Intra-articular partial-thickness rotator cuff tears: analysis of injured and repaired strain behavior.

Background: There are few biomechanical studies regarding partial-thickness rotator cuff tears and subsequent repair.

Hypothesis: Partial-thickness intra-articular supraspinatus tendon tears increase articular-sided tendon strain as they increase in size. Repair of these tears will return strain to the intact state.

Gestational mercury vapor exposure and diet contribute to mercury accumulation in neonatal rats.

Exposure of pregnant Long-Evans rats to elemental mercury (Hg0) vapor resulted in a significant accumulation of Hg in tissues of neonates. Because elevated Hg in neonatal tissues may adversely affect growth and development, we were interested in how rapidly Hg was eliminated from neonatal tissues. Pregnant rats were exposed to 1, 2, or 4 mg Hg0 vapor/m3 or air (controls) for 2 hr/day from gestation day 6 (GD6) through GD15.