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Implant Placement under Existing Removable Dental Prostheses and the Effect on Follow‐Up and Prosthetic Maintenance
Author(s) -
Marotti Juliana,
Gatzweiler Bodo,
Wolfart Mona,
Sasse Martin,
Kern Matthias,
Wolfart Stefan
Publication year - 2019
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.12943
Subject(s) - dentistry , implant , maxilla , medicine , survival rate , dental prosthesis , orthodontics , dental abutments , surgery
Purpose The aim of this prospective clinical study was to compare the maintenance interventions required for solely implant‐retained overdentures (I‐OD) with that of overdentures retained by a combination of telescopic crowns and implants (T/I‐OD). Materials and methods The participants in this study were 22 patients who initially presented either with a removable complete denture (n = 11) or with an overdenture retained by 1 to 2 telescopic crowns on natural teeth (n = 11). Subsequently, the total number of abutments was increased to 5 to 6 (maxilla) or 4 to 5 (mandible) by placing implants in strategically advantageous regions, generating two distinct groups: I‐OD and T/I‐OD. Ball attachments were connected to the implants and integrated into the existing denture. The maintenance aspects were analyzed according to the type of treatment (preventive, biological, and technical) and to the severity of treatment (minimal, moderate, and extensive). Results During a mean observation time of 6.5 years, the tooth survival rate was 89% (T/I‐OD) and the implant survival rate 100% (both groups). The survival rates of the overdentures ranged from 90.9% (I‐OD) to 100% (T/I‐OD). A mean number of 0.6 (I‐ODs) and 2.0 (T/I‐OD) treatments were performed for biological reasons; and 8.2 (I‐ODs) and 9.6 (T/I‐OD) for technical reasons, per patient, during the observation time. From biological aspects, significantly more extensive maintenance was found to be necessary in the T/I‐OD group than in the I‐OD group. Conclusions The therapeutic concept of implant placement under existing prostheses was promising when performed in indicated cases.