Date on Master's Thesis/Doctoral Dissertation


Document Type

Master's Thesis

Degree Name



Oral Biology

Degree Program

Oral Biology, MS

Committee Chair

Scarfe, William.C.

Committee Co-Chair (if applicable)

Azevedo, Bruno

Committee Member

Harris, Bryan T.

Committee Member

Lin, Wei-Shao

Author's Keywords

maxillary dental implants; CBCT; facial alveolar bone; no radiographic evidence of bone


Aim: To quantify the radiographic presence and thickness of facial alveolar bone (FABr) adjacent to implants placed in the anterior maxillary region. Lack of FABr may suggest that graft procedures are desirable prior to implant placement. Material and Methods: With IRB approval, a retrospective analysis of cone beam computed tomographic cross-sectional images of sites with at least one implant in the anterior maxillary region was performed. Details regarding type of implant and location were recorded. FABr perpendicular to the long axis each implant was measured at seven levels by two observers independently and means and standard deviations calculated. Inter-observer variability was determined using the Dahlberg formula. The percentage of sites with no FABr at each level was compared between sex, implant type and location using Fisher’s Exact test (p ≤ 0.05). Results: 55% of all implants have no FABr at the implant/abutment interface. FABr thickness is greater in the apical as compared to the cervical half of all implants (p=0.04). Edentulous spaces restored with tapered implants showed greater radiographic FABr in the apical region than with parallel implants (p=0.04). Conclusion: The majority of implants in the anterior maxilla have no FABr long term at the implant/abutment interface. Long term implant FABr depends on implant type and may contribute to esthetic compromise.