Metataxonomics study of dental bioaerosols affected by waterline disinfection.

Background: Microorganisms in dental unit water (DUW) play a significant role in dental bioaerosols. If the methods used to decontaminate DUW also help improve air quality in dental clinics is worth exploring. In this study, we aim to identify the source of bacteria in dental bioaerosols and investigate the impact of waterline disinfectants on the quantity and composition of bacteria in DUW and bioaerosols.

Effect of ionizing radiation on the mechanical properties of current fluoride-releasing materials.

Objectives: This study aimed to evaluate the effect of fractional radiation on the mechanical properties of fluoride-releasing materials.

Materials And Methods: High-viscosity glass ionomer cement (F9), resin-modified glass ionomer cement (F2), glass hybrid restoration (EQ), and bioactive composite (AC) were divided into 3 subgroups: 0, 35, and 70 Gy fractional radiation doses. The specimens were subjected to surface roughness, Vickers microhardness, and compressive strength tests.

Survival rate of recurrent cervical cancer patients.

Objectives: To determine the survival rate of recurrent cervical cancer patients and factors influencing survival.

Material And Method: The subjects were identified from the Gynecologic Oncology Unit tumor registry record The pathological, clinical data including the follow-up information of recurrent cervical cancer patients who were treated in the Gynecologic Oncology Unit, Bangkok Metropolitan Administration Medical College and Vajira Hospital between 1992 and 2003 were retrospective reviewed.

Results: During the study period, 144 recurrent cervical cancer patients were identified.