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The aim of this study is to illustrate and discuss the fundamentals of a well-succeeded and minimally invasive technique of surgical reintervention for installing implant in the reduced area of the alveolus, affected by agenesis, and traumatized by an unsuccessful intervention. Materials and methods: A 27-year-old patient sought dental care and her main cause was the great dissatisfaction with the aesthetic sequelae in the region of the right upper lateral incisor, in addition to the uncertainty regarding the predictability of a new unitary implant. Imaging exams showed trauma in the middle and apical region of the canine root surface. The dimensions of the edentulous area varied between 4.6 and 5.52 mm. A small diameter implant (BLT 2.9mm SC, Loxim SLActive® 12 mm, TiZr - Straumann Dental Implant System) was planned and installed, in addition to a subepithelial connective graft. Results: The results achieved allowed to restore the desired function and aesthetics, with excellence, low morbidity, in addition to a predictability favored by the benefits related to small diameter implants. Conclusions: The concept of minimally invasive dentistry is becoming an effective surgical approach and, although these implants present a higher risk for fracture than do large-diameter implants, implant fractures are rarely observed.

Nerve damage during third molars removal is an inherent risk of the procedure due to the anatomical proximity of these structures. Coronectomy is an effective technique that can reduce the risk of developing paresthesia caused by this injury. The present study aims to report a clinical case in which the coronectomy was performed describing its technique. The procedure was performed on a 25-year-old male patient, with third molars removal indication. The radiological exam suggested an intimate relationship between the lower right third molar roots and the mandibular canal. The coronectomy technique was performed under local anesthesia and the follow-up was performed after seven days, four months and four years. One week after surgery patient reported good recovery and does not showed radiographic signs or clinical symptoms of sensory or other pathological disorders. After four years, a new radiography was performed, where sign of peripheral bone formation and the absence of any pathological aspect or migration were observed. Considering the low complexity and morbidity of the technique, it becomes a good alternative to extraction, aiming to reduce the development of paresthesia in high-risk cases.