Immediate Rehabilitation of the Edentulous Mandible Using Ankylos SynCone Telescopic Copings and Intraoral Welding: A Pilot Study.
Immediate Rehabilitation of the Edentulous Mandible Using Ankylos SynCone Telescopic Copings and Intraoral Welding: A Pilot Study.
Filed under: Rehab Centers
Int J Periodontics Restorative Dent. 2012 Dec; 32(6): e189-94
Degidi M, Nardi D, Sighinolfi G, Piattelli A
The aim of this prospective study was to assess the suitability of immediate rehabilitation of the edentulous mandible using SynCone copings and the intraoral welding technique. Patients with an edentulous mandible were fitted with a removable restoration supported by an intraorally welded titanium bar. Copings were connected to their respective SynCone 5-degree abutments and then welded to a titanium bar using an intraoral welding unit. This framework was used to support the definitive restoration, which was delivered on the day of implant placement. Restoration success and survival, implant success, and biologic or technical complications were assessed immediately after surgery and at 6 and 12 months. Twenty-two patients were consecutively treated with 88 immediately loaded implants. No acrylic resin fractures or radiographically detectable alterations of the welded frameworks were present in the 22 restorations delivered. One implant (1.1%) failed 1 month after surgery; all remaining implants (98.9%) were clinically stable at the 12-month follow-up. Within its limitations, this pilot study demonstrated that it is possible to successfully rehabilitate the edentulous mandible on the day of surgery with a definitive restoration supported by an intraorally welded titanium framework and SynCone 5-degree abutments.
HubMed – rehab
The connective tissue platform technique for soft tissue augmentation.
Filed under: Rehab Centers
Int J Periodontics Restorative Dent. 2012 Dec; 32(6): 665-75
Zucchelli G, Mazzotti C, Bentivogli V, Mounssif I, Marzadori M, Monaco C
The presence of a localized alveolar ridge defect, especially in the maxillary anterior dentition, may complicate an esthetic rehabilitation. The goal of this case report is to describe a novel subepithelial connective tissue graft technique for soft tissue augmentation in Class III ridge defects. Surgical intervention consisted of in situ maintenance of a connective tissue “platform*quot; at the edentulous space, which facilitated the stabilization and suturing of the connective tissue grafts used for soft tissue augmentation. Adequate graft thickness to treat the deep horizontal soft tissue loss was obtained by doubling the width of a de-epithelialized free gingival graft that was subsequently folded on itself. The soft tissue conditioning at the level of the pontic began 9 months after surgery by shaping the soft tissue with a bur and filling the space with flowable composite resin applied above the pontic. The final prosthetic phase began 14 months after surgery. A reproduction of the anatomical cementoenamel junction in the provisional and definitive restorations was performed to improve the soft tissue emergence profile. Nine months after surgery, a soft tissue augmentation of 5 mm in the vertical and 4 mm in the horizontal dimension was accomplished. The suggested surgical technique was able to accomplish horizontal and vertical soft tissue augmentation in a single surgical step.
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Stress distribution and micromotion analyses of immediately loaded implants of varying lengths in the mandible and fibular bone grafts: a three-dimensional finite element analysis.
Filed under: Rehab Centers
Int J Oral Maxillofac Implants. 2012 Sep; 27(5): e77-84
Wu JC, Chen CS, Yip SW, Hsu ML
Purpose: The aim of the present study was to compare the biomechanical effects of different lengths of implants in an immediate loading condition in mandibular and fibular bone. Three-dimensional (3D) nonlinear finite element analysis (FEA) was used to examine the complex irregular structures. The variables of this research were the two different bone types (mandible and fibula) and three different implant lengths. Materials and Methods: Simplified half models were constructed for 3D FEA. Three different implant lengths (6 mm, 10 mm, and 15 mm) were inserted into the mandibular and fibular bone models, which were made to simulate immediate implant loading conditions. A load of 125 N was applied to the center of the suprastructure at a 45-degree angle relative to the long axis of the implant, and the resultant maximum von Mises equivalent (EQV) stresses, stress distribution, strain energy, and micromotion were measured. Results: In the mandible, the maximum EQV stresses were 115.636 MPa, 155.943 MPa, and 157.105 MPa with the 6-mm, 10-mm, and 15-mm implants, respectively. The mean EQV stresses were 64.145 MPa, 77.925 MPa, and 78.500 MPa, respectively. In the fibula, the maximum EQV stresses were 174.04 MPa, 157.456 MPa, and 144.353 MPa with the 6-mm, 10-mm, and 15-mm implants, respectively. The mean EQV stresses were 82.329 MPa, 73.526 MPa, and 74.050 MPa, respectively. Conclusion: The micromotion in the fibula models was lower than that seen in the mandible models. EQV stress in the fibular bone was different from that in the mandible. Short implants can be an option for oral rehabilitation in the mandible; however, implants in the fibula should probably have bicortical engagement.
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Effectiveness of piezoelectric surgery in preparing the lateral window for maxillary sinus augmentation in patients with sinus anatomical variations: a case series.
Filed under: Rehab Centers
Int J Oral Maxillofac Implants. 2012 Sep; 27(5): 1211-5
Cortes AR, Cortes DN, Arita ES
Purpose: The present article sought to evaluate the effectiveness of a piezoelectric surgical unit for maxillary sinus augmentation surgeries in avoiding perforation of the sinus membrane and other possible procedural complications in patients with anatomical variations of the sinus. Materials and Methods: Twenty-five patients presenting sinus anatomical variations, who were indicated for a total of 40 sinus grafting procedures performed by the lateral window approach with a piezoelectric device, were analyzed. After 6 months of healing, implants were placed. Information collected included clinical and computed tomographic information on anatomical variations in the sinus bone walls, in the size of the sinus, and in the thickness of the sinus membrane. Occurrence of sinus membrane perforation and computed tomographic measurements of the amount of bone height gained with the grafting procedures were also recorded. Results: Only two patients presented a small perforation (less than 5 mm in diameter) of the sinus membrane, which occurred only after osteotomies of the lateral windows and did not compromise the surgical outcome. No implants were lost during a mean follow-up period of 19 months. Conclusion: The use of piezoelectric surgery allowed for the accomplishment of all rehabilitation treatments within the follow-up period of this study.
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