Add a few squirts of mild dish soap. Scrub the patio with a long-handled scrub brush and the soapy water. Rinse the soap off with water from the garden hose. Cover plants, grass and landscaping around the concrete slab with plastic sheeting if it is still dirty or stained.
When pseudarthrosis is caused by or results in a positive sagittal-plane deformity, correction is essential. This can be accomplished by lengthening the anterior column, shortening the posterior column, or both. The anterior column can be extended by adding a structural interbody graft to the area of concern (Fig.
Some chemicals contribute to sensitivity to the sun. These can cause two different types of photosensitive reactions: phototoxic and photoallergic. Phototoxic reactions are usually caused when a new chemical in the body interacts with ultraviolet rays from the sun.oxycycline and tetracycline, for example, can cause this reaction. The result is a skin rash that looks like a severe sunburn. These usually develop within about 24 hours of exposure to the sun. Photoallergic reactions can also develop as a side effect of some types of medication.