Evaluation of the Effects of Diameter, Length, Splinted or Nonsplinted Form, and Crown-to-Implant Ratio on the Stress Distribution Around Extra-Short Implants in the Posterior Mandible: Finite Element Analysis.
Purpose: To investigate the distribution of stress in the bone around extra-short posterior mandibular implants to replace two molar teeth in six different treatment plans. Materials and Methods: In this experimental study, preexisting CBCT data sets were imported into image-processing software (Mim...
| Publicado en: | International Journal of Oral & Maxillofacial Implants Vol. 41; no. 2; pp. 276 - 287 |
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| Autores principales: | , , , |
| Formato: | diagnostic images pictorial research tables/charts Journal Article |
| Publicado: |
Quintessence Publishing Company Inc.
2026
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=192781634&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 192781634 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 08822786 GR1 jtl: International Journal of Oral & Maxillofacial Implants issn: 08822786 maglogo: N pubinfo: dt: 2026 vid: 41 iid: 2 pid: 1935 pub: Quintessence Publishing Company Inc. place: Batavia, Illinois artinfo: ui: 192781634 192781634 192781634 10.11607/jomi.11298 192781634 ppf: 276 ppct: 11 formats: tig: atl: Evaluation of the Effects of Diameter, Length, Splinted or Nonsplinted Form, and Crown-to-Implant Ratio on the Stress Distribution Around Extra-Short Implants in the Posterior Mandible: Finite Element Analysis. aug: au: Salehivaziri, Hossein Yousefimanesh, Hojatollah Hagh, Leila Golpasand Jahangirnezhad, Mahmoud affil: Department of Periodontics, School of Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran sug: subj: Finite Element Analysis Mandible Surgery Crowns Dental Implants Dental Prosthesis, Implant-Supported Dental Prosthesis Design Tomography, X-Ray Computed Methods Dentistry Human Iran Experimental Studies Data Analysis Software Imaging, Three-Dimensional Mandible Physiology Molar Physiology Stress, Mechanical Cancellous Bone ab: Purpose: To investigate the distribution of stress in the bone around extra-short posterior mandibular implants to replace two molar teeth in six different treatment plans. Materials and Methods: In this experimental study, preexisting CBCT data sets were imported into image-processing software (Mimics and 3-matic, Materialise) to create accurate 3D mandibular contours using finite element analysis (FEA). A total of 18 models for the reconstruction of the mandibular first and second molars were created based on the implant diameter, crown height, and splinted or nonsplinted form, with a 100-N load applied at a 30-degree angle. Two extra-short implants with a length of 4 mm and a diameter of 4.1 mm and/or 4.8 mm were used; the crown heights were 15 mm, 12.5 mm, and 10 mm, depending on the model. Results: The study of stresses in cortical bone, trabecular bone, implants, and crowns revealed that the highest stress levels (ie, 118.27 MPa in cortical bone) were associated with the treatment plan involving two implants with a diameter of 4.1 mm without a splint and a crown height of 15 mm. Conversely, the lowest amount of stress (ie, 29.12 MPa in cortical bone) was observed in the treatment plan with two implants with a diameter of 4.8 mm without a splint and a crown height of 10 mm. Crown height influenced stress the most (= 237.6% increase), followed by diameter (= 63.7% reduction, weakened at higher crowns), while the type of splinting effects varied (ie, +122.7% crown stress increase in specific cases); cortical bone stayed below a 130 MPa safe zone, but trabecular bone often exceeded 10 MPa. Conclusions: Increasing the height of the crown in nonsplinted implants leads to an increase in stress distribution in all cases of the treatment plan outlined in this study, with statistical analysis suggesting trabecular bone risk and a need for fatigue studies. pubtype: Academic Journal doctype: diagnostic images pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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