R_Bibb_Medical_Modelling_The_Application_of_Adv.pdf

274 Medical modelling
material properties, demonstrates how the process may be integrated into
digital prosthesis design and production techniques that are compatible
with conventional handcrafting techniques.
Limitations
This study was unable to quantify the accuracy and resolution of the
ThermoJet ® produced patterns, although ultimately the visual effect would
need to be measured subjectively by a qualifi ed and experienced prosthetist.
This study has shown that CAD and RP processes may be used to
generate fi ne texture detailing, but further research is required in order to
quantify the resolution and accuracy requirements of these processes. The
authors intend to apply profi lometry to assess the surface of the RP produced
patterns and compare these with the CAD models.
6.17.9 Conclusions
This research has identifi ed methods of capturing, creating and reproducing
three-dimensional, skin texture like relief using CAD and RP technologies.
Furthermore, it has highlighted how these techniques may be integrated
into digital prosthesis design and construction processes. Limitations of
current technologies have also been highlighted and the authors intend to
refi ne the techniques and evaluate their effectiveness in suitable patient
case studies.
6.17.10 References
1. Thomas K (1994), Maxillofacial Prosthetics, London, Quintessence Publishing,
ISBN: 1850970327.
2. Ansgar C, Cheng A C, Wee A G, Li J T K, Archibald D (2002), ‘A new prosthodontic
approach for craniofacial implant-retained maxillofacial prostheses’,
Journal of Prosthetic Dentistry, 88 (2), 224–8.
3. Wolfaardt J, Sugar A, Wilkes G (2003), ‘Advanced technology and the future
of facial prosthetics in head and neck reconstruction’, International Journal of
Oral and Maxillofacial Surgery, 32 (2), 121–3.
4. Coward T J, Watson R M, Wilkinson I C (1999), ‘Fabrication of a wax ear by
rapid-process modelling using Stereolithography’, International Journal of
Prosthodontics, 12 (1), 20–27.
5. Bibb R, Freeman P, Brown R, Sugar A, Evans P, Bocca A (2000), ‘An investigation
of three-dimensional scanning of human body surfaces and its use in the
design and manufacture of prostheses’, Proceedings of the Institute of Mechanical
Engineers Part H: The Journal of Engineering in Medicine, 214 (6), 589–94.
6. Cheah C M, Chua C K, Tan K H, Teo C K (2003), ‘Integration of laser surface
digitizing with CAD/CAM techniques for developing facial prostheses Part 1:
design and fabrication of prosthesis replicas’, International Journal of
Prosthodontics, 16 (4), 435–41.