The biomechanical performances of short implant supporting fixed prosthesis by all-on-four treatment concept in maxilla : a finite element analysis

Name: Pornpon Sanpanyawai

keyword: All-on-four

; Short implant

; Finite element analysis

Abstract: Rehabilitation of maxillary edentulous patient with All-on-four by placing 2 tilted splint with 2 normal angulation implants, is one of an effective treatment solutions. However with this concept, operator’s experience are more required in procedure for placement of implant in tilted position. Recently, the success of short implant (less than 6 mm.) has been reported. Using short implant instead of tilted implant placement may be interested. One of the important success factors in implant treatment is the stability of marginal bone level that strongly relies on the biomechanical performances. Therefore, the purpose of this study is to evaluate the biomechanical performances of short implant for supporting fixed prosthesis in edentulous maxilla. For three finite element models of artificial edentulous maxillary arch including dental implant (4.1x8, 4.1x6, and 4.8x6 mm.) with zirconia prosthesis were designed into 3 different conditions. In anterior region, two 4.1x8 mm. implants were used in all conditions. In posterior region, a couple of short implant with diameter 4.1 mm. were used in condition 1 and a couple of 4.8 mm. in diameter were used in condition 2. While condition 3 (original All-on-four) 2 pieces of 4.1x8 mm. implant were placed with 30° tilted angulation. Both axial and oblique loading directions were applied 150 N. at first molar area bilaterally. Strain, stress, strain energy density (SED), and implant displacement in each condition were evaluated. Overall results revealed that the strain, stress, and displacement generated from each condition reveal were not greater than 4000 microstrains (bone’s maximum strain value before resorption), 104 MPa (bone’s yield strength), and 5 μm (physiologic movement of osseointegrated implant), respectively. However, all parameters in the conditions with short implant got less as compared to original all-on-four indicated that marginal bone would not be effected or resorbed due to the biomechanical complication in all conditions. In addition, the application of short implant could reduce risk of surgical complications with safer to the bone in biomechanical aspect

Thammasat University. Thammasat University Library

Address: BANGKOK

Email: preserv@tu.ac.th

Name: Samroeng Inglam

Role: advisor

Name: Ekachai Chaichanasiri

Role: co-advisor

Created: 2015

Modified: 2021-10-26

Issued: 2021-10-26

วิทยานิพนธ์/Thesis

application/pdf

DOI: 10.14457/TU.the.2015.1562

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Dental Implantology

Grantor: Thammasat University

©copyrights Thammasat University

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