Bonded sealants for fractured teeth.

Dental fractures in veterinary patients are relatively common. Historically, very little treatment has been provided for these fractures. Because of the relatively thin layer of enamel present in canine and feline dentition, most fractures result in exposure of dentin and/or pulp. This article discusses the rationale and procedure for treatment of exposed dentin in vital (live) teeth. Correct case selection and treatment improve patient comfort and help decrease the chance of future endodontic involvement in these teeth. This procedure may be considered an entry-level restorative procedure. Once mastered, the materials and principles will allow the practitioner to branch into more sophisticated restorative procedures, such as composite restorations, auto-incline planes, and restoration of endodontic access sites.

Reattachment of tooth fragment: an in vitro study.

Canine tooth fracture is common in dogs. Application of an esthetic and durable restoration may be challenging in veterinary dental practice. This study used traditional human dental laboratory methods to evaluate fracture strength of intact dog canine teeth and fractured teeth that had been restored by reattachment of the tooth fragment. The results showed that the teeth restored by reattachment of the tooth fragment supported a test load equal to 45.4 % of the load necessary to fracture intact canine teeth.

[Adhesively cemented full-cast metal crowns on traumatized canine teeth in working dogs]. / Resultaten van adhesief gecementeerde metalen kronen op getrau- matiseerde hoektanden bij werkhonden.

In this retrospective study, 58 metal crowns were placed in 35 guard dogs with fractured or severely worn canines. All animals could resume their work after treatment. Only three metal crowns came off (5%) and two metal crowns were lost for unknown reasons. At a later stage, six canine teeth (100%) broke off underneath the crown during dog training. The success rate of this procedure in our clinic was therefore 81% (47/58). A significant correlation was found between the height of the tooth stump and the loss of the crown. Recommendations for further research were made.

Evaluation of the clinical performance and effectiveness of adhesively-bonded metal crowns on damaged canine teeth of working dogs over a two- to 52-month period.

In this clinical study, 41 metal full crown restorations of canine teeth were placed in 18 working dogs. Twenty-six canine teeth had severe attrition with no involvement of the pulp cavities; 15 fractured canine teeth were endodontically treated. With the exception of one tooth, at least one-third of the coronal part of each canine tooth was available for a supragingivally performed, minimal tooth crown preparation. A dental resin luting cement technique was used to bond the electrolytically etched crown (made from an alloy of cobalt-chrome-molybdenum) to the tooth. The metal crowns were slightly shorter and with a more rounded tip than the original tooth. Posts or post-and-core techniques were not used. Median follow-up period was 30 months (range 2 to 61 months), at which time 36 crowns were found to be intact and functional. Five crowns were lost; three as a result of subsequent injury and fracture of the tooth below the crown; one as a result of use of less than one-third of the coronal portion of the tooth for retention of the crown; and one as a result of an oblique fracture of the root.

Colagem de "brackets" ortodônticos metálicos com dyract em esmalte bovino: resistência ao cisalhamento em funçäo do uso ou näo de condicionamento ácido e de "primer" / The metallic orthodontic bracket bonding with Dyract in bovine enamel the shear bond strength with or without acid conditioning \"Primer\"

O objetivo deste trabalho foi avaliar a resistência ao cisalhamento da colagem de brackets ortodônticos metálicos com o compômero Dyract (De Trey - Dentsply) em esmalte bovino, com condicionamento ácido seguido ou näo de Primer PSA (respectivamente os grupos A e B), ou sem condicionamento ácido seguido ou näo de Primer PSA (respectivamente os grupos C e D). Nas quatro situaçöes (grupos A, B, C e D), os brackets foram colados de acordo com a maneira convencional. Os resultados relativos à resistência ao cisalhamento em kgf/cm2 foram: grupo A, 108,24; grupo B, 78,04; grupo C, 98,51; e grupo D, 21,93. Conclusäo: houve diferença estatística entre os grupos; exceto entre os grupos A e C

Long-term success rate of resin-bonded metal crowns on the canine teeth of working dogs.

In this clinical study, 19 full metal crown restorations of canine teeth were placed in seven working dogs. Thirteen canine teeth were severely abraded with no involvement of the pulp cavities; six fractured canine teeth were endodontically treated. At least 1/3 of the coronal part of the canine tooth was available for a supragingivally performed, minimal tooth crown preparation. An adhesive technique to bond the electrolytically etched crown (an alloy of cobalt-chrome-molybdenum) to the tooth was used. The metal crowns, slightly shorter and with a rounder tip than the original tooth, were bounded to the enamel and dentine by using a resin luting cement. Posts or post-and-core techniques were not used. Mean follow-up period was 32 months (range 24-52 months), at which stage 17 crowns were found to be intact and functional. Two crowns were lost as a result of trauma resulting in a fracture of the tooth below the crown.