Background : Although the computer guided surgery (CGS) can help the right positioning of the dental implants, by transfers three-dimensional data from CT to a surgery field, several aspects can interfere the accuracy of technique, it can lead to poor post-operative results with difference between planned and placed implants position that can even cause some injuries to the patients.Aim/Hypothesis : Our aim was review the scientific literature of the major failures within implant CGS. Despite that, we propose a CGS method, which eliminates some risk factors and allows the preparation of the surgical guide using the own tomographic guide in the office itself, without prototyping or drilling.Material and Methods : it was searched in PubMed and Google Scholar databases for terms such as-implant computer guided surgery failures, ìimplant guided surgery complicationsî, ìstate of art guided surgeryî. We also report a case of a fully edentulous 89 years-old lady, who was rehabilitated with dental implants in the mandible, using flapless approach and immediate loading, through the referred guided surgery technique.Results : the most common errors found in the literature were-inadequate planning, distortions during prosthesis duplication, failures during the tomographic examination, wrongs in aligning of the digital images, failures during the manufacture of the surgical guide, difference between tomographic and surgical templates, instability of the surgical guide, fully mucosa supported splints, among others.
Conclusion and Clinical Implications :The knowledge of the factors that can generate mistakes during guided surgery is important as a way to prevent failures and improve the results. The technique presented showed to be, simple, safe and accurate, in order to minimize these error factors.
Avulsion of a permanent tooth is a serious condition and a true dental emergency that can be associated with other traumatic injuries. In addition, in reimplanted avulsed teeth, ankylosis and external replacement resorption (ERR) are two typical biological responses, with long-term progression and outcome associated with the patient's growth stage. The purpose of this report is to present the long-term outcome of an 18-year-old patient who was the victim of a motor vehicle traffic accident that resulted in traumatic injury to the maxillary incisors, including an avulsed central incisor with extensive external replacement resorption (tooth 11). Twenty-two years later, due to the continuous effect of the ERR process on the reimplanted tooth and favorable bone weight, it was decided to perform rehabilitation with immediate guided implant by a simplified method (KEA-TECH system). In young patients, the decision to maintain the tooth even under unfavorable conditions may delay rehabilitation with implants.
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