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Volume 34 , Issue 1
January/February 2019

Pages 141149


Comparative Study of Immediate Loading on Short Dental Implants and Conventional Dental Implants in the Posterior Mandible: A Randomized Clinical Trial

Kritsada Weerapong, DDS/Siripong Sirimongkolwattana, DDS, MSc/Thanapat Sastraruji, PhD/Pathawee Khongkhunthian, DDS, Dr Med Dent


PMID: 30521662
DOI: 10.11607/jomi.6732

Purpose: Immediate dental implant loading has been investigated with favorable results. However, short implants have not been investigated in this treatment option. This study compared the clinical outcomes and survival rates of immediately loaded short and conventional-length dental implants in replacing mandibular molar teeth. Materials and Methods: Forty-six implants (23 short dental implants and 23 conventional dental implants) in 46 patients were included in the study. Provisional computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic crowns were cemented to the abutments and immediately loaded. Several clinical parameters were recorded and statistically analyzed at 4-month and 1-year follow-up. Results: Two short implants lost integration, and one conventional implant failed. No statistically significant difference between the two implant types was found (P = 1.00). Minor complications were recorded; three provisional crown fractures were found in the short implant group and two provisional crown fractures in the conventional implant group. There was no significant difference in implant stability quotient values for short or conventional implants between baseline (short: 73.86 2.38, conventional: 75.05 3.26, P = .088), 4 months after loading (short: 72.37 1.35, conventional: 72.89 1.87, P = .165), and 1 year after loading (short: 74.60 2.03, conventional: 75.35 2.66, P = .296). The mean marginal bone level loss 4 months postloading was 0.28 0.29 mm for short implants and 0.25 0.25 mm for conventional implants (P = .73), and at 1 year postloading was 0.33 0.47 mm for short implants and 0.26 0.27 mm for conventional implants (P = .554); there was no statistical difference between the two implant types. Conclusion: The immediate loading of short implants is comparable to conventional-length implants in terms of implant survival, marginal bone level change, and implant stability quotient value.


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