Size 10 k file

Manufactured by Mani

Sourced in Japan

The Size 10 K-file is a dental instrument used for root canal procedures. It is a flexible, metal file with a tapered, sharp end that is designed to remove and shape the innermost layer of the tooth's root canal.

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Lab products found in correlation

Endo z bur, by Dentsply (1 mentions) Round diamond bur, by Mani (1 mentions) Protaper next ptn, by Dentsply (1 mentions) Hand k files, by Mani (1 mentions) Size 15 k file, by Mani (1 mentions) Br 40, by Mani (1 mentions) Sterile paper points, by Dentsply (1 mentions) Protaper, by Dentsply (1 mentions) X smart, by Dentsply (1 mentions)

Close spelling variants of this product

K-file (20 citations)

8 protocols using size 10 k file

Curcumin Analgesic Effect in Root Canal Therapy

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Study design and setting: This 1:1 allocation ratio parallel randomized controlled trial design was approved by evidence-base and ethical committee, Faculty of Dentistry. Curcumin and placebo capsules had the same color and shape.
Thus after assignment to the groups both operator and patients were blinded to the capsule content, the data assessor was also blinded. The code details were not revealed until the end of the study.
Intervention: Eligible participant was given the envelope and was asked to take the contained capsule; either Curcumin capsules (400mg Curcumin" Curcumin, Shanghai, China" + 20 mg pepper) or a placebo capsule (starch 420 mg). One hour after medication, the tooth was anesthetized by Inferior Alveolar Nerve Block (IANB) using 1.8 ml of 4% Articaine
HCl with 1:100,000 epinephrine (Artinibsa (4% carpule.
inibsa, spain). Post-injection lip numbness was a subjective sign of IANB success. After isolation with rubber dam, access cavity preparation was performed and canal patency was confirmed with K-file size #10 (Mani, Mani Inc. Utsunomiya, Tochigi, Japan). Working length was determined using apex locator (1iPex II, NSK, Japan), and confirmed radiographically to be 1 mm short of the radiographic apex.
Root canals were prepared using M-Pro nickel titanium rotary instruments (M-Pro smart kit, Hunan, China) at a speed 450 rpm and torque 1.5Ncm (Endo motor, NSK, Japan).

Eid G.E.H.M. (2021). The Effect of Premedication with Curcumin on Post-Operative Pain in Single Visit Endodontic Treatment of Acute Pulpitis in Mandibular Molars: A Randomized Controlled Trial. Journal of Dentistry and Oral Epidemiology, 1(3), 1-8.

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Standardized Endodontic Instrumentation Protocol

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After the access cavity was prepared for all the samples, the tooth length was determined by introducing K-file size 10 (Mani. Inc., Tochigi, Japan) into the canal till the tip of the file became visible from the apex. The working length (WL) was calculated by subtracting 0.5 mm from the tooth length.
After length determination, K-file size 10, followed by K-file size 15, was used to ensure canal patency and to create a glide path. All the canals were instrumented by the same type of nickel-titanium rotary files, Pepsi Gold Rotary files (Fanta Dental Materials Co., Ltd, Shanghai, China), according to the manufacturer’s instructions so that all the canals had the same prepared final size 25/04 to WL. After each instrument, patency was checked, and the canals were irrigated using 3 mL of total concentration NaOCl with a plastic syringe and a 30-G side-vented needle (Endo-Eze Irrigator, Ultradent Products, South Jordan, UT, USA). As the final irrigation protocol, 2 mL of 17% ethylenediaminetetraacetic acid (EDTA) (Prevest DenPro Limited, Jammu, India) was used, followed by 2 mL of saline (sodium chloride), and then, 2 mL of NaOCl. Passive ultrasonic irrigation was used for 30 s with every irrigant. Finally, the canals were irrigated with 2 mL of saline solution and dried with paper points size 25/02.

Elzanaty T.K., Elashiry M.M, & Mahran A.H. (2024). Retreatability of NeoSEALER Flo obturated with warm vertical compaction versus single-cone technique using two different retreatment systems. Journal of Conservative Dentistry and Endodontics, 27(3), 286-292.

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Standardized Endodontic Canal Preparation

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Two subgroups (n = 14) were created from the three experimental groups and one control group (CG), with the names CAC and TAC [Figure 1].
TAC [Figure 2a] and CAC [Figure 2b] designs were prepared by first gaining access to the pulp chamber with a Round Diamond Bur (Mani Inc, Japan) and then to the teeth themselves with an Endo-Z Bur (Dentsply, USA). The patency length was determined by observing the file tip pass through the apex of the canal while using a size 10-K file (Mani Inc., Japan). The glide path was prepared manually using K-files of up to size #30K, and the working length was set to be 0.5 mm shorter than the patency length. As a means of simulating the periodontal ligament, the roots were covered in a condensation silicone impression substance (GC, India) that was embedded in acrylic resin (MAARC, India). To prevent the samples from drying out, distilled water was used to store them.

Kapadia K.H., Patni P.M., Jain P., Raghuvanshi S., Pandey S.H, & Singhal R.R. (2023). Assessment of minimally invasive file systems on resistance to fracture using traditional and contracted access cavity designs in the maxillary first and second molars. Journal of Conservative Dentistry : JCD, 26(4), 395-401.

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Comparative Evaluation of Canal Instrumentation

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The working length of the specimens was established using a size 10 K-file (Mani. Tochigi, Japan). Hand K-files (Mani) up to size 25, using 5.25% sodium hypochlorite (NaOCl) as the irrigant, were used for the achievement of the initial glidepath for all root canals. The specimens were then randomly divided into 3 groups based on the intended instrumentation protocol (n = 60): group 1: ProTaper NEXT (PTN, Dentsply Maillefer, Ballaigues, Switzerland), up to X4 size; group 2: WaveOne “large” file (WO, Dentsply Maillefer); group 3: Self-adjusting File, 2 mm diameter (SAF, ReDent, Raanana, Israel).
The instruments were used according to the manufacturers’ instructions, including irrigation protocols during instrumentation, as recommended by each of the manufacturers. During these procedures, 5.25% NaOCl was used as the irrigant. Irrigation during canal instrumentation in the ProTaper NEXT and WaveOne groups was performed using a syringe and a 31 G side-port needle (Ultradent, South Jordan, UT, USA). In the SAF group, irrigation was performed through the hollow file using a VATEA irrigation pump (ReDent), which is an integral part of the SAF system. The volume of irrigating solution and irrigation time during canal instrumentation were standardized to a total of 16 mL and 4 min, respectively, for all instrumentation methods.

Pawar A.M., Kfir A., Metzger Z., Bhardwaj A., Yohana Y., Wahjuningrun D.A., Luke A.M, & Pawar B.A. (2022). Can Type of Instrumentation and Activation of the Final Irrigant Improve the Obturation Quality in Oval Root Canals? A Push-Out Bond Strength Study. Biology, 11(1), 59.

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Evaluating Mandibular Molar Root Curvature

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Eighty mature human mandibular first and second molars with mesial root curvature within the range of 20°–40° were selected from an existing pool of extracted human teeth in the Biomaterial Research Center, Shiraz, Iran. Root curvatures were measured after pre-operative radiographs according to the methodology of Schneider [13 (link)]. Teeth were excluded if they had heavily calcified canals, canals with apical foramina larger than a size 15 hand file (i.e. less than a size 20 file) as assessed externally, or with preexisting fractures or cracks when examined under a light microscope at × 20 magnification (Dino-Lite Pro2 AD413TL; AnMo Electronics Corp, New Taipei City, Taiwan). The teeth were stored in 0.1% chloramine T solution at 4 °C throughout the study.
After access cavity preparation, a size 10 K-file (MANI, INC. Utsanomiya, Japan) was placed into the canal until it was visible at the apical foramen and 1 mm was subtracted to establish working length (WL). A glide path was then prepared to a size 15 K-file. Each canal was irrigated with 2 mL of a freshly prepared 1% NaOCl solution between each instrument and dried with paper points. The teeth were then randomly divided into the following four groups (n = 20).

Bagheri R., Abbaszadegan A., Nabavizadeh M.R., Ferooz M, & Parashos P. (2021). Mathematical validation of measurement of root fracture resistance: an in vitro study. BMC Oral Health, 21, 503.

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Disinfection and Working Length Determination

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Extracted teeth were disinfected using formalin 10% solution and stored in distilled water till the study was initiated [23 (link)]. Access preparation was completed using no. 6 round diamond bur (Mani Inc., Tochigi, Japan) using a high-speed air-rotor handpiece. Canal patency was checked using a size 10 K-file (Mani. Inc., Tochigi, Japan). The working length for each tooth was measured using a size 15 K-file (Mani. Inc., Tochigi, Japan) until the tip of the file was visible at the apical foramen. The rubber stopper was adjusted to the most stable point at the coronal region. The length was measured using a ruler and the working length determined was kept at 1 mm short of the apical foramen. All the teeth samples were numbered, and the working length was noted for each tooth sample for reference during the biomechanical preparation.

Suresh B., Jeevanandan G., Ravindran V., Mashyakhy M., Alessa N., Syed A.A., Panda S., Assiry A.A., Maganur P.C, & Vishwanathaiah S. (2023). Comparative Evaluation of Extrusion of Apical Debris in Primary Maxillary Anterior Teeth Using Two Different Rotary Systems and Hand Files: An In Vitro Study. Children, 10(5), 898.

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Root Canal Access Preparation

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After administering local anesthesia with lignocaine containing 1:80000 adrenaline (Lignox, Warren, Mumbai, India) the tooth was polished with pumice and isolated with rubber dam. Surfaces of the tooth, rubber dam, and clamp were cleaned with 30% hydrogen peroxide followed by swabbing with 5% iodine tincture as described by Moller.[22 (link)] An autoclaved high speed air turbine with a round diamond point (BR 40: Mani, Inc., Tochigi, Japan) was used to initiate root canal access opening. The operating area was again swabbed with 5% iodine tincture and then a low-speed engine without water coolant was used to gain final access. The cavity walls were modified using safe end cutting diamond point (EX 24: Mani, Inc., Tochigi, Japan). The root canal was accessed with size 10 K-file (Mani, Inc., Tochigi, Japan) and the contents were debrided from the canal walls by push pull motion. Sterile water was then deposited in the canal and agitated using size 10 K-file (Mani, Inc., Tochigi, Japan).

Podar R., Kulkarni G.P., Dadu S.S., Singh S, & Singh S.H. (2015). In vivo antimicrobial efficacy of 6% Morinda citrifolia, Azadirachta indica, and 3% sodium hypochlorite as root canal irrigants. European Journal of Dentistry, 9(4), 529-534.

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Endodontic Preparation and Storage Protocol

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180 extracted, human single rooted premolar teeth were selected. Cleaning of visible blood and gross debris was done using an ultrasonic scaler. The extracted teeth were handled according to OSHA (Occupational Safety and Health Administration) guidelines. 0.1% thymol solution was used for the storage of the samples until use.
A round bur with a high-speed handpiece was used to make an access cavity in each tooth specimen. Apical patency was attained using a size 10 K file ((Mani. Inc., Tochigi, Japan. A 15 K-file (Mani. Inc., Tochigi, Japan) was extended 1 mm beyond the apical foramen by visualizing its tip, following which 1 mm was removed from the predetermined working length. Shaping and cleaning was carried out using the Protaper (Dentsply, India) rotary instruments till F3 with endo motar(X -Smart, Dentsply, India). In between each instrumentation change, the canals were irrigated with 2mL of 3% NaOCl (Vishal Dentocare Pvt. Ltd., Ahmedabad India), followed by 2mL of 17% EDTA (DEOR Deo Smear-Off, India) as the final irrigant. The canals were subsequently rinsed with 5-mL of sterile saline using a 27-gauge needle. Following irrigation of teeth, sterile paper points (Dentsply, India) were used to dry the root canals.
The teeth were stored in an incubator at 37°C at 100% humidity. The teeth were stored for periods of 1 week, 1 month and 3months.

Amonkar A.D., Dhaded N.S., Doddwad P.K., Patil A.C., Hugar S.M., Bhandi S., Raj A.T., Patil S., Zanza A, & Testarelli L. (2021). Evaluation of the Effect of Long-term Use of Three Intracanal Medicaments on the Radicular Dentin Microhardness and Fracture Resistance: An in vitro study. Acta Stomatologica Croatica, 55(3), 291-301.

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