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At least 559 records · Page 31Linked to original sources
PubMed1977

Secondary intention post and core.

Methods for restoring existing crown and bridge restorations to normal function following pulp death are reviewed. Endodontic therapy must be supplemental by a reinforcing post-core system if the crown or bridge is to withstand normal functional loads indefinitely.

Crowns↗
PubMed1993

Developmental disturbances of permanent teeth following trauma to the primary dentition.

The topographic relationship of the apices of the primary teeth to the permanent tooth germs explains the potential for possible developmental disturbances of the permanent teeth after injuries to their predecessors. The anatomical, histologic and clinical aspects of permanent tooth malformation following trauma to the primary teeth are described. One hundred and fourteen children with originally 255 traumatized primary teeth have been re-examined (with an average period of 5.1 years after the trauma) to assess any developmental disturbances of the corresponding permanent teeth. Twenty-three per cent of partially or completely erupted permanent teeth showed developmental disturbances. The most frequent malformation was enamel hypoplasia including enamel discoloration and/or enamel defects. The highest prevalence of developmental disturbances of permanent teeth was found after intrusive injuries of primary teeth.

Adolescent↗
PubMed2002

A survey of dental and oral trauma in south-east Queensland during 1998.

BACKGROUND: This project investigated the aetiology of dental and oral trauma in a population in south-east Queensland. The literature shows there is a lack of dental trauma studies which are representative of the general Australian population. METHOD: Twelve suburbs in the south-east district of Queensland were randomly selected according to population density in these suburbs for each 25th percentile. All dental clinics in these suburbs were eligible to participate. Patients presenting with dental and oral trauma were eligible to participate. RESULTS: A total of 197 patients presented with dental/oral trauma over a 12 month period. The age of patients ranged from 1-64 years whilst the most frequently presenting age group was 6-10 years. There was a total of 363 injured teeth with an average of 1.8 injured teeth per patient. Males significantly outnumbered females in the incidence of trauma. CONCLUSIONS: The highest frequency of trauma occurred in the 6-10 year age group. Most injuries in this group occurred while playing or riding bicycles. In the next most prevalent trauma group, 16-20 years, trauma occurred as a result of fighting and playing sport. Overall, males significantly outnumbered females by approximately 1.8:1.0. The majority of injuries in the deciduous dentition were to periodontal tissues. In the secondary dentition most injuries were to hard dental tissue and pulp.

Accidental Falls↗
PubMed2004

Effect of LED curing on microleakage and microhardness of Class V resin-based composite restorations.

BACKGROUND: Polymerisation shrinkage is a critical limitation of dental composites and may contribute to microleakage, postoperative pain, tooth fracture, and secondary caries. It has been shown that curing methods play a significant role in polymerisation shrinkage of light-cured dental resins. The purpose of this study was to investigate the effect of a LED curing light on microleakage as well as microhardness of a dental composite. METHOD: For the microleakage test 32 Class V cavities were prepared in human premolars, conditioned with 35% phosphoric acid and treated with the bonding agent Prime & Bond NT. They were then incrementally filled with the composite Esthet-X and randomly divided into two groups of 16 each. The first group was cured by means of a Spectrum 800 set at 500 mW/cm2 for 40 seconds and the second group with the GC E-Light in standard mode. The specimens were thermo-cycled in a 0.5% basic fuchsin solution, sectioned and evaluated for dye penetration. For the microhardness test two groups of 6 specimens each were exposed using either the LED- or the Halogen curing unit. Vickers microhardness tests were performed immediately after curing as well as 24 hours later, on the top, and at the bottom surface. RESULTS: At the dentine/cementum interface, significantly less microleakage (p=0.004) was found when the restorations were cured with the LED-unit. At the enamel interface no significant difference (p=0.340) in microleakage was found between curing methods. Immediately after exposure significantly harder surfaces were found at the top (p<0.001) as well as at the bottom (p<0.001), using the halogen unit (p<0.05). CONCLUSION: Although a reduction in microleakage could be demonstrated exposing the composite restoration to an LED LCU, an effective microhardness ratio was not achieved.

Bicuspid↗
PubMed2005

Epidemiology of traumatised primary teeth in the west-Mediterranean region of Turkey.

AIM: To investigate the incidence, aetiological factors and results of dental trauma on primary dentition of the children referred to the Süleyman Demirel University, Department of Paedodontics in a two year period. DESIGN: A retrospective study. PARTICIPANTS: Eighty four children (50 boys and 34 girls) with 159 affected deciduous teeth. RESULTS: The incidence of trauma was slightly higher in boys (59.5%). The age of the children ranged from 9 months to 6 years and the peak ages for trauma were 3 years and 5 years of age in respective genders. Falls were the most frequent cause of traumatic dental injuries (29.7%) and luxations were the most common type of trauma with 135 cases (84.9%). The most frequently performed treatment options were examination and follow up only (37.7%). Half of the cases (51.1%) were referred to our clinic in the first week after the trauma occurred. CONCLUSION: The results of this study suggest that a preventive educational programme should be instituted, directed at parents and teachers at nursery schools, in order to inform them about what to do in dental trauma cases and the importance of immediate attendance for dental care.

Age Factors↗
PubMed1985

Dentin-predentin complex and its permeability: pathology and treatment overview.

This review paper focuses attention on tissue changes which may take place in dentin and on localized alterations in tissue formation in the predentin area. A number of reaction patterns has been described in dentin affecting both the inorganic and organic components. Dentinal tubules may become partly or completely obturated by growth of the peritubular dentin. Precipitation of mineral salts within the tubules, which may be a reprecipitation of minerals from adjacent demineralized dentin, represents a fundamentally different mode of obturation of dentinal tubules. Initially, demineralization selectively affects the peritubular dentin. If dentin is exposed to the oral environment, the surface layer may become hypermineralized. The surface layer of dentin, exposed by grinding, becomes covered by a smear layer. Displacement of the contents of the tubules or of the odontoblasts is a characteristic change in the organic components. Odontoblast destruction or degeneration will lead to a lack of, or reduced, predentin formation. Changes in the protein components which lead to alterations in dentin permeability have also been reported. The structure of the interface between dentin and localized formations of irregular secondary dentin varies considerably. If there is no tubular communication between primary and secondary dentin, the interface will act as an impermeable barrier. Changes in dentin, including irregular secondary dentin formation, affect the permeability of the tissue. Such changes are clinically important for the outcome of all types of restorative work performed on vital teeth.

Adult↗
PubMed1987

Dental damage during anaesthesia and surgery.

A review of the Accident Compensation Corporation (ACC) files on dental damage following anaesthesia or surgery was undertaken along with a survey of New Zealand anaesthetists asking about their practice with respect to protection of teeth during anaesthesia. These results confirm that damage is relatively common and that the majority of damaged teeth (62%) were known to have been previously restored, or weakened through periodontal disease prior to the damage occurring. The anaesthetists surveyed thought that dental damage was even more common than shown from the ACC records, and yet the vast majority of them did not routinely use specific protective guards and 45% of them did not ever use protective guards of any type.

Adolescent↗