Indications:

• Single edentulous spaces (dental implant procedures preserve healthy teeth adjacent to the defect and render healthy teeth preparation unnecessary).
• Bounded edentulous spaces (in this case, dental implant procedures also help prevent damage to healthy teeth adjacent to the defect).
• Free-end edentulous spaces (dental implant procedures provide solutions other than removable dentures).
• Complete edentulism (implant supported prostheses provide excellent retention and superior stability even in patients with removable dentures)

Thus, it can be concluded that implant dentistry is indicated at any stage of edentulism.

Сontraindications:

Relative contraindications:

cardiovascular diseases (myocardial infarction, stroke); endocrine diseases (type 2 diabetes, climacteric syndrome, mild forms of hypothyroidism and hyperthyroidism); bone diseases (secondary osteoporosis, osteomalacia); allergic diseases which do not require hormonal replacement therapy; dentoalveolar diseases (periodontitis, abnormal occlusion, poor oral hygiene, precancerous conditions of the oral cavity, temporomandibular joint dysfunction); metallic implants in other organs; oncological diseases; chronic infectious diseases; pregnancy).

Absolute contraindications:

(dental implant procedures are absolutely contraindicated in patients suffering from the following diseases) bruxism; macroglossia; open tuberculosis; osteoporosis; decompensated heart failure; blood-forming organs diseases; central nervous system diseases and peripheral nervous system disorders; immune diseases (thymic hypoplasia, parathyroid hypoplasia, severe systemic lupus erythematosus); endocrine disorders (severe forms of hypothyroidism and hyperthyroidism, type 1 diabetes); malignant tumours; venereal diseases; HIV.