<h2 style="text-align:justify">Prophy Head Spattering Paste? Troubleshooting the KaVo L53 by Job</h2>

&nbsp;

Because the KaVo L53 does both endo and polishing work, the same symptom can have different causes depending on the job. Note what the head was doing when the problem appeared, then use the matching section below.

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<h2 style="text-align:justify">During Polishing: More Paste Spatter</h2>

&nbsp;

<ul>
	<li>
	Check the speed. KaVo lists a maximum of 3,000 rpm.
	</li>
	<li>
	Watch a short run outside the mouth to confirm the head is reciprocating. KaVo designed the 60&deg; motion to prevent paste scatter.
	</li>
	<li>
	Confirm the attachment has a 2.35 mm shaft and is fully seated.
	</li>
</ul>

&nbsp;

<h2 style="text-align:justify">Is It the Right Head?</h2>

&nbsp;

KaVo&#39;s INTRA prophy head L31 is designed for snap-on and screw-type polishing attachments, with multiple seals against paste and a 7,500 rpm maximum. The L53 instead takes 2.35 mm shafts in a push-button chuck. If your attachment is snap-on or screw-type, use the L31.

&nbsp;

<h2 style="text-align:justify">During Endo: Instrument Slips</h2>

&nbsp;

<ol>
	<li>
	Confirm a 2.35 mm shaft.
	</li>
	<li>
	Reseat it fully, or try a new instrument.
	</li>
	<li>
	Check the speed and try another shank.
	</li>
</ol>

&nbsp;

If a correct instrument still slips, the chuck is worn. Stop using the head.

&nbsp;

<h2 style="text-align:justify">Shared Faults</h2>

&nbsp;

<ul>
	<li>
	Stiff push button: paste or debris inside. Clean and lubricate correctly.
	</li>
	<li>
	Loose on the shank: clean the connection and make sure the quick-action collar closes fully.
	</li>
	<li>
	Clicking or warmth: stop using the head immediately.
	</li>
</ul>

&nbsp;

<h2 style="text-align:justify">Quick Check Table</h2>

<h2 style="text-align:justify">&nbsp;</h2>

<h2 style="text-align:justify">L53 checks by job</h2>

&nbsp;

<table align="center" cellspacing="0" style="border-collapse:collapse; width:900px">
	<thead>
		<tr>
			<td style="background-color:#111111; border-bottom:1px solid #8c8c8c; border-left:1px solid #8c8c8c; border-right:1px solid #8c8c8c; border-top:1px solid #8c8c8c; vertical-align:top; width:260px">
			Job
			</td>
			<td style="background-color:#111111; border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:1px solid #8c8c8c; vertical-align:top; width:260px">
			Symptom
			</td>
			<td style="background-color:#111111; border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:1px solid #8c8c8c; vertical-align:top; width:260px">
			First check
			</td>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td style="border-bottom:1px solid #8c8c8c; border-left:1px solid #8c8c8c; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Polishing
			</td>
			<td style="border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Spatter
			</td>
			<td style="border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Speed and reciprocation
			</td>
		</tr>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid #8c8c8c; border-left:1px solid #8c8c8c; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Polishing
			</td>
			<td style="background-color:#f2f2f2; border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Attachment will not fit
			</td>
			<td style="background-color:#f2f2f2; border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Shaft type (2.35 mm) or use the L31
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid #8c8c8c; border-left:1px solid #8c8c8c; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Endo
			</td>
			<td style="border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Instrument slips
			</td>
			<td style="border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			2.35 mm shaft, fully seated
			</td>
		</tr>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid #8c8c8c; border-left:1px solid #8c8c8c; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Either
			</td>
			<td style="background-color:#f2f2f2; border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Stiff button
			</td>
			<td style="background-color:#f2f2f2; border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Correct care cycle
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid #8c8c8c; border-left:1px solid #8c8c8c; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Either
			</td>
			<td style="border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Warmth or clicking
			</td>
			<td style="border-bottom:1px solid #8c8c8c; border-left:none; border-right:1px solid #8c8c8c; border-top:none; vertical-align:top; width:260px">
			Stop use, inspection
			</td>
		</tr>
	</tbody>
</table>

<h2 style="text-align:justify">After Sterilization</h2>

&nbsp;

If the L53 feels stiff straight after the autoclave, check that paste was rinsed off and that the head was lubricated before sterilization, not after.

&nbsp;

<h2 style="text-align:justify">Problems on Only One Shank</h2>

&nbsp;

If the L53 misbehaves on one shank but not another, the shank is the likely cause. KaVo INTRA heads fit MASTERmatic and older LN/LH/CN/CH shanks, which makes this comparison easy.

&nbsp;

<h2 style="text-align:justify">Myths vs Facts About Prophy Heads</h2>

&nbsp;

<ul>
	<li>
	Myth: any polishing attachment fits any prophy head. Fact: the L53 takes 2.35 mm shafts. KaVo&#39;s L31 is designed for snap-on and screw-type attachments.
	</li>
	<li>
	Myth: faster polishing is better. Fact: KaVo lists a 3,000 rpm maximum for the L53.
	</li>
</ul>

&nbsp;

<h2 style="text-align:justify">Describing the Problem for Service</h2>

&nbsp;

Note whether the problem appears during endo, polishing, or both, the attachment type in use, and the speed setting. That points the technician to the right area.

&nbsp;

Related Readings from RepairGuru :

&nbsp;

<ul>
	<li><a href="https://repair.dental/repairguru/lab-scanner/how-to-maintain-your-3shape-e3-lab-scanner">How to Maintain Your 3Shape E3 Lab Scanner</a></li>
	<li><a href="https://repair.dental/repairguru/lab-scanner/when-to-service-your-3shape-d2000-scanner">When to Service Your 3Shape D2000 Scanner</a></li>
	<li><a href="https://repair.dental/repairguru/lab-scanner/when-to-service-your-3shape-d2000-scanner">When to Service Your 3Shape D2000 Scanner</a></li>
</ul>

&nbsp;

<h2 style="text-align:justify">Frequently Asked Questions</h2>

&nbsp;

Why is my L53 scattering paste?

Check the speed and that the head is reciprocating. KaVo designed the 60&deg; motion to prevent scatter.

&nbsp;

What is the maximum speed?

KaVo lists 3,000 rpm for the L53.

&nbsp;

<a href="https://repair.dental/print-shipping-label/handpiece-repair">Start Your Repair</a>

&nbsp;

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Prophy head spattering paste or slipping attachments? Troubleshoot the KaVo L53 by job, check speed and shaft size

Prophy Head Spattering Paste? KaVo L53 Fix | Repair.Dental