Does the Modification of the Apical Geometry of a Dental Implant Affect Its Primary Stability? A Comparative Ex Vivo Study
(1) Background: Primary stability—one fundamental criterion for the success of dental implants—is influenced by implant geometry even if the effect of apical shape modifications on implant primary stability has not yet been examined. Therefore, the aim of the ex vivo study was to compare primary sta...
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doaj-ab517e29c5c44bf88bce5088beed2b7b2021-04-01T23:04:33ZengMDPI AGMaterials1996-19442021-04-01141728172810.3390/ma14071728Does the Modification of the Apical Geometry of a Dental Implant Affect Its Primary Stability? A Comparative Ex Vivo StudyHenning Staedt0Diana Heimes1Karl M. Lehmann2Peter Ottl3Monika Bjelopavlovic4Wilfried Wagner5Bilal Al-Nawas6Peer W. Kämmerer7Private Practice, Blumenstraße 43, 73728 Esslingen am Neckar, GermanyDepartment of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, GermanyDepartment of Prosthetic Dentistry, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, GermanyDepartment of Prosthodontics and Materials Science, University Medical Center Rostock, Strempelstraße 13, 18057 Rostock, GermanyDepartment of Prosthetic Dentistry, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, GermanyDepartment of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, GermanyDepartment of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, GermanyDepartment of Oral- and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany(1) Background: Primary stability—one fundamental criterion for the success of dental implants—is influenced by implant geometry even if the effect of apical shape modifications on implant primary stability has not yet been examined. Therefore, the aim of the ex vivo study was to compare primary stability of implants differing in apically located screw threads (J-line) or a flat tip (K-line) only. (2) Methods: 28 implants of each group of the same diameter (4.3 mm) were randomly inserted into porcine bone blocks. The first group (9, 11 and 13 mm) was inserted into “hard”, the second (11 mm) into “soft” bone, here using a normal and an undersized drilling protocol. Insertion torque (Ncm), Periotest<sup>®</sup> value, resonance frequency (implant stability coefficient, ISQ) and push-out force (N) were measured. (3) Results: In “hard” bone, primary stability increased with increasing length in both groups but it was significantly higher in J-line (<i>p</i> < 0.03). An undersized preparation of the implant bed in “soft” bone resulted in a significant increase in primary stability in both groups. Here, J-line also showed a significantly increased primary stability when compared to equally prepared K-line (insertion torque: 37 Ncm vs. 26 Ncm; Periotest<sup>®</sup>: −6.5 vs. −4.3; push-out force: 365 N vs. 329 N; <i>p</i> < 0.05 each). (4) Conclusions: Primary stability is significantly higher with increasing implant length and apically located screw threads as well as with undersized drilling protocols. When preparing the implant site and subsequently selecting the implant system, modifying factors such as implant geometry (also at the tip) should be taken into account.https://www.mdpi.com/1996-1944/14/7/1728dental implant primary stabilitycamlog screw-line promote<sup>®</sup> plusapical screw threadbone densityJ-lineK-line |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Henning Staedt Diana Heimes Karl M. Lehmann Peter Ottl Monika Bjelopavlovic Wilfried Wagner Bilal Al-Nawas Peer W. Kämmerer |
spellingShingle |
Henning Staedt Diana Heimes Karl M. Lehmann Peter Ottl Monika Bjelopavlovic Wilfried Wagner Bilal Al-Nawas Peer W. Kämmerer Does the Modification of the Apical Geometry of a Dental Implant Affect Its Primary Stability? A Comparative Ex Vivo Study Materials dental implant primary stability camlog screw-line promote<sup>®</sup> plus apical screw thread bone density J-line K-line |
author_facet |
Henning Staedt Diana Heimes Karl M. Lehmann Peter Ottl Monika Bjelopavlovic Wilfried Wagner Bilal Al-Nawas Peer W. Kämmerer |
author_sort |
Henning Staedt |
title |
Does the Modification of the Apical Geometry of a Dental Implant Affect Its Primary Stability? A Comparative Ex Vivo Study |
title_short |
Does the Modification of the Apical Geometry of a Dental Implant Affect Its Primary Stability? A Comparative Ex Vivo Study |
title_full |
Does the Modification of the Apical Geometry of a Dental Implant Affect Its Primary Stability? A Comparative Ex Vivo Study |
title_fullStr |
Does the Modification of the Apical Geometry of a Dental Implant Affect Its Primary Stability? A Comparative Ex Vivo Study |
title_full_unstemmed |
Does the Modification of the Apical Geometry of a Dental Implant Affect Its Primary Stability? A Comparative Ex Vivo Study |
title_sort |
does the modification of the apical geometry of a dental implant affect its primary stability? a comparative ex vivo study |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2021-04-01 |
description |
(1) Background: Primary stability—one fundamental criterion for the success of dental implants—is influenced by implant geometry even if the effect of apical shape modifications on implant primary stability has not yet been examined. Therefore, the aim of the ex vivo study was to compare primary stability of implants differing in apically located screw threads (J-line) or a flat tip (K-line) only. (2) Methods: 28 implants of each group of the same diameter (4.3 mm) were randomly inserted into porcine bone blocks. The first group (9, 11 and 13 mm) was inserted into “hard”, the second (11 mm) into “soft” bone, here using a normal and an undersized drilling protocol. Insertion torque (Ncm), Periotest<sup>®</sup> value, resonance frequency (implant stability coefficient, ISQ) and push-out force (N) were measured. (3) Results: In “hard” bone, primary stability increased with increasing length in both groups but it was significantly higher in J-line (<i>p</i> < 0.03). An undersized preparation of the implant bed in “soft” bone resulted in a significant increase in primary stability in both groups. Here, J-line also showed a significantly increased primary stability when compared to equally prepared K-line (insertion torque: 37 Ncm vs. 26 Ncm; Periotest<sup>®</sup>: −6.5 vs. −4.3; push-out force: 365 N vs. 329 N; <i>p</i> < 0.05 each). (4) Conclusions: Primary stability is significantly higher with increasing implant length and apically located screw threads as well as with undersized drilling protocols. When preparing the implant site and subsequently selecting the implant system, modifying factors such as implant geometry (also at the tip) should be taken into account. |
topic |
dental implant primary stability camlog screw-line promote<sup>®</sup> plus apical screw thread bone density J-line K-line |
url |
https://www.mdpi.com/1996-1944/14/7/1728 |
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