(PO-003) Assessment of Implant Angulation of Mandibular First and Second Molars

Author: Nicholas Dubina – A.T. Still University Missouri School of Dentistry & Oral Health
Author: Nicholas Tran – A.T. Still University Missouri School of Dentistry & Oral Health
Author: Hesham Abdulkarim, BDS, MSD, DICOI – A.T. Still University Missouri School of Dentistry & Oral Health
Submitter: Hesham Abdulkarim, BDS, MSD, DICOI – A.T. Still University Missouri School of Dentistry & Oral Health

Objectives: To evaluate and compare the lingual inclination of virtually placed and restored dental implants at first and second mandibular molar implant sites.

Methods:
-Virtually placed and restored dental implants utilizing CBCTs planning software were included if they met the following criteria:
-  At least one pair of missing Adjacent first and second molars should be available
-  All implants placed should be at least 5mm in diameter
-  Implants must be within bone with at least 1 mm of bone thickness buccally.
- The Angles between the Abutment and the Implant Bisecting lines were measured and compared for adjacent first and second mandibular molars implant sites.
 

Results:
- Total of 32 patients and 44 implant pairs in the sample were included, 20 patients (63%) contributed one implant pair, and 12 patients (38%) contributed two implant pairs
- The median angle for the first molar is 8.0 and for the second molar is 21.0 and the difference is 12.5  
- Overall, the angle for the second molar is 2.5 times the angle of the first molar (P < .001)
- Although males may have slightly higher angles, but was not statistically significant (P >.40)

Conclusions:
-  The second molar implants were always more lingually tilted than the first molar implants to avoid the sublingual concavity
- Placing dental implants past the mandibular first molar region should be done sparingly.