<h2>KaVo INTRA Head L68 / L68 B Problems &amp; Fixes: The Two-Minute Head Swap Test</h2>

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Most contra-angle problems leave you guessing. With a KaVo INTRA system, you have a powerful shortcut: swap the head and see what happens.

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This guide shows how to use that test with the L68 and L68 B, and what each result means

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Quick answer: If a problem disappears when you fit a different INTRA head to the same shank, the original head is the cause. If it stays, look at the shank, motor or coupling instead.

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<h2 style="text-align:justify">How Does the Head Swap Test Work?</h2>

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<ol>
	<li>
	Note the symptom with the original L68 or L68 B fitted.
	</li>
	<li>
	Remove it using the quick-action safety retention collar.
	</li>
	<li>
	Fit a known-good 1:1 head on the same shank.
	</li>
	<li>
	Repeat the same test
	</li>
</ol>

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<h2 style="text-align:justify">What Do the Results Tell You?</h2>

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<table align="center" cellspacing="0" style="border-collapse:collapse; width:900px">
	<thead>
		<tr>
			<td style="background-color:black; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:217px">
			Symptom
			</td>
			<td style="background-color:black; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:275px">
			Gone After Swap
			</td>
			<td style="background-color:black; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:288px">
			Still There After Swap
			</td>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:217px">
			Bur or file slips
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:275px">
			Original head chuck
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:288px">
			Unlikely; recheck the bur
			</td>
		</tr>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:217px">
			Roughness or noise
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:275px">
			Original head
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:288px">
			Shank or motor
			</td>
		</tr>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:217px">
			Heat
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:275px">
			Original head
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:288px">
			Shank, motor or cooling
			</td>
		</tr>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:217px">
			Light dim
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:275px">
			Rarely head-related
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:288px">
			Shank light path or motor
			</td>
		</tr>
	</tbody>
</table>

&nbsp;

<h2 style="text-align:justify">Why Would a Bur Slip in an L68?</h2>

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KaVo lists the L68 with push-button tensioning and a reinforced chuck system for contra-angle burs. Check the bur is correct and fully seated. Debris around the debris deflector disc can also interfere.

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<h2 style="text-align:justify">Why Would a File Slip in an L68 B?</h2>

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KaVo lists the L68 B for contra-angle burs and root canal instruments with a 2.35 mm shaft, held by a ball-bearing mounted push-button chuck. Check the shaft size and seat it fully.

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Swap test pointed at the head? Hand it to Repair.Dental for a proper bench check.

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<h2 style="text-align:justify">Scenario (illustrative): An L68 B feels slightly rough during NiTi preparation. After a head swap, the shank runs perfectly. The practice keeps working with the spare head and sends the original in, without losing the appointment.</h2>

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<h2 style="text-align:justify">When Should You Stop Using the Head?</h2>

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<ul>
	<li>
	A bur or file that will not stay secure
	</li>
	<li>
	Heat at the head
	</li>
	<li>
	Roughness that remains after correct lubrication
	</li>
</ul>

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<h2 style="text-align:justify">Could It Be the Speed Setting?</h2>

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KaVo lists the L68 at a maximum of 40,000 rpm and the L68 B at 100 to 40,000 rpm. If the speed seems wrong, check the motor and unit settings, especially if using an ESTETICA unit&#39;s endodontics function as KaVo describes.

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<h2 style="text-align:justify">What If the Head Will Not Come Off the Shank?</h2>

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KaVo designed the quick-action safety retention collar for simple, fast head changes. If removal suddenly becomes difficult, do not force it or use tools. Residue or damage at the connection may be the cause, and forcing it can harm both the head and the shank. Send both parts together for evaluation.

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<h2 style="text-align:justify">Could the Problem Be the Wrong Head for the Job</h2>

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KaVo offers 14 INTRA heads for different indications. If a 1:1 L68 or L68 B is being used for a task where a reduction head such as the L66 B or L67 would suit better, the result can feel like a fault. Check that the head matches the procedure before assuming something is broken.

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

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How do I know whether the head or shank is faulty?

Swap in a known-good head on the same shank. If the problem goes away, it is the head.

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Is the L68 B a latch head?

KaVo&#39;s US site lists it as the &quot;INTRA latch head L68 B.&quot;

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<h2 style="text-align:justify">Related Readings from RepairGuru :</h2>

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<ul>
	<li style="text-align: justify;"><a href="https://repair.dental/repairguru/lab-scanner/straumann-cares-scanner-software-updates">Straumann CARES Scanner Software Updates</a></li>
	<li style="text-align: justify;"><a href="https://repair.dental/repairguru/lab-scanner/analyzing-why-fast-lab-scanner-repair-matters-for-dental-labs">Analyzing Why Fast Lab Scanner Repair Matters for Dental Labs</a></li>
	<li style="text-align: justify;"><a href="https://repair.dental/repairguru/lab-scanner/recognizing-early-failure-symptoms-in-high-precision-lab-scanners">Recognizing Early Failure Symptoms in High-Precision Lab Scanners</a></li>
</ul>

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KaVo INTRA L68 or L68 B bur slipping, rough, hot or not releasing? Find out if it is the head or the shank with these simple checks.

KaVo INTRA Head L68 / L68 B Problems & Fixes | Repair.Dental