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KMID : 1023820120040030158
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The Journal of Advanced Prosthodontics
2012 Volume.4 No. 3 p.158 ~ p.161
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Mechanical analysis of conventional and small diameter conical implant abutments
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Izabela Cristina Mauricio Moris
Adriana Claudia Lapria Faria
Maria da Gloria Chiarello de Mattos
Ricardo Faria Ribeiro
Renata Cristina Silveira Rodrigues
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Abstract
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PURPOSE : The aim of the present study was to evaluate if a smaller morse taper abutment has a negative effect on the fracture resistance of implant-abutment connections under oblique compressive loads compared to a conventional abutment.
MATERIALS AND METHODS : Twenty morse taper conventional abutments (4.8 mm diameter) and smaller abutments (3.8 mm diameter) were tightened (20 Ncm) to their respective implants (3.5 × 11 mm) and after a 10 minute interval, implant/abutment assemblies were subjected to static compressive test, performed in a universal test machine with 1 mm/min displacement, at 45° inclination. The maximum deformation force was determined. Data were statistically analyzed by student t test.
RESULTS : Maximum deformation force of 4.8 mm and 3.8 mm abutments was approximately 95.33 kgf and 95.25 kgf, respectively, but no fractures were noted after mechanical test. Statistical analysis demonstrated that the evaluated abutments were statistically similar (P=.230).
CONCLUSION : Abutment measuring 3.8 mm in diameter (reduced) presented mechanical properties similar to 4.8 mm (conventional) abutments, enabling its clinical use as indicated.
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KEYWORD
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Dental Implants, Dental Implant Abutment Design, Morse Taper Dental Implant Abutment Connection, Compressive Strength
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