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İlk kez İngiliz doktor James Parkinson tarafından 1817 yılında titrek felç olarak tanımlanmıştır. Beynimizde hareketlerimizi kontrol eden ve bundan sorumlu olan hücreler bulunur. Bu hücrelerden kimyasal maddeler salgılanır. Bunlardan birisi de dopamindir. Dopamin beyine gelen bilgileri bir sinir hücresinden diğerine aktarır. Böylece vücut dengesi sağlanmış olur. Fakat bu hücrelerin bir kısmı hasar gördüğünde ya da azaldığında dopamin salgılanamaz. İşte azalmış dopamin sonucu vücutta titreme, yavaş hareket etme gibi vücudun dengesinin bozulmasıyla ortaya çıkan hastalığa parkinson hastalığı denilmektedir.Parkinson hastalığı
Parkinson, yavaş ve sinsi seyreden bir hastalıktır. Hastalık on yıl gibi bir süre boyunca sürekli ilerler. Ne ölümcül bir hastalıktır ne de felce neden olur. Başlangıcında tek taraflı belirtiler görülürken daha sonra bu bütün vücuda yayılır. Belirtilerin şiddeti her hastada farklıdır. Hastalık genelde 40 yaşından sonra görülür ve erkeklerde görülme sıklığı biraz daha fazladır.Sağlık istasyonu

DentalImpression Materialis a mainstay implement for almost every dentist who practices today.It is only through the accurate use of materials such as these thatyou are going to be able to provide your patient with correct fittingitems such as crowns. When your patient’s crown is fitting correctly,both you and the patient will be very pleased.

Dueto the important nature of crown, it is vitally important to use ahigh quality Dental Impression Material. It must be pleasanttasting in order to help ensure that your patients are able to be ascooperative as possible. In addition, many patients will be unhappyenough with an experience that includes unpleasant tasting materialthat they will avoid returning to your care at the prescribed times.

Whenyou are choosing a Dental Impression Material for your practice, youmust choose carefully. You will want a product that does not shrinkvery much and that has a shelf life that is more than adequate foryour needs. You want this material to offer you a setting time thatis fairly short. A setting time of two weeks or less is a good ruleof thumb to remember.

Whileyou want your Dental Impression Material to have a shortsetting time, you will also want it to have a sufficient amount ofwetness. This adequate amount of wetness allows you to manipulate thematerial with ease so that you are able to get a true impression ofthe tooth that you need to make a crown for.

 Whenyou are working with patients, you will want to keep the prep time ofthe materials that you are using to a minimum. You will want toreduce the amount of impatient that some patients can sometimes feelif they must wait too look for materials to be prepped before thatcan be used. By choosing an impression material with a short workingtime, you will help to ensure that the comfort of your patients is inthe foremost of your mind. Your patients will appreciate how quicklyare able to get the impressions you need for their crowns.