Marginal and Internal Adaptation of Commercially Pure Titanium and Titanium- Aluminum-Vanadium Alloy Cast Restorations
Khalid A. Al Wazzan, Ahmad A. Al-Nazzawi
Citation Information :
Al Wazzan KA, Al-Nazzawi AA. Marginal and Internal Adaptation of Commercially Pure Titanium and Titanium- Aluminum-Vanadium Alloy Cast Restorations. J Contemp Dent Pract 2007; 8 (1):19-26.
The purpose of this in vitro study was to investigate the marginal accuracy and internal fit of complete cast crowns and three-unit fixed partial dentures (FPDs) cast with commercially pure titanium (CPTi) and Titanium-Aluminum-Vanadium alloy (Ti-6Al-4V).
Methods and Materials
CPTi and Ti-6Al-4V alloy were used to cast twelve single crowns and twelve three-unit FPDs. A traveling microscope was used to measure marginal gap and discrepancies in internal fit. Two and oneway analysis of variance (ANOVA) analyses were used to determine the effects of the marginal and internal fit discrepancies.
Results
The Ti-6Al-4V alloy demonstrated a significantly smaller marginal gap than CPTi (P<0.0001). The recorded marginal discrepancies for both metals were within a clinically accepted range (<100 ìm). The single crown fit discrepancy was significantly smaller than the three-unit FPD for both the CPTi and the Ti-6Al-4V alloy (P<0.0001). For the internal fit discrepancy, the occlusal surface showed the greatest gaps.
Conclusions
The Ti-6Al-4V alloy demonstrated a better fit than CPTi. Single crowns showed an improved fit when compared with the three-unit FPD. Mid-occlusal internal gap demonstrated greater values than the axial internal gap.
Clinical Implications
This in vitro study suggested marginal fit of complete crowns and three-unit FPDs cast by CPTi or Ti-6Al-4V alloy were within the range of what is clinically acceptable for longevity of restorations.
Citation
Al Wazzan KA, Al-Nazzawi AA. Marginal and Internal Adaptation of Commercially Pure Titanium and Titanium-Aluminum-Vanadium Alloy Cast Restorations. J Contemp Dent Pract 2007 January;(8)1:019-026.
Titanium for prosthetic application: a review of the literature. Quintessence Int 1996;27:401-8.
Clinical results with titanium crowns fabricated with machine duplication and spark erosion. Acta Odontol Scand 1989;47:279-286.
Properties of test metal ceramic titanium alloys. J Prosthet Dent 1992;68:462-7.
Titanium alloy cylinders in implant framework fabrication: A study of the cylinder-alloy interface. J Prosthet Dent 1993;69:391-7.
Fusing of Dental Ceramics to Titanium. J Dent Res 2001;80:848-54.
In vitro wear assessment of titanium alloy teeth. J Prosthodont 2002;11:263-9.
Comparative study of circumferential clasp retention force for titanium and cobalt-chromium removable partial dentures. J Prosthet Dent 2002;88:290-6.
Titanium and titanium alloys as dental materials. Int Dent J 1993;43:245-53.
Studies of Ti alloys for dental castings. Dent Mater 1989;5:45-50.
Effect of corrosion on the strength of soldered titanium and Ti-6Al-4V alloy. Dent Mater 1996;12:167-72.
Disparity in expert opinions on size of acceptable margin openings. Oper Dent 1982;7:97-101.
The estimation of cement film thickness by an in vivo technique. Br Dent J 1971;131:107-11.
The effects of bevel angulation on marginal integrity. J Am Dent Assoc 1981;103:882-5.
Marginal accuracy and geometry of cast titanium copings. J Prosth Dent 1992;67:435-40.
Marginal fit of pure titanium cast crown copings. J Dent Res 1989;68:269.
Clinical application of pure titanium crowns. Dent Mater J 1985;4:191-5.
Marginal Fit of Machine-Milled Titanium and Cast Titanium Single Crowns. Int J Prosthodont 1994;7:440-7.
Fit of titanium and a base metal alloy metal-ceramic crown. J Prosthet Dent 2000;83:314-8.
Fit of cast commercially pure titanium and Ti- 6Al-4V alloy crowns before and after marginal refinement by electrical discharge machining. J Prosthet Dent 2002;88:467-72.
Comparison of accuracy of multiunit one-piece castings. J Prosthet Dent 1985;54:770-6.
Accuracy of one-piece castings, preceramic and post ceramic soldering. J Prosthet Dent. 1986;55:312-17.
Non-cast titanium restorations in fixed prosthodontics. J Oral Rehabil 1992;19:281-7.
A comparison of the marginal and internal adaptation of titanium and gold-platinum-palladium metal ceramic crowns. Int J Prosthodont 1995;8:29-37.
Factors affecting the retention and fit of gold castings. J Prosthet Dent 1987;57:425-30.
Marginal adaptation of cast partial crowns made of pure titanium and a gold alloy under influence of a manual burnishing technique. J Oral Rehabil 2001;28:401-6.
