hrvatski

Mini dental implants in strategic positions as additional support of removable partial dentures - the 2-years longitudinal study

Aim: Most patients without all posterior teeth are mostly treated with removable partial dentures (RPDs) retained by clasps or attachments, but treatment possibilities for the Kennedy Class I patients include more different options: implant retained or implant assisted RPDs or fixed partial dentures on implants. Placement of standard size implants for retention and better stability of RPDs has already shown benefits. However, no studies have been conducted on whether slim implant (Mini dental implants, MDIs) can be used for better retention and stability of long saddle RPDs and what long-term effects would such treatment provide. The aim of this study was to evaluate clinical and radiographic performance of MDIs in strategic positions to retain and support RPDs. Materials and Methods: A convenience sample of 52 patients of Kennedy Class I without all posterior teeth providing only linear support to a denture with slim alveolar ridges (<5 mm) were included. Two MDIs (2.0-2.5 mm wide, 10-14 mm long) inserted adjecent to the last tooth or at one-tooth width posteriorly changed linear into more favorable polygonal denture support. The marginal bone loss (MBL) at the mesial and distal side was assessed on periapical and/or panoramic radiographs. Implant success and survival rates, technical difficulties and patient centered outcomes were assessed. Patients filled in 3 questionnaires: OHIP14, chewing function questionnaire (CFQ) and orofacial esthetic scale (OES) at baseline, at the one-year control exam, and in 36 patients at the 2-years appointment. Result: Four implants were lost before loading, but were substituted, one failed again and that patient was excluded, finally 128 implants were loaded (97, 4% surgical success). Three patients lost one MDI each after 1 year in the maxilla. Four MDIs were further lost in the maxilla and three in the mandible after 2 years. The survival rate of loaded implants was 92%, total survival rate 91.2% (2.8% early implant loss + 6% late implant loss). At the 1-year follow-up MBL ranged from 0.0 - 1.8 mm ; at the 2-years from 0.0 – 2.4 mm (36 patients). No denture fractures were reported. At the 1st year examination 2 matrix and 4 o-rings were lost and replaced ; at the 2st year examination 3 more matrices and 8 o-rings were lost and replaced. After the treatment the OHRQoL, aesthetics and chewing function significantly improved and remained consistent. Conclusion: The MDI retained RPD is a feasible treatment option in partially edentulous patients with slim alveolar ridges, however more years of observation are necessary to approve the protocol.

mini dental implants ; removable partial dentures

nije evidentirano

engleski

Mini dental implants in strategic positions as additional support of removable partial dentures - the 2-years longitudinal study

Aim: Most patients without all posterior teeth are mostly treated with removable partial dentures (RPDs) retained by clasps or attachments, but treatment possibilities for the Kennedy Class I patients include more different options: implant retained or implant assisted RPDs or fixed partial dentures on implants. Placement of standard size implants for retention and better stability of RPDs has already shown benefits. However, no studies have been conducted on whether slim implant (Mini dental implants, MDIs) can be used for better retention and stability of long saddle RPDs and what long-term effects would such treatment provide. The aim of this study was to evaluate clinical and radiographic performance of MDIs in strategic positions to retain and support RPDs. Materials and Methods: A convenience sample of 52 patients of Kennedy Class I without all posterior teeth providing only linear support to a denture with slim alveolar ridges (<5 mm) were included. Two MDIs (2.0-2.5 mm wide, 10-14 mm long) inserted adjecent to the last tooth or at one-tooth width posteriorly changed linear into more favorable polygonal denture support. The marginal bone loss (MBL) at the mesial and distal side was assessed on periapical and/or panoramic radiographs. Implant success and survival rates, technical difficulties and patient centered outcomes were assessed. Patients filled in 3 questionnaires: OHIP14, chewing function questionnaire (CFQ) and orofacial esthetic scale (OES) at baseline, at the one-year control exam, and in 36 patients at the 2-years appointment. Result: Four implants were lost before loading, but were substituted, one failed again and that patient was excluded, finally 128 implants were loaded (97, 4% surgical success). Three patients lost one MDI each after 1 year in the maxilla. Four MDIs were further lost in the maxilla and three in the mandible after 2 years. The survival rate of loaded implants was 92%, total survival rate 91.2% (2.8% early implant loss + 6% late implant loss). At the 1-year follow-up MBL ranged from 0.0 - 1.8 mm ; at the 2-years from 0.0 – 2.4 mm (36 patients). No denture fractures were reported. At the 1st year examination 2 matrix and 4 o-rings were lost and replaced ; at the 2st year examination 3 more matrices and 8 o-rings were lost and replaced. After the treatment the OHRQoL, aesthetics and chewing function significantly improved and remained consistent. Conclusion: The MDI retained RPD is a feasible treatment option in partially edentulous patients with slim alveolar ridges, however more years of observation are necessary to approve the protocol.

mini dental implants ; removable partial dentures

nije evidentirano