Apex locators - Correct method to measure working length !!

This is description of method of use of electronic apex locators and their accuracy during Root Canal Treatment.

[@sayantankarmakar3150]

Eye opening explanations especially about the multiple constrictions. Thank you

[@Endocrisps]

Thankyou🙏🙏

[@dramitsupekar6727]

Very informative sir Hats off to ur patience! 1.How about stopping at the end of blue zone or 1 mark? 2.After how many days of access opening one can obturate ...in different types of cases 3.Can we go for crown prep immediately after obturation (what i usually do)?

[@vijyantmehrotra8119]

Very nicely explained dear 👏

[@dr.abbasali3841]

Literally sir....you opened my eyes for the W/L determination ....i was making mistakes daily while taking working length and was always violating apical constriction and was doing over-instrumentation...Tysm sir 🙏

[@Endocrisps]

🙏🙏

[@dr.abbasali3841]

@@Endocrisps one more thing sir ....is there any new literature which tells to prepare till Apex ( for e.g. If Apex locator reading is 00 at 20mm then is it compulsory to prepare till 20mm to completely remove pulp tissues ? )

[@dr.abbasali3841]

I completely understood.your point ..There is no confusion.... I'm just asking is there any changes in new studies recently ?

[@nmda9578]

Thank you. Very helpful.

[@Endocrisps]

🙏🙏

[@psainibds]

Hi, Dr Sukhwant, your lectures are always precise and very informative for clinicians in day to day practice. Thanks for your YT channel. Looking forward to do endo course under you, whenever situation allows after this COVID 19.

[@Endocrisps]

Thankyou brother🙏🙏 Always there

[@drmdzia6221]

@@Endocrisps sir gd evening sir in some canal j mortia not showing working length in some cases what we b the reason fr that ....shll I should change the battery 🔋 of it

[@Endocrisps]

Slightly moist the canal. Error reading can happen in dry canals

[@kf-ot6vw]

Can't thank u enough.... I ve asked this question to many endodontists and even they cudnt answer why they do what they do.. Thanks a lot I finally got an answer.... 👌

[@Endocrisps]

I am happy to know that it is helpful🙏🙏

[@sacredholymonk]

beautiful lecture.

[@Endocrisps]

🙏🙏

[@256anu]

Thanks for informative video

[@Endocrisps]

🙏🙏

[@karishmakohli4566]

very informative video sir

[@Endocrisps]

🙏🙏

[@rajesh-kn4mb]

Sir super and clear video ......

[@Endocrisps]

🙏🙏

[@unstoppable2242]

Im so happy to find you😍😍😍😍👐💐🎉 I hate endodonty so I hope after you I will love Endodonty🌸🌸🌸

[@Endocrisps]

👍👍

[@amareshdora2600]

Much needed

[@Endocrisps]

🙏🙏

[@drshabbirthedentist293]

Got your point sir... I m doing rcts since 2010 but have a bad obsession of going beyond apex coz of fear of ledging and blocking... So my rcts are successful mostly.. But after obturation... Pt complains of pain for about 2 weeks. That's why was thinking of buying a new inbuilt zx II or braseller endosync AI.

[@Endocrisps]

Injury to periapical area is the cause of post op pain I guess 👍

[@drshabbirthedentist293]

@@Endocrisps right sir 👍

[@rajesh-kn4mb]

Sometime while calculating working length ....file doesn't reach apex smoothly...upon giving apical pressure apex locator shows reading or its fluctuating a lot ....in such cases how to go about???? please share

[@yamironnie]

Thanks you so much doc! 1. Does the 0.0 reading mean CDJ? 2. Where should the WL be? 0.0 or 0.5?

[@Endocrisps]

CDJ you can't determine with Apex locator WL at 0.5

[@vijyantmehrotra8119]

I'm 52 year old Dental Surgeon

[@bharatrathi2310]

Informative sir. Its like shaktimaan's " choti magar moti baatein". Good job sir.

[@Endocrisps]

Haha Thankyou🙏🙏

[@bharatrathi2310]

Sir, accordingly our obturation should terminate furthur 1 or 0.5 mm short than working length got by apex locator ?

[@Endocrisps]

@@bharatrathi2310 Obturation should be done till Working Length. Why short?

[@bharatrathi2310]

Ok sir. I confused it with radiographic apex

[@bharatrathi2310]

I have zx mini. Zx 2 and mini are equally accurate ?

[@Devakshi102]

Thanks sir. Very informative. 👍 How is woodpecker woodpex 3 gold apex locator??

[@Endocrisps]

🙏 No idea about woodpecker

[@drsanjeev1000]

Clear video sir. I have s denti i root apex locator. Its very accurate in presence of saline. I do only to 0.5 mm mark always. Confirmation file x ray and master cone x ray comes around 0.5 mm short of radiographic apex on that length

[@Endocrisps]

Thankyou !!

[@hamzahussain7794]

Thank you so much sir!!! I was having lots of trouble with working length measurement. Also which file do you use for measurement? No.10 or no.15 file?

[@Endocrisps]

🙏🙏 File should be snugly fit in canal, neither loose nor tight for WL measurement. Especially for molar's narrow canal #10 is suitable🙏🙏

[@hamzahussain7794]

@@Endocrisps Oh ok thanks alot! I will use 10 for posterior and 15 for anterior then!

[@hamzahussain7794]

@@Endocrisps Hello sir, I am currently working on a mandibular first molar, I have taken a radiograph with no 15 in each mesial canal and 20 in distal canal. The file is not going further and patient feels pain at this point Can you please check the lined radiograph and give your expert opinion? Link: imgur.com/gallery/eGK4dDy

[@hama4291]

Give anesthesia inside the canal and pain will go, I think there is another distal canal also,,, hand files usually don't reach apex even in distal canals sometimes times especially vital teeth,, so pre enlarge coronal 2 thirds with sx s1 and s2,, and use full strength naocl for that, then set your thinnest rotary file ( which is s1 protaper or the 3% taper files( like pathfinder,, or expeditors) to the estimated radiographic apex and go few stokes without pressure,, irrigate,, re do it and this time it will go further,, irrigate,,, re do it until length, then use the apex locater to see if you have achieved patency to zero reading, if you reach this moment then you have ended the difficult part! Now go back 0.5 to 1.0 mm to measure working length,, now use s2 then carry on to finisher files,, make sure you file is standing as straight as possible in relation to long access of the tooth after the 2/3 thirds enlargement,, if not then you probably haven't enlarged correctly,, probably didn't brush the files against the dentin triangle away from fur cation.....

[@vidhyasagarashok6704]

Useful

[@Endocrisps]

🙏🙏

[@drjeeveshmaxfacsurgery]

For an example , at apex length is 19mm we came at 0.5 marking so it would be 18.5 so final working length must be 18?

[@Endocrisps]

Focus on 0.5 mark in apex locator screen. Reach that part and then reduce 0.5 mm. This is best method. If you have gone till apex, come back 0.5 mark and measure the file length and the reduce 0.5 mm

[@pallavibhailume421]

Very informative video ...sir Means final working length, we have to keep 1mm short of apex ???

[@Endocrisps]

Yes 👍

[@drtayyabfaraz_10]

Can a root canal success if we are short 2 mm from apical constriction coronally ?

[@Endocrisps]

Not usually

[@rajesh-kn4mb]

Is the same principle holds good for woodpecker 5 model apexlocator.....as i tried the same concept as shared by u in video.... Please respond

[@Endocrisps]

I am not sure about woodpecker

[@bharatparwani7509]

Sir..is it necessary to remove all th pulp from the canal before using apex locator?

[@Endocrisps]

Hi No need in case of RootZX. Explained in video - principles of apex locator

[@runalichavan4395]

Sir which apex locator is best other than root zx for beginners.Root zx is quite expensive

[@Endocrisps]

Wait for some more months, go for the best. Apex locator is related to accuracy, so don't compromise. 👍

[@wickedchandy]

Very informative video sir, amazing. Sir how is NSK ipex ll apex locator?

[@Endocrisps]

It is good👍

[@mukhterahmad6894]

Very good nformation

[@Endocrisps]

Thankyou 🙏🙏

[@mukhterahmad6894]

@@Endocrisps sir metapex extrusion se koi problem to nhi hota?

[@Endocrisps]

Nhi 👍

[@dr.premsinghrathor4031]

Thanks

[@Endocrisps]

🙏🙏

[@drmdzia6221]

@@Endocrisps sir may god bless u with good health ....I have done many of root canal by j Morita....00 is the final working length in j mortia....In my clinic two consultant wll cme the wll stop the file when file stop at 00 in j Morita

[@AmritAssi]

So that means staying till the end of the blue zone yes ? And not extending the working length to green

[@Endocrisps]

Go till 0.5 mm mark and then reduce 0.5 mm

[@AmritAssi]

@@Endocrisps Ok sir, thank you

[@rajeevdave8451]

Sir woodpecer or epex which apex locater is good

[@Endocrisps]

I never used them. No idea. Take a demo correlate with xray and compare👍

[@angelicafoster670]

what does " apex word" or 0.0 point refer to ? radiographic apex or minor constricton?

[@Endocrisps]

Here apex means apical foramen🙏🙏

[@angelicafoster670]

@@Endocrisps Thanks

[@katyaynigupta5259]

then we should cut gp... or not...if we r taking wl at 1 reading of apex locator

[@Endocrisps]

No

[@chandrasekharsahoo6713]

Calcium hydroxide how many days we can keep in the canal as intracanal medicaments

[@Endocrisps]

3-7 days

[@adityasharma2k]

Hello doc ....plz suggest some economical apex locator, that have good accuracy.. Hows woodpeckers apex locator????

[@Endocrisps]

I never used woodpecker apex locator. No idea about its accuracy. If there is any little discrepancy in accuracy because of quality, it forfeits the purpose. So go for best. J Morita is best till date🙏

[@yashshaha2373]

Sir I have coxo Apex locator integrated can u pls tell how to read it's reading?

[@Endocrisps]

No idea about coxo

[@alpeshjain5171]

So to keep it simple how much short shld be keep it from apical constriction .is it 0.5mm short from apical constriction

[@Endocrisps]

Yes correct👌

[@alpeshjain5171]

So take away from ths video is 0.5 mark is apical constriction n our working length shld be 0.5 mm short from that mark (apical constriction )...

[@Endocrisps]

Yes👍

[@Hamed.dhmf7]

Dr why do you reduce 0.5 mm from file length in 0.5 point of apex locator? You mention it as a saftey factor I can accept it for irreversible pulpitis but in necrotic situation the whole length should be cleaned!

[@Hamed.dhmf7]

And according to the research that you mention it in 70% of cases number 0.5 was between AC and AF If this point is end of cleaning and shapin and obturation Why do we reduce .05mm?!!?!

[@Endocrisps]

Safety factor is guven because we can control our rotary files exactly on WL. It may slip beyond the WL. If you are concerned about last 0.5 mm then you can prepare that part with Hand 15-20 # k file.

[@mukeshadwani4695]

Means sir total 1 mm short of the first marked lenght???

[@Endocrisps]

Yes

[@deepanshunigam1019]

Hi sir again a very infomative video Plz advice if i should not invest in a cord or cordless endomotor And which of which brand

[@drmahanthashok3685]

Buy cordless. Easy to maintain and no wires

[@Endocrisps]

Yes cordless endomotor is easy to take care and convenient too. You can go with any brand come in your budget. Oricam, NSK, waldent are good brands and in economical range too. Call their dealers and test them first.

[@drmdzia6221]

Hi sir very good evening.....sir first time I am taking root zx mini wll it show accurate reading...plz hlp me sir

[@Endocrisps]

@@drmdzia6221 yes it will show accurate reading. Good tool👍

[@drmdzia6221]

@@Endocrisps ..sir after canal open we shld do minimal bmp ya direct we should put the file for taking wrking length....plz its request to u ...ya canal shld b dry

[@drmahanthashok3685]

Sir can you recommend some good Loupes in India.

[@Endocrisps]

1. Carl Zeiss 2. Zumax are good too. I tried Carl Zeiss 2-3 times but not used regularly. No personal experience.

[@hijamaworld9917]

Sir.. u lecture are awesome.. what are m1 ,m2----m6 programs in triauto zx mini endomotor with apex locator.. how to use it and what values we should set in each program.and where to use this programs

[@Endocrisps]

Thankyou for appreciating !!! I wl try to explain all the modes of tri auto root zx in one of the coming videos

[@vishugalhotra5175]

Best sealer????

[@Endocrisps]

Sealapex

[@21rup]

How we can reduce 0.5 mm in rotary file or hand file ... during final working length

[@Endocrisps]

Either by radiographs or apex locator once you decide that this is your length till apex in radiographs and 0.5 mm mark in apex locator. Suppose this is 20 mm, then final WL will be 0.5mm less that is 19.5mm.🙏🙏

[@Devakshi102]

@@Endocrisps if till apex is 20mm , then 19.5 will be between apical constriction n foramen . So will 19mm be final working length??

[@Endocrisps]

Correct👌👌

[@zeadiraqy9134]

If the reading was 00 that it mean I should substract 1 mm??

[@Endocrisps]

Focus on 0.5 mark only There is no relevance of other marks. Reduce 0.5 mm from this 0.5 mark length

[@zeadiraqy9134]

Dr. Is morita apex locator is previously seated when we buy it??

[@Endocrisps]

You have to assemble it. 👍

[@zeadiraqy9134]

In case of periapical lesion the apex locator give me lesser reading how can i fix that problem

[@bharatparwani7509]

Sir what is this 0.5 mm mark...is this preset by company or we have to set it? Please elaborate.

[@Endocrisps]

Yes its preset. You can only set the alarming sound. You can set that at apex, 0.5 or 1.

[@Endocrisps]

When file will reach near apical constriction, screen will show reading at 0.5 mark. You can't adjust this. Only thing you can change is the timing of beep sound.

[@bharatparwani7509]

Sir I have root zx mini...same things hold true for zx mini also?? One more thing...what readings will be shown on screen if we cross the apex?

[@Endocrisps]

Yes same for root ZX mini. Apex will flash on screen as soon as you go in apex (cross apical foramen)

[@bharatparwani7509]

@@Endocrisps thanks sir

[@rajatpradhan712]

What in case of ramifications?

[@Endocrisps]

Apex locator doesn't give reliable indication of ramifications

[@jagadeeshkodithyala2439]

What is the "00" marking on apex locator

[@Endocrisps]

Not significant in RootZX apex locator. 0.5 mm is the only significant finding which is close to apical constriction 🙏🙏

[@jagadeeshkodithyala2439]

@@Endocrisps in root zx mini "00" is the end point

[@Endocrisps]

According to company 00 doesn't signify anything🙏

[@tttttg3713]

how repair apex locator

[@AshokNanba]

Complaint?

[@suvayu009]

One question.Can Pulpal remenants give false result in apex locator?

[@Endocrisps]

Not in case of Root ZX third generation

[@mohdsakib5438]

Sir apex locator ka use hindi m samjhaiye

[@Endocrisps]

Ok sure 👍

[@wickedchandy]

Sir I have one question, I checked working length on apex locator on a lower molar, the file was 0.5 mm from the apex, I was happy and didn't took xray and obturated at that length but when I saw the final xray of obturation I was shocked to see the GP atleast 3 mm short in all canals of lower molars, sir what could have been the case for such discrepancy, and do I need to do re rct in this case immediately and re establish working length.

[@Endocrisps]

Purpose of Apex locator is to locate apical constriction the narrowest point in canal but for best results the file should be within 2-3 mm of apical third of root👍

[@wickedchandy]

@@Endocrisps Oh thank you so much sir, many thanks.