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Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin01:26

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Directly acting muscle relaxants like dantrolene and botulinum toxin (BoNT) have distinct mechanisms and applications. Dantrolene, a hydantoin derivative, acts on the ryanodine receptor (RYR1) in skeletal muscle cells. RYR1 are calcium channels present at the sarcoplasmic reticulum membrane. In response to excitation, they release calcium ions from the sarcoplasmic reticulum to the cytosol. Calcium promotes actin-myosin-mediated contraction of muscles.
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Skeletal Muscle Relaxants: Therapeutic Uses01:31

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Skeletal muscle relaxants are used to relax muscle tone and alleviate painful muscle contractions. However, the choice of skeletal muscle relaxants depends on the duration of the surgical procedure in order to minimize potential side effects. Skeletal muscle relaxants like neuromuscular blocking agents [NMBAs] are commonly employed as adjuvants alongside general anesthetics in clinical settings. NMBAs are also used to maintain controlled ventilation during surgery of the larynx or pharynx...
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Local Anesthetics: Clinical Application as Spinal Anesthesia01:11

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Spinal anesthetics are given during lower abdomen and limb surgeries to block sensory and motor neurons. They are administered in the mid to low lumbar regions, primarily acting on the cauda equina's nerve roots. The blockade level depends on the local anesthetic (LA) concentration. Usually, low LA concentrations are sufficient to block sensory fibers, while only high LA concentrations block motor fibers. Other factors like injection volume and speed, the patient's posture, and the drug...
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Local Anesthetics: Mechanism of Action01:23

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Local anesthetics (LAs) block sensory and motor impulses by inhibiting the sodium channels on the nerve cell membranes. This induces temporary loss of sensation, relieving pain in a specific body area.
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Depolarizing Blockers: Pharmocokinetics01:19

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Depolarizing blockers are administered through intravenous injection. Succinylcholine is the most common choice of depolarizing blockers in emergency clinical practices. Although they have a rapid onset, they readily diffuse away from the motor end plate into the extracellular fluid. They are metabolized by enzymes such as liver butyrylcholinesterase and plasma pseudocholinesterases. This produces a short duration of action, typically 5-10 minutes long, unlike nondepolarizing blockers, which...
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Centrally Acting Muscle Relaxants: Therapeutic Uses01:24

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Centrally acting muscle relaxants reduce muscle tone and tension by interfering with the postsynaptic reflexes in the central nervous system.
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Updated: Mar 28, 2026

Ultrasound-guided Botulinum Toxin-A Injections: A Method of Treating Sialorrhea
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Botox Therapy in Dentistry: A Review.

Aftab Azam1, Sunny Manchanda2, Suman Thotapalli3

  • 1Reader, Department of Orthodontics, Saraswati Dental College, Lucknow, Uttar Pradesh, India.

Journal of International Oral Health : JIOH
|December 16, 2015
PubMed
Summary
This summary is machine-generated.

Botulinum toxin offers a novel chemo-denervation treatment for various medical and dental conditions lacking conventional options. This review explores its basic principles and current applications in dentistry, with further details to follow.

Keywords:
Botoxbotulinum toxinbruxismchemodenervationcosmeticsdentistryfacial wrinklestemporomandibular disorders

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Area of Science:

  • Dentistry
  • Neurology
  • Pharmacology

Background:

  • Conventional treatments for numerous medical and dental conditions remain incomplete.
  • Botulinum toxin presents an alternative therapeutic approach via chemo-denervation.

Purpose of the Study:

  • To review the fundamental aspects of botulinum toxin.
  • To summarize its current applications within the field of dentistry.

Main Methods:

  • Extensive internet research was conducted on botulinum toxin in dentistry.
  • Relevant articles and studies were selected, extracted, and summarized.

Main Results:

  • Botulinum toxin functions through a chemo-denervation mechanism.
  • Several applications in dentistry have been identified and summarized.

Conclusions:

  • Botulinum toxin is a viable alternative treatment modality for specific medical and dental conditions.
  • This article provides an introduction to its use in dentistry, with subsequent parts offering more in-depth information.