Evaluation of a novel osteosynthesis plate system for mandibular defects

SummaryThe so-called “mixing” of implants and instruments from different producers entertain certain risks.The use of standardized implant materials (e.g. stainless steel ISO 5832/1) from different producers is necessary but is not sufficient to justify the use of an osteosynthesis plate from one source and a bone screw from another.The design, dimensions, tolerances, manufacturing procedure, quality controls, and application technique of the instruments and implants also vary according to make. This can lead to damage, failure or fracture of the biomechanical system called “osteosynthesis” and hence the failure of the treatment undertaken. In the end, it is the patient who pays for these problems.Some examples also illustrate the potential problems for the staff and institutions involved.The use of a unique, consistent, well-tested, and approved set of implants and instruments is to be strongly recommended to avoid any additional risk.

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Derivation of Transfer Functions for a Fluid-Loaded, Multiple-Layer Thick Plate System

10.21236/ada384400 ◽

2000 ◽

Author(s):

Andrew J. Hull

Keyword(s):

Thick Plate ◽

Transfer Functions ◽

Multiple Layer ◽

Plate System

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Complications of Poly-l-Lactic Acid and Polyglycolic Acid (PLLA/PGA) Osteosynthesis Systems for Maxillofacial Surgery: A Retrospective Clinical Investigation

Polymers ◽

10.3390/polym13060889 ◽

2021 ◽

Vol 13 (6) ◽

pp. 889

Author(s):

Yuhei Matsuda ◽

Masaaki Karino ◽

Tatsuo Okui ◽

Takahiro Kanno

Keyword(s):

Postoperative Complications ◽

Clinical Investigation ◽

Maxillofacial Surgery ◽

Multivariate Logistic Regression Analysis ◽

Polyglycolic Acid ◽

Oral And Maxillofacial Surgery ◽

Low Incidence ◽

Adjusted Model ◽

Pyriform Aperture ◽

Plate System

Two second-generation PLLA/PGA bioresorbable osteosynthetic plate systems for oral and maxillofacial surgery are available in Japan. The two systems have different PLLA-PGA component ratios (RapidSorb®, 85:15; Lactosorb®, 82:18) and plate and screw shapes. We conducted a retrospective study to compare our clinical evaluation and examine the incidence of postoperative complications between the two plate systems. A retrospective survey was conducted in 148 patients (midfacial fracture/trauma (68.2%) and dentofacial deformity patients (31.8%); males (54.7%); median age, 37.5 years) treated using maxillofacial osteosynthetic plate systems. The complications included plate exposure (7.4%), infection, (2.7%), and plate breakage (0.7%). Multivariate logistic regression analysis showed a significant correlation between sex (female), plate system (Lactosorb®), number of plates, and pyriform aperture and periorbital sites of plate placement (p < 0.05). Additionally, the propensity score-adjusted model showed a significant correlation between Lactosorb® and postoperative complications (odds ratio 1.007 (95% confidence interval, 1.001–1.055), p < 0.01). However, the two plate systems showed a low incidence rate of complications, and the plate integration and survivability were similar using 2.0-mm or 1.5-mm resorbable plate regardless of the plate system. Our findings suggest that female sex and a greater number of plates are risk factors for postoperative complications, whereas pyriform aperture and periorbital plate placements reduce the risk.

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Review of the Upright Balance Assessment Based on the Force Plate

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18052696 ◽

2021 ◽

Vol 18 (5) ◽

pp. 2696

Author(s):

Baoliang Chen ◽

Peng Liu ◽

Feiyun Xiao ◽

Zhengshi Liu ◽

Yong Wang

Keyword(s):

Postural Balance ◽

Force Plate ◽

Assessment Method ◽

Balance Assessment ◽

Experimental Conditions ◽

Methodological Research ◽

Assessment Tests ◽

Wide Range ◽

Foot Posture ◽

Plate System

Quantitative assessment is crucial for the evaluation of human postural balance. The force plate system is the key quantitative balance assessment method. The purpose of this study is to review the important concepts in balance assessment and analyze the experimental conditions, parameter variables, and application scope based on force plate technology. As there is a wide range of balance assessment tests and a variety of commercial force plate systems to choose from, there is room for further improvement of the test details and evaluation variables of the balance assessment. The recommendations presented in this article are the foundation and key part of the postural balance assessment; these recommendations focus on the type of force plate, the subject’s foot posture, and the choice of assessment variables, which further enriches the content of posturography. In order to promote a more reasonable balance assessment method based on force plates, further methodological research and a stronger consensus are still needed.

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