Radiographic changes of trabecular bone density after loading of implant‐supported complete dentures: A 3‐year prospective study

Abstract

Background Bone tissues may undergo remodeling under functional mechanical stimuli. Purpose This prospective study on implant‐supported fixed complete dentures (IFCDs) evaluated the radiographic trabecular bone changes in density by means of gray levels and texture analysis variables after up to 3‐year loading. Materials and Methods The sample consisted of digital periapical radiographs of 63 distal implants of hybrid IFCDs installed in 30 patients (22 women, mean age of 62 ± 7.8 years). Digital periapical radiographs were taken after prosthesis installation, and 1 and 3 years after IFCD loading. Longitudinal images of each implant were superimposed, and the same regions of interest were selected for measurement of gray levels statistics (mean gray levels, SD, and coefficient of variation [CV]) and texture parameters (correlation, contrast, entropy, and angular second moment). Data were analyzed by mixed regression models. Results Mean gray levels increased for 1 year (P < .05), for 3 years (P < .01) and for maximum bite force (P < .01). The interaction between bruxism and time in 1 year was significant (P < .01) for a decrease in CV. No significant effect of texture analysis variables was found (P > .05). Conclusions The results suggest an increase of radiographic bone density as measured by an increase in mean gray levels and a decrease in CV in IFCD distal implants up to 3 years of loading.

Changes of Radiographic Trabecular Bone Density and Peri-Implant Marginal Bone Vertical Dimensions Around Non-Submerged Dental Implants with a Laser-Microtextured Collar after 5 Years of Functional Loading.

“…Mechanical loading also increases bone volume fraction, the trabecular thickness and content, and alters trabecular morphology [30,31]. The results of the present study are in agreement with data published by Carneiro et al [32] and Gerhardtet al [11]who found a significant decrease in grey levels after 1 and 3 years of conventional implant loading. Different results have been reported by Mundim et al [33] and Appleton et al [34]who showed no statistical difference in bone density at subcrestal level after implant loading.…”

“…However, some key questions on the influence of each specific factor remain unanswered. Gerhardt et al suggested that occlusal stimuli may influence peri-implant bone remodeling around stable dental implants [11]. Peri-implant bone quantitative and qualitative characteristics could be modified by continuous cycles of microdamage and bone reparation that occur under functional loading [12 -14].…”

Traumatic Leg Fractures in UEFA Football Athletes: A Matched-Cohort Analysis of Return to Play, Reinjury, Player Retention, and Performance Outcomes

“… 3 , 23 , 36 With regard to risk of refracture, it is unknown whether the repetitive mechanical loading exposure during soccer training is protective, due to increased bone density under mechanical loading, or a risk factor, due to repetitive motion exposure. 11 Nonetheless, coaches limiting field time for their older defenders to protect them from refracture may be contributing to the observed decrease in field time for defenders. On the other hand, attackers and midfielders demonstrated no significant differences in field time after RTP.…”