Inclusion criteria for the JC group were the medical indication for NICO surgery in these patients based on orthopantomogram X-rays (two-dimensional) and an additional cone beam X-ray (three-dimensional), and multiple and irregular remnants of lamina dura present in a subtle radiolucent background, leading to the suspicion of the presence of JC. The definite indication for NICO surgery is from the complementary evaluation of additional measurement of bone density by TAU. Demographic data of the 31 cases in the NICO cohort were average age (57.1 years, range 36–86 years) and sex (female:male 21:10).
Additionally, we collected tissue samples from the normal jawbones of three patients who gave their consent for bone specimen collection during implantation and analysis. Inclusion criteria for this cohort were no radiographic evidence of NICO and inconspicuous measurement of bone density by TAU. Patients showed no systemic health risks.