Abstract
The aims: The aims of this study were to evaluate the alveolar bone resorption
every 2.5mm distal to the implant over denture to the retromolar pad in the
mandibular arch, and to the maxillary tuberosity in the maxillary arch in edentulous
patient according to number between two and four, and position of implants
between canine and 2nd premolar. Materials and Methods: Eight patients (age
range 45-60 years) were selected from the department of Prosthodontics/ College of
Dentistry/Mosul University, who had at least one edentulous arch. All patients
complaining from poorly retention conventional acrylic complete denture due to the
residual ridge resoption, but the alveolar ridge height need at least 10mm implant
length.After completing the surgical steps of 26 implants (two or four implant
screw type titanium), over denture type with one step surgery for all implant types
were constructed in conventional method after one month healing period. The
prosthesis was delivered to the patients after one months of making the period
elapsed. Dentures were delivered without socket attachment(six months). For
assessment of alveolar bone height, for each patient panoramic exposure of OPG
was recorded – three times [base line(at time of placement) , 6 months and 12
months]. Results: Results of this study showed, that mean difference of bone
resoption range between [-0.2 –(-0.6)mm], and there was a significant difference of
bone resoption between base line and 12 months to p_x0001_0.05 according to number and
position of implants. Conclusions: The conclusion of this study showed that, there
was no significant different of alveolar ridge bone resoption between implants
number in two or four implants over denture or implant position.
