The Performance of Autoclaved High-Speed Dental Handpieces

Wirthlin, M. R.; Shklair, I.L.; Northerner, R.A.; Shelton, Samuel W.; Bailey, Gordon L.

doi:10.14219/jada.archive.1981.0304

Cited by 11 publications

(7 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…40 A previous in vitro study by the present authors 41 recommended the use of a disinfectant solution to eliminate residual bacteria after cavity preparation, despite the ability of acid-etching to reduce bacteria along the cavity walls. The use of antibacterial agents such as xylitol, triclosan, and CHX in conjunction with fluoride agents and intensive oral-hygiene instructions was also suggested as a means of reducing the risk of decalcification and subsequent caries development.…”

Section: Discussionmentioning

confidence: 82%

Does chlorhexidine affect the shear bond strengths of orthodontic brackets?

Çatalbaş

Ercan

Dallı

et al. 2011

Journal of Dental Sciences

View full text Add to dashboard Cite

Background/purpose: The purpose of this study was to examine the effect of 1% chlorhexidine (CHX) gel on the shear bond strength (SBS) of orthodontic brackets bonded with Transbond XT (XT, 3M Unitek) and Transbond Plus Self-Etching Primer (TSEP, 3M Unitek). Materials and methods: In total, 75 extracted premolars were collected and randomly divided into five groups of 15 teeth each. Brackets were bonded to teeth using a different experimental technique for each group as follows: (I) (control): etch/dry/Transbond XT; (II) CHX gel/etch/dry/Transbond XT; (III) etch/dry/CHX gel/Transbond XT; (IV) dry/TSEP; and (V) CHX gel/dry/TSEP. All products were used according to the manufacturers' instructions. An Instron Universal Testing Machine was used to directly apply an occlusal shear force onto the enamel-bracket interface at a speed of 0.5 mm/min. Residual adhesive on each tooth was evaluated using an adhesive remnant index (ARI). Analysis of variance was used to compare the SBS of the groups, and a Chi-squared test was used to compare ARI scores. Results: Group I had the highest mean SBS (16.47 AE 4.2 MPa), followed by Groups II (16.24 AE 4.5 MPa), III (13.08 AE 4.50 MPa), IV (11.95 AE 2.7 MPa) and V (11.16 AE 2.8 MPa). No statistical differences were observed between Groups I and II (P > 0.05) or between groups IV and V (P > 0.05). However, SBS scores for Groups IV and V were significantly lower than those of Groups I and II (P > 0.05). No significant difference was observed in ARI scores among any of the groups (P > 0.05). Prior application of CHX gel did not significantly affect the SBS of orthodontic bonding adhesives.

show abstract

Section: Discussionmentioning

confidence: 82%

Does chlorhexidine affect the shear bond strengths of orthodontic brackets?

Çatalbaş

Ercan

Dallı

et al. 2011

Journal of Dental Sciences

View full text Add to dashboard Cite

show abstract

“…The larger spots appeared to follow circumferential wear 6 Group Lubrication Loading Corrosion protection Autoclaved…”

Section: Corrosionmentioning

confidence: 99%

“…Although dental ball bearings now have an excellent reputation for high speed and smooth operation, meeting or exceeding the standard ISO P4 2 or more, 3 considerable controversy has developed over the effect of clinical use on bearing failure. [4][5][6][7][8][9][10] There are three main points to consider. Firstly, although the metallic parts (including balls and rings) are now made of so-called stainless steel, if subjected to repeated autoclaving sterilization between patients, which is mandated in many countries, the balls and raceway may corrode.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Failure analysis of the ball bearings of dental air turbine handpieces

2013

View full text Add to dashboard Cite

Background: The aim of this study was to identify the nature and causes of deterioration and failure in dental handpiece ball bearings and thus provide guidance for clinical handling for service longevity. Methods: The bearings of 36 turbine assemblies were dismantled for visual inspection, documented using a digital camera, and examined using scanning electron microscopy, as appropriate. Results: For the metal parts of the ball bearing assembly, defects observed were mainly wear arising from the running load and corrosion. This was in the form of scratches and discoloured circumferential bands on the balls, and dull or worn surfaces extending around the circumference of the raceways. Cage damage including cracking, fracture, surface rubbing and distortion occurred, in varying degrees, in every failed turbine. Conclusions: Dental ball bearing failure modes have been identified. Cumulative effects of damage from corrosion and mechanical factors lead to handpiece deterioration. The cage was found to be very vulnerable to damage, and this may be the key limitation on bearing lifetime. Autoclaving may contribute to that, as it does to corrosion in the absence of adequate lubrication, but this seems to be minor in comparison to the effects of abuse. There is no justification for failing to observe usage and sterilization instructions.

show abstract

“…The manufacturer claims these handpieces have some specific valves to inhibit the air and water lines contamination through the two above-mentioned mechanisms. 7 …”

Section: Introductionmentioning

confidence: 99%