Ridge Dimensions of the Edentulous Mandible in Posterior Sextants: An Observational Study on Cone Beam Computed Tomography Radiographs.
OBJECTIVE
To evaluate the ridge dimensions of posterior sextant in totally edentulous mandibles.


METHODS
Cone beam computed tomography scans of 136 patients were retrospectively included for analysis. At sites corresponding to the second premolar (site a) and the mesial and distal root of first molar (sites b and c, respectively), bone height (BH) and bone width (BW) were measured.


RESULTS
BH significantly decreased from site a (11.20 ± 4.03 mm) to site c (10.28 ± 3.33 mm). Males showed a significantly higher BH compared with females at all sites (P < 0.001), No significant impact of age on BH was found. BW increased from coronal to apical at all sites. At all height levels, BW increased from mesial to distal (BWc > BWb > BWa).


CONCLUSIONS
BH decreased from mesial to distal, whereas BW showed an increase. Sex showed a significant impact on BH, with males having on average a 2.8 mm greater height than females, but not on BW. Age did not significantly influence the dimensions of the residual bone crest.
*Researcher, Dental Clinic, School of Dentistry, Department of Neurosciences, University of Padova, Padova, Italy. †Research Fellow, Dental Clinic, School of Dentistry, Department of Neurosciences, University of Padova, Padova, Italy. ‡PhD Student, Research Centre for the Study of Periodontal and Peri-Implant Diseases, University of Ferrara, Ferrara, Italy; Operative Unit of Dentistry, University-Hospital of Ferrara, Ferrara, Italy. §Part-time Faculty, Department of Prosthodontics, Dental Clinic, School of Dentistry, University of Milan, Milan, Italy. ¶Researcher, Research Centre for the Study of Periodontal and Peri-Implant Diseases, University of Ferrara, Ferrara, Italy; Operative Unit of Dentistry, University-Hospital of Ferrara, Ferrara, Italy. ‖Associate Professor, Department of Periodontology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden.
Eriberto
E
Bressan
Nadia
N
Ferrarese
Mattia
M
Pramstraller
Diego
D
Lops
Roberto
R
Farina
Cristiano
C
Tomasi
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000539:Alveolar Process / Q000000981:diagnostic imaging* / Q000473:pathology; D054893:Cone-Beam Computed Tomography / Q000379:methods; D005260:Female; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011861:Radiography, Dental; D012189:Retrospective Studies