Introduction
This study clinically evaluated early loaded short dental implants compared to early long dental implants assisting mandibular Kennedy Class I IARPDS with the implants placed once at the position of the missing first molar once at the position of the missing second molar.
Materials and methods
Twenty male patients, 30 to 60 years old, participated in this study and were blindly divided into 2 groups. The 10 patients of group I received one short one placed in the mandibular right edentulous space at the site of the missing first molar, and a long implant placed in the left distal extension space at the site of the missing first molar. Group II was made of the same number of patients but with the implants placed at the sites of the missing second molars. After one year of the IARPD loading the implants were evaluated for plaque index, pocket depth, mobility, vertical bone loss, and bone density profile.
Results
No significant differences were detected in plaque index, probing depth, mobility, or vertical bone loss between the implants in the two groups, however, group I implants had more bone density profile than group II implants, especially long implants as compared to short implants.

Conclusion
The long and short implants placed at the location of the missing first molars had more bone density profile values than those placed at the place of the missing second molars, and in both cases long implants showed better bone density profile than short implants.