The effects of Twin Blocks: A prospective controlled study

Skeletal And DentoalveolarChanges Seen In Class II Div 1 MalOcclusion Cases Treated With Twin Block Appliance- A Cephalometric Study

“…Antanas in his study also found similar results when mandibular length measured from Ar-Pog was compared pre and post. The results were also in accordance with the results of Lund & Sandler 9 and Toth&McNamara.Also maxillary restriction was seen as changes in SNA angle were not satisfactory (0.4 0 ).These findings were similar to the findings of Antanas 1 . No proclination was seen with lower anteriors in our study where as in Antanas 1 study proclination of lower incisors of 3.2 0 was seen.…”

Orthodontics and occlusion

“…5 A simple, two dimensional means of recording the patient's occlusion before, during and after treatment is an aid to good occlusal practice. 6 The conformative approach is the safest way of ensuring that the occlusion of a restoration does not have potentially harmful consequences. 7…”

“…5 A recent investigation has shown that most of the change arising from Twin Block treatment is dental tipping with only a small contribution from a change in the jaw relationship. 6 It is still not known if such treatment changes the size and shape of the jaws or purely the relationship of the upper to the Group Function PRACTICE occlusion lower jaw. This type of treatment, if it works, does provide excellent dental results (Fig.…”

Versatile functional appliance- Twin block

“…Various studies reported that twin block appliance treatment results in, increased mandibular length [13][14][15][16] increased SNB angle, 17-21 no significant restraining effect on maxillary growth 16,19,22,23,24 . But some studies observed some headgear effect resulting in slight inhibition of forward maxillary growth.…”

“…16, 21 Singh and Hodge also concluded that Twin block appliances along with extra oral traction causes growth modulation in specific regions of midfacial complex and changes position of mandible. 25 Lower facial height also increased with twin block therapy, 16,17,19 but Nicole et al demonstrated good vertical control on mandibular plane angle with twin block appliance therapy as compared to Herbst, Bionator and MARA appliances. 26 Another study showed that after twin block treatment, there is significant increase in posterior facial height, total anterior facial height and lower anterior facial height by 3.4 mm,5.5 mm,4.4 mm respectively.…”