Biomechanical aspects of reinforced implant overdentures: A systematic review

Gibreel, Mona; Khalifa, Ahmed Khalifa; Said, Mohamed; Mahanna, Fatma; El-Amier, Nesma; Närhi, Timo; Perea-Lowery, Leila; Vallittu, Pekka K.

doi:10.1016/j.jmbbm.2018.12.006

Cited by 19 publications

(16 citation statements)

References 38 publications

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“…They found that PEEK showed a reduced reinforcement effect than cobalt chromium. In agreement with our observation, the authors in another systematic review concluded that strains on the underlying supporting structures of overdenture prostheses including dental implants and the residual ridge can be decreased and evenly distributed using a metal reinforcement 46 . Similarly in another in vitro study 36 , the authors reported that overdentures with cast metal cobalt-chromium reinforcement were associated with significantly reduced denture strains than overdentures with no reinforcement or stainless steel wire reinforcement.…”

Section: Discussionsupporting

confidence: 92%

“…This could be attributed to the increased rigidity of the metal reinforcement frame compared to PEEK reinforced frame when the thickness of the frames are standardized. Similarly, in another study the authors found that the increased rigidity of the denture causes even load distribution to the implants and residual ridge 46 which may contribute to reduce denture base thickness. The increased denture strains with PEEK reinforcement may be attributed to the reduced modulus of elasticity of the PEEK material, compared to Cr-Co castings 32,33 which make it more flexible thus enhancing more flexion and de-formation of the acrylic resin of the denture base.…”

Section: Discussionmentioning

confidence: 81%

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Effect of type of reinforcement on clinical denture base deformation with telescopic attachments of implant retained overdentures. A within-subject clinical study.

talawy

Hassan

2021

Egyptian Dental Journal

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Aim:The aim of this within-subject study was to evaluate and compare clinical denture base deformation with two types of denture base reinforcement for telescopic implant retained overdentures.Materials and methods: Six completely edentulous participants received two implants in the canine region of the mandible and the implants were connected to the overdentures with resilient telescopic attachments. Each patient received 2 types of denture reinforcement for the mandibular overdentures; 1) metal reinforced overdentures, 2) PEEK reinforced overdentures. Four straingauges were adhered to the lingual polished surface of each denture abutment top (C1 and C3), and 5 mm below abutment top (C2 and C4). Strain registrations were performed during maximum voluntary clenching. Results:The measured strains and implant positions C1 and C3 were tensile in nature and the measured strains at implant positions C2 and C4 were compressive in nature. The highest microstrain was noted at C3, followed by C1, then C2, and the lowest strain was noted was with C4 for both groups. There was no significant difference in recorded microstrains between C1 and C3 or between C2 and C4. For all strain gauge positions, PEEK reinforced overdentures recorded significantly higher microstrains than metal-reinforced overdentures. Conclusion:Within the limitation of this short term cross over trial, cobalt-chromium metal reinforcement for mandibular implant assisted overdentures is recommended than PEEK reinforcement as it reduced denture base strains and deformation during maximum voluntary clenching.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 81%

Effect of type of reinforcement on clinical denture base deformation with telescopic attachments of implant retained overdentures. A within-subject clinical study.

talawy

Hassan

2021

Egyptian Dental Journal

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“…Although numerous studies have shown that the palate less four-implant retained maxillary overdenture is a simple and effective solution and leads to significant improvement of patient-based outcomes. (4)(5)(6)(7) The increased load concentration over the implants may cause loosening of the attachments mucosal ulceration and implant overload (10)(11)(12) .…”

Section: Discussionmentioning

confidence: 99%

“…In addition the increased load concentration over the implants may cause loosening of the attachments mucosal ulceration and implant overload. (10)(11)(12) Many additives have been suggested to enhance the properties of denture base resin. The aim was to improve the impact strength, fatigue resistance and transverse strength of the acrylic resin.…”

Section: Introductionmentioning

confidence: 99%

“…Denture base reinforcement improves the rigidity of the base and distributes the functional forces to the implants. (10)(11)(12)(13)(14) Reinforcement of acrylic resin with fibers has been reported to improve the flexural and impact strength as well as the fatigue resistance of the resin fibers are supplied in form such as nylon, polyethylene, polyamide fiber, and particularly glass fiber. Several glass fibers are supplied in form of woven, loose and continuous such as roving or fiber bundle to strengthen dental polymers.…”

Section: Introductionmentioning

confidence: 99%

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Tomographic Assessment of reinforcement of acrylic resin denture base for palateless implant locator retained maxillary over denture.

Alam

El-Sayed

2021

Egyptian Dental Journal

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Objectives: This study was conducted to evaluate the effect of metallic (cobalt chromium), glass fiber and nano zirconia oxide reinforcement of acrylic resin denture base on the peri-implant crestal bone level changes in palateless locator retained maxillary over denture.Materials and Methods: Twenty-one completely edentulous male patients with maladaptive experience to maxillary dentures were selected to participate in this study. For all patients maxillary four implant-retained overdenture was constructed following the same basic principles. Every patient received four implants, two in the canine region with (3.6 mm in diameter & 12mm in length), and two in the second premolar region with (4.5 mm in diameter & 8mm in length); (Tiologic® Implants, Dentaurum, Ispringen, Germany) following the two stage surgical technique. Metal (cobalt chromium) reinforced over denture was constructed for the first group, while 5% fiber reinforced acrylic resin denture was constructed for the second group and Overdenture was reinforced using 5% of nano ZrO 2 for the group three patients. . Follow up visits were scheduled twelve and twenty four after implant loading for inspection of the prosthesis and radiographic evaluation Peri-implant crestal bone level changes were assessed using intra-oral radiographs taken with the standardized long cone paralleling technique using custom made acrylic template and the Rinn-xcp system. Results:The findings of the present study demonstrates that all the studied denture base reinforcement materials individually showed significance bone loss around implants (p< 0.05) after 12 months follow up period. Insignificant increase in the calculated means the peri-implant bone height changes of was evident during the intervals 12 -24. Group I Metal (cobalt chromium) reinforced heat cured acrylic resin denture showed more peri-implant bone loss compared to group II glass fiber and group III nano zirconia oxide reinforced acrylic resin denture base reinforcement. Although group II glass showed more peri-implant bone loss compared to group III glass during the follow up period statistically in significant difference between the two studied groups was found Conclusion: Within the limitations of this study, reinforcement of polymethyl methacrylate denture base with glass fiber or nano zirconia oxide should be considered in palateless implant retained maxillary over denture. Further clinical studies for newest reinforcement materials are necessary to ensure the effect of reinforcement within dental prostheses.

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Interarch space assessment in edentulous patients rehabilitated with complete removable dentures using open-access software.

Figueras-Álvarez

Clua-Palau

Caponi

et al. 2022

Journal of Dentistry

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Biomechanical aspects of reinforced implant overdentures: A systematic review

Cited by 19 publications

References 38 publications

Effect of type of reinforcement on clinical denture base deformation with telescopic attachments of implant retained overdentures. A within-subject clinical study.

Effect of type of reinforcement on clinical denture base deformation with telescopic attachments of implant retained overdentures. A within-subject clinical study.

Tomographic Assessment of reinforcement of acrylic resin denture base for palateless implant locator retained maxillary over denture.

Interarch space assessment in edentulous patients rehabilitated with complete removable dentures using open-access software.

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