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At least 829 records · Page 46Linked to original sources
PubMedDate not supplied

Sphenoid sinus chondromyxoid fibroma mimicking a mucocele.

We report the case of a 44-year-old man who presented with a chondromyxoid fibroma (CMF) of the sphenoid sinus, which filled the sinus and clinically and radiologically resembled a mucocele. Chondromyxoid fibromas are the least common cartilaginous neoplasms of bone, typically occurring in the metaphysis of long bones. They have occasionally been described in the facial bones, usually the mandible and maxilla, and rarely involve the paranasal sinuses. Chondromyxoid fibroma displays a relatively unique histological appearance, with characteristic lobulation, with spindle to stellate cells embedded in a myxoid or chondroid matrix. The periphery of the lobules tends to be more cellular than the center. Despite having been described nearly 60 years ago, the histogenesis of CMF remains controversial. Although CMFs are generally regarded as benign neoplasms, they may show an infiltrative pattern and may recur, particularly when they are in locations where complete surgical excision may be difficult or impossible.

Adult↗
PubMedDate not supplied

Solid variant of aneurysmal bone cyst in a patient with cyclic neutropenia.

A 16-year-old female with cyclic neutropenia (CN) was incidentally found to have a thoracic vertebral mass during the preoperative work-up for maxillary sinus surgery. An exploratory thoracotomy revealed a very vascular tumor involving T-10 and T-11 vertebral bodies. Gross total resection of the tumor was achieved. Pathology revealed a solid variant of aneurysmal bone cyst. This is a rare benign neoplasm of bone more commonly seen in the mandible and facial bones as well as involving the small tubular bones of the hands and feet. Because of its rarity, location, and an unknown association with CN, we found this case worthwhile to publish.

Adolescent↗
PubMed1985

[The transfacial flap in surgery of tumors of the middle and posterior 3d of the face and base of the skull. Its use as a means of approach and reconstruction].

A transfacial approach and the use of a bone flap allows exeresis of large tumors of middle and posterior third of face and of base of skull. The procedure can be used alone or associated with a neurosurgical approach to the lesions. This wide surgical approach increases the possibility of a complete excision under conditions of strict hemostasis. Replacement of the bone flap at the end of surgery restores skeletal reliefs ad integrum with excellent esthetic results. The technique is described in detail and several examples of its use outtined.

Adenocarcinoma↗
PubMed2006

[Retrospective analysis of 3,958 patients with facial injuries].

OBJECTIVE: To determine the causes and incidence of facial injuries by an epidemiologic retrospective study. METHODS: A total of 3 958 patients with facial injuries treated at Department of Oral and Maxillofacial Surgery, West China School of Stomatology, Sichuan University from 1955 to 2001 were investigated. Data regarding age, gender, cause of injury, pattern of fracture and associated systemic injuries were reviewed. RESULTS: The male to female ratio of the patients with facial injury was 4.27:1 and 33.4% of patients were aged between 21 and 30 years. The most common cause of injury was traffic accident (30.6%), followed by falls (21.4%) and collision (15.8%). A total of 794 patients (20.1%) showed only soft tissue injuries. 1 100 patients (27.8%) had multiple fractures in facial bones and 2,064 patients (52.1%) had single fracture. The mandibular fracture was most frequently seen, followed by the maxilla and the zygoma. The most common site of mandible fracture was the body (31.2%), followed by the symphysis (22.7%), the condylar (20.5%) and the angle (13.7%). Accompanied injuries to brain and skull happened in 916 patients (23.1%). CONCLUSIONS: Bone fractures were more common in hospitalized patients with facial injuries. The numbers and sites of fracture were related to the causes of injuries and anatomic structure of the bone. The brain and skull injuries, the most often and seriously accompanied injuries, would not be neglected.

Adolescent↗
PubMed2005

A 1-year study of hydroxyapatite-derived biomaterials in an adult sheep model: III. Comparison with autogenous bone graft for facial augmentation.

BACKGROUND: The present study investigates onlay bone grafts and implants in a large-animal (sheep) model to determine whether there are composite biomaterials that can maximize long-term facial augmentation when compared with conventional bone grafts. METHODS: Facial augmentation was performed in 10 adult sheep. First, 16.8 x 5-mm disks were prepared from autogenous calvarial bone, hydroxyapatite ceramic, ceramic composite of 60 percent hydroxyapatite and 40 percent beta-tricalcium phosphate (60 percent hydroxyapatite ceramic), and hydroxyapatite cement paste. Facial recipient sites were the body of the mandible (depository), the maxillary region (resorptive), and the frontal bone (depository). The volume of all bone grafts and implants was determined using computed tomographic scans, and the amount of bone formation was measured by means of backscatter electron microscopy 1 year postimplantation. RESULTS: Cranial bone graft demonstrated a highly significant reduction in volume in all sites studied. Other than a slight decrease in volume of hydroxyapatite cement paste disks applied to the maxillary region, there was no significant change in volume of the biomaterials implanted in any of the remaining recipient sites. Bone replacement was greatest in hydroxyapatite ceramic (23.9 percent) followed by 60 percent hydroxyapatite ceramic (16.4 percent) and least with hydroxyapatite cement paste (4.2 percent). Minimal differences in bone replacement were noted between recipient sites. CONCLUSIONS: This study demonstrates that the volume maintenance of onlay hydroxyapatite composites is highly predictable, whereas that of cranial bone graft is unpredictable. Minimal differences were seen in bone replacement within biomaterials between "depository" and "resorptive" facial recipient sites. Ceramic forms of onlay hydroxyapatite implants demonstrated significantly greater bone replacement than did the cement paste forms of hydroxyapatite.

Animals↗
PubMed2002

[Evaluation of the usefulness of vascularized bone grafts for surgical reconstruction of the face].

The process of healing of vascularised bone grafts was examined clinically and the use of vascularised bone grafts in face reconstruction surgery was assessed basing on author's experience with the surgical technique, availability of graft recipient and donor sites and final outcome. Patients enrolled in this study were treated at the Department of Maxillofacial Surgery, Pomeranian Academy of Medicine in Szczecin, for cancer, injuries, developmental anomalies and atrophic changes. In each case it was necessary to restore facial bone structures of functional and aesthetic importance, including: floor of the orbital cavity, alveolar process of maxilla, palate, malar bone and mandible (Tab. 2). Reconstruction was done mostly with parietal bone grafts pedicled on temporal fascia and muscle, coronoid process of the mandible pedicled on temporal muscle, and lower part of the diaphysis of mandible pedicled on masseter and pterygoid muscles. In some cases, reconstruction material consisted of a rib on greater pectoral muscle, clavicle on sternocleidomastoid muscle and scapular bone crest pedicled on trapezius muscle. Free microvascular flaps with some elements of fibula and radius were used in two patients for the reconstruction of mandible and soft tissues. In total, 41 vascularised grafts were performed in 40 patients. Graft healing was examined clinically and usefulness of this technique for face reconstruction surgery was assessed basing on author's experience with the preparation technique, intraoperative complications and extent of trauma to donor sites. The results of healing of specific grafts are enclosed in Table 1. The surgical technique for graft preparation and its transfer into the recipient site varied from case to case. The most difficult and effortful approach was with free bone grafts transferred from remote sites by means of a microsurgical technique (group V). Despite the complexity of the reconstruction method, no intraoperative complications occurred in the course of preparation of the radial and fibular bone grafts. In group IV, the most difficult grafts included those taken from ribs, clavicle and scapular bone. Parietal bone grafts were much less troublesome (subgroups Ia and Ib) although associated with the largest number of intraoperative complications. The easiest preparation method applied to the grafting of coronoid process and lower part of the body of mandible (group II and III). Clinical evaluation of vascularised bone grafts confirmed without reservations the value of this approach in face reconstruction surgery. However, the extent to which individual graft types proved to be usable varied. The most valuable ones included parietal bone grafts pedicled on temporal muscle and fascia used for restoring upper and central facial structures and the coronoid process of mandible pedicled on temporal muscle used for reconstructing the floor of the orbital cavity and alveolar process of the maxilla. Rib grafts pedicled on pectoral muscle were of limited use. The same applies to grafts from the lower part of the body of mandible pedicled on masseter and pterygoid muscles occasionally used for restoring the mental part of mandible. Grafts from remote sites (fibula, radius) should be used only when other reconstruction methods are unavailable.

Bone Transplantation↗
PubMed1979

Clinical and experimental correlations in temporal bone fracture: the facial nerve.

In this review of 50 patients with fracture of the temporal bone, 11 patients had ipsilateral facial paralysis, three of immediate and eight of delayed onset. Eight patients with complete paralysis of the facial nerve had facial nerve decompression; six of these had incomplete return of function. Only one patient with a delayed complete facial paralysis had complete return of function. The poor functional results in patients with delayed complete facial paralysis due to temporal bone fracture encourage facial nerve decompression in all stable patients with the complete facial paralysis of temporal bone fracture.

Adult↗
PubMed2006

Motorcycle-related maxillofacial injuries among Nigerian intracity road users.

PURPOSE: We sought to determine the etiology and pattern of motorcycle-related maxillofacial injuries among intracity road users in Nigeria. PATIENTS AND METHODS: We conducted a prospective review of all patients presenting at the maxillofacial surgery units of the Obafemi Awolowo University Teaching Hospital Ile-Ife and Usmanu Dan Fodiyo University Teaching Hospital Sokoto with motorcycle-related injuries. RESULTS: One hundred seven patients were included in the study. A significant male preponderance was observed (P = .002). Overall, the peak age incidence was 20 to 29 years, whereas female patients had a peak age incidence of 10 to 19 years. Victims were mostly riders (50.5%) but none of them was a female. While 8.4% of accidents occurred on motorcycles with more than one pillion passenger, none of the victims reported using a crash helmet. Mechanism of accident was mostly head-on collision (39.2%). The injuries sustained were predominantly soft tissue injuries or in combination with bone injury. Bone and dental injuries were attributed mostly to falls. Facial bone injuries occurred mostly in the mandible (64 of 104). A symmetric distribution of injuries was observed in the upper, middle, and lower thirds of the face, but the middle third had the highest injury sites while the upper third had the least. CONCLUSIONS: Motorcycle-related maxillofacial injuries among Nigerians affect males predominantly. The injuries sustained have a symmetric distribution and were mostly soft tissue injuries in isolation or in combination with bony injuries. The middle third of the face is most vulnerable. Mandatory use of safety helmets and education of cyclists on the appropriate number of pillion passengers are imperative to minimize the morbidity and mortality associated with motorcycle accidents.

Accidents, Traffic↗
PubMed2000

How orthodontic functional appliances work.

Orthodontic functional appliances are an essential part of an orthodontist's armamentarium. The amount of their use varies greatly, some feeling they have limited use with minor effects, others claiming dramatic changes in facial growth and appearance, without significant genetic constraints. The evidence on clinical use is not equivocal, the general results however not showing an unlimited amount of skeletal change, but rather a balance of change in the growth of the facial bones and dentition with clinically significant changes in the facial soft tissues. This article examines the current evidence.

Adolescent↗
PubMed1999

The circumstances and scope for prevention of maxillofacial injuries in cyclists.

A prospective study of cyclists with maxillofacial injuries attending Accident and Emergency departments in South Wales was carried out over a 12 month period. 65% of the 104 accident victims were aged under 14 years, and 81% were male. Only 14% were wearing helmets. Injuries were mapped to 9 facial zones. Nearly half the victims sustained injury to the central facial zone. There was an association between head injury (HI) and the location of impact on the face (p < 0.0001 Chi-square = 41 df = 8), the nature of the accident (p < 0.012 Chi-square = 10.9 df = 3), and type of injury in the impact zone (p < 0.007 Chi-square = 13.4 df = 4). More patients with facial injuries but without facial bone fractures sustained HIs than those with fractures. The facial skeleton may protect the brain by absorbing impact. The high incidence of midface injuries could be reduced by incorporating a facebar in helmet design.

Adolescent↗
PubMedDate not supplied

[The para-clinic investigation of temporo-mandibular joint changes in patients with acromegaly].

The Acromegaly is an endocrinological disease determined by the hypersecretion of STH in a certain period of the body evolution and it causes the hypertrophy of bones in general and of mandible and cranio-facial bones, determining a disorder due to this development of bones, associated with troubles in the activity of muscles and of the phospho-calcium metabolism. This study was made on a group of 33 acromegaly patients. Their temporo-mandibular joint was investigated by ortopantomography, tomography, computer tomography and scintigraphy. All of these exams shows the changes in temporo-mandibular joint due to the cells hyperactivity determined by the hypersecretion of STH.

Acromegaly↗
PubMed1978

[Retention of shape and function after jaw bone resection for tumor surgery].

Maintenance of form and function after resection of facial bones is of the utmost psychological importance. The potentialities for immediate rehabilitation are demonstrated. Defects in the maxilla are primarily closed by obturators, which must support the soft tissues of the orbit and the cheek, close the defect in the maxilla and restore masticatory function. Secondary reconstruction with split rib grafts is possible even after hemimaxillectomy. In the lower jaw, primary reconstruction with bone grafts at the same time as the resection is the most favourable course. Should the quality or quantity of soft tissues be inadequate, the defect is temporarily bridged with implants which can be replaced later with bone transplants. In all cases adequate mouth opening must be secured and deviation of the mandibular stumps avoided.

Female↗