The Effect of the Length and Distribution of Implants for Fixed Prosthetic Reconstructions in the Atrophic Posterior Maxilla: A Finite Element Analysis

被引:15
作者
Cenkoglu, Brunilda Gashi [1 ]
Balcioglu, Nilufer Bolukbasi [2 ]
Ozdemir, Tayfun [2 ]
Mijiritsky, Eitan [3 ]
机构
[1] Albanian Univ, Fac Dent, Dept Oral & Maxillofacial Surg, Tirana 1001, Albania
[2] Istanbul Univ, Fac Dent, Dept Oral Implantol, TR-34093 Istanbul, Turkey
[3] Tel Aviv Univ, Sackler Fac Med, Tel Aviv Sourasky Med Ctr, Dept Otolaryngol Head & Neck & Maxillofacial Surg, IL-5219100 Ramat Aviv, Israel
关键词
dental implant; finite element analysis; atrophic maxillary sinus; prosthodontics; stress; overload; SHORT DENTAL IMPLANTS; STRESS-DISTRIBUTION; BONE STRESS; REHABILITATION; DIAMETER; NUMBER;
D O I
10.3390/ma12162556
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this study, different prosthetic designs that could be applied instead of advanced surgical techniques in atrophic maxilla were evaluated with finite element analysis. Atrophic posterior maxilla was modeled using computer tomography images and four models were prepared as follows: Model 1 (M1), two implants supporting a three-unit distal cantilever prosthesis; Model 2 (M2), two implants supporting a three-unit conventional fixed partial denture; Model 3 (M3), three implants supporting three connected crowns; and Model 4 (M4), two implants supporting two connected crowns. Implants 4 mm in width and 8 mm or 13 mm in length were used. A linear three-dimensional finite element programme was used for analysis. The maximum principle stress (tensile) and minimum principle stress (compressive) were used to display stress in cortical and cancellous bones. The von Mises criteria were used to evaluate the stress on the implants. M1 was found to be the most risky model. The short dental arch case (M4) revealed the lowest stresses among the models but is not recommended when one more implant can be placed because of the bending forces that could occur at the mesial implant. In M2 and M3, the distal implants were placed bicortically between the crestal and sinus cortical plates, causing a fall of the stresses because of the bicortical stability of these implants.
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页数:15
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