cover screw
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2021 ◽  
Author(s):  
Yin Wuwei ◽  
Yang Yong ◽  
Wu Zhenzhen ◽  
Chen Pei ◽  
Yang Zinan ◽  
...  

Abstract Background: This study aimed to evaluate the risk factors of cover screw loosening (CSL) and its influence on peri-implant marginal bone during early bone healing process.Methods: A total of 91 implants in 90 patients (75 normal patients and 15 patients with CSL) were included in this study. Panoramic radiographs were taken for the measurement of peri-implant marginal bone loss (MBL). A piece of soft tissue above the cover screw during the second-stage surgery was taken for pathological examination. The differences between the two groups were evaluated and the possible risk factors associated with CSL were analyzed.Results: Increased frequency of CSL showed significant association with maxillary region (p=0.038). The mean MBL at implants with CSL was 0.82 ± 0.56 mm, and it was 0.22 ± 0.20 mm at normal implants (p<0.001). The inflammatory granulation tissue around the loose cover screws showed infiltration of a large number of inflammatory cells.Conclusions: CSL during healing process is associated with early peri-implant MBL. The location of the maxilla is considered as a significant risk factor for CSL.


2019 ◽  
Vol 30 (S19) ◽  
pp. 436-436
Author(s):  
Algirdas Puisys ◽  
Viktorija Auzbikaviciute ◽  
Egle Vindasiute-Narbute ◽  
Dainius Razukevicius ◽  
Rokas Linkevicius ◽  
...  

2018 ◽  
Vol 8 (2) ◽  
pp. 66
Author(s):  
VeronikaAgnes Jancsik ◽  
Peter Óvári ◽  
Jozsef Piffkó

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
İbrahim Duran ◽  
Betül Yılmaz ◽  
Mahmut Sümer ◽  
Berre Karöz ◽  
Çağrı Ural
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