IADR Abstract Archives
Tomographic analysis of the bone surface of human mandibular condiles in total toothless patients.
According to actual knowledge in anatomy, physiopatology and biomechanics of the temporomandibular joint (TMJ), the articular bone surface of the condiles may be affected by the interaction between chronologic age and tooth loss, causing pathologies as to degeneration, reabsortion, osteoarthrosis, etc., and their possible restauration (bone remodelation). The objective of this work is to determine the incidence of gender, topographical grade and location of these affectations, through computed tomography (CT).
Twenty volunteers (12 women and 8 men, in average 66,7 years old), with total tooth loss and using complete rehabilitation for more than five years, participated. CT of frontal coronal cuts of right and left TMJs were made. The condilar articular surface (CAS) of fourty TMJs were analysed, distinguishing 40 medial articular surfaces (MAS) and 40 lateral articular surfaces (LAS), and quantifying the findings in I, II and III grade, according to the bone affectation of the CAS.
A) 28 MASs and LASs without cortical or bone marrow affectation (I Grade: 35%). Gender: 15 women (53,6%) and 13 men (46,4%). Topographical location: 11 MASs (39,2%) and 17 LASs (60,8%).
B) 52 MASs and LASs with cortical or bone marrow affectation (GII and GIII: 65%). Gender: 33 women (63,5%) and 19 men (36,5%). Affectation: II Grade in 27 CASs (51,9%), topographical location: 16 MASs (59,2%) and 11 LASs (40,8%); III Grade in 25 CASs (48,1%), topographical location: 13 MASs (52%) and 12 LASs (48%).
In the studied bone surfaces of condiles (MASs and LASs) there are more II grade and III grade cases than I grade ones. There difference between GII and GIII cases is 1,9 %. Affected MASs are more than affected LAS. The most affected CASs belong to women.
Key words: TMJ – Cortical bone – Bone marrow - CT
Twenty volunteers (12 women and 8 men, in average 66,7 years old), with total tooth loss and using complete rehabilitation for more than five years, participated. CT of frontal coronal cuts of right and left TMJs were made. The condilar articular surface (CAS) of fourty TMJs were analysed, distinguishing 40 medial articular surfaces (MAS) and 40 lateral articular surfaces (LAS), and quantifying the findings in I, II and III grade, according to the bone affectation of the CAS.
A) 28 MASs and LASs without cortical or bone marrow affectation (I Grade: 35%). Gender: 15 women (53,6%) and 13 men (46,4%). Topographical location: 11 MASs (39,2%) and 17 LASs (60,8%).
B) 52 MASs and LASs with cortical or bone marrow affectation (GII and GIII: 65%). Gender: 33 women (63,5%) and 19 men (36,5%). Affectation: II Grade in 27 CASs (51,9%), topographical location: 16 MASs (59,2%) and 11 LASs (40,8%); III Grade in 25 CASs (48,1%), topographical location: 13 MASs (52%) and 12 LASs (48%).
In the studied bone surfaces of condiles (MASs and LASs) there are more II grade and III grade cases than I grade ones. There difference between GII and GIII cases is 1,9 %. Affected MASs are more than affected LAS. The most affected CASs belong to women.
Key words: TMJ – Cortical bone – Bone marrow - CT