An isolate of Chlamydia psittaci from ovine pneumonia produced extensive pneumonia in red deer after endobronchial inoculation. Associated clinical signs lasting for several days included pyrexia, inappetance, increased pulse and respiration rate, and physical distress after handling, but no coughing or upper respiratory symptoms. Histologically, an acute exudative reaction was present after two days, and an early proliferative response after seven days. Both the clinical and pathological responses were more marked than those usually associated with chlamydial pneumonia in other large animals after endobronchial infection. A small survey for chlamydial antibody in wild red deer was negative.

Animals↗

PubMedDate not supplied

Increases in cavity volume associated with the removal of class 2 amalgam and composite restorations.

Removal of amalgam restorations from class 2 cavities has been shown to cause increases in cavity volume. The aim of this study was to test whether the removal of composite resin from class 2 cavities was associated with greater increases in cavity volume compared to that produced during removal of amalgam. Class 2 cavities were prepared in previously extracted human molar teeth and the cavity volumes calculated. The teeth were restored with either amalgam or a composite resin and appropriate dentin bonding agent (APH/Optibond). Two dentists removed the restorations, and the resultant cavity volumes were calculated. The results were analyzed using a standard t-test, ANOVA, and a Scheffe F-test. Removal of composite from class 2 cavities resulted in significantly increased cavity volumes compared to that when amalgam was removed. While there was significant interoperator difference in cavity volumes following removal of amalgam from class 2 cavities, there was no significant interoperator difference in cavity volumes following the removal of composite. These differences were related to the methods used to eliminate the restorations from the cavities.

Analysis of Variance↗