Lay one piece down (left to right) using the light-cure wetting agent, then another (right to left), overlapping each other where optimal strength is required. The denture was cut back 0.6 mm over the desired position-over the Locator housing sites on the lower and always over the incisive papilla and Locator housing sites on the upper ( Figure 6).Ĭut the Perma Mesh into multiple pieces. This author likes Perma Mesh by PREAT, a multidirectional, printed-glass dry mesh ( Figure 5). The dentures were re-articulated, ground down, and polished (pre-high-shine), then the second framework fiber reinforcement could be implemented. Once the eFiber was tacked down and properly cured in place, then the regular denture processing was done. Grinding a channel is a personal preference. Having gone through this process with and without a channel, the author has not determined if one is better than the other strength-wise as none of the dentures have broken. Note that it is also possible to pre-grind a channel in the basal side of the teeth for even easier placement of the eFiber. One advantage to using this material is that it can be cured in sections, making the trip around the flask more manageable ( Figure 4). A hand instrument was used to tack the eFiber to the basal surface of the teeth and smooth out the remaining bit of the strand to the desired position ( Figure 3). The eFiber has a very tacky consistency due to its BIS-GMA and PMMA-impregnated unidirectional composition. Next, PREAT's eFiber was added to the primed basal surface of the teeth ( Figure 2). They cured for 20 seconds with a UV light. This is when fiber reinforcement could be added.Īfter the teeth were prepped by steam and sandblasted, a primer coat of the light-cure wetting agent was added to the basal surface of the denture teeth. The overdentures were invested in the IvoBase flasks (Ivoclar Vivadent ) with the permanent Locator housings engaged to the analogs using black processing caps. Using this information, the author's laboratory was able to do an accurate analysis of the working dimensions and a try-in with teeth, verifying esthetics and function. Master casts and record bases -with the final Locator housings in the baseplates for a stable occlusal plane record/gothic arch tracing and facebow mounting -were fabricated ( Figure 1). The original dentures were not reinforced, had constant fractures, and needed repair often. Her maxillary and mandibular ridges each had four Locator abutments with divergent angulation placement. As a technician and laboratory owner, the author has successfully used this method time and again for difficult cases.Ī female patient in her mid-fifties presented for treatment. The following is a step-by-step guide to fabricate a fully internal framework in-lab in a fraction of the time it takes with conventional metal frames. However, there are ways to help reinforce and strengthen the existing denture in the laboratory in a time- and cost-effective manner. When denture breakage problems arise due to faults in the original fabrication, it can be challenging to address them without needing to completely remake the prosthesis. Strengthen a prosthesis with this fabrication method Reinforced Overdentures Using PREAT eFiber and Perma Mesh Registration on AEGIS Dental Network is free. Improves the strength of an acrylic denture considerably.ĭimensions (W x H x D): 59 x 54 x 14 mm (2.32 x 2.13 x 0.55")ĭimensions (W x H x D): 59 x 54 x 14 mm (2.32 x 2.13 x 0.You must be signed in to read the rest of this article. The denture will stay in position even if breaks or cracks should occur in the acrylic. Insertion grid with increased stability for complete or partial upper dentures. Simple to match by cutting individual shapes. Fine mesh for individual reinforcement of acrylic dentures.
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