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Results for “Nasal Bone”

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At least 19 recordsLinked to original sources
PubMed1996

Optimizing bone-graft nasal reconstruction: a study of nasal bone shape and thickness.

Nasal reconstruction may best be carried out with bone grafting in certain cases of loss of structural support. In order to optimize both the aesthetic and functional results of bone-graft nasal reconstruction, we studied the shape and thickness of the normal human nasal bone. Sixty Caucasian skull nasal bones were measured by width throughout their length at three planes of depth. Seventeen Caucasian cadaver nasal bones were examined to determine the thickness of the bone throughout its length at three sagittal planes. The results showed that the nasal bone was widest at the nasofrontal suture (14 mm), narrowest at the nasofrontal angle (10 mm), and then widened again to a maximum width of 12 mm about 9 to 12 mm inferior to the nasofrontal angle. The nasal bone was thickest superiorly at the nasofrontal angle (average 6 mm) and progressively thinned toward the tip. It was 3 to 4 mm thick in the critical area where screws are most commonly placed for fixation (5 to 10 mm inferior to the nasofrontal angle). From these data, three-dimensional models of the normal nasal bone shape were formulated and used in clinical bone-graft cases.

Bone Transplantation↗
PubMed2004

[Giant cell reparative granuloma of temporal bone and nasal bone].

OBJECTIVE: To discuss the etiology, typing, diagnosis, differential diagnosis and treatment of GCRG. ative granuloma (GCRG). METHOD: Two GCRG of temporal bone and nasal bone were analyzed. RESULT & CONCLUSION: GCRG is not a real neoplasm, it is very difficult to diagnose. Total surgical resection is an effective therapeutic method, the follow-up survey after surgery should be enhanced. For the recurrent cases, radiation therapy and anti-angiogenic therapy can be considered.

Child↗
PubMed2003

[Replacement of nasal bone fracture under nasal endoscope].

OBJECTIVE: To explore the possibility of replacement of nasal bone fracture under nasal endoscope. METHOD: Twenty-five cases suffered from nasal bone fracture were examined by nasal endoscope, had the nasal bone subside anesthetized, and were operated on replacement of nasal bone fracture in the recumbent position. RESULT: Twenty-five cases were observed nasal bone shift towards the back and 4 cases were accompanied by fracture of nasal septum. It had good effect of local anesthesia. We accurately placed the implement under nasal bone subside by direct view and cured the fracture of nasal septum at the same time. CONCLUSION: It is the advantage for replacement of nasal bone fracture under nasal endoscope to overall evaluate the state of nasal bone fracture, have good effect of anesthesia, replace accurately and make little injury in nasal cavity.

Adolescent↗
PubMed1994

The utility of nasal bone radiographs in nasal trauma.

A prospective study was performed to assess the value of nasal bone radiographs taken in the accident and emergency department. The study population consisted of 100 consecutive patients who had nasal bone radiographs in our accident and emergency (A&E) department following trauma. We looked at the casualty officers', radiologists' and ENT surgeons' assessment of the cases. Thirty months later we reviewed the patients' notes to identify the number who sought medico-legal reports on their injury in that interval. We found sporting injuries to be the commonest mechanism of injury, followed closely by accidental falls. The remaining third was made up predominantly of cases of personal assault and road traffic accidents. Only two patients had a naso-pharyngeal history recorded on their visit to A&E. Thirty-five patients were referred to ENT out-patients, only 24 kept their appointment. Thirty-one of the 35 ENT referrals were felt to have a fracture demonstrated on their radiographs. However, 19 of those discharged were also thought to have an X-ray-proven fracture. Thirty months later only two patients had requested a medico-legal report. We demonstrate that the decisions regarding treatment of nasal trauma are based on clinical findings and that nasal bone radiography has no place in the decision making process and should therefore be abandoned.

Adolescent↗
PubMed2004

Septal fracture in simple nasal bone fracture.

SUMMARY: Nasal bone fractures are the most common type of facial fractures. Previous studies have shown that most nasal fractures involve the septum, which can provide an obstacle to the successful reduction of nasal bone fractures. In particular, septal fractures in combination with simple nasal bone fractures are usually unrecognized and untreated at the time of injury. Furthermore, systemized treatment protocols and diagnostic tools for septal fractures in the case of simple nasal bone fracture have not previously been presented. In this study, the clinical findings of septal fractures in cases of simple nasal bone fracture were correlated with symptoms, signs, and computed tomography findings and assessed statistically. The patterns of septal fractures in simple nasal bone fractures were assessed by direct vision via hemitransfixion incision. Of the 52 patients with simple nasal bone fracture who presented over a 3-year period and were included in this study, 10 were female and 42 were male, with an average age of 33.8 years (age range, 18 to 61 years). Fifty of these patients (96.2 percent) showed septal fractures, and septoplasty or submucosal resection was performed on 41 patients (78.8 percent) who manifested severe septal fractures of perioperative septal grade 3 or higher. Closed reduction of the nasal bone fracture only was performed on the remaining 11 patients. Among the signs evident at physical examination, mucosal tearing was found to be statistically significant for septal fracture. Computed tomography was found to be very helpful in diagnosing septal fracture but could not predict its severity accurately (Spearman correlation coefficient between computed tomography septal grading and perioperative septal grading, 33.5 percent). Therefore, computed tomography could not be used as a definitive diagnostic modality for septal fractures in terms of deciding whether septoplasty or submucous resection was needed. It is evident that septal fractures are frequent in simple nasal bone fractures that are not combined with other facial bone fractures. This study confirms that there are differences between radiologic findings and perioperative findings. To reduce the incidence of posttraumatic nasal deformity, meticulous physical examinations with subsequent septoplasty or submucosal resection are needed in the treatment of simple nasal bone fracture.

Adolescent↗
PubMed1997

Pedicled bone grafts to treat nasal bone defects associated with full-thickness loss of nose.

A periosteal pedicled bone graft from the maxillary buttress was used to reconstruct nasal bone loss with full-thickness dorsal nasal skin loss after a nasomaxillary skin graft inlay. The covering defect and lining defect were reconstructed using a forehead flap and a nasolabial flap. The vascularity of the bone flap was confirmed by bone scintigraphy on the seventh postoperative day. The results obtained were satisfactory and the framework was found to be stable during the follow-up period.

Bone Transplantation↗
PubMed1977

Hypoplasia of the nasal bones.

A case of nasal bone hypoplasia is presented. It resulted in mild respiratory obstruction due to collapse of overlying soft tissue on inspiration. A brief note on the growth of the nasal bones is made. All previously reported cases, which could be found in the literature, on absence or hypoplasia of nasal bones have been reviewed. A number of possible conditions which could result in loss of the nasal bone is discussed.

Adolescent↗
PubMed2006

Foreign body mimicking a nasal bone fracture.

Nasal foreign bodies are common in young children and are typically the result of intranasal placement by the child. The authors report a case of an extranasal foreign body in an adult, which presented as a nasal fracture following trauma to the nose. This uncommon presentation, previously unreported in the literature, highlights the importance of careful history taking in cases of nasal trauma and of thorough wound exploration if any penetrative injury is found.

Adult↗
PubMed2005

First-trimester screening for trisomy-21 using a simplified method to assess the presence or absence of the fetal nasal bone.

OBJECTIVE: To determine the benefit of including nasal bone assessment in addition to standard first-trimester markers (nuchal translucency, free beta human chorionic gonadotropin and pregnancy-associated plasma protein A) as a screening test for Down syndrome, using a strict criterion for classification of nasal bone absence. STUDY DESIGN: Nasal bone assessment was conducted in 2411 patients with crown-rump length between 45 and 84 mm, including 15 patients with Down syndrome. A patient was considered to have an absent nasal bone only if there was no evidence of present nasal bone. Unlike other studies, nasal bone was classified as present when there was evidence of a thin echogenic line under the skin. Simulation studies were conducted to assess the detection rate and false-positive rate of a combined first-trimester screening protocol including nasal bone assessment. RESULTS: There were 9 of 2396 (0.4%) unaffected cases with absent nasal bone (95% confidence interval 0.2%, 0.7%) and 8 of 15 (53.3%) Down syndrome cases (95% confidence interval 26.6%, 78.7%). Using a 1 in 250 risk cut-off, the detection rate of standard first-trimester screening was 87%, with a false-positive rate of 4.3%. Incorporating nasal bone measurement improved the detection rate of Down syndrome to 90% and reduced the false-positive rate to 2.5%. CONCLUSION: The use of a strict criterion to determine nasal bone absence leads to fewer cases classified as absent and may simplify the implementation of nasal bone as a marker for first-trimester screening, resulting in lower false-positives and higher detection, compared with other current screening protocols.

Adult↗
PubMed2003

A histological and radiological investigation of the nasal bone in fetuses with Down syndrome.

OBJECTIVES: Previous studies of nasal bone development in Down syndrome have used radiographs or ultrasound for the detection of nasal bone length or nasal bone absence. The aim of this study was to investigate the presence and size of the nasal bones in postmortem Down syndrome fetuses by means of radiographs and histological examination. METHODS: Thirty-three aborted human fetuses (gestational age 14-25 weeks) with Down syndrome were included. A mid-sagittal tissue block was excised from the skull base to the foramen magnum and along the lateral aspect of the spine. Radiographs of the tissue block were taken in lateral, frontal and axial projections. The length of the nasal bone was measured. The tissue blocks were cut in serial sections and stained. The crown-rump length (CRL), foot length (FL) and number of ossified bones in the hand and foot (CNO) were recorded. RESULTS: A total of 8/33 fetuses had bilateral nasal bone absence and two had unilateral absence. In fetuses with radiographically diagnosed nasal bone absence, no nasal bone could be found histologically. The majority of the Down syndrome fetuses had CRL, FL and CNO values within the range of those for normal age-matched fetuses. Nasal bone length was normal or reduced. CONCLUSIONS: Absence of the nasal bone was registered by postmortem examination in one-third of fetuses with Down syndrome. In some fetuses this could be a result of delayed maturation associated with Down syndrome. The phenotypic differences in nasal bone appearance may reflect genotypic differences in the Down syndrome group.

Autopsy↗
PubMed1993

Congenital absence of nasal bones.

Isolated congenital nasal malformation is rare; the isolated absence of any specific nasal structure is even rarer. They are related to craniofacial stenosis syndromes and to facial cleft, which are described in Tessier classification; also they can appear in 58 complex genetic syndromes. Nasal malformations may be acquired as a consequence of traumas, tumors, infectious diseases, or sequelae of aesthetic surgery. Gorham's syndrome is a rare disease that produces spontaneous and asymptomatic disappearance of any bone of the skeleton. In the world literature, there is no case of Gorham's syndrome with disappearance of the nasal bones. This case report is of a 20-year-old patient who sought correction of an aesthetic defect produced by a cartilaginous hump without the presence of the nasal bones. The absence of both nasal bones is produced by failure of the development of both centers of ossification. Through study of embryological development of the nasal structure, isolated absence of the nasal bones can be explained.

Adult↗
PubMed2003

[Cavernous hemangioma of the nasal bones].

Cavernous hemangioma of the nasal bones is a rare benign tumor. 31 cases have been published in the world literature. The tumor appears as a firm swelling involving the nasal bone, adjacent tissues are uninvolved. The CT scan is helpful in defining tumor characteristics and extent. In most cases surgery appears curative without major cosmetic deformation. We present a case of nasal bones hemangioma where a coronal flap approach was used for tumor resection and cranial bone grafts for reconstruction.

Aged↗
PubMed1994

Nasal bones and pyriform apertures in blacks.

The nasal bones and pyriform apertures of 20 skulls were measured for length and width. There were 6 skulls from the Ashanti tribe in West Africa, 5 black American skulls, 5 skulls from Austria in northern Europe, and 4 American Indian skulls. The nasal bones were measured for length and width at the narrowest and widest portions and the pyriform apertures were measured for height and for width at the base, the mid section, and near the apex at the nasomaxillary suture line. The Ashanti nasal bones were the shortest with a length of 2.18 cm. They were the narrowest with mean widths of 0.47 and 0.83 cm. The Austrian nasal bones were the longest (mean, 3.02 cm). The mean widths were 0.68 and 1.11 cm. The Indian nasal bones had a mean height of 3.0 cm and were the widest with mean widths of 0.61 and 1.28 cm. The measurements of the American black nasal bones fell between the Ashanti on the one hand, and the Austrian and Indian on the other, with a mean height of 2.79 cm and mean widths of 0.49 and 1.03 cm, reflecting the triethnic origin. The pyriform aperture in the Ashanti was oval whereas the white and Indian pyriform apertures were triangular. The black American pyriform apertures varied from oval to triangular, also reflecting the triethnic origin. The clinical implication of these differences in black rhinoplasty are discussed.

Adult↗
PubMed2002

Accurate, firm stabilization using external pins: a proposal for closed reduction of unfavorable nasal bone fractures and their simple classification.

Nasal bone fractures are the most common among facial fractures and are the third most common fractures in the human frame. Although many forms of treatment have been introduced, controversy regarding the optimal treatment still remains. Nasal bone fractures are complex, with significantly varying types that are often undermanaged in closed reduction procedures. The authors' experiences with nasal bone fractures have shown that the baseline for surgical intervention depends on the type of fracture and the method of maintenance after reduction, both of which have considerable impact on the final result. Therefore, it is very important and challenging to determine the proper method of reduction and maintenance. The periosteal covering plays an important role in the splinting action after closed reduction, but sagging, depression, and instability remain major complications in some cases. The authors devised a new method of accurate, firm stabilization of the fractured nasal bone by using external pins in those unfavorable fractures determined radiologically to gain optimal reduction and fixation. In the present study, fractures were grouped into favorable and unfavorable fractures, the latter being those that remained unstable or impacted even after reduction and thus needed open reduction. Unfavorable fractures were divided into four subclasses according to radiologic findings: (1) type I (frontal), including chip or tip fractures, which often depress the upper lateral cartilage and tend to sag after reduction; (2) type II (lateral), or laterally depressed segmental fractures with a lateral shift of the arch in fragments or as a unit; (3) type III (mixed), or type II with septal involvement; and (4) type IV (complex), including open or multiple comminuted fractures. After an initial evaluation to determine the fracture type, closed reduction and external fixation were performed for types I, II, and III fractures and open reduction was performed for type IV fractures 5 to 7 days after the fracture. Closed reduction with the use of external pins was done in eight cases: type I (two), type II (four), and type III (two). The mean age of the patients was 27.8 years, and the average follow-up period was 11.7 months. Functional and aesthetic results were satisfactory. This new method for support and fixation is an alternative to the conventional closed reduction and a promising way to prevent secondary deformity.

Adolescent↗