COMPARISON OF STRESS DISTRIBUTION BETWEEN SHORT DISTAL IMPLANTS AND LONG ANGULATED IMPLANTS ON EDENTULOUS ATROPHIC MAXILLA IN ALL-ON-SIX TREATMENT CONCEPT: A 3D FINITE ELEMENT ANALYSIS STUDY

*Dr. Janak Kapadia (BDS., MDS.), Dr. Ravikumar Jirali (BDS., MDS.), Dr. Pallavi Kamble (BDS., MDS.), Dr. Gauri Ramesh Kumbhar, (BDS.)

ABSTRACT

The purpose of the study is to compare the distribution of stress between short distal implants and long angulated implants on edentulous atrophic maxilla in all-on-six treatment concept. Two three-dimensional models of edentulous atrophic maxilla with a full-arch of fixed dental prosthesis were prepared according to all-on-six treatment concepts. The first model is composed of implants at position #’s 5, 7, 10, 12 with dimension 4×11.5 mm and in #3 and #14 regions 5×7 mm with all axial placements. Whereas, the second model is composed of implants at position #’s 8, 9, 7, 10 with dimension of 4×11.5 mm having an axial placement and in #4 and #14 region 4×15 mm with 450 inclination distally. An oblique load of 150 N with 300 inclinations in the bucco-lingual direction was applied. The model analysis has been done by Ansys (Swanson Analysis Inc., Huston, PA, USA, Version 14.5) software. Consequently, the stress was more in the second model as was compared to first model. Considering all the values obtained in the study, the use of short or angulated implants at distal position gives nearly equal stress distribution.

Keywords: Edentulous atrophic maxilla, All-on-six treatment concept, Short implants, Long angulated implants, Finite element analysis.