Horizontal Bone Reconstruction on sites with different amounts of native bone: a retrospective study

Abstract: The lack of guidelines for bone augmentation procedures might compromise decision making in implantology. The objective of this study was to perform a retrospective study to verify the outcomes of horizontal bone reconstruction in implant dentistry with different types of materials and amounts of native bone in the recipient bed to allow for a new guideline for horizontal bone reconstruction. One hundred preoperative CT scans were retrospectively evaluated and categorized in accordance to horizontal bone defects as presence (Group P) or absence (Group A) of cancellous bone in the recipient bed. Different approaches were used to treat the edentulous ridge and the outcomes were defined either as satisfactory or unsatisfactory regarding the possibility of implant placement. The percentage distribution of the patients according to the presence or absence of cancellous bone was 92% for Group P and 8% for Group A. In Group P, 98% of the patients had satisfactory outcomes, and the use of autografts had 100% of satisfactory outcomes in this group. In Group A, 37.5% of the patients had satisfactory outcomes, and the use of autografts also yielded 100% of satisfactory outcomes. The use of allografts and xenografts in Group A had 0% and 33.3% of satisfactory outcomes, respectively. Therefore, it seems reasonable to speculate that the presence of cancellous bone might be predictive and predictable when the decision includes bone substitutes. In cases of absence of cancellous bone in the recipient bed, the use of a vitalized graft seems to be mandatory.

Surgical techniques for maxillary bone grafting - literature review / Técnicas cirúrgicas para a enxertia óssea dos maxilares - revisão da literatura

For oral rehabilitation with implant-supported prostheses, there are required procedures to create the bone volume needed for installation of the implants. Thus, bone grafts from intraoral or extraoral donor sites represent a very favorable opportunity. This study aimed to review the literature on the subject, seeking to discuss parameters for the indications, advantages and complications of techniques for autogenous bone grafts.

Para a reabilitação bucal com as próteses implantossuportadas é necessário a realização de procedimentos para criar o volume ósseo necessário para a instalação dos implantes. Com isso, os enxertos ósseos provenientes de áreas doadoras intrabucais ou extrabucais, representam uma possibilidade bastante favorável. O presente trabalho objetivou realizar uma revisão da literatura em que procurou discutir parâmetros para as indicações, as vantagens e complicações para as técnicas dos enxertos ósseos autógenos.

Alternativas de fixação no tratamento da maxila: enxerto ósseo utilizado como placa fixadora

O propósito deste estudo foi avaliar o resultado do tratamento da maxila, quando o enxerto ósseo foi utilizado como placa de fixação. Os enxertos ósseos foram obtidos a partir da calvária ou da mandíbula, sendo utilizados para fixação intramaxiliar no lugar de placas fixadoras tradicionais. A fixação foi feita com parafusos. As vantagens deste procedimento de fixação foram redução das taxas de infecção e dos custos cirúrgicos.

Clinical results of localized alveolar ridge augmentation with bone grafts harvested from symphysis in comparison with ramus

Autogenous onlay bone grafting is a common procedure for alveolar ridge augmentation. It has been suggested that the amount of healed bone after this technique would be significantly less than the initial quantity. The aim of this study was to determine the relationship between the various parameters influencing the outcome of ridge augmentation procedures. Thirty-two patients, 17 males and 15 females [mean age 40 +/- 8.66], requiring lateral ridge augmentation in the anterior maxilla were recruited. Bone grafts obtained from either the mandibular ramus or symphysis were grafted on the recipient site and the buccolingual dimensions of the edentulous ridge before and six months after the procedure were measured and the difference between them was considered as ridge augmentation [RA]. Parameters including graft thickness [GT], graft area [GA] and donor site [DS] were also recorded. Onlay bone grafts, taken from mandibular and symphysis areas, significantly increased the buccolingual dimension of the alveolar ridge [mean 1.98 +/- 1.22 mm, p < 0.001]. However, the mean RA by symphysis grafts was significantly greater than ramus grafts [2.49 mm vs. 1.48 mm]. There was also a significant correlation between graft thickness, surface area and the amount of bone augmentation. Symphysis area provides thicker and larger grafts, which may result in a better clinical outcome in alveolar ridge augmentation

Reconstrucción de reborde orbitario y piso de órbita con injerto de hueso del arco cigomático, placas Lactosorb y malla de titanio / Reconstruction of orbital ridge and floor with cygomatic bone graft, Lactosorb plates and titanium mesh

El motivo de la presentación es poner en consideración una técnica quirúrgica destinada a la reconstrucción del piso de la órbita y el reborde orbitario con un injerto de hueso y fijación rígida que fue resecado debido a un tumor que afectaba la totalidad del maxilar superior del lado derecho yla zona orbitaria del mismo lado. La reconstrucción post-exéresis de tumores en el área maxilofacial es uno de los desafíos más importantes que se le plantean al cirujano. Actualmente, se cuenta con un conjunto de materiales de reemplazo de probada eficacia que, asociados con los injertos de tejido óseo, brindan una excelente alternativa para la reconstrucción