Pyaemia (or pyemia) is a type of sepsis that leads to widespread abscesses of a metastatic nature. It is usually caused by the staphylococcus bacteria by pus-forming organisms in the blood. Apart from the distinctive abscesses, pyaemia exhibits the same symptoms as other forms of septicaemia. It was almost universally fatal before the introduction of antibiotics. Sir William Osler included a three-page discussion of pyaemia in his textbook The Principles and Practice of Medicine, published in 1892. He defined pyaemia as follows:

A general disease, characterized by recurring chills and intermittent fever and the formation of abscesses in various parts, all of which result from the contamination of the blood by products arising from a focus contaminated by the bacteria of suppuration. Earlier still, Ignaz Semmelweis – who later died of the disease – included a section titled "Childbed fever is a variety of pyaemia" in his treatise, The Etiology of Childbed Fever (1861). Jane Grey Swisshelm, in her autobiography titled Half a Century, describes the treatment of pyaemia in 1862 during the American Civil War. Types
arterial p.  Pyaemia resulting from dissemination of emboli from a thrombus in cardiac vessels. cryptogenic p.  Pyaemia of an origin that is hidden in the deeper tissues. metastatic p.  Multiple abscesses resulting from infected pyaemic thrombi. portal p.  Suppurative inflammation of the portal vein. Symptoms
The disease is characterized by intermittent high temperature with recurrent chills; metastatic processes in various parts of the body, especially in the lungs; septic pneumonia; empyema. It may be fatal.
Each type of tool is designed to be used in specific areas of the mouth. Some commonly used instruments include sickle scalers which are designed with a pointed tip and are mainly used supragingivally. Curettes are mainly used to remove subgingival calculus, smooth root surfaces and to clean out periodontal pockets. Curettes can be divided into two subgroups: universals and area specific instruments. Universal curettes can be used in multiple areas, while area specific instruments are designed for select tooth surfaces. Gracey curettes are a popular type of area specific curettes. Due to their design, area specific curettes allow for better adaptation to the root surface and can be slightly more effective than universals. Hoes, chisels, and files are less widely used than scalers and curettes. These are beneficial when removing large amounts of calculus or tenacious calculus that cannot be removed with a curette or scaler alone. Chisels and hoes are used to remove bands of calculus, whereas files are used to crush burnished or tenacious calculus.For hand instrumentation to be effective and efficient, it is important for clinicians to ensure that the instruments being used are sharp. It is also important for the clinician to understand the design of the hand instruments to be able to adapt them properly.Ultrasonic scalers, also known as power scalers, are effective in removing calculus, stain, and plaque. These scalers are also useful for root planing, curettage, and surgical debridement.