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retrograde peri-implantitisit has been described by misch as implant failure probably due to bone microfractures caused by premature implant loading
peri-implantitis infective process- bacterial originbacterial invasion of the peri-implant soft tissue results in its inflammation followed by rapid
after abutment connectionthe patient may complain of pain during screw tightening any clinical evidence should be looked into it is important not to
during abutment connectionimplants should be tested for the presence of any mobility and the radiographs should be taken these radiographs are very
before abutment connection there can be wound dehiscence and the presence of signs of infection such as swelling fistula pain prior to stage to
implant failureson the basis of the stage when problems occurs implant failures can be classified as i before abutment connectionii during abutment
explain the histologic techniques a clinician has to base the diagnosis only on the clinical and radiographic findings as microbiologic and
improper occlusal schemethis is an important cause of failure as the implant are more sensitive to occlusal trauma and leads to prosthetic failure
improper prosthetic designingis also a cause of failure and it reiterates the importance of planning the case with the end in mind the choice between
improper fit at the abutment- implant interfaceit is very vital that the fit of the abutment is crosschecked radiographically prior to final delivery
absence of passive fit of the prosthesisa passive fit of the prosthesis reduces long term stresses in the superstructure implant components and the
connecting implants to natural teeth and use as pier abutmentsthe issue of connecting implants and teeth to support a fixed prosthesis is
explain the biomechanics of cantilevers the biomechanics of cantilevers need to be understood it has been found that when a three unit prosthesis is
excessive cantilevercantilevers in implant dentistry are commonly used especially in the mandibular arch for edentulous patients receiving implant
improper implant designout of the plethora of implant systems available it is the responsibility of the clinician to select the most suitable in
number of implantsthe use of more implants decreases the number of pontics and the associated mechanics and strains on the prosthesis and dissipates
width of the implantthe width of the implant especially at the interface area is critical towards the success of the implant it has been recommended
length of the implant usedthe length of the implant to be used is dictated by the available bone height the success rate is proportional to the
improper implant type in improper bone typein routine sites with good quality bone the clinician should prefer implants without any superadded ha
implant selection errorsthere are a plethora of commercially available implant systems and designs qualitative and quantitative nature of the
contamination of the implant body before insertionthe implant may be contaminated by manufacturing error by the operator from non titanium
placement of the implant in an infected socket or a pathologic lesiondental implants may fail due to1 placement of the implant fixture into an
placing the implants in immature grafted sitesone of the most common causes of prosthetically related implant failure is believed to be the too rapid
overheating the bone and exerting too much pressureminimal temperature elevation during surgical drilling of the bone is a key factor in atraumatic
impaired healing and infection because of improper flap designthe oral field in itself is a contaminated area due to the presence of the normal oral