Five years of aftercare of implant‐retained mandibular overdentures and conventional dentures

Abstract

The purpose of this multicentre randomized clinical trial was to analyse surgical and prosthetic aftercare and clinical implant performance of edentulous patients with implant-retained mandibular overdentures and of patients with conventional dentures, either or not after pre-prosthetic vestibuloplasty and deepening of the floor of the mouth. The evaluation period was 5 years. The implant systems evaluated were the IMZ implant system, the Brånemark implant system and the Transmandibular Implant system. The centre in Groningen had five groups (n=149) and the centre in Nijmegen had three groups (n=86). The evaluation comprised of surgical and prosthetic aftercare, together with clinical implant performance (CIP). The highest implant loss (29%) is found in the Transmandibular Implant group. All groups had prosthetic revisions and complications according to the CIP-scale. The majority of the patients in the endosseous implant groups were subject to minor complications. The CIP-score of the Transmandibular Implant group is significantly higher than the scores of the other groups, because of the high number of lost posts. In 26;1% of the patients in this group score 4 is given, which means failure of the implant system. From this study it can be concluded that the endosseous implant systems used in this study have less surgical aftercare and a better clinical implant performance than the Transmandibular Implant system and are therefore the systems of choice for the edentulous mandible.

Rehabilitation of head and neck cancer patients: aspects determining implant placement

“…This finding is comparable to the findings of Ernst et al 35 . In a recent study of Papi et al the type of radiotherapy (3D conform radiotherapy versus IMRT) does not seem to effect the amount of peri-implant bone loss 36 .…”

“…Active infection around implants occurred most frequently in the orbit and nasal regions, possibly due to local anatomy which makes cleaning in those regions more challenging. Irradiated patients showed more periimplant skin reactions in contrast to findings in the study of Visser et al 35 . To what extent these conflicting results are influenced by other factors such as selfcare and/ or the manufactured retention system, is unclear.…”

Rehabilitation of head and neck cancer patients: aspects determining implant placement

“…This finding is comparable to the findings of Ernst et al 35 . In a recent study of Papi et al the type of radiotherapy (3D conform radiotherapy versus IMRT) does not seem to effect the amount of peri-implant bone loss 36 .…”

“…Active infection around implants occurred most frequently in the orbit and nasal regions, possibly due to local anatomy which makes cleaning in those regions more challenging. Irradiated patients showed more periimplant skin reactions in contrast to findings in the study of Visser et al 35 . To what extent these conflicting results are influenced by other factors such as selfcare and/ or the manufactured retention system, is unclear.…”

Letters to the Editor

“…Detailed information is essential, since part of the aftercare may be technique-driven. We studied aftercare in greater detail over a 10-year period and, e.g., already mentioned that certain types of bars or clips had to be replaced by other types because of a high occurrence of failure during follow-up (Visser et al, 2006). confirmed that abutment design and the choice of material used for the retentive part of the matrix influenced the friction grip and thus the need for aftercare.…”

Mandibular overdentures supported by two Brånemark, IMZ or ITI implants: a ten‐year prospective randomized study

“…A new prosthetic treatment would be a satisfying solution. This was also an observation made by Visser et al (2006) when evaluating the patients' need for surgical and prosthetic care and aftercare related to an implant‐retained lower denture. During their assessment of the 10‐year follow‐up data, they became aware of the phenomenon that the need for prosthetic aftercare was rather minor during the 10‐year follow‐up, but that it was not uncommon that during the 11th and 12th year there was a need to renew this overdenture.…”

Rehabilitation of head and neck cancer patients: aspects determining implant placement

“…This finding is comparable to the findings of Ernst et al 35 . In a recent study of Papi et al the type of radiotherapy (3D conform radiotherapy versus IMRT) does not seem to effect the amount of peri-implant bone loss 36 .…”

“…Active infection around implants occurred most frequently in the orbit and nasal regions, possibly due to local anatomy which makes cleaning in those regions more challenging. Irradiated patients showed more periimplant skin reactions in contrast to findings in the study of Visser et al 35 . To what extent these conflicting results are influenced by other factors such as selfcare and/ or the manufactured retention system, is unclear.…”

Letters to the Editor

“…Detailed information is essential, since part of the aftercare may be technique-driven. We studied aftercare in greater detail over a 10-year period and, e.g., already mentioned that certain types of bars or clips had to be replaced by other types because of a high occurrence of failure during follow-up (Visser et al, 2006). confirmed that abutment design and the choice of material used for the retentive part of the matrix influenced the friction grip and thus the need for aftercare.…”

Mandibular overdentures supported by two Brånemark, IMZ or ITI implants: a ten‐year prospective randomized study

“…A new prosthetic treatment would be a satisfying solution. This was also an observation made by Visser et al (2006) when evaluating the patients' need for surgical and prosthetic care and aftercare related to an implant‐retained lower denture. During their assessment of the 10‐year follow‐up data, they became aware of the phenomenon that the need for prosthetic aftercare was rather minor during the 10‐year follow‐up, but that it was not uncommon that during the 11th and 12th year there was a need to renew this overdenture.…”

Rehabilitation of head and neck cancer patients: aspects determining implant placement

“…This finding is comparable to the findings of Ernst et al 35 . In a recent study of Papi et al the type of radiotherapy (3D conform radiotherapy versus IMRT) does not seem to effect the amount of peri-implant bone loss 36 .…”

“…Active infection around implants occurred most frequently in the orbit and nasal regions, possibly due to local anatomy which makes cleaning in those regions more challenging. Irradiated patients showed more periimplant skin reactions in contrast to findings in the study of Visser et al 35 . To what extent these conflicting results are influenced by other factors such as selfcare and/ or the manufactured retention system, is unclear.…”

Letters to the Editor

“…Detailed information is essential, since part of the aftercare may be technique-driven. We studied aftercare in greater detail over a 10-year period and, e.g., already mentioned that certain types of bars or clips had to be replaced by other types because of a high occurrence of failure during follow-up (Visser et al, 2006). confirmed that abutment design and the choice of material used for the retentive part of the matrix influenced the friction grip and thus the need for aftercare.…”

Mandibular overdentures supported by two Brånemark, IMZ or ITI implants: a ten‐year prospective randomized study

“…A new prosthetic treatment would be a satisfying solution. This was also an observation made by Visser et al (2006) when evaluating the patients' need for surgical and prosthetic care and aftercare related to an implant‐retained lower denture. During their assessment of the 10‐year follow‐up data, they became aware of the phenomenon that the need for prosthetic aftercare was rather minor during the 10‐year follow‐up, but that it was not uncommon that during the 11th and 12th year there was a need to renew this overdenture.…”