Biomechanical Analysis of Implant Assisted-Overdentures with Variations in the Attachments Systems


The aim of this study was to assess the stress patterns on the peri-implant zone and residual alveolar ridge in different overdenture attachment system designs by the photoelasticity method. Four attachments systems were tested: O-ring, ERA, Bar-clip, and Bar-clip/O-ring association. The prostheses were loaded with 100 N in five pre-determined points and the photoelastic model was evaluated by a circular polariscope. The anterior load, O-ring, and ERA showed better stress distribution in relation to the bars systems, which presented stress levels surrounding implants. The molar load, Bar-clip/O-ring association, presented the biggest stress concentration on the peri-implant region in relation to the others. When the second molar was loaded, there was a concentration of stress in the alveolar ridge in all situations analyzed. Within the limitation of this “in vitro” study, it could be concluded that there were biomechanical differences among the attachments systems analyzed, principally between isolated and the bars systems. The O-ring showed better stress distribution and the Bar-clip/O-ring showed higher stress concentration.

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Vedovatto, E. , Mazaro, J. , Filho, H. , Carvalho, P. , Mello, C. and Lemos, C. (2015) Biomechanical Analysis of Implant Assisted-Overdentures with Variations in the Attachments Systems. Materials Sciences and Applications, 6, 734-742. doi: 10.4236/msa.2015.68075.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Cunha, T.R., Della Vecchia, M.P., Regis, R.R., Ribeiro, A.B., Muglia, V.A., Mestriner Jr., W., et al. (2013) A Randomised Trial on Simplified and Conventional Methods for Complete Denture Fabrication: Masticatory Performance and Ability. Journal of Dentistry, 41, 133-142.
[2] Pennington, J. and Parker, S. (2012) Improving Quality of Life Using Removable and Fixed Implant Prostheses. Compendium of Continuing Education in Dentistry, 33, 268-276.
[3] Goiato, M.C., Ribeiro, P.P., Garcia, A.R. and dos Santos, D.M. (2008) Complete Denture Masticatory Efficiency: A Literature Review. Journal of the California Dental Association, 36, 683-686.
[4] Taguchi, A., Sanada, M., Suei, Y., Ohtsuka, M., Lee, K., Tanimoto, K., et al. (2004) Tooth Loss Is Associated with an Increased Risk of Hypertension in Postmenopausal Women. Hypertension, 43, 1297-1300.
[5] Abnet, C.C., Qiao, Y.L., Dawsey, S.M., Dong, Z.-W., Taylor, P.R. and Mark, S.D. (2005) Tooth Loss Is Associated with Increased Risk of Total Death and Death from Upper Gastrointestinal Cancer, Heart Disease, and Stroke in a Chinese Population-Based Cohort. International Journal of Epidemiology, 34, 467-474.
[6] Semba, R.D., Blaum, C.S., Bartali, B., Xue, Q.L., Ricks, M.O., Guralnik, J.M., et al. (2006) Denture Use, Malnutrition, Frailty, and Mortality among Older Women Living in the Community. The Journal of Nutrition, Health and Aging, 10, 161-167.
[7] Cakir, O., Kazancioglu, H.O., Celik, G., Deger, S. and Ak, G. (2014) Evaluation of the Efficacy of Mandibular Conventional and Implant Prostheses in a Group of Turkish Patients: A Quality of Life Study. Journal of Prosthodontics, 23, 390-396.
[8] Dias, R., Moghadam, M., Kuyinu, E. and Jahangiri, L. (2013) Patient Satisfaction Survey of Mandibular Two-Implant-Retained Overdentures in a Predoctoral Program. The Journal of Prosthetic Dentistry, 110, 76-81.
[9] Zafiropoulos, G.G. and Hoffman, O. (2011) Implant-Retained Dentures for Full-Arch Rehabilitation: A Case Report Comparing Fixed and Removable Restorations. General Dentistry, 59, e137-e143.
[10] Chee, W. and Jivraj, S. (2006) Treatment Planning of the Edentulous Mandible. British Dental Journal, 201, 337-347.
[11] Sadowsky, S.J. (2001) Mandibular Implant-Retained Overdentures: A Literature Review. Journal of Prosthetic Dentistry, 86, 468-473.
[12] Machado, A.C., Cardoso, L., Brandt, W.C., Henriques, G.E.P. and de Arruda Nóbilo, M.A. (2011) Photoelastic Analysis of the Distribution of Stress in Different Systems of Overdentures on Osseous-Integrated Implants. Journal of Craniofacial Surgery, 22, 2332-2336.
[13] Jacques, L.B., Moura, M.S., Suedam, V., Souza, E.A.Z. and Rubo, J.H. (2009) Effect of Cantilever Length and Frame-work Alloy on the Stress Distribution of Mandibular-Cantilevered Implant-Supported Prostheses. Clinical Oral Implants Research, 20, 737-741.
[14] Van Kampen, F.M., van der Bilt, A., Cune, M.S., Fontijn-Tekamp, F.A. and Bosman, F. (2004) Masticatory Function with Implant Supported Overdentures. Journal of Dental Research, 83, 708-711.
[15] Sadowsky, S.J. (2007) Treatment Considerations for Maxillary Implant Overdentures: A Systematic Review. Journal of Prosthetic Dentistry, 97, 340-348.
[16] Feine, J.S., Carlsson, G.E., Awad, M.A., et al. (2002) The McGill Consensus Statement on Overdentures. Mandibular Two-Implant Overdentures as First Choice Standard of Care for Edentulous Patients. Gerodontology, 19, 3-4.
[17] Fitzpatrick, B. (2006) Standard of Care for the Edentulous Mandible: A Systematic Review. Journal of Prosthetic Dentistry, 95, 71-78.
[18] Federick, D.R. and Caputo, A.A. (1996) Effects of Overdenture Retention Designs and Implant Orientation on Load Transfer Characteristics. Journal of Prosthetic Dentistry, 76, 624-632.
[19] Naert, I., Alsaadi, G. and Quirynen, M. (2004) Prosthetic Aspects and Patient Satisfaction with Two-Implant-Retained Mandibular Overdentures: A 10-Year Randomized Clinical Study. The International Journal of Prosthodontics, 17, 401-410.
[20] Celik, G. and Uludag, B. (2014) Effect of the Number of Supporting Implants on Mandibular Photoelastic Models with Different Implant-Retained Overdenture Designs. Journal of Prosthodontics, 23, 374-380.
[21] Pesqueira, A.A., Goiato, M.C., Filho, H.G., et al. (2014) Use of Stress Analysis Methods to Evaluate the Biomechanics of Oral Rehabilitation with Implants. Journal of Oral Implantology, 40, 217-228.
[22] Barão, V.A., Delben, J.A., Lima, J., Cabral, T. and Assunção, W.G. (2013) Comparison of Different Designs of Implant-Retained Overdentures and Fixed Full-Arch Implant-Supported Prosthesis on Stress Distribution in Edentulous Mandible—A Computed Tomography-Based Three-Dimensional Finite Element Analysis. Journal of Biomechanics, 46, 1312-1320.
[23] Ozan, O. and Ramoglu, S. (2015) Effect of Implant Height Differences on Different Attachment Types and Peri-Im-plant Bone in Mandibular Two-Implant Overdentures: 3D Finite Element Study. Journal of Oral Implantology, 41, e50-e59.
[24] Trakas, T., Michalakis, K., Kang, K. and Hirayama, H. (2006) Attachment Systems for Implant Retained Overdentures: A Literature Review. Implant Dentistry, 15, 24-34.
[25] Cune, M., Burgers, M., van Kampen, F., et al. (2010) Mandibular Overdentures Retained by Two Implants: 10-Year Results from a Crossover Clinical Trial Comparing Ball-Socket and Bar-Clip Attachments. The International Journal of Prosthodontics, 23, 310-317.
[26] Scherer, M.D., McGlumphy, E.A., Seghi, R.R. and Campagni, W.V. (2013) Comparison of Retention and Stability of Implant-Retained Overdentures Based upon Implant Number and Distribution. The International Journal of Oral & Maxillofacial Implants, 28, 1619-1628.
[27] Scherer, M.D., McGlumphy, E.A., Seghi, R.R. and Campagni, W.V. (2014) Comparison of Retention and Stability of Two Implant-Retained Overdentures Based on Implant Location. Journal of Prosthetic Dentistry, 112, 515-521.
[28] Abi Nader, S., de Souza, R.F., Fortin, D., De Koninck, L., Fromentin, O. and Albuquerque Jr., R.F. (2011) Effect of Simulated Masticatory Loading on the Retention of Stud Attachments for Implant Overdentures. Journal of Oral Rehabilitation, 38, 157-164.
[29] Karabuda, C., Yaltirik, M. and Bayraktar, M. (2008) A Clinical Comparison of Prosthetic Complications of Implant-Supported Overdentures with Different Attachment Systems. Implant Dentistry, 17, 74-81.
[30] Berg, T. and Caputo, A.A. (1993) Maxillary Distal-Extension Removable Partial Denture Abutments with Reduced Periodontal Support. Journal of Prosthetic Dentistry, 70, 245-250.
[31] Pigozzo, M.N., Laganá, D.C., Sesma, N., et al. (2014) Photoelastic Stress Analysis in Mandibular Bone Surrounding Bar-Clip Overdenture Implants. Brazilian Oral Research, 28, pii: S1806-83242013005000034

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