A Novel Approach to Alveolar Bone Complex Defects 3D Reconstruction

Abstract

The aim of the investigation was to assess the efficacy of the 3D reconstruction of the alveolar bone by means of guided bone regeneration based on computer-assisted 3D planning using a resorbable dental membrane.Materials and Methods. 35 practically healthy patients without a marked concomitant somatic pathology with a diagnosis of "partial teeth loss complicated by alveolar bone atrophy" took part in the study. All patients underwent reconstructive operations to eliminate the defects and restore the alveolar bone volume using guided bone regeneration procedure and resorbable dental membranes. Planning and operations were performed according to the developed unified protocol including computer-assisted 3D operation planning and fabrication of intraoperative templates for dental membranes using 3D prototyping.Results. The developed method of computer-assisted 3D operation planning and fabrication of intraoperative templates for dental membranes using 3D prototyping has proved to be effective as it reduces the time of operative intervention, excludes the risk of forming a smaller membrane of inadequate shape, gives the required bone volume.Conclusion. The proposed method of computer-assisted 3D operation planning and fabrication of intraoperative templates for dental membranes using 3D prototyping allows surgeons to improve the precision of the guided bone regeneration operations, to diminish the intraoperative time of membrane adaptation, and avoid the possibility of its mispositioning. At the same time, application of the resorbable dental membrane increases the efficacy of the 3D alveolar bone reconstruction.

Development and Preclinical Studies of Orthotopic Bone Implants Based on a Hybrid Construction from Poly(3-Hydroxybutyrate) and Sodium Alginate

“…Matrix porosity was evaluated by weightmeasuring method for testing porosity. First, the porous scaffold weight, diameter and height were measured (Acculab AL-64, USA), the theoretical volume of monolithic scaffold was calculated, the weight of uniform non-porous sample was determined with account of polymer density (1.25 g/cm 3 ). Porosity (p) was calculated using the formula:…”

“…Congenital and, particularly, post-traumatic maxillofacial defects and deformities are notable for a variety of shapes and to replace them not only osteoplastic materials but bone implants (BI) representing the shape of the reconstructed defect are needed [1]. The use of state-ofthe-art software combining the possibility of processing computed tomography data and virtual three-dimensional (3D) modelling enables researchers and clinicians to carry out computer-aided planning in reconstructive surgery and produce models of bone implants completely congruent to the recipient site [2,3], i.e. the process of preparing BI model for fabrication can be considered a feasible task.…”

“…Oxford Performance Materials, Inc. was one of the first companies to produce individual extramedullary implants using 3D prototyping technique [9]. In Russia there is a certified and approved for clinical application technology of manufacturing individual extramedullary polytetrafluorethylene implants for contour plastic surgery, however, this category of material is regarded as bioinert, but not biodegradable and not replaced by bone tissue [3,10].…”

Preservation of Bone and Soft Tissue Components of the Alveolar Ridge during Immediate Implantation in the Aesthetic Zone of Jaws with Bone Deficiency

“…A decrease in the height of the interdental papillae, changes in the gingival contour, biotype and morphology of the edentulous crest is accompanied by developing “tension syndrome”, which further aggravates the clinical situation, especially, in the aesthetic segment of the jaw [ 4 – 6 ]. These changes require multi-stage preparation for implant placement (bone and soft tissue augmentation), which increases rehabilitation time and often fails to provide a successful result [ 7 , 8 ].…”

Modified Two-Stage Split Technique for Controlled Ridge Augmentation in Horizontally Atrophic Posterior Mandible: the First Stage of Research

“…Currently, there are various methods for reconstructing the bone tissue of the edentulous alveolar ridge to eliminate horizontal atrophy: plastic surgery using autogenous bone blocks [ 7 – 12 ], guided bone regeneration [ 13 – 16 ], alveolar ridge spreading technique [ 17 ], alveolar ridge splitting technique [ 18 – 21 ], distraction osteogenesis [ 22 ]. Despite the large number of research papers in both domestic and foreign literature, there is an ongoing discussion about choosing the most optimal method for achieving this goal.…”