Purpose: To evaluate and compare the implant survival rates, marginal bone loss, and mechanical complications of prostheses supported by splinted and nonsplinted short implants (≤8.5 mm). Material and Methods: Electronic database (MEDLINE, CENTRAL, Web of Science, and EMBASE) and manual searches up to May 2021 were conducted to identify studies comparing splinted and nonsplinted short implants (≤8.5 mm). The primary outcome was implant survival rate. Secondary outcomes were marginal bone loss and mechanical complications. The quality of included studies and risk-of-bias were assessed according to the Newcastle-Ottawa Scale. A random-effects model was used to analyze the data. Results: Twelve studies fulfilled the inclusion criteria and featured 1506 short implants (596 nonsplinted and 910 splinted) with a follow-up time ranging from 1 to 16 years. Quantitative analysis found no statistically significant differences between splinted and nonsplinted short implants (≤8.5 mm) for survival rate (RR = 0.98; 95% CI 0.96, 1.01; p = 0.26)) and marginal bone loss (SMD = -0.08; 95% CI -0.23, 0.07; p = 0.28). Veneer chipping, abutment screw breakage, screw loosening, and loss of retention were reported in the selected studies as common complications. However, no statistically significant difference was found between splinted and nonsplinted short implants (RR = 0.56; 95% CI 0.20, 1.54; p = 0.26). Conclusions: Within the limitations of the present meta-analysis, it might be concluded that splinted short implants (≤8.5 mm) do not present superior performance in survival rate, marginal bone maintenance and prevention of mechanical complications compared with single-unit prostheses.Although the exact definition remains controversial, 1-3 short dental implants have been proven to be an acceptable solution for patients with limited alveolar bone height, which could substantially reduce treatment procedures, time, cost, and postoperative complications. 4,5 The survival rate of short implants is considered to be affected by a variety of factors. Implant factors include the lengths and surface treatments of implants and implant-abutment connection design. 6 Surgical and prosthetic factors include implant position (maxilla or mandible), surgical trauma, loading, etc. 6,7 Moreover, it is worth noting that selection of a suitable rehabilitation modality for short implants is also considered a crucial factor to maintain the long-term stability and success of short implants. 8