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J R Jedrychowski

Publications and source records attributed to J R Jedrychowski.

25 records · Page 2Linked to original sources
PubMedDate not supplied

Practice characteristics of dual trained pediatric dentistry and orthodontic specialists.

Most respondents to this survey are providing both pediatric dental and orthodontic services to their patients. Almost half of the respondents reported that both specialties are fully integrated without separate times or days. Patient treatment time was reported as 41 percent pediatric dental services and 59 percent orthodontic services; when asked how they would like to adjust patient treatment time in ten years, however, the response was 20 percent pediatric dentistry and 73 percent orthodontics. A high percentage of respondents (44 percent) were involved in teaching full or part time or in continuing education courses.

Canada↗
PubMedDate not supplied

Bond strength of light-cured glass ionomers to carious primary dentin.

The pre-cooperative or handicapped child with decay presents a special challenge to the practitioner and may require sedation or general anesthesia. Treatment with an interim restoration may delay treatment until the child is more mature and can accept dental treatment and is a more conservative approach than sedation, extractions or general anesthesia. Glass ionomer materials have been utilized for this application, but little is known about their retention to carious dentin. The purpose of this study was to determine whether the presence of artificial dentin decay will affect the shear bond strength of two light-cured glass ionomer materials. VariGlass and Vitrebond glass ionomer materials were attached to carious and non-carious primary dentin surfaces and bond strengths determined. There were no significant differences in shear bond strengths between the decayed and non-decayed surfaces [p < or = .001]. VariGlass had higher shear bond strengths than Vitrebond only after a pre-treatment with the PAA containing liquid. Pre-treatment with the liquid provided with each light-cured glass ionomer was beneficial in all instances except for Vitrebond on non-decayed surfaces.

Acid Etching, Dental↗
PubMedDate not supplied

Shrinkage stresses associated with incremental composite filling techniques.

It is commonly accepted that stresses associated with polymerization shrinkage of composite restoratives can be reduced by utilization of an incremental filling procedure. A recent report using finite element analysis on a simple box preparation has shown that such a procedure actually produces higher stresses. The purpose of this investigation was to visualize the stresses generated by composite resin placed into photoelastic models of two surface preparations using different incremental techniques. Primary molar preparations were cast life-sized in a photoelastic material. Cavity walls were cleansed, primed and coated with unfilled resin. Incremental filling techniques of a hybrid composite resin were gingivo-occlusal, oblique, and facio-lingual. Comparisons were made with the bulk placement technique. The stresses developed within the model teeth were observed in the field of a circular polariscope under magnification. Generally few differences in shrinkage-induced stresses, were observed between the incremental filling techniques tested. The lowest shrinkage stresses were generated by the bulk placement technique.

Birefringence↗