الفهرس 
AbstractOnly 14 pages are availabe for public view
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Abstract
This cross over “within patient” study was conducted to compare between different implant number and distribution used for assisting maxillary complete overdenture regarding the peri-implant interleukin-1β activity. Materials and Methods: Six completely edentulous patients were selected to receive conventional complete dentures. Four implants were installed in the maxillary alveolar ridge; two vertically parallel in the canine areas and two distally inclined in the premolar areas. At the second surgery, two patients started with loading the canine implants only (group A), two patients started with loading the premolars implants only (group B); and two patients started with loading the four implants (group C). After six months, each patient was converted from group to another with 2 weeks rest period. All implants were attached to the maxillary overdentures through OT-Equator attachments. Evaluation of peri-implant tissue through measuring the interleukin-1β values in the peri-implant sulcular fluid was done 2 weeks (T0), 3 months(T1) and 6 months(T2) after insertion of definitive overdenture for each group. Results: interleukin-1β values significantly increased with advance of time for all groups. There was a significant difference between T0 and T2 only. A statistically insignificant difference was observed between T0 and T1, and between T1 and T2. Conclusions: Within the limitation of this short term study, it is possible to conclude that: the clinical tissue changes and biochemical parameters revealed a biologically accepted peri-implant health around either two or four implants retaining the maxillary overdenture. It could be advised that the use of four implants to assist maxillary overdentures is preferred than two implants only regardless the position of the implants.