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Soleimani M, Żmudzki J, Pakieła W, Jaśkowska A, Krasny K. Dental Implant Abutment Screw Loss: Presentation of 10 Cases. J Funct Biomater 2024; 15:96. [PMID: 38667553 PMCID: PMC11050945 DOI: 10.3390/jfb15040096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 04/28/2024] Open
Abstract
Re-tightening the loosened dental implant abutment screw is an accepted procedure, however the evidence that such screw will hold sufficiently is weak. The purpose of this study was material analysis of lost dental implant abutment screws made of the TiAlV alloy from various manufacturers, which became lost due to unscrewing or damaged when checking if unscrewed; undamaged screws could be safely re-tightened. Among 13 failed screws retrieved from 10 cases, 10 screws were removed due to untightening and 3 were broken but without mechanical damage at the threads. Advanced corrosion was found on nine screws after 2 years of working time on all surfaces, also not mechanically loaded. Sediments observed especially in the thread area did not affect the corrosion process because of no pit densification around sediments. Pitting corrosion visible in all long-used screws raises the question of whether the screws should be replaced after a certain period during service, even if they are well-tightened. This requires further research on the influence of the degree of corrosion on the loss of the load-bearing ability of the screw.
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Affiliation(s)
- Maryam Soleimani
- Department of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, 18a Konarskiego Str., 41-100 Gliwice, Poland; (M.S.); (W.P.)
- Doctoral School, Silesian University of Technology, 2A Akademicka Str., 44-100 Gliwice, Poland
| | - Jarosław Żmudzki
- Department of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, 18a Konarskiego Str., 41-100 Gliwice, Poland; (M.S.); (W.P.)
| | - Wojciech Pakieła
- Department of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, 18a Konarskiego Str., 41-100 Gliwice, Poland; (M.S.); (W.P.)
| | - Anna Jaśkowska
- Anident Dental Clinic, 12 Belgradzka Str., 02-793 Warszawa, Poland (K.K.)
| | - Kornel Krasny
- Anident Dental Clinic, 12 Belgradzka Str., 02-793 Warszawa, Poland (K.K.)
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Adawi HA, Dewan H, Khawaji A, Akkam H, Hakami A, Wasli B, Hakami M, Alali M, Chohan H. Effects of Blood Contamination and Decontamination Protocol on Reverse Torque Value of Abutment Screws in Dental Implants: An In Vitro Study. Biomimetics (Basel) 2023; 8:157. [PMID: 37092409 PMCID: PMC10123743 DOI: 10.3390/biomimetics8020157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/05/2023] [Accepted: 04/12/2023] [Indexed: 04/25/2023] Open
Abstract
Background and Objective: Loosening of abutment screws in dental implants is a mechanical complication that affects prosthetic treatments and hence, patient satisfaction. Blood contamination of abutment screws may play a role in this phenomenon. However, only limited research attention has been given to this issue. In the present study, we determined the effect of blood contamination and decontamination protocol on the reverse torque value (RTV) of abutment screws. Materials and Methods: A questionnaire-based survey was sent to 210 implantologists requesting feedback on their attitude to the blood contamination issue and the decontamination protocols used. The survey responses were used in a selection of the decontamination solutions that were used in the subsequent in vitro study on the effects of blood decontamination protocol on the RTV of abutment screws. Thus, three study groups were used (n = 20 abutment screws in each group): Group 1 (control group; blood-contaminated screws); Group 2 (screws decontaminated with 5.25% sodium hypochlorite (NaOCl) solution); and Group 3 (screws decontaminated with normal saline solution (0.9%)). Then, each of the connections were subjected to thermocycling, and RTVs of the screw were measured using a digital torque meter. Intragroup and intergroup RTVs were analyzed for significance using analysis of variance (ANOVA) and Tukey's honestly significant difference (HSD) tests. Results: 48% of the implantologists responded to the survey; 80% of them were concerned with blood contamination in the implant connection, especially before abutment loading and 85% of them used either chlorhexidine solution or normal saline solution as the decontamination agent. The mean RTV for Group 2 screws (30.27 ± 2.8 N.cm) was significantly greater than that for Group 3 screws (26.02 ± 1.99 N.cm) which, in turn, was significantly greater than that for Group 1 screws (23.64 ± 1.84 N.cm). Conclusion: Decontamination of blood-covered connections using 5.25% NaOCl solution or normal saline solution restores the RTV of abutment screws. This finding may have clinical relevance in that the decontaminated screws may contribute to the low incidence of screw loosening and, ultimately, improved patient satisfaction.
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Affiliation(s)
- Hafiz A. Adawi
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Harisha Dewan
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Arwa Khawaji
- General Dentist, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Hadeel Akkam
- General Dentist, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Areej Hakami
- General Dentist, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Bashair Wasli
- Dental Intern, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Maram Hakami
- Dental Intern, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Maimonah Alali
- Dental Intern, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Hitesh Chohan
- Department of Restorative Dental Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
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