Nance Appliance
The Nance button or Nance holding arch is a kind of plastic button that is positioned on the palate behind the upper incisors and is attached to strips on the 1st molars by means of stiff steel wires. The Nance prevents the 1st molars from moving forwards thereby retaining enough space for the remaining teeth […]
Nervus
Latin for “nerve”
Neutral bite/eugnathia
The ideal occlusion of the upper and lower arches. The lower molars are placed a half premolar width in front of their antagonists and most of them have an ideal cusp-fossa-intercuspation. In addition, it shows an anterior overbite of 2 to 3 mm.
Neutral Occlusion
This term refers to the most common and functionally best denticulation of the upper and lower sets of teeth. With neutral occlusion, the lower 1st molars are about 3-4mm in front of the upper ones producing an ideal cusp-fossa contact relationship. Neutral occlusion also entails a normal horizontal and vertical incisors’ overbite of 2-4mm. Common […]
Nickel Titanium
Nickel Titanium (NiTi) is an alloy made from nickel and titanium, which has been used more and more in orthodontics since the 1980’s, particularly in the manufacture of orthodontic wires but also for the locking-clip on the Speed-Bracket. Most nickel titanium wires are about 25% more rigid than steel wire of a corresponding thickness. For […]
NiTi
See Nickel Titanium
Non-Occlusion
This term refers to an incorrect bite of the molars whereby the chewing surfaces of opposing teeth do not make any contact at all. In Germany this finding is also called “Scherenbiss” (= scissor bite). As a rule, non-occlusion should be treated because, if it is not, this could lead to an increasing number of […]
NTI
Nociceptive Trigeminal Inhibition Tension Suppression System (= NTI or NTIss), in German: „Schmerzhemmendes trigeminales Hemmungs- und Unterdrückungssystem“. It’s an occlusal splint with contact to several front teeth and not very different from the common splints. Teeth grinders who grind away on their splints benefit from NTI, because the pain stimulus given by NTI inhibits the […]