CAMLOG and Science

CAMLOG&Science – Chapter 5 CONDITIONALLY REMOVABLE BRIDGES Implant-supported bridges with galvano elements are clinically successful and can be reliably removed at the scheduled times, as a retrospective ana- lysis in 45 patients over five years demonstrated (Xiang et al. 2010, 2011). Fifty-five bridges were placed on 353 implants. On average, seven implants were placed in the maxilla, six in the mandible. After a mean observation period of slightly more than four years, the cumulative implant survival rate was 99%. According to the authors, galvano elements combine the benefits of screw-retained fixation and cementation, in addition, the use of an electro- formed substructure allows long-term retention, while the suprastructure can be removed again at any time. The research group also evaluated pati- ent satisfaction and treatment successes of 118 implant-supported galvano bar prostheses placed on five to six implants in the maxilla and four in the mandible after an average period of three years (Nelson et al. 2006). Only seven of 568 implants were lost, i.e., the success rate was 99%. The prosthetic seats were stable in 93%, only 7% showed slight movements during unilateral loads. 85% experienced no mechanical complications. Patient satisfaction was very high (97%). PATIENT PREFERENCE AND SATISFACTION Patient satisfaction must be regarded as one of the most important factors for the success of the chosen treatment concept. A plenum of projects has evaluated the oral health-related quality of life including four or less implants in the edentulous maxilla or mandible. Comparing the patient preferences between implant-retained overdentures attached either with locator or with ball anchor in 20 edentulous patients, Krennmair et al. (2012b) noted that patient satisfaction was significantly improved between baseline and the new restoration (p<0.05), however, no significantly difference was observed between the prosthesis. Wolfart et al. (2012) reported the effect of strategic implant placement under removable partial or full prosthesis in 23 patients. Patients who had either removable partial dental prostheses or a complete dental prostheses received additional implant-supported ball abutments. The existing prosthesis was adapted to the additional point of retention. The Oral Health Profile ques- tionnaire (49 Questions) was completed by patients over time (up to 12 months). The authors concluded that increasing the number of abutments improved quality of life related to the oral health (OHRQoL). Karabuda C, Yaltirik M, Bayraktar M. (2008) A clinical comparison of prosthetic complications of implant-supported overdentures with different attachment systems. Implant Dent 17(1): 74-81 Krennmair G, Weinländer M, Krainhöfner M, Piehslinger E. (2006a) Implantatgetragene Deckprothesen im Unterkiefer auf Kugelge- schieben oder Teleskopkronen – eine prospektive Dreijahresstudie. Implan- tologie 14: 235-43 Krennmair G, Weinländer M, Krainhöfner M, Piehslinger E. (2006b) Implant-supported mandibular overdentures retained with ball or telescopic crown attachments: a 3-year prospective study. Int J Prosthodont 19(2): 164-70 REFERENCES Buser D, Ingmarsson S, Dula K, Lussi A, Hirt HP, Belser UC. (2002) Long-term stability of osseointegrated implants in augmented bone: A 5-year prospective study in partially edentulous patients. Int J Periodontics Restorative Dent 22(2): 108-17 De Lange GL, Randelzhofer P, Sipos P, de Bruyn M, Both CJ. (2010) Survival and risks of immediately placed anterior implants, Poster 19th Annual Scientific Meeting EAO Glasgow, October 6-9, 2010 Franchini I, Capelli M, Fumagalli L, Parenti A, Testori T. (2011) Multicenter retrospective analysis of 201 consecutively placed Camlog dental implants. Int J Periodontics Restorative Dent 31(3): 255-63 SUMMARY Clinical studies have reported high success rates with the sand- blasted and acid-etched Promote ® surface for single restorations, in partially edentulous patients, and in edentulous jaws. Implant type, diameter or length, time point of implantation or time of loading did not show significant influence on the implant survival rates.