Citation Information :
Mahgoli H, Asadi S, Hajmahmoudi M, Moharrami M, Arshad M. Mandibular Overdentures Supported by Two vs Four Endosteal Implants: A Retrospective Cohort Study. J Contemp Dent Pract 2019; 20 (5):582-586.
Aim: Documentation of marginal bone resorption caused by implant-supported mandibular overdentures is scarce. This study sought to evaluate marginal bone resorption, survival rate, patient satisfaction, peri-implant soft tissue status, and prosthetic aftercare of mandibular overdentures supported by two vs four implants.
Materials and methods: This retrospective cohort study evaluated 92 edentulous patients presented to the Implant Center of Tehran University of Medical Sciences; out of which, 46 patients received overdentures supported by two Implantium implants (group A), while the remaining 46 received overdentures supported by four Implantium implants (group B). Standard radiographic indices were assessed following the delivery of overdenture and after 2 years of functional loading. Clinical evaluation was performed after 2 years of function. Data were analyzed using the t test (for continuous variables) and the Mann–Whitney test (for ordinal variables).
Results: In group A, two implants were lost in one patient. The groups were not significantly different in terms of clinical or radiographic parameters (p > 0.05). Patient satisfaction and prosthetic aftercare were not significantly different in groups A and B (p > 0.05). Conclusions: During the 2-year evaluation period, the clinical and radiographic parameters were the same in patients who received overdentures supported by two or four implants.
Clinical significance: Successful results may be obtained by the use of mandibular overdentures supported by two or four implants.
Shirani G, Arshad M, et al. Immediate reconstruction of a large mandibular defect of locally invasive benign lesions (a new method). J Craniofac Surg 2007;18(6):1422.1428. DOI: 10.1097/scs.0b013e3180a77352.
Batenburg RH, Meijer HJ, et al. Treatment concept for mandibular overdentures supported by endosseous implants: a literature review. Int J Oral Maxillofac Implants 1998;13(4):539.545.
Van Waas MA. The influence of clinical variables on patients' satisfaction with complete dentures. J Prosthet Dent 1990;63(3):307.310.
Visser A, Raghoebar GM, et al. Mandibular overdentures supported by two or four endosseous implants. Clin Oral Implants Res 2005;16(1):19.25.
Tavakolizadeh S, Vafaee F, et al. Comparison of marginal bone loss and patient satisfaction in single and double-implant assisted mandibular overdenture by immediate loading. J Adv Prosthodont 2015;7(3):191.198. DOI: 10.4047/jap.2015.7.3.191.
Batenburg RH, Raghoebar GM, et al. Mandibular overdentures supported by two or four endosteal implants: a prospective, comparative study. Int J Oral Maxillofac Surg 1998;27(6):435.439.
Zarb G, Schmitt A. The longitudinal clinical effectiveness of osseointegrated dental implants: the Toronto Study. Part II: the prosthetic results. J Prosthet Dent 1990;64(1):53.61.
Antczak-Bouckoms A, Chalmers T. The importance of design and analysis in clinical trials. J Oral Implantol 1987;14(1):36.42.
Barmes D. The state of the science of patient outcome research. J Oral Implantol 1990;16(4):245.
Daabiss M. American Society of Anaesthesiologists physical status classification. Indian J Anaesth 2011;55(2):111. DOI: 10.4103/0019- 5049.79879.
Mombelli A, Oosten M, et al. The microbiota associated with successful or failing osseointegrated titanium implants. Oral Microbiol Immunol 1987;2(4):145.151.
Silness J, Loe H. Periodontal disease in pregnancy II. Correlation between oral hygiene and periodontal condition. Acta Odontol Scand 1964;22(1):121.135.
Stramotas S, Geenty JP, et al. The reliability of crown.root ratio, linear and angular measurements on panoramic radiographs. Clin Orthod Res 2000;3(4):182.191.
Zhang L, Geraets W, et al. A new classification of peri-implant bone morphology: a radiographic study of patients with lower implant-supported mandibular overdentures. Clin Oral Implants Res 2014;25(8):905.909. DOI: 10.1111/clr.12193.
Vervoorn JM, Duinkerke AS, et al. Assessment of denture satisfaction. Community Dent Oral Epidemiol 1988;16(6):364.367.
Mericske-Stern R. Overdentures with roots or implants for elderly patients: a comparison. J Prosthet Dent 1994;72(5):543.550.
Jemt T, Chai J, et al. A 5-year prospective multicenter follow-up report on overdentures supported by osseointegrated implants. Int J Oral Maxillofac Implants 1996;11(3):291.298.
Naert I, Gizani S, et al. A 5-year randomized clinical trial on the influence of splinted and unsplinted oral implants in the mandibular overdenture therapy. Part I: peri-implant outcome. Clin Oral Implants Res 1998;9(3):170.177.
Meijer HJ, Geertman ME, et al. Implant-retained mandibular overdentures: 6-year results of a multicenter clinical trial on 3 different implant systems. Int J Oral Maxillofac Surg 2001;59(11):1260.1268. DOI: 10.1053/joms.2001.27512.
Meijer HJ, Raghoebar GM, et al. A controlled clinical trial of implantretained mandibular overdentures; five-years' results of clinical aspects and aftercare of IMZ implants and Branemark implants. Clin Oral Implants Res 2000;11(5):441.447.
Behneke A, Behneke N, et al. A 5-year longitudinal study of the clinical effectiveness of ITI solid-screw implants in the treatment of mandibular edentulism. Int J Oral Maxillofac Implants 2002;17(6):799.810.
Wismeijer D, Van Waas MA, et al. Clinical and radiological results of patients treated with three treatment modalities for overdentures on implants of the ITIR Dental Implant System. A randomized controlled clinical trial. Clin Oral Implants Res 1999;10(4):297.306.
Engquist B, Bergendal T, et al. A retrospective multicenter evaluation of osseointegrated implants supporting overdentures. Int J Oral Maxillofac Implants 1988;3(2):129.134.
Meijer HJ, Raghoebar GM, et al. Mandibular overdentures supported by two or four endosseous implants: a 10-year clinical trial. Clin Oral Implants Res 2009;20(7):722.728. DOI: 10.1111/j.1600- 0501.2009.01710.x.
Stoker G, Wismeijer D, et al. An eight-year follow-up to a randomized clinical trial of aftercare and cost-analysis with three types of mandibular implant-retained overdentures. J Dent Res 2007;86(3):276.280. DOI: 10.1177/154405910708600315.
Wismeijer Dv, Van Waas M, et al. Patients' perception of sensory disturbances of the mental nerve before and after implant surgery: a prospective study of 110 patients. Br J Oral Maxillofac Surg 1997;35(4):254.259.
Timmerman R, Stoker G, et al. An eight-year follow-up to a randomized clinical trial of participant satisfaction with three types of mandibular implant-retained overdentures. J Dent Res 2004;83(8):630–633. DOI:10.1177/154405910408300809.
Overdentures supported by two IMZ implants in the lower jaw. A retrospective study of peri-implant tissues. Implant Dent 1995;4(3):203.
Stoker G, van Waas R, et al. Long-term outcomes of three types of implant-supported mandibular overdentures in smokers. Clin Oral Implants Res 2012;23(8):925.929. DOI: 10.1111/j.1600- 0501.2011.02237.x.
Lindquist LW, Rockler B, et al. Bone resorption around fixtures in edentulous patients treated with mandibular fixed tissue-integrated prostheses. J Prosthet Dent 1988;59(1):59.63.
Albrektsson T, Zarb G, et al. The long-term efficacy of currently used dental implants: a review and proposed criteria of success. Int J Oral Maxillofac Implants 1986;1(1):11.25.
Oh T-J, Yoon J, et al. The causes of early implant bone loss: myth or science? J Periodontol 2002;73(3):322.333. DOI: 10.1902/jop.2002.73.3.322.
Albrektsson T, Dahl E, et al. Osseointegrated oral implants: a Swedish multicenter study of 8139 consecutively inserted Nobelpharma implants. J Periodontol 1988;59(5):287.296. DOI: 10.1902/jop.19188.8.131.527.
Wismeijer D, Van Waas M, et al. Patient satisfaction with implantsupported mandibular overdentures: a comparison of three treatment strategies with ITI-dental implants. Int J Oral Maxillofac Surg 1997;26(4):263–267.
Donatsky O. Osseointegrated dental implants with ball attachments supporting overdentures in patients with mandibular alveolar ridge atrophy. Int J Oral Maxillofac Implants 1993;8(2):162.166.
Makkonen TA, Holmberg S, et al. A 5-year prospective clinical study of Astra Tech dental implants supporting fixed bridges or overdentures in the edentulous mandible. Clin Oral Implants Res 1997;8(6): 469.475.
Romeo E, Chiapasco M, et al. Implant-retained mandibular overdentures with ITI implants: a comparison of 2-year results between delayed and immediate loading. Clin Oral Implants Res 2002;13(5):495.501.
Heschl A, Payer M, et al. Overdentures in the edentulous mandible supported by implants and retained by a Dolder bar: a 5-year prospective study. Clin Implant Dent Relat Res 2013;15(4):589.599. DOI: 10.1111/j.1708-8208.2011.00380.x.
Ferrigno N, Laureti M, et al. A long-term follow-up study of nonsubmerged ITI implants in the treatment of totally edentulous jaws: Part 1: ten-year life table analysis of a prospective multicenter study with 1286 implants. Clin Oral Implants Res 2002;13(3):260.273.
Chiapasco M, Gatti C, et al. Implant-retained mandibular overdentures with immediate loading: a retrospective multicenter study on 226 consecutive cases. Clin Oral Implants Res 1997;8(1):48.57.