10 Contraindications of Dental Implant; Which Can Make Your Implant Failure; Dental implants are increasingly becoming the treatment of choice for missing teeth. Their indications include replacement of single teeth, partially edentulous ridges and fully edentulous arches.
A high number of studies and controlled clinical trials report suggesting the survival rates of endosseous implants greater than 90% over 10 years regardless of the number of teeth replaced or the type of definitive prosthesis.
Due to this high level of success that can be predicted, implant fixtures are potentially placed for a lifetime and also is being widely used for treatment modality.
There is no doubt that many patients can, and do, benefit from implants rather than traditional treatment modalities for oral reconstruction. However, implantology depends on many factors for a successful outcome. Some contraindications that may reduce the chances for optimal prognosis, or preclude patients from implant therapy, are:
10 Contraindications of Dental Implant
- Medical history – the following conditions may complicate or delay healing following surgical procedures:
- Endocrine disorders, e.g. diabetes mellitus, hypothyroidism and adrenal insufficiency;
- Uncontrolled granulomatous diseases, e.g. tuberculosis and sarcoidosis;
- Cardiovascular diseases, e.g. angina, aortitis, arteriosclerosis, aortic insufficiency or aneurysms;
- Bone diseases, e.g. Paget’s disease, fibrous dysplasia, histiocytosis X or osteoporosis;
- Carcinoma, e.g. oral, head or neck;
- Radiotherapy of the jaws, head or neck;
- Haematological disorders, e.g. anaemia, haemophilia (factor VIII deficiency), or factor IX, X, XII deficiencies, or reduced platelet count disorders, all predispose to poor haemorrhage control;
- Autoimmune diseases, e.g. HIV;
- Medication, e.g. bisphosphonates, immunosuppressant drugs following organ transplants;
- Other factors, e.g. xerostomia, smoking, pregnancy, psychological stress, poor oral hygiene;
- Very young and old patients – patients with primary or mixed dentitions are unsuitable candidates for implants, as well as the elderly or infirm, who may prefer non-surgical options;
- Surgical technique and experience of the operator influence initial surgical trauma and subsequent successful osseointegration;
- Dental variables, e.g. ridge anatomy, adjacent and opposing teeth, occlusal factors, soft tissue morphology;
- Previous dental history and present dental status;
- Skilled multidisciplinary dental specialists – liaison and successful cooperation with the prosthodontist, oral maxillofacial surgeon, orthodontist and dental ceramist;
- Duration of treatment is usually protracted, especially if soft and hard tissue grafting is envisaged. Therefore, the patient should have a degree of patience and endurance to last the course. Furthermore, compliance with oral hygiene procedures and smoking cessation are essential for positive outcomes;
- Cost is a major factor in the decision to embark on the implant option. While an implant-retained mandibular overdenture may be within the financial reach of many, a complex and comprehensive fixed oral rehabilitation may be limited to the few;
- Prognosis depends on all the above variables, and if unfavourable factors are likely to compromise implant treatment, it may be prudent to seek alternative modalities, rather than commencing a plan that may be fraught with complications and yield unsatisfactory postoperativeresults.
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