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Volume 28 , Issue 5
September/October 2013

Pages 12931299


Retrospective Results of Implants for Partially Edentulous Posterior Jaws According to Time Points of Early Loading

Jong-Hwa Kim, DDS/Jin-Yong Yang, DDS, MSD, PhD/Young-Kyun Kim, DDS, MSD, PhD/Young-Ku Heo, DDS, MSD, PhD/In-Sung Yeo, DDS, MSD, PhD


PMID: 24066320
DOI: 10.11607/jomi.2884

Purpose: This study evaluated the survival and success rates and marginal bone loss conditions of early loaded implants in the posterior maxilla and mandible of partially edentulous patients. Materials and Methods: Implants (n = 299) were placed in 105 patients at two research centers. Provisional fixed dental prostheses were provided to the patients between 1 week and 2 months after implant placement. The implants were classified into four groups according to the loading time (1 to 2, 2 to 4, 4 to 6, and 6 to 8 weeks). Periapical radiographs were taken via a parallel imaging technique, and the peri-implant marginal bone level was measured on the radiographic images. Results: Most implants were lost within 1 month, and one implant was removed at 36 days after loading. The cumulative survival rate of the implants was 97.0%. Implants loaded in the maxilla at 1 to 2 weeks after prosthesis insertion had significantly lower survival rates than any other group (P = .013). There were no significant differences in marginal bone levels among the implant groups classified according to loading time. Conclusions: Early loading is a safe and predictable procedure for implant-supported restoration of posterior partial edentulism. However, care must be taken in early loading within 2 weeks after maxillary implant insertion.


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