Authors : Ehab A. Elsaih
Volume : 61
Issue : 1
Year : 2015
Page No : 8
Objective: The Purpose of this study was to investigate and compare the effect of different mandibular prosthesis; non-splinted implant overdenture (NSIOD), splinted implant overdenture (SIOD) with bar, distal extension removable partial denture (DERPD) and conventional complete denture (CCD) on the antagonist maxillary edentulous arch anterior bone resorption. Materials and methods: Twenty four patients were selected with maxillary edentulous arches against different mandibular prosthesis. According to the mandibular prosthesis the patients were grouped as follows; six patients had NSIOD, six patients had SIOD, six patients had bilateral DERPD and six patients had CCD. Standardized digital panoramic radiographs for each patient at prosthetic delivery and five years later were traced and compared for bone resorption ratio in the anterior maxilla. Results: The mean anterior maxillary bone resorption ratio (AMaxRR) results revealed that in the NSIOD, SIOD, DERPD and CCD groups ongoing resorption of the anterior maxilla had occurred during the 5-years evaluation period, which was significant for DERPD compared to all groups and both SIOD and NSIOD groups compared to CCD group. However, between NSIOD and SIOD groups the results showed insignificant difference. Conclusions: Within the limitation of this study it could be concluded that; 1) maxillary bone resorption continue through time especially anteriorly, 2) absence of clinical evidence that maxillary ridge resorption is accelerated with certain types of two-implant supported mandibular overdenture attachments; 3) for edentulous maxilla the AMaxRR sho