Third molar extraction is one of the most common procedures performed in oral and maxillofacial surgery units. It is sometimes accompanied by complications such as alveolar osteitis, secondary infection, hemorrhage, dysesthesia and, most severely, iatrogenic fracture. This article describes two mandibular angle fractures that occurred in two patients during the surgical ...

When mandibular permanent incisors erupt lingually to the corresponding primary tooth, the lingually erupted permanent incisor should be allowed to correct itself. This self correction will usually occur by eight years of age. If the primary incisor is still present at eight years of age, it should be considered overretained. Extraction is indicated. No primary ...

Our aim was to assess the influence of the presence and state of impaction of mandibular third molars on the incidence of fractures of the mandibular angle and condyle. We designed a retrospective study of patients who presented for the treatment of mandibular fractures from January 2006 to April 2011. The independent variables were ...

This paper reports the case of 2 sisters with generalized familial crown resorptions, including co-occurrence of familial dental abnormalities of severe crown resorption, failure of eruption, and congenitally missing teeth, which have not been described earlier in the literature. PMID:21494390

This paper reports the case of 2 sisters with generalized familial crown resorptions, including co-occurrence of familial dental abnormalities of severe crown resorption, failure of eruption, and congenitally missing teeth, which have not been described earlier in the literature.

The reliability of using the oblique cephalometric radiograph for early prediction of the mesiodistal widths of unerupted lower canines and premolars was investigated. Mandibular models and oblique cephalometric radiographs were obtained for 40 Brazilian children (20 boys and 20 girls), in the mixed dentition phase. Further models were obtained for the ...

This paper describes the clinical orthodontic treatment of two cases that were successfully entered for the 2008 intercollegiate MOrth cases prize. The first case describes the management of a 12-year-old female with an increased overjet treated using a Dynamax functional appliance followed by fixed appliances. The second case involves the management of a class II division I malocclusion ...

We describe a case in which a patient with a class II division I incisor relationship on a skeletal II base was transferred midway through a treatment that consisted of aligning the upper and lower arches with fixed appliance orthodontics in preparation for a mandibular advancement osteotomy. The lower second molars had previously been extracted; the lower third molars were ...

Canine transmigration is a rare dental anomaly unique to the mandibular arch, involving intraosseous migration of the unerupted tooth across the midline. Currently, there is a lack of consensus on the definition of transmigration. This report suggests a unified definition of transmigration, that being when a canine has crossed the midline by more than half ...

Recent publications have described a common belief, held in rural areas in Africa, that unerupted primary canines cause diarrhoea, vomiting and fever in infants. To relieve these symptoms a traditional native healer extracts these tooth buds. The emigration of Ethiopian Jews to Israel in 1991 allowed an investigation of this practice among this community. A group of 59 ...

Epidermoid carcinoma and mucoepidermoid carcinoma that arise centrally within the jaws are often associated with dental cysts. Central mucoepidermoid carcinoma of the jaws is rare, and usually presents in the fourth to eighth decades; we know of only 7 cases that have been described in children younger than 16. Here we describe a central mucoepidermoid carcinoma in an 8-year-old girl that arose ...

This article is a case presentation describing a surgical technique for management of an unerupted maxillary incisor. There is a discussion of etiology and of followup. (Author)

Estimating the size of unerupted teeth is an essential aspect of orthodontic diagnosis and treatment planning in the mixed dentition. Three main methods have been used to estimate the mesiodistal crown widths of unerupted canines and premolars: direct measurements on radiographs; calculations from prediction equations and tables; and a combination of ...

A dentigerous cyst is the most common developmental odontogenic cyst. It is a benign and asymptomatic intraosseous lesion that affects the bones of the maxillofacial complex, interfering with tooth eruption. This article reports the spontaneous eruption of a canine after marsupialization of an infected dentigerous cyst and extraction of the deciduous teeth. A radiograph showed a large cyst with a ...

The dentigerous cyst is a developmental odontogenic cyst, accounting for 10% of all cysts of the jaws. The treatment options are decompression, marsupialization, or enucleation regarding the features of the lesions. In this article, a case of a 17-year-old adolescent girl having a large mandibular dentigerous cyst associated with an unerupted third molar ...

Trifid mandibular condyle is an exceptionally rare entity, diagnosed accidentally on radiographic examination. Its etiology is controversial. Dental professionals should have knowledge of this anatomic abnormality and of the problems caused by it in normal function, as well as appropriate treatment modalities. In the literature, only three such cases have ...

Whenever nature diverts from the �normal or usual� it gives rise to something called �abnormal or unusual,� which we call �a Disorder�. Fusion of two teeth is a common developmental disorder that is seen by a clinician. However, bilateral fusion along with Talon's cusp is very rarely seen and reported in literature. This article describes a rare case of the ...

A 22-year-old man presented for orthodontic surgery because of mandibular prognathism. Clinical symptoms suggested acromegaly, and diagnosis was verified by an endocrinologist as well as by radiograph. Bilateral mandibular prognathism often represents the first and most striking physical characteristic of acromegaly; usually, it is also the main reason why ...

Mandibular deformities and malformations are quite various. They are mostly identified by clinical examination, but imaging is very useful for surgical planning. CT imaging is essential to evaluate patients with dystrophies such as fibrous dysplasia, neurofibromatosis, Gorlin syndrome and cherubism. Some growth abnormalities lead to a pseudomalformative ...

This scanning electron micrograph shows a human unerupted third molar tooth surface experimentally coated with Streptococcus sobrinus.

Mesiodens is the most common type of supernumerary tooth found in the premaxilla. It might be discovered by the orthodontist by chance on a radiograph or as the cause of an unerupted maxillary central incisor. The genetic transmission of supernumerary and impacted teeth is poorly understood. The occurrence of identical unerupted maxillary central incisors ...

ObjectiveTo investigate the relationship between radiographic JIA disease course in the TMJs and mandibular growth rotation, compared with growth in healthy individuals.MethodsFrom a larger series of JIA patients followed from childhood to adulthood, 26 were included; 11 without and 15 with bilateral radiographic TMJ involvement. Joint morphology and function were assessed at ...

Liang Bua 1 (LB1) exhibits marked craniofacial and postcranial asymmetries and other indicators of abnormal growth and development. Anomalies aside, 140 cranial features place LB1 within modern human ranges of variation, resembling Australomelanesian populations. Mandibular and dental features of LB1 and LB6/1 either show no substantial deviation from ...

We report a 10-year-old boy with tetramelic limb deficiencies, splenogonadal fusion, and mild mandibular and oral abnormalities. This patient is quite typical of 14 reported cases with this combination of findings. This association must be nosologically closely related to the Hanhart syndrome and other syndromes of limb deficiency and orofacial ...

This study compares the image accuracy of computerized tomography (CT) with that of plain film radiography (PFR) in analyzing the 3-dimensional shape of impacted teeth suspected of being malformed. Eighteen patients with 22 malformed teeth were studied by PFR and CT. Crown shape, root shape, crown/root relationship, and tooth inclination and structure were assessed by PFR and CT. CT was found to ...

The most common abnormality of the lacrimal drainage system is congenital or acquired nasolacrimal duct obstruction. The causes of acquired nasolacrimal duct obstruction may be primary or secondary. The secondary acquired obstructions may result from infection, inflammation, neoplasm, trauma or mechanical causes. The maxillary sinus cysts usually obstruct the nasolacrimal duct ...

The most common abnormality of the lacrimal drainage system is congenital or acquired nasolacrimal duct obstruction. The causes of acquired nasolacrimal duct obstruction may be primary or secondary. The secondary acquired obstructions may result from infection, inflammation, neoplasm, trauma or mechanical causes. The maxillary sinus cysts usually obstruct the nasolacrimal duct ...

Mice lacking both Prx1 and Prx2 display severe abnormalities in the mandible. Our analysis showed that complete loss of Prx gene products leads to growth abnormalities in the mandibular processes evident as early as E10.5 associated with changes in the survival of the mesenchyme in the medial region. Changes in the gene expression in ...

In each of 3 patients referred for computed tomographic examinations of the temporomandibular joint, a gas collection was observed in the inferior space of the joint. The gas was observed on the posterosuperior surface of the mandibular condyle in the open mouth position in each patient. Each of 2 patients had saucer-shaped bone resorption of the ...

We report on 20 individuals in 4 kindreds with auriculo-condylar syndrome (ACS), an autosomal dominant disorder characterized by congenital auricular clefts, mandibular condyle hypoplasia, temporomandibular joint (TMJ) abnormalities, micrognathia, microstomia, and a round facial appearance with prominent cheeks. Affected individuals have varying degrees of ...

The annotation introduces an animal model that may be used for studies involving bone and tooth formation, bone resorption, and bone metabolism. The spontaneous mutation (symbol tl) occurred in Osborne-Mendel derived rats and is characterized by unerupted...

Melnick-Needles syndrome is a congenital syndrome associated with severe architectural disorder of the skeletal system that can cause significant effects on the craniofacial skeleton including the mandible and temporomandibular joint. We report on a case of a young adult patient who experienced chronic dislocation, pain, and dysfunction of her temporomandibular joints related to both a severe bite ...

Loss of teeth results in irreversible alveolar bone resorption, and untreated dental disease causes alveolar bone lysis that ultimately leads to loss of teeth. In addition to anchoring the teeth in the alveolar ridge, the maxillary and mandibular bone allows dental restoration procedures, such as construction of root-supported implants, fixed dentures, or removable dentures. ...

... Descriptors : *TEETH, ETIOLOGY, SURGERY, FACE(ANATOMY), ORTHODONTICS, CELLULOSE, DENTAL PROSTHESES, DENTAL SURGERY. ...

The fate of developing tooth buds located in relation to mandibular fractures was investigated in three infancy cases. Three infants, 2 girls and a boy, aged from 1 year and 5-months old to 2 years and 6-months old, were treated for dislocated mandibular fracture in the symphyseal region by manual reduction and fixation with a thermoforming splint and ...

BackgroundTemporomandibular joint (TMJ) arthritis in children causes alterations in the craniomandibular growth. Resultant abnormalities include; condylar erosions, a posterior mandibular rotation pattern, micrognathia, malocclusion with an anterior open bite, altered joint and muscular function occasionally associated with pain. These alterations may be ...

Accessory patient support equipment was constructed that allows patient positioning for true sagittal projection of the temporomandibular joint using a GE 8800 CT/T scanner. Range of motion abnormalities, osseous alterations of the mandibular condyle and temporal bone, joint-space narrowing, and meniscal configuration may be demonstrated. The technique has ...

Craniofacial fibrous dysplasia occurring in a mother and two of her three daughters is reported. In all three patients, the condition was characterized by extensive bilateral and bimaxillary involvement. All patients exhibited radiographic evidence of abnormal maxillary and mandibular bone and tooth displacement. Morphologic examination of deciduous teeth ...

The improvement in survival and local control rates in children with neoplasms in the head and neck region can be expected to demonstrate increased iatrogenic adverse effects of treatment. The authors report on mandibular growth and developmental abnormalities in 3 children with Hodgkin disease treated by external beam megavoltage therapy. Radiations to ...

Here we describe 5 cases of molar malocclusions in adult pine voles (Microtus pinetorum) used for behavioral endocrinology studies. This species belongs to the subfamily Microtinae, which possess aradicular hypsodont molars. The abnormal molars identified caused apparent difficulty in mastication, resulting in poor body condition necessitating euthanasia. Postmortem ...

While impaction of tooth is widespread, multiple impacted teeth by itself is a rare condition and often found in association with syndromes such as cleidocranial dysplasia or Gardner�s syndrome. A light of radiographic examination, we describe three Turkish young males with multiple impacted teeth who didn�t possess any systemic conditions or syndromes involving both jaws. The first patient, a ...

X-linked hypohidrotic ectodermal dysplasia (XLHED) is a genetic disorder due to a mutation of the EDA gene and is mainly characterized by an impaired formation of hair, teeth and sweat glands, and craniofacial dysmorphologies. Although tooth abnormalities in Tabby (Ta) mutant mice - the murine model of XLHED - have been extensively studied, characterization of the craniofacial ...

X-linked hypohidrotic ectodermal dysplasia (XLHED) is a genetic disorder due to a mutation of the EDA gene and is mainly characterized by an impaired formation of hair, teeth and sweat glands, and craniofacial dysmorphologies. Although tooth abnormalities in Tabby (Ta) mutant mice � the murine model of XLHED � have been extensively studied, characterization of the ...

This paper represents more than 30 years of discussion and collaboration with Drs Joseph Murray and John Mulliken in an attempt to understand growth patterns over time (ie, fourth dimension) in patients with hemifacial microsomia (HFM). This is essential for the development of rational treatment protocols for children and adults with jaw asymmetry. Traditionally, HFM was thought of as a unilateral ...

Thanks to the distraction osteogenesis technique, it is nowadays possible to create new bone in the facial area. Between january 1997 and march 1999 we have performed 20 such procedures, from which 15 were mandibular. We present our experience in 10 patients with this new technique, 5 unilateral and 5 bilateral. Those were 7 boys and 3 girls, aged 2 to 14 years, affected with ...

The aetiology of Proteus syndrome (PS) is yet unclear. This disease includes partial gigantism of the hands and/or feet, nevi, hemihypertrophy due to overgrowth of long bones, subcutaneous tumours, macrocephaly, cranial hyperostosis, and pulmonary and renal abnormalities. This case report is about a 17-year-old boy with two uncommon findings associated with PS: ...

BackgroundMicrognathia is a facial malformation characterized by mandibular hypoplasia and a small, receding chin that fails to maintain the tongue in a forward position. We previously reported a system of prenatal screening that we developed to identify fetuses with compromised central nervous system function by observing fetal behavior. In this paper we report the case of a ...

This case report describes the management of developmental dental alterations in permanent dentition as a consequence of severe intrusive luxation in its predecessors in a child of 2 years. At 10 years of age, this patient was referred for consultation due to lack of permanent maxillary right central and lateral incisors. Radiographic examination revealed impaction of hypoplasic permanent ...

Bilateral sagittal split osteotomy (BSSO) aims to correct congenital or acquired mandibular abnormities. Temporary or permanent neurosensory disturbance is the most frequent complication of BSSO. To evaluate the influence of IAN handling during osteotomy, the authors undertook a prospective study in 290 patients who underwent BSSO. The occurrence and ...

A 78-year-old woman with a history of transient ischemic attacks was found in the doorway of her house in a somnolent and unresponsive condition. In the right mandibular region, a small skin wound was localized, which was surgically treated. Six days after admission to the hospital, an exploratory craniotomy was performed because of abnormal CT findings. ...

Space analysis during the mixed dentition requires prediction of the mesiodistal widths of the unerupted permanent canines and premolars and prediction tables and equations may be used for this purpose. The Tanaka and Johnston prediction equations, which were derived from a North American White sample, is one example which is widely used. This prediction equation may be ...

Enamelin is critical for proper dental enamel formation, and defects in the human enamelin gene cause autosomal dominant amelogenesis imperfecta. We used gene targeting to generate a knock-in mouse carrying a null allele of enamelin (Enam) that has a lacZ reporter gene replacing the Enam translation initiation site and gene sequences through exon 7. Correct targeting of the transgene was ...

Normal and abnormal jaw growth and tooth eruption are topics of great importance for several dental and medical disciplines. Thus far, clinical studies on these topics have used two-dimensional (2D) radiographic techniques. The purpose of the present study was to analyse normal mandibular growth and tooth eruption in three dimensions based on computer ...

It has been maintained that because of large adenoids, nasal breathing is obstructed leading to mouth breathing and an 'adenoid face', characterized by an incompetent lip seal, a narrow upper dental arch, increased anterior face height, a steep mandibular plane angle, and a retrognathic mandible. This development has been explained as occurring by changes in head and tongue ...

... 7 shows the distribution of criteria (diagnoses) placing patients in Class 3. The majority (55.5%) of conversions was due to caries, with unerupted ...

Iatrogenic injury of the inferior alveolar or lingual nerves frequently leads to legal actions for damage and compensation for personal suffering. The masseter inhibitory reflex (MIR) is the most used neurophysiological tool for the functional assessment of the trigeminal mandibular division. Aiming at measuring the MIR sensitivity and specificity, we recorded this reflex ...

Numb chin syndrome (NCS), also known as mental nerve neuropathy, is characterized by facial and oral numbness restricted to the distribution of the mental nerve. Although not a common neuropathy, the clinical importance of this syndrome is its frequent association with malignancies, particularly breast cancer and lymphoma. In this paper, we present a rare case of Burkitt cell acute lymphocytic ...

We describe an infant with frontometaphyseal dysplasia, who presented to us twice for anaesthesia for orthopaedic surgery. These patients have facial asymmetry, mandibular hypoplasia, bradycardia, restrictive lung disease, primary pulmonary hypertension, skeletal abnormalities and difficult endotracheal intubation. The patient also showed laryngeal stridor ...

We report an 8-year-old child with branchio-oculo-facial syndrome. He showed atresia of external ear, preauricular pit, maxillar and mandibular hypoplasia, mild ptosis on the left side, lacrimal duct obstruction, unilateral branchial cyst, hypertrichosis of the neck, left foot showed mild syndactily of fourth and fifth toes and dental abnormalities. His ...

... Abstract : Biting down against a Mandibular Orthopedic Repositioning Appliance (MORA) that properly aligns the temporo mandibular joint (TMJ ...

Fragmented mandibles of two Pleistocene lions (Panthera leo atrox) recovered from Yukon Territory possessed acquired pathological changes and congenital abnormalities, judging from the anatomy of contemporary and modern lions. One specimen showed evidence of chronic periodontitis, an extensive sclerosing osteomyelitis and congenital absence of left lower incisor teeth 1 and 2. ...

Mandibular autopsy specimens were examined with different radiographic techniques in order to evaluate the visibility of the mandibular canal and the measurement accuracy of distances related to the mandibular canal. Hypocycloidal, spiral and computed tom...