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Open AccessArticle

Load-Bearing Capacity and Retention of Newly Developed Micro-Locking Implant Prosthetic System: An In Vitro Pilot Study

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Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea
2
Research and Development Institute, Cowellmedi Co., Ltd., Busan 46986, Korea
3
Research and Development Institute, Samwon Dental Medical Precise Co., Ltd., Yangsan 50603, Korea
*
Author to whom correspondence should be addressed.
Materials 2018, 11(4), 564; https://doi.org/10.3390/ma11040564
Received: 15 March 2018 / Revised: 4 April 2018 / Accepted: 4 April 2018 / Published: 6 April 2018
The aim of this study was to introduce the newly developed micro-locking implant prosthetic system and to evaluate the resulting its characteristics. To evaluate load-bearing capacity, 25 implants were divided into five groups: external-hexagon connection (EH), internal-octagon connection (IO), internal-hexagon connection (IH), one-body implant (OB), micro-locking implant system (ML). The maximum compressive load was measured using a universal testing machine (UTM) according to the ISO 14801. Retention was evaluated in two experiments: (1) a tensile test of the structure modifications of the components (attachment and implant) and (2) a tensile test after cyclic loading (total 5,000,000 cycles, 100 N, 2 Hz). The load-bearing capacity of the ML group was not significantly different from the other groups (p > 0.05). The number of balls in the attachment and the presence of a hexagonal receptacle did not show a significant correlation with retention (p > 0.05), but the shape of the retentive groove in the implant post had a statistically significant effect on retention (p < 0.05). On the other hand, the retention loss was observed during the initial 1,000,000 cycles, but an overall constant retention was maintained afterward. Various preclinical studies on this novel micro-locking implant prosthetic system should continue so that it can be applied in clinical practice. View Full-Text
Keywords: dental implant; prosthesis; micro-locking; load-bearing capacity; retention dental implant; prosthesis; micro-locking; load-bearing capacity; retention
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Choi, J.-W.; Choi, K.-H.; Chae, H.-J.; Chae, S.-K.; Bae, E.-B.; Lee, J.-J.; Lee, S.-H.; Jeong, C.-M.; Huh, J.-B. Load-Bearing Capacity and Retention of Newly Developed Micro-Locking Implant Prosthetic System: An In Vitro Pilot Study. Materials 2018, 11, 564.

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