cross bit

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Noun

cross bit - a rock drill having cruciform cutting edges; used in mining

bore bit, borer, rock drill, stone drill - a drill for penetrating rock

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References in periodicals archive ?

Nurse Carolyn Smith's Staffordshire-Labrador cross bit the man's leg so badly he had to stay off work for eight weeks, and is still taking painkillers six months later, magistrates in Southport heard.

Dog could harm your children, JPs warn

These problems include severe crowding and tooth misalignment, cross bites, improper jawbone growth or harmony, or facial problems.

Image Orthodontics Expands Into the East Bay Market - Helps Local Orthodontist to Transition Patients

For example, cross bits tend to drill a straighter hole than button bits; however, they can be significantly more expensive.

How To Reduce Drill-Hole Deviation: Good Operating Practice Is Key to Mitigating the Problem

In 2004, school children and adolescents were studied for the presence of posterior cross bites [12].

Evaluation of occlusion and orthodontic needs of thirteen-year-old children from Podlaskie voivodeship

These differences include adenoidal face, narrower maxilla, deeper palatal height, retrusive mandible, deficient chin, and long lower face, cross bites, increased overjet, and oral breathing.1-3,5,7-12 A study contributed those differences to the long-term changes in the position of the head, mandible, and tongue in order to maintain airway adequacy during sleep.2

Orofacial findings associated with obstructive sleep apnea in a group of Saudi Children

* All cross bites in which upper arch needs to be widened.

Slow expansion in cleft patient with quad- helix

Button bits normally give higher penetration rates but are more prone to deviation in long holes than cross bits.