A variety of surgical procedures are sometimes necessary to treat periodontal disease.  These include grafting procedures to cover areas of exposed root, crown lengthening to expose more of the tooth for the dentist to be able to successfully place a crown, pocket depth reduction to treat deep pockets caused by periodontal disease and implant placement to replace missing teeth.  These procedures are commonly undertaken with local anaesthetic, the same as if you were having a filling.  Some patients prefer to have some sedation to help them relax or relieve any anxiety they may have about the procedures.  Oral sedation is commonly used, and for patients requiring a deeper level of sedation, intravenous sedation is available.  This is not a general anaesthetic, the patient may feel quite drowsy and often the medication reduces any memory of the procedure.