Abstract
There are a number of prosthetic terminal devices which offer functional restoration to individuals with upper limb deficiencies. Hosmer and Ottobock are major commercial hook providers for prosthetic terminal devices. The concern of this paper is to analyse the voluntary opening (VO) Ottobock model 10A18 and Hosmer model 99P hooks (one band) during opening operation and to find out favourable features in the design. Two tests were conducted to analyse the performance of both hooks. The first test used a simple bench tool to investigate cable excursion and hook opening angle and the second test used force sensor to find out the force supplied at a different hook opening angle. The study found that the average cable excursion for both hooks is approximately 30% less than the hook’s opening span with the force at the hook’s tip section being inversely proportional to the force at the lateral section. Ottobock 10A18 has a better control for grasping larger objects, while Hosmer 99P has the highest average force at the tip section but yet less efficient in generating adequate force for activities of daily living. Favourable features identified are low cable excursion per hook opening span and balance lateral to hook tip pinch force.
Research funding: This study was supported by the Malaysia UM Postgraduate Research Grant (project number: PG143-2016A).
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References
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- Relationship between linear velocity and tangential push force while turning to change the direction of the manual wheelchair
- Analysis of voluntary opening Ottobock Hook and Hosmer Hook for upper limb prosthetics: a preliminary study
Articles in the same Issue
- Frontmatter
- Efficiency test of current carotid embolic protection devices
- Influence of sizes of abutments and fixation screws on dental implant system: a non-linear finite element analysis
- Biomechanical evaluation of novel ultrasound-activated bioresorbable pins for the treatment of osteochondral fractures compared to established methods
- Fabrication of multifunctional CaP-TC composite coatings and the corrosion protection they provide for magnesium alloys
- An experimental study of shear-dependent human platelet adhesion and underlying protein-binding mechanisms in a cylindrical Couette system
- The influence of implant body and thread design of mini dental implants on the loading of surrounding bone: a finite element analysis
- RapidNAM: generative manufacturing approach of nasoalveolar molding devices for presurgical cleft lip and palate treatment
- Enamel shear bond strength of different primers combined with an orthodontic adhesive paste
- Biomechanical analysis of stiffness and fracture displacement after using PMMA-augmented sacroiliac screw fixation for sacrum fractures
- Regular research articles
- An investigation of the effects of suture patterns on mechanical strength of intestinal anastomosis: an experimental study
- Relationship between linear velocity and tangential push force while turning to change the direction of the manual wheelchair
- Analysis of voluntary opening Ottobock Hook and Hosmer Hook for upper limb prosthetics: a preliminary study