There are few contraindications to implant treatment.The main potential problem areas to consider are:

    1,Age.The fact that the implant behaves as an ankylosed unit restricts its use to individuals who have completed their jaw growth.Placement of an osseointegrated implant in a child results in relative submergence of the implant restoration with growth of the surrounding alveolar process during normal development.

    2,Untreated dental disease.The clinician should ensure that all patients are comprehensively examined,diagnosed and treated to deal adequately with concurrent dental disease.

    3,Bleeding disorders.Bleeding disorders are obviously relevant to the surgical delivery of treatment and require advice from the patient's physician.

    4,Poorly controlled systemic disease such as diabetes.Diabetes has been a commonly quoted factor to consider in implants treatment.It does affect the vasculature,healing and response to infection.Although there is limited evidence to suggest higher failure of implant in well-controlled diabetes,it would unwise to ignore this factor in poorly controlled patients.