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- ItemSomente MetadadadosAccuracy and Complications of Computer-Designed Selective Laser Sintering Surgical Guides for Flapless Dental Implant Placement and Immediate Definitive Prosthesis Installation(Amer Acad Periodontology, 2012-04-01) Di Giacomo, Giovanni A. [UNIFESP]; Silva, Jorge V. da; Silva, Airton M. da; Paschoal, Gustavo H.; Cury, Patricia R.; Szarf, Gilberto [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Renato Archer Informat Technol Ctr; Universidade Federal da Bahia (UFBA)Background: Computer-aided dental implant placement seems to be useful for placing implants by using a flapless approach. However, evidence supporting such applications is scarce. the aim of this study is to evaluate the accuracy of and complications that arise from the use of selective laser sintering surgical guides for flapless dental implant placement and immediate definitive prosthesis installation.Methods: Sixty implants and 12 prostheses were installed in 12 patients (four males and eight females; age range: 41 to 71 years). Lateral (coronal and apical) and angular deviations between virtually planned and placed implants were measured. the patients were followed up for 30 months, and surgical and prosthetic complications were documented.Results: the mean +/- SD angular, coronal, and apical deviations were 6.53 degrees +/- 4.31 degrees, 1.35 +/- 0.65 mm, and 1.79 +/- 1.01 mm, respectively. Coronal and apical deviations of < 2 mm were observed in 82.67% and 58.33% of the implants, respectively. the total complication rate was 34.41%; this rate pertained to complications such as pulling of the soft tissue from the lingual surface during drilling, insertion of an implant that was wider than planned, implant instability, prolonged pain, midline deviation of the prosthesis, and prosthesis fracture. the cumulative survival rates for implants and prostheses were 98.33% and 91.66%, respectively.Conclusions: the mean lateral deviation was < 1.8 mm, and the mean angular deviation was 6.53 degrees. However, 41.67% of the implants had apical deviation > 2 mm. the complication rate was 34.4%. Hence, computer-aided dental implant surgery still requires improvement and should be considered as in the developmental stage. J Periodontol 2012;83:410-419.
- ItemSomente MetadadadosCorneal infections after implantation of intracorneal ring segments(Lippincott Williams & Wilkins, 2004-08-01) Hofling-Lima, A. L.; Branco, B. C.; Romano, A. C.; Campos, MQS; Moreira, H.; Miranda, D.; Kwitko, S.; Freitas, D. de; Casanova, F.; Sartori, M.; Schor, P.; Souza, L. B.; Universidade Federal de São Paulo (UNIFESP); Univ Fed Parana; Univ Fed Rio Grande SulPurpose: To report risk factors, clinical course, and outcome in patients with infectious keratitis following implantation of intracorneal ring segments (ICRS).Methods: the records of 8 patients with culture-proven infectious keratitis after ICRS (Ferrara(R) or Intacs(R)) implantation were retrospectively reviewed. Age, gender, corneal findings, ocular abnormalities, the condition that led to ICRS implantation, immediate prior use of a contact lens, elapsed time between implantation and the onset of symptoms, previous medications, and systemic disorders were noted.Results: Culture-positive infectious keratitis developed in 7 eyes of 7 patients (2 men and 5 women) with a mean age of 35 years who underwent Ferrara implantantion for the treatment of keratoconus and in a 29-year-old man who underwent Intacs implantation for correction of low myopia. Contact lens use, diabetes, and trauma were factors possibly associated with the risk of infection in three cases. Microorganisms, identified in all cases, included Staphylococcus aureus, Streptococcus viridans, Streptococcus pneumoniae, Pseudomonas sp, Nocardia sp, Klebsiella sp, and Paecylomices sp. Onset of symptoms of infection varied from less than 1 week to 22 months postoperatively, depending on the infecting organism.Conclusions: infectious keratitis following ICRS implantation is a sight-threatening complication for which early recognition and rapid institution of appropriate treatment may result in a better visual outcome.
- ItemAcesso aberto (Open Access)Implantes extraorais em pacientes irradiados(Associação Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial, 2013-04-01) Oliveira, Joaquim Augusto Piras de; Abrahão, Márcio [UNIFESP]; Dib, Luciano Lauria [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade PaulistaThe aim of this study is to analyze the success of extraoral osseointegrated implants used to support designed to rehabilitate craniofacial deformities. METHOD: This study was based on the retrospective assessment of charts from 59 patients submitted to cancer surgery and who received 164 extraoral implants to contain facial prosthesis. RESULTS: Among 164 implants, 42 were fixed in previously irradiated regions. Eight of the implants did not have osseointegration; and from these, two were fixed in irradiated bone. The result show 116 (95.1%) successfully osseointegrated implants in non-irradiated sites. The success rate among 42 implants fixed in previously irradiated bones was 40 (95.3%) osseointegrated implants. CONCLUSION: The use of extraoral craniofacial implants represents a safe and effective approach to treat facial deformities as a support for the rehabilitation prosthesis. Radiotherapy treatment does not prevent osseointegration.