Oral Rehabilitation with Zygomatic Implants in a Patient with Cleft Palate.

Edentulous patients with an atrophic maxilla associated with lip-palate fissures have unpredictable results after undergoing grafting procedures. In situations where the atrophic maxilla does not adequately allow reconstruction, the use of zygomatic implants has been indicated, and probably these implants can be indicated for the rehabilitation of patients with lip-palate fissures. This case report describes the oral rehabilitation treatment of a patient with a lip-palate cleft treated with zygomatic implants and implant-supported fixed prosthesis with two years of follow-up. A 65-year-old female patient had a lip-palate cleft and previously underwent surgery to close the cleft. The patient had a severely atrophic maxilla and had difficulty adapting to a removable total prosthesis. Due to the small amount of bone remaining and extensive fibrous tissue in the palate region, a rehabilitation with conventional implants associated with zygomatic implants was chosen. Two zygomatic implants and a conventional implant were placed on the right side, and a zygomatic implant and conventional implant were placed on the left side; these implants were later activated by a protocol-type prosthesis. The zygomatic implants provided an adequate aesthetic and functional outcome of the prosthesis in a patient with cleft palate.

Does the Length of Dental Implants Inserted in Areas of Inferior Alveolar Nerve Lateralization Interfere on Mandibular Resistance to Fracture?

The aim of this study was to compare, in vitro, the mechanical resistance to vertical displacement of the mandible after osteotomy for lateralization of the inferior alveolar nerve and installation of dental implants. One hundred eighty polyurethane mandibles were equally divided into 6 groups: G1-intact hemi-mandibles (control group), G2-hemi-mandibles after osteotomy for lateralization of the inferior alveolar nerve, G3-hemi-mandibles with installation of 3 bicortical dental implants (3.75 × 13 mm), G4-hemi-mandibles with installation of 3 dental implants that did not reach the basal cortical bone (3.75 × 11 mm), G5-hemi-mandibles after osteotomy for lateralization of the inferior alveolar nerve and installation of 3 bicortical dental implants (3.75 × 13 mm) and G6-hemi-mandibles after osteotomy for lateralization of the inferior alveolar nerve and installation of 3 dental implants that did not reach the basal cortical bone (3.75 × 11 mm). The specimens were subjected to linear loading tests. The highest mean value of maximum load was found in G1 (412.36N ±â€Š11.99), followed by G2 (396.87N ±â€Š23.94), G3 (319.63N ±â€Š57.28), G4 (303.34N ±â€Š18.25), G5 (231.75N ±â€Š63.64) and G6 (228.13N ±â€Š20.75). Based on this data, it can be concluded that the bicorticalization (or not) of the implants was not a statistically significant risk factor for the vertical displacement of polyurethane hemi-mandibles.

Provisionalização imediata de implantes em alvéolos íntegros ­ relato de caso / Immediate loading of implants in fresh sockets ­ case report

A instalação de implantes com carga imediata é descrita na literatura como um procedimento com resultados previsíveis. Associado a essa técnica reabilitadora, o uso de implantes compactantes com formato cônico, de 3,5 mm de diâmetro, cria um espaço apropriado entre a tábua óssea vestibular e o implante para o preenchimento com biomaterial, promovendo a manutenção do arco côncavo vestibular, contribuindo para a obtenção e manutenção da estética do caso. O uso de componentes protéticos provisórios possibilita a escolha futura de um abutment definitivo quando a cicatrização dos tecidos adjacentes ao implante estiver concluída. O caso clínico descrito nesse artigo apresenta alta demanda estética. Foram extraídos os dois incisivos centrais superiores da paciente, e no mesmo momento cirúrgico, foram instalados dois implantes nos alvéolos frescos. Esses implantes obtiveram torque acima de 45 Ncm, o que permitiu seu carregamento imediato. Foram utilizados dois pilares provisórios personalizáveis e confeccionadas coroas provisórias através de mockup feito previamente sobre as coroas dos dentes antes das extrações. O gap foi preenchido com grânulos de biomaterial à base de tricálcio fosfato e hidroxiapatita para manutenção da tábua óssea vestibular, material que tem apresentado bons resultados clínicos. A cimentação das coroas provisórias foi então realizada após ajustes de oclusão. Uma semana após, a paciente apresentou os tecidos moles circundantes aos implantes com cicatrização satisfatória e imagens radiográficas com padrão de normalidade. Concluiu-se que a instalação imediata de implantes com provisionalização imediata é uma técnica viável, com bons resultados em casos em que a estética é exigida (AU).

Implant installation with immediate loading is described in the literature as a procedure with predictable results. Associated with this rehabilitation technique, the use of compacting implants with a conical shape, with a diameter of 3.5 mm, creates an appropriate space between the buccal bone board and the implant, to fill with biomaterial that promotes the maintenance of the concave buccal arch, contributing to the aesthetics of the case. The use of provisional prosthetic components allows the future choice of a definitive abutment when the healing of the tissues adjacent to the implant is complete. The clinical case described in this article presents a high aesthetic demand. The two upper central incisors were extracted from the patient, and at the same surgical moment, two implants were installed in the fresh sockets. These implants obtained torque above 45 Ncm, which allowed their immediate loading. Two temporary customizable crowds with temporary abutments were used through mockup previously made on the crowns of the teeth before extractions. The gap was filled with granules of biomaterial based on tricalcium phosphate and hydroxyapatite for maintenance of the buccal bone board, material that has presented good clinical results. The cementation of the provisional crowns was then performed after occlusion adjustments. One week later, the patient presented the soft tissues surrounding the implants with satisfactory healing and radiographic images with normality pattern. It is concluded that the placement of implants with immediate provisional crowds is a viable technique, with good results in cases where esthetics is required (AU).

Avaliação da satisfação de reabilitações com implantes zigomáticos / Satisfaction of rehabilitation with zygomatic implants

Introdução: A reabilitação oral de pacientes com atrofia óssea maxilar representa um grande desafio por estes pacientes apresentarem comprometimento da qualidade de vida, dificuldades alimentares, complicações nutricionais, dificuldades sociais e emocionais. Propostas de reabilitações de maxilas mutiladas e/ou atróficas com próteses totais fixas implantossuportadas, utilizando implantes zigomáticos, foram relatadas. Objetivo: O objetivo deste estudo foi avaliar o grau de satisfação dos pacientes reabilitados com implantes zigomáticos e convencionais, em função de carga imediata com prótese do tipo protocolo através de um estudo retrospectivo, por meio de questionário respondido pelos pacientes. Material e método: Foram incluídos dezenove pacientes, tratados na clínica do Instituto Latino Americano de Pesquisa e Ensino Odontológico (ILAPEO) em Curitiba, PR (Brasil), entre dezembro de 2005 e junho de 2010. Os pacientes foram reabilitados com 41 implantes zigomáticos e 73 implantes convencionais, todos do tipo cone Morse. As próteses, tipo híbridas, foram instaladas em carga imediata. Resultado: O índice de satisfação encontrado foi de 100%. Conclusão: Pode-se concluir que esta técnica de reabilitação restabelece fatores primordiais ao ser humano como mastigação, fonética e estética. Os pacientes relataram satisfação com o resultado do tratamento, conseguindo desenvolver atividades sociais dentro da normalidade, elevando sua autoestima.

Introduction: Rehabilitation of patients with atrophic maxilla is challenging. Atrophic maxilla patients present compromised quality of life, impaired function, deficient nutrition, social and emotional difficulties. The rehabilitation of atrophic maxilla by zygomatic fixtures has been previously proposed. Objective: This retrospective study evaluated the degree of satisfaction of patients rehabilitated by immediately loaded conventional and zygomatic fixtures supporting full-arch fixed dental prosthesis. A satisfaction questionnaire was used for patient assessment. Material and method: Nineteen patients treated at the Latin American Institute for Dental Research and Education (ILAPEO) between December 2005 and June 2010 were evaluated. Patients were rehabilitated with 41 zygomatic implants and 73 conventional implants under immediate load. Result: All assessed patients were completely satisfied with the provided rehabilitation. Conclusion: It can be concluded that rehabilitation with zygomatic fixtures is capable of restoring function, phonetics, and esthetic for patients with atrophic maxilla. The patients were satisfied with the treatment outcomes and showed increased self-esteem after the rehabilitation.