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At least 109 records · Page 6Linked to original sources
PubMed2000

The mandibular symphysis as a donor site in maxillofacial bone grafting: a quantitative anatomic study.

PURPOSE: The goal of this study was to quantify the amount of bone graft material present in the mandibular symphysis as well as to determine the maximal size of the corticocancellous bone block that can be harvested while avoiding mental nerve injury, tooth injury, and simultaneously preserving the preoperative facial contour. MATERIALS AND METHODS: Sixteen fixed dentate cadaver mandibles were studied. Osteotomies were performed in a monocortical fashion, 5 mm anterior to the mental foramen, cephalad to the inferior border of the mandible, caudal to the expected position of the apices of the anterior teeth, and at the midline. The size of the corticocancellous block was then measured. Bone volume, using 2 techniques, was measured by displacement volumetry. RESULTS: The average volumes obtained were 4.84 mL and 4.71 mL (range, 3.25 to 6.50 mL), respectively, for the 2 techniques of volumetry. The average block size was 20.9 x 9.9 x 6.9 mm; the smallest block was 21.0 x 6.5 x 6.0 mm, and the largest was 25.0 x 13.0 x 9.0 mm. CONCLUSION: Based on the results of this study, it is apparent that the mandibular symphysis can be reliably selected as the harvest site in a variety of oral and maxillofacial reconstructive procedures.

Bone Transplantation↗
PubMed2001

Therapeutic and economic implications of traumatic dental injuries in Denmark: an estimate based on 7549 patients treated at a major trauma centre.

AIM: To analyse the type and extent of injuries presented by patients seeking treatment for traumatic dental injuries at a major trauma centre. Furthermore, to analyse acute and subsequent treatment demands and treatment costs. METHODS: A therapeutic and economic analysis was performed of 7549 patients treated for traumatic dental injuries in a major trauma centre located at the University Hospital in Copenhagen, Denmark. Cases were divided into uncomplicated (concussion, subluxation, enamel and enamel-dentine fractures) and complicated cases (crown fractures with exposed pulps and crown-root fractures, luxation injuries with displacement of the tooth and bone fractures). RESULTS: Primary tooth injuries were found in 2874 patients, involving 5443 teeth, among which 62.8% had complicated injuries. Permanent tooth injuries were found in 4525 patients, involving 10,673 teeth, among which 40.4% had complicated injuries. The cost of treatment (including acute trauma service, follow-up and subsequent restoration) was estimated to be 0.6-1 mill USD a year for the patients treated in this trauma centre. If this figure is transferred to the estimated trauma population in Denmark, a yearly cost of traumatic dental injuries appears to range from 2 to 5 mill USD per 1 mill inhabitants per year according to the treatment scenario. CONCLUSION: Thus, treatment of traumatic dental injuries comprises an expensive part of the health services in Denmark.

Adolescent↗
PubMed1997

Traumatic dental injuries in a cohort of 16-year-olds in northern Sweden.

The prevalence and yearly incidence of traumatic tooth injury between 1 and 16 years of age were studied in a cohort of 16-year-olds, born in 1975, and residing in the County of Västerbotten, northern Sweden. The study comprised 3007 dental records from the public dental health service. The general distribution was 50.3% girls and 49.7% boys. The records showed that 35% of the children on one or more occasions had sustained injury to their primary or permanent dentition. The frequency was nearly twice as high for boys (64%) as for girls (36%). Twenty-five percent of the 16-year-olds had met with tooth injury more than once and this group consisted predominantly of boys. The incidence of injury episodes to primary and permanent teeth was 28 per 1000 per year. The boys had sustained trauma to their teeth most frequently when they were 4 years of age and between the ages of 8 and 11. This was also true for girls at 4 and at 9 years of age, although less evidently so. In the primary dentition, the majority of dental injuries had affected the supporting tissue of the maxillary incisors. In the permanent dentition, 75% of the traumatised teeth were upper incisors. Fractures of varying severity constituted 60% of all registered diagnoses in this dentition, followed by subluxation (19%) and concussion (11%).

Adolescent↗
PubMed2000

Treatment of traumatic dental injuries in a cohort of 16-year-olds in northern Sweden.

The prevalence and yearly incidence of traumatic tooth injury between 1 and 16 years of age have been studied in a cohort of 16-year-olds, born in 1975, and residing in the County of Västerbotten. The study material comprised 3007 dental records from the Public Dental Health Service. Of these, 1040 contained information on dental injuries. Out of 1000 injured primary teeth, 32% were lost, either avulsed at the time of the accident or extracted due to complications. A majority (92%) of the extractions was performed at the first or second follow-up. A total of 690 tooth injury episodes had occurred in the permanent dentition, involving 981 teeth. In 10% of the teeth more than one diagnosis was recorded for the same tooth. 416 restorations were performed due to crown fractures, the majority at the emergency visit. 44% of the patients had to come back one or more times to revise the composite restoration. Complicated fractures or serious luxation injuries constituted only 5% of the total number of injuries in the permanent dentition. 77 (8%) of the traumatised teeth were treated endodontically. Two percent of the teeth with uncomplicated crown fractures required endodontic treatment due to pulp necrosis, while 28% of teeth with a combination of crown fractures and luxation injury were endodontically treated. Out of 6 avulsed incisors, 4 survived after endodontic treatment. A total of 7 incisors were lost as a consequence of the injuries. A specialist treated 4% of the patients.

Adolescent↗
PubMed2004

Mandibular canine tooth luxation injury in a dog.

A mixed breed dog was presented for lateral luxation of the mandibular left canine tooth following oral trauma. This case report describes the management of this injury including reduction, stabilization using a wire reinforced acrylic splint, and standard endodontic therapy of the mandibular left canine tooth.

Animals↗
PubMedDate not supplied

Diagnosis and treatment of dental trauma in a children's hospital.

A comprehensive review of 487 emergency dental trauma visits seen at a children's hospital during a 3-year period was performed to investigate aspects of trauma care that have not been previously reported. Patient characteristics, diagnoses, and injury treatment were analyzed. General patient characteristics and diagnoses were consistent with other studies. Young children were often injured in falls within the home whereas older children were often injured in sports and activities outside the home. The emergency visit was the first contact with the dentist for 80% of children 3.5 years old and younger. Maxillary incisors accounted for 84% of primary tooth injuries: examination and extraction were common treatments. Maxillary incisors accounted for 87% of permanent tooth injuries: bandage restorations and splint placement were frequent treatments. An assistive restraint device was used most often for children 4 years and younger who required extractions. The restraint was used more frequently during clinic hours with support staff present than after hours with a sole provider. Hospital facilities were not essential for treatment of the patients in this study.

Accidental Falls↗
PubMed1994

Dynamic plasticity of dental sensory nerve structure and cytochemistry.

Hypersensitive dentine responds to normal changes in touch or temperature with abnormal pain sensations. This paper reviews studies that have shown dynamic changes in sensory nerve structure, cytochemistry and location after tooth injury, suggesting that those changes contribute to dentine hypersensitivity. Nerve fibres containing calcitonin gene-related peptide (CGRP) are the main type of sensory fibre to innervate dentine. Evidence that many of those dentinal nerve endings originate from small myelinated fibres is presented here. The location of CGRP nerve terminals correlates with the pulpal gradients of nerve growth factor that have been demonstrated in normal teeth by in situ hybridization histochemistry. When shallow cavities are drilled into the outer dentine of rat molars a five-to-eight-fold increase in pulpal nerve growth factor precedes the extensive structural changes in the sensory nerve reactions eventually subside if healing occurs, but both continue if inflammation continues. Evidence correlating pulpal inflammation with long-term changes in central trigeminal pain pathways is reviewed. There can be extensive neuroplasticity after tooth injury, both within dental pain fibres and in central pain pathways. The timing of those alterations of nerve structure, location, and cytochemistry is consistent with their involvement in mechanisms of dentine hypersensitivity.

Animals↗
PubMed1991

[Prevention of orodental injuries in athletic children: let us play!].

Prevention of traumatic tooth injuries during sports practice in children who are particularly at risk due to their dental and maxillary morphology is important when establishing a certificate of aptitude to sport. In some children this may provide an occasion to propose an orthodontal correction for dental protrusion. In any case, fitted protective mouth-pieces made by a competent dental surgeon should be recommended. They are preferable to the commonly available gum shields, which are not secure enough.

Athletic Injuries↗
PubMedDate not supplied

Tooth crown fractures in 3-year-old Andalusian children.

PURPOSE: The purpose of this study was to determine the prevalence of tooth crown fractures affecting primary incisors of 3-year-old Andalusian children. METHODS: Clinicians examined 337 three-year-old children (mean age=3.6 years) of Seville, Andalusia, southern Spain. They examined the children for several dental and oral conditions, including tooth trauma. RESULTS: Crown fractures were found in 15% of the examined children. The prevalence of tooth crown fractures was significantly higher in males (18%) than in females (10%) (P=.04; odds ratio:0.5). In both genders, the upper central incisors had the most fractures, 77% in males and 71% in females. The most common crown fracture was found in enamel only (82%), followed by fracture into dentin (12%), and fracture involving the dental pulp (7%). CONCLUSIONS: Dentists have a responsibility to examine primary tooth injuries at the initial presentation of children because a dental injury to a primary tooth may include more severe injuries, such as dento-alveolar fractures.

Child, Preschool↗
PubMed2000

Traumatic dental injuries and Alpine skiing.

The purpose of this study was to determine the occurrence and type of traumatic dental injuries after maxillofacial injuries as a result of Alpine skiing. During an 8-year period (from January 1991 to December 1998) 7600 patients with facial injuries were registered at the Department of Oral and Maxillofacial Surgery, University of Innsbruck, Austria. Of 784 patients with skiing-related facial injuries (524 males, 260 females) 326 (41.6%) sustained injuries to 639 teeth. The age groups predominantly affected were between 7 and 32 years. Luxation injuries occurred in 338 (53%) teeth, fractures accounted for 270 tooth injuries (42%), and only 35 (5%) were lost at the place of the accident. Of skiers with traumatic dental injuries 58% had concomitant soft tissue injuries, while 23.3% had associated facial bone fractures. The most common causes of injury were falls in 42% (329 patients) and collisions with other persons in 24.1% (189 patients). Being hit by one's own sports equipment (11%) was the third most common cause. Collisions with obstacles accounted for 9% and lift accidents for 5.6% of injuries. The probability of suffering dentoalveolar trauma during skiing varied depending on the injury mechanism. There was a 2-fold risk for dentoalveolar trauma when colliding with objects, a 3.5-fold risk when hit by one's own equipment and a 8.5-fold risk during lift accidents. Dental injuries occurred in about 2% of all injured skiers. Dental health professionals should be aware of the high incidence and the distribution of dental trauma and facial injuries caused by skiing.

Accidental Falls↗
PubMed1991

Anterograde horseradish peroxidase tracing and immunohistochemistry of trigeminal ganglion tooth pulp neurons after dental nerve lesions in the rat.

The peripheral reorganization of pulpal nerves after tooth injury was studied, in the rat, with anterograde horseradish peroxidase tracing techniques, and combined retrograde Fluorogold tracing and immunohistochemistry was employed to examine the effects of inferior alveolar nerve lesions or tooth injury on some cytochemical characteristics of pulpal trigeminal ganglion nerve cells, namely content of substance P, calcitonin gene-related peptide and the ganglioside GM1 (binding subunit of cholera toxin), as well as affinity to RT 97 (antibody to neurofilament protein) and the lectin Griffonia simplicifolia isolectin I-B4. Anterograde horseradish peroxidase tracing demonstrated that pulpal nerves either disappear or reinnervate novel targets after loss of pulpal tissue. There were no obvious signs of neuroma formation. Retrograde Fluorogold labelling with immunohistochemistry showed that after inferior alveolar nerve lesions with subsequent regeneration, a much higher proportion of Fluorogold cells (15%) were substance P-positive compared to normal (2%). In addition, 3% of the cells were Griffonia simplicifolia isolectin I-B4-positive. Such cells were very rare in controls. Proportions of calcitonin gene-related peptide-, GM1- and RT-97-positive cells were normal. After tooth lesions, the proportions of Fluorogold-positive substance P-, Griffonia simplicifolia isolectin I-B4-, GM1- and RT 97-labelled cells were similar to controls, while the proportion of calcitonin gene-related peptide-positive neurons was reduced. The results show that pulpal deafferentation may change the long-term cytochemical characteristics of affected trigeminal ganglion neurons.

Animals↗