Implant retained prosthesis on a free fibula flap: A challenging procedure for prosthetic and soft tissue management.

A 39-year-old woman who had undergone fibular flap reconstruction and simultaneous implant placement after the surgical removal of a cemento-ossifying fibroma was experiencing mild discomfort 3 years later and requested an implant-supported prosthesis to restore her edentulous left maxillary quadrant. Initially, an interim removable partial denture was provided and later duplicated with clear resin. The interim prosthesis identified the excessive thickness of the grafted cutaneous soft tissue and the inadequate emergence angle of the nonfunctioning implants. By using the interim prosthesis as a surgical guide, vestibuloplasty was performed to thin the peri-implant soft tissue and the excessive skin graft from the initial maxillofacial surgery. Concurrently, the emergence angle of the implant was corrected with angled multi-unit abutments. A tissue compression stent was then made and attached to the abutments to guide the soft tissue healing process. When the peri-implant soft tissue had stabilized, a definitive implant-supported prosthesis was provided.

Implant-supported bar overdentures in patients treated surgically for head and neck cancer: Two case reports.

Prosthetic rehabilitation of patients who have undergone head and neck cancer (HNC) surgery could be very challenging. The aim of this article is to present two HNC clinical cases rehabilitated with implant-supported removable complete dental prosthesis with different types of CB.

Influence of polymerization pressure and post-cure treatment on conversion degree and viscoelastic properties of polymer infiltrated ceramic network.

This study aimed at determining an optimum polymerization pressure for Polymer Infiltrated Ceramic Network (PICN) blocks by characterizing the conversion degree (DC) and the viscoelastic properties of experimental PICN blocks polymerized at 90 °C under various high pressures followed or not by post-cure treatment (PC). Near infrared analysis and dynamic mechanical analysis were used to characterize DC and viscoelastic properties of sixteen PICN: one control (thermo-cured) and fifteen experimental groups (one thermo-cured followed by PC and fourteen high pressure polymerized PICN, in the range of 50-350 MPa without and with PC). Conversion degree of high pressure polymerized PICN blocks without post curing displays an optimum between 100 and 150 MPa resulting in an improved E' and Tg. Post curing induces a higher DC with a controversial effect on thermomechanical properties. The results suggested that 100-150 MPa without PC is an optimum polymerization parameter, resulting in PICN blocks with significantly better DC, Tg, E'.