Skip to content

Effect of Starpen Injection Device Versus Conventional Syringe During Anesthesia and Extraction of Primary Molars

Evaluation of the Effect of Computer Controlled Starpen Automatic Injection Device Versus Conventional Syringe on Pain Perception During Infiltration Anesthesia and Extraction of Maxillary Primary Molars : A Randomized Clinical Trial

Status
Not yet recruiting
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07156032
Enrollment
38
Registered
2025-09-04
Start date
2026-01-31
Completion date
2026-10-31
Last updated
2025-09-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pain Perception of the New Device

Keywords

Starpen device, Computer controlled automatic injection device, Computer controlled injection, pain perception, infiltration anesthesia, extraction of maxillary primary molars

Brief summary

To evaluate the effect of Starpen device on pain perception during anesthesia and extraction of maxillary primary molars.

Detailed description

After enrollment of the patients according to the eligibility criteria, taking full medical , dental history and informed consents from the parents. Clinical and radiographic examination will be done for the tooth to be extracted. A diagnostic chart with personal, medical and dental history will be filled out . Also preoperative psychological management of the child through positive reinforcement techniques should be done . Then the two parallel groups will have local anesthesia using an infiltration technique in the upper jaw ; one group with conventional syringe and the other group by Starpen automatic injection device . Both groups will have the site of injection well prepared before injection by the same way and technique. In Addition, procedures as anesthesia injection and extraction will be done according to the guidelines set by the American Academy of Pediatric Dentistry . After the procedure is done , the participants and their parents will be instructed about post-operative care and the need of a space maintainer will be taken into account. Moreover subjective and objective pain will be assessed and scored during procedure of anesthesia injection and extraction.

Interventions

DEVICEStarpen automatic injection device

Starpen device will be used on high speed 45-150s with the conventional carpule of articaine HCL 4% with 1:100,000 epinephrine and short needle

injection will be done using conventional metal syringe with articaine HCL 4% with 1:100,000 epinephrine and short needle

Sponsors

Cairo University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
6 Years to 8 Years
Healthy volunteers
No

Inclusion criteria

* Children aged 6-8 years * Cooperative children ( rating 3 or 4 based on the Frankl behavior scale ) * Medically fit children (ASA I ) * Children mentally capable of communication * First dental visit * Patient requiring extraction of upper primary molars due to root caries , crown fractures, periapical disease and failed pulpotomies * No acute dental pain

Exclusion criteria

* Children with a behavioral management problem * Parental refusal of participation * Children with previous history of local anesthesia injection * Medically unfit children (other than ASA I ) * Uncooperative children ( other than Frankl 3,4) * Children under medications ( antibiotics and analgesics ) for the previous 48 hours that could alter the pain perception * Teeth that showed any signs of mobility , ankylosis or root resorption affecting more than one third the root * Acute dental pain

Design outcomes

Primary

MeasureTime frameDescription
Subjective pain during injectionduring procedureSubjective pain perception during injection of infiltration anesthesia using Wong Baker Scale which represents a series of faces from 0-value happy face that represents lack of pain to a 10-value crying face which represents the worst possible face . On this basis , the patient chooses the face that best describes his/her level of pain.

Secondary

MeasureTime frameDescription
Objective pain during infiltrationduring procedureObjective pain perception during infiltration anesthesia using Faces, legs, Arms, Crying, Consolability (FLACC) scale . The scale is scored in a range of 0-10 with 0 representing no pain. The observation lasts for 2-5 minutes. Each parameter is evaluated on a scale from 0 to 2; the total score is interpreted as follows: 0 = relaxed and comfortable, 1-3=mild, 4-6=moderate pain, 7-10=severe discomfort/ pain.
Subjective pain during extractionduring procedureSubjective pain perception during extraction of maxillary primary molars using Wong Baker Scale which represents a series of faces from 0-value happy face that represents lack of pain to a 10-value crying face which represents the worst possible face . On this basis , the patient chooses the face that best describes his/her level of pain.
Objective pain during extractionduring procedureObjective pain perception during extraction of maxillary primary molars using Faces, legs, Arms, Crying, Consolability (FLACC) scale . The scale is scored in a range of 0-10 with 0 representing no pain. The observation lasts for 2-5 minutes. Each parameter is evaluated on a scale from 0 to 2; the total score is interpreted as follows: 0 = relaxed and comfortable, 1-3=mild, 4-6=moderate pain, 7-10=severe discomfort/ pain.
Physiological parameters ( heart rate )Readings will be taken before and during anesthesia injection and during extraction.Physiological parameters ( heart rate) at three time points : baseline , during injection and during extraction using pulse oximeter on the child's index finger. At which 70-100 bpm is the normal range at rest and higher heart rate readings reflects anxiety/pain/ discomfort .
Physiological parameter ( oxygen saturation)Readings will be taken before and during anesthesia injection and during extraction.Physiological parameter ( oxygen saturation) at three time points : baseline , during injection and during extraction using pulse oximeter on the child's index finger. At which 95-100% is the normal range on room air . A drop below 94% indicates hypoxemia and immediate assessment must be for airway and breathing.

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026