IADR Abstract Archives

Intraindividual TMJ Side Differences of Posterior Disclusive Angles

Objective: Intraindividual left-right side sagital condylar inclination differences less than 5° have been reported as normal. However, the literature is not conclusive on the issue. The purpose of this study was to investigate the  left-right temporomandibular condyle differences of the sagital condylar inclination and Bennett angle.

Method: Forty seven subjects with Angle Class I occlusion (age 21-31, mean 24,9), with no previous orthodontic treatment and no signs and symptoms of TMD were included. Recordings were obtained by an electronic ultrasound measuring device (Arcus Digma II, Kavo, Germany), using the kinematic axis as posterior reference point. Each subject had to make three protrusive, right and left lateral movements, from which the computer calculated left and right sagital condylar inclination and Bennett angle values.


Mean sagital condylar inclination was 41,7° for the left, and 42,5° for the right joint, relative to Camper's plane. Mean Bennett angle was 7,3° for left, and 9,0° for right joints. Intraindividual left-right side differences of posterior disclusive angles are shown in the following table.



Bennett angle

Sagital Condylar Inclination

Mean L-R difference (n=47) (degrees)



No of participants with L-R difference < 3°



No of participants with 3,1°-6,0° L-R difference



No of participants with 6,1°-10,0° L-R difference



No of participants with difference >10,1°



Conclusion: The results of this study suggest that posterior disclusive angles differences greater than 5° can be considered normal (36% of participants for the sagital condylar inclination, and 26% for the Bennett angle showed L-R TMJ differences larger than 6°). Due to large intraindividual variations which can affect articulator setup values and thus the precision of removable and fixed prostheses fabrication, individual recording of articulator setup values can be recommended.

IADR/AADR/CADR General Session
2013 IADR/AADR/CADR General Session (Seattle, Washington)
Seattle, Washington
Prosthodontics Research
  • Cimic, Samir  ( University of Zagreb, Zagreb, , Croatia )
  • Kraljevic Simunkovic, Sonja  ( University of Zagreb, Zagreb, N/A, Croatia )
  • Badel, Tomislav  ( University of Zagreb, Zagreb, , Croatia )
  • Dulcic, Niksa  ( School of Dental Medicine, University of Zagreb, Zagreb, , Croatia )
  • Catic, Amir  ( School of Dental Medicine, University of Zagreb, Zagreb, , Croatia )
  • Poster Session
    Occlusion & Mastication