A two-dimensional stress analysis comparing fixed prosthodontic approaches to the tilted molar abutment.
A two-dimensional finite element method was used to analyze the changes in mechanical behavior of the supporting structures when a fixed prosthesis replaced a mandibular first molar. In the unrestored situation, as the degree of bone resorption increased there was a corresponding increase in stress in the periodontium. Tilting of the molar abutment induced additional stress on the mesial side of the root. The presence of a fixed prosthesis markedly reduced the magnitude and distribution of stress in the periodontium. The mechanical advantage obtained by a fixed prosthesis was greater in the situation of a tilted second molar with reduced bone support than with higher bone levels.
Yang
H S
HS
College of Dentistry, Chonnam National University, Kwang-ju, Korea.
Thompson
V P
VP
D016301:Alveolar Bone Loss / Q000503:physiopathology*; D001732:Bite Force; D003442:Crowns; D000044:Dental Abutments; D003799:Dental Stress Analysis / Q000379:methods*; D003830:Denture, Partial, Fixed; D006801:Humans; D008961:Models, Structural; D008963:Molar / Q000503:physiopathology; D010519:Periodontium / Q000503:physiopathology; D013314:Stress, Mechanical