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The International Journal of Oral & Maxillofacial Implants
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Int J Oral Maxillofac Implants 35 (2020), No. 2     10. Mar. 2020
Int J Oral Maxillofac Implants 35 (2020), No. 2  (10.03.2020)

Page 342-349, doi:10.11607/jomi.7784, PubMed:32142571


Occlusal Migration of Teeth Adjacent to Implant Prostheses in Adults: A Long-Term Study
Polymeri, Angeliki / Li, Qing / Laine, Marja L. / Loos, Bruno G. / Wang, Hom-Lay
Purpose: To evaluate the effect of continuous tooth eruption on the outcomes of single-implant–supported restorations in the anterior maxilla of adults.
Materials and Methods: Seventy-six patients (age: 21 to 78 years) treated with single-implant–supported restorations in the esthetic zone were included. Radiographs obtained at crown placement and follow-up examinations from 1 to 15 years postloading were analyzed with regard to vertical incisal plane changes of the implant-supported crown relative to adjacent teeth.
Results: Infraocclusion increased over time by 0.08 ± 0.02 mm/year. Infraocclusion was more pronounced (P = .04) for delayed (0.09 mm/year) versus immediate implant placement (0.06 mm/year) and for younger versus older adults (0.0013 mm/year per additional year of age; P = .014). No statistically significant association between infraocclusion and sex, ethnicity, implant site, timing of implant temporization, surgical protocol, and type of restoration was found.
Conclusion: Infraocclusion of single-implant–supported maxillary anterior restorations may result in esthetic concerns over time. Greater infraocclusion occurs in delayed implant placement and in younger individuals.

Keywords: complication, esthetics, infraocclusion, infraposition, tooth eruption