Some interventions may be contraindicated in certain situations.
It is absolutely not possible to perform these procedures (such as implants, sinus lift, apical microsurgery, etc.) in the following situations:
- HEART: heart diseases affecting the valves (valvulopathies), recent heart attack, severe heart failure, cardiomyopathies.
- MISCELLANEOUS: certain bone diseases, cancer in progress, certain immunological diseases, immuno-suppressive treatments, AIDS declared, organ transplants pending, certain psychiatric diseases, highly irradiated jawbones (radiotherapy treatment), treatment of osteoporosis or certain cancers with biphospnonates.
Complications (in case of oral surgery or implants) CAN BE SERIOUS.
For children, it is not possible to place an implant before the end of the growth of the jaws (usually 17-18 years).
These interventions (such as implants, sinus lift, apical microsurgery, etc.) should be carried out with the greatest caution in the following cases: diabetes (especially insulin-dependent), angina pectoris (angina), seropositivity (absolute contraindication for declared AIDS), heavy smoking, certain psychiatric illnesses, cervicofacial radiotherapy (depending on the area, quantity of radiation, location of the cancerous lesion, etc.), certain autoimmune illnesses, drug and alcohol addiction, pregnancy. Specifically for the "sinus lift", the practitioner will act with caution in the following cases: sinus pathologies (chronic or acute sinusitis, polyps, aspergilosis, etc.).
Relative local contraindications
These operations (such as implants, sinus lift, apical microsurgery, etc.) should be done on a case by case basis, with caution in the following cases Insufficient bone, Certain diseases of the mucous membrane of the mouth, Periodontal diseases (loosening), gums must be cleaned and the disease stabilised beforehand, Severe bruxism (patient clenching his teeth), unbalanced occlusion ratio (between the upper and lower teeth), Infections in the neighbouring teeth (pockets, cysts, granulomas), important sinusitis, poor hygiene of the mouth and teeth.
This list is by no means exhaustive and contraindications are left to the discretion of the practitioner who examined you.
Immediate complications of implants
Anaesthetic risk, non-osteo-integration of the implant, infections, haemorrhages (not serious in most cases), nerve damage.
Late complications of implants
Late failure - several years after placement - may be due to mechanical factors, loosening of the implant (as with a natural tooth), lack of hygiene or poor general condition.
Bleaching is not recommended in many cases, especially for children's and teenagers' teeth, as well as for teeth with caries, wear or abrasion lesions, hypersensitivity (teeth that are very sensitive to cold), large or non-tight fillings.
Bleaching products, especially if used in high concentrations or repeatedly, have a demineralising effect on the hard tissues of the tooth and increase their permeability; in addition to the risk of mechanical embrittlement of the tooth, the dental pulp may be more exposed to chemical and thermal aggression. Finally, these products react with dental filling materials (amalgams, composites) and can damage the junction between the tooth and the filling, thus encouraging infiltration and recurrence of caries.
In view of these risks and contraindications, an examination of the teeth and the oral mucosa by the practitioner is essential before any tooth whitening treatment.
Source : http://www.sante.gouv.fr/quels-sont-les-risques-y-a-t-il-des-contre-indications.html
Contraindications are parafunctions (bruxism), occlusal disturbances (too much malpositioning of the teeth), teeth that are too decayed, or periodontal problems (gum disease).