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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.