Every procedure strains the body differently
The operator position, the strain pattern and the preventive set for each procedure — drawn from the Asana pillar of The Conscious Clinician. Start Sthira for any of them with one tap.
Scaling & polishing
Operator position: right-handed 9–12 o'clock · left-handed 12–3 o'clock
Strain pattern: Long static neck flexion over the anterior field; sustained pinch grip on the scaler; wrist deviation on the lower arch.
- Patient supine, mouth at your elbow height — look down with the eyes, not the neck.
- Indirect vision with the mirror for the upper arch; move around the clock for the lower.
- Light, sharp instruments and a relaxed modified pen grasp; change hands on the mirror.
- Two-minute wrist and neck reset every 20 minutes.
Restorative / fillings
Operator position: right-handed 10–12 o'clock · left-handed 12–2 o'clock
Strain pattern: Fine work pulls the head to the field; head pitch increases as the cavity gets smaller; handpiece grip and elbow lift.
- Raise the patient and lower your gaze; magnification with a correct declination angle if you use loupes.
- Rubber dam and a stable fulcrum reduce the urge to lean in.
- Elbows at the side, forearms parallel to the floor.
Endodontics
Operator position: right-handed 11–12 o'clock · left-handed 12–1 o'clock
Strain pattern: The longest static postures in dentistry: eyes, neck, shoulders and lumbar spine lock for 45–90 minutes.
- Magnification is almost mandatory — but only if fitted in neutral posture (Drishti check).
- Headrest high, patient's chin up for maxillary teeth; chin down for mandibular.
- Stand and reset every 25 minutes — set a timer before you start the case.
Simple extraction
Operator position: right-handed 8–9 (lower) · 11–12 (upper) · left-handed 3–4 (lower) · 12–1 (upper)
Strain pattern: Force delivered through a twisted trunk and a raised shoulder; bracing with the non-dominant hand.
- Lower the chair for mandibular extractions so the force comes from the shoulder and body, not the wrist.
- Square the shoulders to the tooth — move your feet rather than twisting.
- Controlled, slow luxation beats brute force for the tooth and for your back.
Surgical extraction / implant
Operator position: right-handed 9–12, assistant at 3 · left-handed 12–3, assistant at 9
Strain pattern: Sustained force under loupes with a lean into the field; stress shortens the breath and lifts the shoulders.
- Four-handed dentistry: the assistant retracts and suctions so you don't reach.
- Loupes with a steep declination; headlight so you don't chase the light.
- Breathe out on the effort; drop the shoulders between steps.
Crown & bridge prep
Operator position: right-handed 10–12 o'clock · left-handed 12–2 o'clock
Strain pattern: Precision under magnification — the neck creeps forward without you noticing; eye fatigue drives the head down.
- Check loupe working distance in neutral posture before a long prep.
- Indirect vision for palatal margins.
- Palming and a far-gaze break every 20 minutes.
Orthodontics
Operator position: right-handed 11–1 o'clock · left-handed 11–1 o'clock
Strain pattern: Repetitive reach with the elbows up; shoulder abduction while placing brackets and ligating; wrist repetition.
- Raise the patient so the elbows stay below the shoulders.
- Rest the forearm on the patient's chest-level support where appropriate.
- Alternate hands for ligatures; shoulder rolls between patients.
Paediatric dentistry
Operator position: right-handed 10–12 o'clock · left-handed 12–2 o'clock
Strain pattern: A low chair and a small, moving patient mean bending and side-bending to the child.
- Bring the chair up — a child's mouth should be at the same elbow height as an adult's.
- Knee-to-knee position for the youngest patients.
- Move the stool, not the spine.
Pre-clinical lab · phantom head
Operator position: right-handed 11–12 o'clock · left-handed 12–1 o'clock
Strain pattern: Hours over a low mannequin build forward head posture before the first real patient.
- Raise the phantom head to elbow height — most student strain is a low mannequin, not the task.
- 25-minute timer: stand, chin tucks, shoulder rolls, one minute.
- Learn the clock positions on the phantom; they are the same at the chair.
Pre-clinical lab · bench work
Operator position: right-handed bench at elbow height, light from the left · left-handed bench at elbow height, light from the right
Strain pattern: Wax and tooth carving: head-down, pinch-grip precision for long stretches.
- Raise the work, not the head: a bench riser or an angled board.
- Carve in 20-minute blocks with a wrist and neck reset between.
- Good task lighting prevents the lean-in.
Wellness and education guidance for healthy adults, not treatment. If you have pain, see a physician or physiotherapist.