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Fulltext Pathological evaluation for sterilization of routinely used prosthodontic and endodontic instruments

Kumar KV, Kiran Kumar KS, Supreetha S, Raghu KN, Veerabhadrappa AC, Deepthi S

J Int Soc Prev Community Dent, 2015 May-Jun;5(3):232-6.
PMID: 26236684 DOI: 10.4103/2231-0762.159962

In daily practice of dentistry, we use same instruments on many patients. Before use, all instruments must be cleaned, disinfected, and sterilized to prevent any contamination. Pre-cleaning and sterilization of some devices can be difficult because of their small size and complex architecture. Dental burs and endodontic files are such instruments. Dental burs come in a variety of shapes and sizes, all with highly complex and detailed surface features.

Matched MeSH terms: Dental Instruments
A pilot study on the effects of direct contact of two different surgical burs on the cadaveric lingual nerve

Al-Amery SM, Ngeow WC, Nambiar P, Naidu M

Int J Oral Maxillofac Surg, 2018 Sep;47(9):1153-1160.
PMID: 29735199 DOI: 10.1016/j.ijom.2018.04.013

The lingual guttering technique for third molar surgery carries the risk of injury to the lingual nerve if the surgical bur comes into direct contact with it. This study investigated the extent of nerve injury caused by two different burs, a tungsten carbide bur and the Dentium implant bur; the latter is designed to be soft tissue friendly. This study also examined whether ultrasound and magnetic resonance imaging are able to detect any injury inflicted. This cadaveric research involved subjecting 12 lingual nerves to the drilling effect of two different burs at two different speeds. The amount of damage caused was measured using different imaging modalities to assess their ability to detect the injury inflicted. At high speed, the Dentium bur caused a deeper and wider laceration than the carbide bur. At low speed, the laceration depths and widths caused by the two burs did not differ significantly. Ultrasound scanning was able to detect the nerve laceration at damaged sites observed using optical coherence tomography. Thus, a carbide bur (at low speed) would be preferable for lingual bone guttering, as it causes less laceration to the lingual nerve. In the event of a suspected injury, ultrasound scanning would provide an objective evaluation of the amount of nerve damage in vivo.

Matched MeSH terms: Dental Instruments*
Fulltext Ferret: The Animal Of Choice In Dental Experiments

Alani, A.H., Abdul Aziz Abdul Razak

Ann Dent, 1996;3(1):-.
MyJurnal

The canine teeth of the mature ferret have closed apices. They are easily accessible for operating purposes and are sufficiently large, allowing conventional cavity preparation techniques to be prepared using ordinary dental instruments. Handling of the ferret is relatively easy since it becomes quite tame after a period of time. The body weight in male is greater and the teeth larger than those of the female. The cost of purchase and maintenance of the ferret is also inexpensive. For all these reasons, the ferret male is animal of choice in dental experiments.

Matched MeSH terms: Dental Instruments
Fulltext The effect of multiple sterilisation cycles on cutting efficiency of a diamond bur

Husniyati Roslan, Fatanah M. Suhaimi, Zawiah Musa, Nizuwan Azman, Nur Jihan Mohd Zukhi

Malaysian Journal of Medicine and Health Sciences, 2018;14(102):1-7.
MyJurnal

Sterilisation is an essential step in the reprocessing of reusable dental instruments including burs that have become contaminated, or potentially contaminated. Transmission of disease or infection may happen as an effect of improper sterilisation of the reused instruments. Dental burs are one of the essential tools in any conservative dental procedures, which undergo multiple sterilisation cycles before being discarded. However, repeated sterilisation process is associated with the reduction in cutting efficiency of a bur that is potentially due to corrosion. Thus, this study aims to compare the effect of two sterilisation methods on cutting efficiency of a diamond bur that is commonly used in dental procedures. Methods: 30 fissure diamond burs were randomly divided into three sterilisation groups: Group A (dry heat), B (steam under pressure) and C (control). Each bur was used to cut teeth for 45 seconds for ten cycles. Between cuts, the burs underwent sterilisation based on their sterilisation groups. Amount of cutting weight was measured after each cut. Results: This study shows that no significant difference (p>0.05) in the cutting efficiency of the burs following sterilisation of Groups A and B. However, there is a significant mean difference (p

Matched MeSH terms: Dental Instruments
A computational simulation study on the acoustic pressure generated by a dental endosonic file: effects of intensity, file shape and volume

Tiong TJ, Price GJ, Kanagasingam S

Ultrason Sonochem, 2014 Sep;21(5):1858-65.
PMID: 24735986 DOI: 10.1016/j.ultsonch.2014.03.024

One of the uses of ultrasound in dentistry is in the field of endodontics (i.e. root canal treatment) in order to enhance cleaning efficiency during the treatment. The acoustic pressures generated by the oscillation of files in narrow channels has been calculated using the COMSOL simulation package. Acoustic pressures in excess of the cavitation threshold can be generated and higher values were found in narrower channels. This parallels experimental observations of sonochemiluminescence. The effect of varying the channel width and length and the dimensions and shape of the file are reported. As well as explaining experimental observations, the work provides a basis for the further development and optimisation of the design of endosonic files.

Matched MeSH terms: Dental Instruments*
Fulltext The use of dental drill in removing entrapped finger by metal ring in emergency department

Shamsuddin SR, Hashim AA, Nazer B, Hashairi F, Shaik Farid AW, Abu Yazid MN

Med J Malaysia, 2012 Jun;67(3):349-50.
PMID: 23082436 MyJurnal

Ring removal is indicated in a number of clinical circumstances to manage or prevent tourniquet effect of the digit. A ring made from hardened metal may defy commonly known methods of removal. We reported a case of unusual difficulty in removing a ring of hardened metal composition using a dental drill. We believed the unusual circumstances of this case is likely to be repeated in some other clinical practice and this instrument is an appropriate option to consider in such cases.

Matched MeSH terms: Dental Instruments*
In vitro accuracy and reproducibility of automated and conventional periodontal probes

Samuel ED, Griffiths GS, Petrie A

J Clin Periodontol, 1997 May;24(5):340-5.
PMID: 9178114

The aim of this study was to investigate the accuracy and reproducibility of experienced and inexperienced examiners using 3 automated periodontal probes (Florida Pocket Probe, Florida Disk Probe, Peri Probe) in comparison with 3 conventional periodontal probes (Marquis, Williams and EN-15 probes). Test blocks of aluminium had 30 holes of diameter 1.10 mm and depths ranging from 2.75 to 10.0 mm. machined with a tolerance of +/- 0.01 mm. 8 experienced examiners and 8 inexperienced examiners were selected to perform duplicate measurements on the blocks over 6 visits using each of the 6 probes. 1 automated and 1 conventional probe were used at each examination. The % accuracy and reproducibility for each of the duplicate measurements was calculated and analysed using Friedman 2-way analysis of variance and the Wilcoxon matched pairs test. On average, all probes showed high reproducibility, with the Florida Disk Probe, the Florida Pocket Probe and the Williams probe ranked best and the other 3 probes were less reproducible. On average, all probes showed a high degree of accuracy, automated probes were ranked best and were significantly better than conventional probes. Experience had little effect on reproducibility, with only the Peri Probe showing significant differences at the 5% level between the groups. Experience appeared to be more important for accuracy, as experienced examiners were more accurate than inexperienced examiners, with significant differences at the 5% level for the EN-15, Florida Disk Probe and Peri Probe. However, inexperienced examiners were significantly more accurate using the Williams probe. This in vitro study has shown that automated probes offer increased accuracy over conventional probes and the Florida Pocket and disk probes compare well with conventional probes for reproducibility.

Matched MeSH terms: Dental Instruments*
Fulltext Perception of Dental House Officers regarding Endodontic File Separation during Endodontic Treatment

Maqbool M, Tirmazi SSM, Shakoor A, Akram Z, Nazir R, Chohan AN, et al.

Biomed Res Int, 2023;2023:1044541.
PMID: 36845639 DOI: 10.1155/2023/1044541

BACKGROUND: Despite of having improved endodontic file designs as well as the reinforced metal alloy file structure, intracanal endodontic file separation (EFS) is still a very problematic and worrisome dental incident, which usually occurs without any visible signs of permanent deformation. Further, there have been conflicting reports regarding the clinical significance of leaving separated files within root canals.
AIMS: The aim of this study was to look into the current perceptions and awareness about file separation during endodontic treatment among the dental house officers (DHOs).
MATERIALS AND METHODS: A novel validated questionnaire comprising of 15 close-ended questions was distributed anonymously via Google Forms through email to 1100 DHOs across Pakistan. The questionnaire consisted of two parts: the first component (Section I) collected demographic data and the second component (Section II) investigated the causes of EFS during root canal treatment. Following the completion of socioeconomic information, including age and gender, the DHOs were asked to answer a few questions about the various reasons for endodontic instrument fracture.
RESULTS: A total of 800 responses were recorded, with an effective rate of 72.8%. The majority of the DHOs (p value < 0.001) perceived that endodontic instrument fracture occurred in the posterior (61.5%) and apical third of the canal (50.5%) and in older permanent dentition (67.3%), possibly due to patient anxiety (62%). Better choice of instrument (61.15%), operators' experience (95.3%), knowledge (87.5%), and proper root canal cleaning (91.1%) are believed to be the vital steps in reducing endodontic file separation/fracture. Furthermore, majority of them (p value < 0.001) perceived that stainless steel was a superior alloy for filing instruments. Manual files tend to be more prone to fractures due to repeated use than rotary files.
CONCLUSION: This study demonstrated that young DHOs had adequate knowledge and awareness regarding the potential predisposing factors and handling techniques for EFS. This study thereby provides an evaluating tool to access the insights of the current perceptions and awareness of DHOs concerning EFS.

Matched MeSH terms: Dental Instruments