Abstract

ARISTIZABAL-HOYOS, JA et al. Resorption of the posterior alveolar ridge after 7 years of wearing a mandibular overdenture. Av Odontoestomatol [online]. 2022, vol.38, n.4, pp.143-150.  Epub Feb 06, 2023. ISSN 2340-3152.  https://dx.doi.org/10.4321/s0213-12852022000400003.

The overdenture retained by two implants is an option for the rehabilitation of edentulism, but its effect on the maintenance of the posterior alveolar ridge has not been studied in depth.

The objective of this work was to determine the changes in height of the mandibular posterior alveolar ridge after 7 years of the use of a mandibular overdenture. This descriptive study considered 17 patients. Each patient had received a mandibular overdenture retained by two non-splinted implants immediately loaded and joined by ball adjustments. Measurements were made in two panoramic radiographs (one taken before the insertion of the overdenture [T0] and another seven years later [T7]), for the lines the area was expressed as a posterior triangle formed by the gonion, the lower edge of the mental hole and a point that was the center of the gonion triangle - mental foramen - sigmoid notch. The measured area was compared to the triangular area on the same side. The results in mm with statistical significance (p< 0.05) were: bone reference area “X”( [T0]:494.3- [T7]:431.6) left bone reference area ([T0]:502.0 -[T7]: 405.3) and the posterior area index ([T0]:1.4-[T7]:1.2). The results in mm without statistical significance (p>0.05) indicated: right “X” bone reference area ([T0]:486.1 - [T7]:458.0), left “Y” reference area ([T0]:354.8-[T7]:360.6), right ([T0]:361.9-[T7]:375.6) and average ridge length maxilla ([T0]:35.4-[T7]:36.9). The resorption of the alveolar ridge after 7 years was within normal parameters, there would be no harmful effect of the overdenture on this ridge.

Keywords : Alveolar process; Implant-Supported Dental Prosthesis; Dental Implant-Abutment Design; Panoramic Radiography.

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