Differences in static cortical bone remodeling parameters in human mandible and iliac crest

Area of Science:

• Oral biology
• Bone histology
• Dental implantology

Background:

• Understanding bone turnover is crucial for oral rehabilitation.
• Iliac crest biopsy is a conventional method, but its relevance to jawbone is unclear.

Purpose of the Study:

• Compare static bone remodeling parameters in the mandible and iliac crest.
• Establish baseline mandibular bone values.
• Test the hypothesis of bone remodeling site specificity.

Main Methods:

• Autopsy bone specimens from 50 subjects (mean age 64 years).
• Sampling from iliac crest, jaw angle, and foramen mentale.
• Measurement of cortical porosity, eroded/formative sites, osteonal/Haversian canal diameters, and wall width on undecalcified sections.

Main Results:

• Mandibular bone showed lower cortical porosity, eroded, and formative sites than iliac crest.
• Cortical porosity in the foramen mentale was higher with occlusion.
• Mandibular parameters (osteonal diameter, Haversian canal diameter, wall width) were correlated within the mandible but not with the iliac crest.

Conclusions:

• Static bone remodeling parameters exhibit site specificity between the mandible and iliac crest.
• Mandibular bone remodeling is influenced by local factors, including functional occlusion.
• Local bone environment is a more significant determinant of bone response in dental interventions than general bone turnover.