Comparative assessment of efficacy of automated micromotor and endomotor in biomechanical preparation of primary and permanent teeth: an in vitro pilot study

Shradha Jain; Nivedita Saxena; Nikhil Marwah; Priyanka Lekhwani; Anant Nigam; Varun Goyal

doi:10.5114/jos.2026.160095

eISSN: 2299-551X
ISSN: 0011-4553

Journal of Stomatology

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abstract:

Original paper

Comparative assessment of efficacy of automated micromotor and endomotor in biomechanical preparation of primary and permanent teeth: an in vitro pilot study

Shradha Jain

¹

,

Nivedita Saxena

²

,

Nikhil Marwah

^{2, 3}

,

Priyanka Lekhwani

³

,

Anant Gopal Nigam

²

,

Varun Goyal

⁴

Consultant Pediatric Dentist, Glow Teeth and Face Clinic, Raipur, Chhattisgarh, India
Department of Pediatric and Preventive Dentistry, Mahatma Gandhi Dental College, Mahatma Gandhi University of Medical Sciences and Technology, Jaipur, Rajasthan, India
Department of Pediatric and Preventive Dentistry, Dr. D.Y. Patil Dental College and Hospital, Dr. D.Y. Patil Vidyapeeth, Pimpri, Pune, Maharashtra, India
Department of Pediatric and Preventive Dentistry, Vaidik Dental College and Research Center, Daman, India

J Stoma 2026; 79, 1: 10-16

DOI: https://doi.org/10.5114/jos.2026.160095

Online publish date: 2026/03/15

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AMA

Jain S, Saxena N, Marwah N, Lekhwani P, Nigam AG, Goyal V. Comparative assessment of efficacy of automated micromotor and endomotor in biomechanical preparation of primary and permanent teeth: an in vitro pilot study. Journal of Stomatology. 2026;79(1):10-16. doi:10.5114/jos.2026.160095.

APA

Jain, S., Saxena, N., Marwah, N., Lekhwani, P., Nigam, A. G.,  & Goyal, V. (2026). Comparative assessment of efficacy of automated micromotor and endomotor in biomechanical preparation of primary and permanent teeth: an in vitro pilot study. Journal of Stomatology, 79(1), 10-16. https://doi.org/10.5114/jos.2026.160095

Chicago

Jain, Shradha, Nivedita Saxena, Nikhil Marwah, Priyanka Lekhwani, Anant G Nigam,  and Varun Goyal. 2026. "Comparative assessment of efficacy of automated micromotor and endomotor in biomechanical preparation of primary and permanent teeth: an in vitro pilot study". Journal of Stomatology 79 (1): 10-16. doi:10.5114/jos.2026.160095.

Harvard

Jain, S., Saxena, N., Marwah, N., Lekhwani, P., Nigam, A.,  and Goyal, V. (2026). Comparative assessment of efficacy of automated micromotor and endomotor in biomechanical preparation of primary and permanent teeth: an in vitro pilot study. Journal of Stomatology, 79(1), pp.10-16. https://doi.org/10.5114/jos.2026.160095

MLA

Jain, Shradha et al. "Comparative assessment of efficacy of automated micromotor and endomotor in biomechanical preparation of primary and permanent teeth: an in vitro pilot study." Journal of Stomatology, vol. 79, no. 1, 2026, pp. 10-16. doi:10.5114/jos.2026.160095.

Vancouver

Jain S, Saxena N, Marwah N, Lekhwani P, Nigam A, Goyal V. Comparative assessment of efficacy of automated micromotor and endomotor in biomechanical preparation of primary and permanent teeth: an in vitro pilot study. Journal of Stomatology. 2026;79(1):10-16. doi:10.5114/jos.2026.160095.

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Introduction
Pulpectomy is an essential procedure, extending the life duration of pulpally involved primary teeth. Traditionally, only hand instruments were used for endodontic treatment, whereas nowadays, various automated systems are introduced to reduce procedure time and efforts. The study aimed to compare and evaluate the biomechanical preparation of two automated systems, micromotor and endomotor, in deciduous and permanent molars.

Material and methods
Thirty extracted teeth samples were selected for biomechanical preparation in primary and permanent teeth after fulfilling inclusion and exclusion criteria, and were equally divided into three groups. Access opening, followed by biomechanical preparation was carried out in both study groups using automated systems. In control group, manual filing was done in group A, micromotor handpiece with K-file was used in experimental group B, and endomotor with rotary files was used in group C. Biomechanical preparation using automated system was assessed after taking intra-canal impression. Impressions were evaluated using digital camera by assessing taper and flow in the canal.

Results
The micromotor and endomotor systems resulted in a generally higher percentage of impressions achieved with good flow and taper, compared with manual hand preparation. However, a statistically significant difference was observed only for the flow in permanent teeth (p < 0.05).

Conclusions
Both the automated systems, micromotor and endomotor preparations, demonstrated similar results. Therefore, micromotor preparation can be considered an alternative and equally effective method of biomechanical preparation.

keywords:

Comparative assessment of efficacy of automated micromotor and endomotor in biomechanical preparation of primary and permanent teeth: an in vitro pilot study

Shradha Jain 1 , Nivedita Saxena 2 , Nikhil Marwah 2, 3 , Priyanka Lekhwani 3 , Anant Gopal Nigam 2 , Varun Goyal 4

biomechanical preparation, taper, flow, automated micromotor, endomotor

Shradha Jain

¹

,

Nivedita Saxena

²

,

Nikhil Marwah

^{2, 3}

,

Priyanka Lekhwani

³

,

Anant Gopal Nigam

²

,

Varun Goyal

⁴