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Factors Influencing the Discomfort of Intraoral Needle Penetration
J. G. MeechanPhD, FDSRCPS,
P. C. HowlettBDS, MFDS, and
B. D. SmithBDS, MFDS
Article Category: Research Article
Volume/Issue: Volume 52: Issue 3
Online Publication Date: Sep 01, 2005
DOI: 10.2344/0003-3006(2005)52[91:FITDOI]2.0.CO;2
Page Range: 91 – 94

. Injections in the palatal mucosa are uncomfortable, and injections in the anterior part of the hard palate are perceived to be more uncomfortable than those more posteriorly. The first part of this investigation was designed to test if the discomfort produced by needle penetration differed in different parts of the hard palate. A number of studies have shown that the gauge of dental needle is irrelevant in relation to injection discomfort. 4 5 Scanning electron microscope images of dental needles after use show that the point blunts even if bone has not been

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Figure 1.; The mean Visual Analogue Scale scores for the entire study population for buccal needle penetrations with new and used needles and anterior and posterior palatal needle insertions. The asterisk indicates significant differences between columns on either side of the asterisk.
J. G. Meechan,
P. C. Howlett, and
B. D. Smith
Figure 1.
Figure 1.

The mean Visual Analogue Scale scores for the entire study population for buccal needle penetrations with new and used needles and anterior and posterior palatal needle insertions. The asterisk indicates significant differences between columns on either side of the asterisk.


J. G. Meechan,
P. C. Howlett, and
B. D. Smith
Figure 2.
Figure 2.

The mean Visual Analogue Scale scores for women for buccal needle penetrations with new and used needles, first and second buccal penetrations, and anterior and posterior palatal needle insertions. The asterisk indicates significant differences between columns on either side of the asterisk.


Joanna Saenz McPhersonDDS, MS,
Sara A. DixonDDS, MS,
Richard TownsendDMD, MS, and
Kraig S. VandewalleDDS, MS
Article Category: Other
Volume/Issue: Volume 62: Issue 1
Online Publication Date: Jan 01, 2015
Page Range: 2 – 7

Since its inception, the field of dental medicine has had the challenge of trying to create a painless experience for the patient. The fear of pain attributed to anesthetic needle injection has been cited as an obstacle in providing appropriate dental care. 1 – 3 A variety of patient management techniques have been attempted to improve patient comfort during dental anesthetic administration, including but not limited to smaller gauge needle sizes, slow computer-regulated administration, distraction techniques, vibrating devices, and topical

Yuki Kojima,
Kazuma Asano,
Takeshi Murouchi, and
Kazuya Hirabayashi
Figure 5.
Figure 5.

Catheter Insertion Through the Needle.

Needle is held in place as the flexible indwelling catheter is advanced.


Yuki Kojima,
Kazuma Asano,
Takeshi Murouchi, and
Kazuya Hirabayashi
Figure 3.
Figure 3.

Positioning of Ultrasound Probe and Needle.

Ultrasound probe and needle used to perform percutaneous nerve block positioned on a skull model.


Yuki Kojima,
Kazuma Asano,
Takeshi Murouchi, and
Kazuya Hirabayashi
Figure 4.
Figure 4.

Ultrasound Imaging During Injection.

Ultrasound image illustrating the needle and spread of local anesthetic solution. Cor, coronoid; Con, condyle; M, masseter; N, needle; LA, local anesthesia.


Joseph L. Packer,
Barry Krall,
Ali Makki, and
Mahmoud Torabinejad
<bold>Figure 2.</bold>
Figure 2.

A 27-gauge needle with a rubber endodontic stopper measured at 3 mm.


Andrew L. Young,
Junad Khan,
Davis C. Thomas, and
Samuel Y. P. Quek
Figure 7
Figure 7

Image of needle insertion, toward the neck of the condyle.


Coleman ChristensenDDS, MS,
Stephen C. ArnasonDDS, MS,
Ross OatesDMD,
Michael CrabtreeDDS, MS,
John W. Kersey JrDDS, MS, and
Kraig S. VandewalleDDS, MS
Article Category: Research Article
Volume/Issue: Volume 67: Issue 4
Online Publication Date: Dec 31, 2020
Page Range: 200 – 206

-assisted injection equipment, and even various needleless injection devices have been developed or utilized to reduce pain or fear of dental injections or increase the efficacy of anesthesia. 1 – 6 The Numbee (BioDent, Simi Valley, CA) is a novel device that claims to be “the first and only device to provide atraumatic delivery of local anesthesia without a hypodermic needle.” According to the manufacturer, the Numbee is a small metal cannula ensconced with a silicone-like material that is to be used for intraligamentary injections without penetration of the periodontal