied to hospital for facial asymmetry, short hemi-mandible and chewing problems. 2D and 3D computerized tomography and stereo-lithographic models were used for planning, predicting possible movements on the contralateral condyle and anticipate the relation of contralateral coronoid process the with zygomatic arc. Maximum safe amounts of distraction were calculated with cooperation with orthodontics and radiology. The rotation angle on the axis of the contralateral condyle is calculated in order to measure the defect to be corrected to take the maxillary and mandibular midlines to the same plane. Total calculated defect were shortened for preventing any interaction between the coronoid processus and the arcuszygomaticus on contralateral hemi-mandible. Patient was satisfied and started to use new dentures two months after removal of the distraction device. In order to achieve successful distraction without any problem regarding to opposite side rotation angles of the condyle, and position changes in the coronoid processus, collaboration and multidisciplinary approach are essential with orthodontics and radiologist in case of unilateral mandibular corpus distraction. [ABSTRACT FROM AUTHOR]

The lower jaw of an unidentified Pennsylvanian (Late Carboniferous) tetrapod from Nova Scotia – the “Parrsboro jaw”- is redescribed in the light of recent tetrapod discoveries and work on evolution of tetrapod mandibular morphology and placed for the first time in a numerical cladistics analysis. All phylogenetic analyses place the jaw in a crownward polytomy of baphetids, temnospondyls, and embolomeres. Several features resemble baphetids and temnospondyls including dermal ornamentation, absence of coronoid teeth, and presence of coronoid shagreen. Dentary dentition is most similar to Baphetes. An adsymphysial toothplate may not preclude temnospondyl affinity. An apparent large exomeckelian fenestra, with the dorsal foraminal margins formed by an unossified element, echoes the morphology of the stem tetrapod Sigournea and is unusually primitive given the other features of the jaw. The jaw may thus provide an example of an intermediate stage in Meckelian element evolution. [ABSTRACT FROM AUTHOR]

Résumé: Nous rapportons la survenue d’une lésion rare chez l’adolescent, non décrite dans la littérature : l’association d’une luxation postéro-médiale du coude, d’une fracture du condyle latéral et du processus coronoïde. Compte tenu de l’irréductibilité de la luxation, le traitement a nécessité une fixation du condyle latéral et du processus coronoïde par un double abord, ainsi qu’une réinsertion capsulaire. Cette lésion, par son caractère instable, ressemble aux terribles triades décrites chez l’adulte. Elle nécessite une stabilisation de la colonne latérale ainsi qu’une fixation du processus coronoïde, qui a un rôle clé dans la stabilisation huméro-ulnaire. La prise en charge de telles lésions du coude est complexe. Elle doit simultanément tenir compte de l’instabilité osseuse, ligamentaire et du risque de lésion des plaques de croissance. [ABSTRACT FROM AUTHOR]

Ectopic eruption of teeth has been reported in mandibular condyle, coronoid process, orbit, maxillary antrum, palate, nasal septum and chin. But an erupted supernumerary nasal tooth is rare. Although asymptomatic in some, a nasal tooth has the potential to cause epistaxis, septal perforation, rhinorrhea and several other complications. It is still rare for a nasal tooth to be associated with Oro-facial-digital syndrome which is a genetic malformation involving oral, facial and digital structures accompanied with varying degrees of mental retardation. The oral and dental manifestations of this syndrome include hypertrophic frenula, lingual hamartomas, ankyloglossia, dental caries, anomalous anterior teeth, enamel hypoplasia, supernumerary teeth and missing teeth. Presented is a case of an erupted tubercular mesiodens in the nasal cavity of a boy aged ten years. To the best of our knowledge, this is the first reported case of a nasal tooth in a child with oro-facial-digital syndrome. Children born with structural anomalies of the face, oral cavity and digits should be thoroughly evaluated to rule out the possibility of syndromes. Moreover, a multidisciplinary approach is required to render the best treatment to the patient. Also, a nasal tooth should be considered a possibility amongst undiagnosed nasal masses. [ABSTRACT FROM AUTHOR]

Abstract: During the past 10 years, more than 20 patients a year have been treated at our centre for bilateral ankylosis of the temporomandibular joint (TMJ). Here we describe the use of computer-assisted three-dimensional surgical planning and its clinical effects in condylar reconstruction for such patients using autogenous coronoid process. Sixteen patients with bilateral bony ankylosis of the TMJ from March 2006 to March 2009 were randomly divided into 2 groups and treated by bilateral osteoarthrectomy and condylar reconstruction by free grafting of autogenous coronoid process with and without three-dimensional simulation using Surgicase CMF™ (Materialise, Belgium) software. Clinical examination, radiographs, photographs, and details of the operation and its outcome were used postoperatively to evaluate the clinical effects of the technique. Satisfactory mouth opening was achieved in all cases. There were fewer postoperative malocclusions among patients who had three-dimensional simulation. The combination of computer-assisted three-dimensional surgical planning and simulation and free grafting of autogenous coronoid process is a sound and predictable method for the reconstruction of condyles in patients with bilateral ankylosis of the TMJ as it makes the operation easier and more accurate. [Copyright &y& Elsevier]

Introduction/Aim. There are numerous factors that influence the formation of condylar processus: the growth and development of cranial base, growth and development of the jaws and alveolar extensions, teething, the way of intercuspidation, the overlap of incisors, functions of masticatory muscles, etc. Considering the fact that the above-mentioned factors significantly differ in persons with different morphological set of the face, we set a hypothesis that dimensions of condylar processus and the mandibular ramus considerably differ in persons with mandibular prognathism compared to eugnatic persons. The aim of this study was to establish the differences in dimensions of condylar processus between the above-mentioned groups. Methods. Six parameters representing the dimensions of the condylar processus were measured on profile teleradiographs of 30 eugnatic persons and 30 paersons with mandibular prognathism: the height of condylar processus, the height of head of the mandible, width of the head, width of the neck, height of the ramus without the condylar processus and the overall height of the ramus. Results. A considerable difference in the values of the parameters was found, as well as the distribution toward the values of reference. It was found that the height of the condylar processus was significantly greater in persons with mandibular prognathism, whereas the width of the head of the mandible, the width of the neck and the height of the ramus without the condylar processus was considerably decreased within the same group. The height of the head of the mandible and the overall height of the ramus was not significantly changed. Conclusion. In persons with mandibular prognathism, morphological features of the condylar processus are changed. The condylar processus lengthens on account of shortening of the lower part of the ramus, and the mentioned lengthening is the most prominent in its condylar neck area which is also the centre of its most intense growth. [ABSTRACT FROM AUTHOR]

Thirty 3-week-old male Wistar rats were grouped into a hard diet control group, a kneaded-diet group, and a powdered-diet group. After 6 weeks of growth, all rats were killed under deep anesthesia. The effects of dietary physical consistency on the mandible were investigated with respect to morphology and bone mineral content using lateral cephalometric analysis and computed X-ray densitometry. Significant differences between the experimental and control groups were determined by measuring the means and standard deviation of the coordinates and differences between 15 points selected on the mandibles. Gonion (Go), which is a measurement of depth to the X-axis, was significantly less in the powdered-diet group, while the kneaded-diet group showed no significant differences. The most posterior point of the coronoid process (Cr) and the most posterior point of condylar process (Cd), which are measures of height to the Y-axis, were less in the kneaded-diet group than in the control group. In the powdered-diet group, Cr, Cd, Go and Infradentale were significantly less than in the control group. On the other hand, the bone mineral content was significantly lower in the coronoid process and angle of mandible in only the powdered-diet group. [ABSTRACT FROM AUTHOR]

This article reports on the vascular architecture of the mandible in humans. The article discusses blood vessels in the mandibular condyle and research on arteries, arterial planes, and capillaries. Information is provided on research conducted on human male cadavers that examined carotid and alveolar arteries, the coronoid process, and the morphology of the mandible.

Ectopic eruption of teeth occurs in a variety of locations. Commonly seen in palate and maxillary sinus, they have also been reported in nasal cavity, orbit, mandibular condyle, coronoid process, and facial skin. Here, we report a rare case of recurrent sinusitis caused by ectopic tooth in right ethmoid sinus and successful endoscopic removal of it. The symptoms of the patient disappeared after surgery. Such case has not been yet reported in the English literature. Ectopic tooth is an uncommon cause of sinusitis. It should be considered in patients presenting with recurrent sinusitis unresponsive to medical treatment. Computed tomography of the sinuses is the modality of choice for diagnosis. Endoscopic sinus surgery is the best method for management of such cases. [ABSTRACT FROM AUTHOR]