Objective: To evaluate marginal bone loss (MBL) around short dental implants supporting single screw-retained crowns and to compare the clinical performance of two abutment types in a retrospective cohort.

Materials and Methods: This retrospective study included patients restored with short 8mm bone level implants supporting single screw-retained crowns. Two abutment types were compared: Type A: a casted type one piece abutment, Type B: a multiunit abutment. Standardized periapical radiographs were analyzed to measure MBL at the mesial and distal aspects using a calibrated digital method. Crown-to-implant ratio, implant diameter, implant position, and follow-up interval were recorded. Statistical analysis was performed to compare MBL between abutment groups and assess correlations with implant-related variables.

Results: Short implants restored with single screw-retained crowns demonstrated stable peri-implant bone levels during the follow-up period. Preliminary analysis showed a measurable difference in mean MBL between the two abutment groups. Crown-to-implant ratio did not show a statistically significant association with MBL. Implant diameter and position displayed variable correlation with bone changes.

Conclusion: Short implants supporting single screw-retained crowns yield predictable outcomes with minimal marginal bone loss. Abutment type may influence MBL patterns, highlighting the importance of prosthetic selection in short-implant rehabilitation.