For all statistical analyses, StatView 5. Becker et al. The phenomenon of intrusion is troublesome for the patient and on the other hand a challenge for the clinician.
Etiology of intrusion The cause for intrusion is unknown and several theories have been proposed. Fig 3 Angle between the tooth and the implant measured for the 84 pairs. Mismatch in the tooth and implant movement The natural teeth are attached to the alveolar bone by means of periodontal ligament fibers; whereas osseointegrated implant is rigidly anchored to the bone. Studies without English abstract were not included. Guideline 2: Do not end the fixed prosthesis on the weakest splinted abutment. To assess the loss of marginal bone over time, the marginal periimplant bone level was measured on intraoral radiographs.
Nevertheless, when the situation indicates, the implantologist can and should consider the option of connecting natural teeth to implant. Al-Omiri: ku. Biomechanical studies demonstrate that a shift of force distribution from the superstructure to the supporting teeth occurs when non-rigid connectors are used  ,  ,  ,  ,  and tooth intrusion was considered as potential complication of non-rigid  ,  ,  ,  ,  connection with frequent emergency appointments. The typical criterion is whether the implants lose more than 1 mm of marginal bone during the first 12 months of service, after which any further loss should not exceed 0.
Dental implant companies are encouraging every dentist everywhere to offer this treatment to their patients because they know the value dental implants can be for so many people. The tooth exhibits normal physiological movement in vertical, horizontal and rotational direction. Due to the shortage in within-subject, long term, randomized, controlled clinical trials regarding the subject a meta-analysis was not possible. Having discussed the above debate and despite the existing controversy, this treatment paradigm seems helpful in certain situations and provides the solution to some problems function and esthetics and patient-centred issues when partially edentulous patients are treated using implants. Selective grinding procedures must be employed to reduce the cantilever effect and redistribute stress in maximum intercuspation or lateral working position for a tooth implant supported prosthesis.
An Implant-supported fixed prosthesis consists of several parts. The degree of overloading depends on the occlusal factors, tooth mobility and the existing number of implants. Guideline 4: For a natural pier abutment between two implants a stress breaker is not indicated A living pontic decreases the interaction of forces found during function on account of the proprioceptive aspect of the periodontal complex. Eleven of the abutment teeth showed signs of intrusion, which was diagnosed as a discrepancy in the connector Fig 5 or in the occlusion on the abutment teeth. The most highly trained dentists with respect to this type of treatment are prosthodontists. Duplicate studies obtained during the search and studies on removable prostheses only were excluded.
It has been suggested that physiologic movement of the natural tooth causes the prosthesis to act as a cantilever generating maximum resultant load up to two times the applied load on the implant. Criteria for Implant Survival The implant success and survival classification according to Roos et al6 was used. By nature, the lower jaw has more dense bone than that of the upper jaw.
An implant-supported fixed prosthesis can replace both teeth and gum tissue. There are actually various material options available for the definitive prosthesis.