Needle tip deformation after PDL and Intraseptal dental local anesthesia

8/12/2019 Needle tip deformation after PDL and Intraseptal dental local anesthesia

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Official Publication of Orofacial Chronicle , India

www.jhnps.weebly.com

ORIGINAL RESEARCH

Needle tip deformation after PDL and Intraseptal dental

local anesthesia

A.V.Kuzin, PhD1 Yu.V.Ereskina

2A.A. Kurtyshov

2

1-I.M. Sechenov First Moscow State Medical University, department of oral

surgery. 2- I.M. Sechenov First Moscow State Medical University, student of

Dentistry Faculty.

ABSTRACT:

The comparative analysis of dental needle tip deformation after periodontal

anesthesia for the increasing it safety was carried out.

Methods:47 needles with "a standard bevel" and "surgical bevel" were selected

after PDL and intraseptal anesthesia in 24 patients. In a view under microscope

deformation of needles tips were observed.

Results:In all cases of periodontal anesthesia the deformation of the tips looked

like a bends under various angle. Bends from 15 to 180 to needle axis are noted.

These deformations arise at single use of a needle. After anesthesia of multiroot

teeth where from two to four injections were carried out, needle tip deformations

were also revealed.

Conclusion:Therefore for one periodontal injection - one needle is necessary, and

in cases of multi-root teeth 2 - 4 needles are needed. The smallest deformation was

observed in needles "surgical edge" type that is associated with a smaller length of

a bevel and its two-edged sharpening.


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Keywords: local anesthesia, PDL anesthesia, intraseptal anesthesia, needle tip

deformation, needle bevel.

Cite this Article: A.V.Kuzin, Yu.V. Ereskina A, A. Kurtyshov: Needle tip deformation after PDL

and Intraseptal dental local anesthesia, Journal of Head & Neck physicians and surgeons Vol 2

Issue 1 2014 : Pg 48-52

INTRODUCTION:

Intraseptal and PDL anesthesia techniques require from 1 to 4 injections to get

anesthesia for 1 tooth. Until now the question of needle tip deformation after

periodontal local anesthesia is unknown. Needle tip deformation with bevel like

surgical edge was not investigated.The comparative analysis of dental needle tip

deformation after periodontal anesthesia to increase its safety.

OBJECTIVES:

1. Study of needle tip deformation with regular bevel and surgical edgeafter periodontal anesthesia.

2.Needle tip deformation after single-rooted tooth and multirooted toothanesthesia.

MATERIAL AND METHODS:

There was performed treatment of 24 patients having indications for tooth

extraction with periodontal local anesthesia: PDL and Intraseptal anesthesia.

After local anesthesia 47 needles with different bevel type were selected to

study the degree of their tip deformation under the microscope. Needles were

arranged in groups depending on kind of anesthesia, company manufactured

needles and single or multiple using. There were used the following needles type:

with regular bevel (fig.1) Uniject 27G, Nipro 30G and with bevel like

surgical edge Septoject Evolution 27G (fig.2). Neddle tip deformation was

examined by means of optical microscope LOMO under 4/0*10 magnification

with object-plate illumination under different angle. Every needle photographed in

front and lateral projections (Sony Alpha DSLR-A230). Every needle was fixed on

the clean plate by an epoxy adhesive. After the research needles were plunged


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down to the sharps container to collect sharp tools, utilization was in compliance

with sanitary rules.

Fig.1: Needle tip with regular bevel. Control group. Photo. Microscope magnification X 40.

Fig.2: Needle tip with bevel like surgical edge. Control group. Photo. Microscope magnification

40.

RESULTS:

In our research there were revealed the following needle tip deformation

types: upright bend (turned to the bevel), reverse bend. In some cases the tip

deformation was so evident and a tip was so reversed from the place of injection

(form-of-U bend). After PDL anesthesia the needles with regular bevel

(Uniject) have shown upright bend in 11,1%, reverse bend 0%, form-of-U

bend 77,8% (fig.3), absence of deformation was not noted. High percentage of

form-of-U bend relates to technique of PDL anesthesia. Long tip of this bevel

undergo a strong mechanical resistance due to tooth tissue and alveolar bone.


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After PDL anesthesia the needles surgical edge have demonstrated upright

bend in 30%. Reverse bend 20%, form-of-U bend 40%, absence of

deformation in 10%. Lower percentage of form-of-U bendexposes a large

wearing qualities of this needle type. Bevel like surgical edge is shorter than

regular bevel and less undergo a deformation. After intraseptal anesthesianeedles (Nipro) with regular bevel had upright bend in 28,6% (fig.4), reverse

bend 28,6%, form-of-U bend 42,9%, absence of deformation was not

revealed. Regular bevel of needles (Uniject) have shown form-of-U bend in

91,7% (fig.5), upright bend, reverse bend and absence of deformation were not

found out.

Fig.4: Needle deformed tip as upright bend after intraseptal anesthesia of 32 tooth.

Regular bevel. Photo. Microscope magnification 40.

Fig.5: Needle deformed tip as form-of-U bend after intraseptal anesthesia of 36 tooth.

Regular bevel. Photo. Microscope magnification 40.


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After intraseptal anesthesia bevel like surgical edge have shown following

results: upright bend11,1%, reverse bend11,1%, form-of-U bend 66,7%,

absence of deformation11,1%.

CONCLUSION:During PDL anesthesia surgical edge needles have less tip deformation (form-of-

U bend40%) than needles with regular bevel (form-of-U bend 77,8%).

When performing intraseptal anestesia a deformation degree does not differ

between themselves (p0.01) (surgical edge 66,7%, regular bevel 67,3%).

There were no differences in needles tip deformation between anesthesia in single-

rooted tooth and multirooted tooth.

REFERENCES:

1.Rout P.G.J., Saksena A., Fisher S.E. An Investigation of the Effect on 27-gauge Needle Tipsfollowing a Single Local Anaesthetic Injection Dental UpdateSeptember 2003

2.Stacy G.C., Hajjar G. Barbed needle and inexplicable paraesthesias and trismus after dental

regional anaesthesia. Oral Surg Oral Med Oral Pathol 1994: 77: 585599.

3.Steele A.C., German M.J., Haas J., Lambert G., Meechan J.G. An in vitro investigation of the

effect of bevel design on the penetration and withdrawal forces of dental

needles.Journalofdentistry, 41 2013:164169.

Acknowledgement-None

Source of Funding-Nil

Conflict of Interest-None Declared

Ethical Approval-Not Required

Correspondence Addresses :

Dr A.V.Kuzin PHD

143900 Moscow region,

Balaschikha, Lenin str. 15/7 - 27.

Email id- polev_gor @mail.ru

___________________________________________________________________________
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Needle tip deformation after PDL and Intraseptal dental local anesthesia