Best bonders make best orthodontist

In olden days best wire benders made best orthodontist but today best bonders make best orthodontist. Bracket positioning determines the quality and speed of your treatment with straightwire appliance.

Before we go further all dentists must read this news by clicking on these links, and you will avoid all future problems in your clinic....
Dentist who danced while working
Dentists did to his patients, that should never be done

To very interesting studies just published in month in leading ortho journals:

What is the best method to bond the brackets ? Center of tooth or incisal edge?

A comparison of accuracy in bracket positioning between two techniques—localizing the centre of the clinical crown and measuring the distance from the incisal edge David Armstrong^*, Gang Shen^*, Peter Petocz^** and M. Ali Darendeliler^*

The European Journal of Orthodontics 2007 29(5):430-436

The placement of orthodontic brackets is guided either by localizing the centre of the clinical crown (CC) or by measuring the distance from incisal edge (ME). The purpose of this study was to examine if there are any significant differences in the accuracy of bracket positioning between these two techniques.

Typodont models were simulated with a Class I malocclusion with severe crowding. Nineteen experienced orthodontists (12 males, seven females) with a mean age of 40.6 years bonded pre-adjusted straight-wire brackets (Victory MBT) on the typodonts. Each orthodontist was asked to bond 20 brackets on one typodont using the CC method and 20 brackets on another typodont using the ME method. The teeth were removed from the typodont and photographed for imaging analysis. The errors of bracket placement in the vertical, mesiodistal, and angular/tip dimensions were measured and the data were statistically assessed.

Analysis of the teeth individually showed that the ME method was better in the vertical positioning for several upper and lower anterior teeth (P <> the upper first premolars. The mean time taken to bond the 20 brackets showed no significant difference between two methods (CC 28.53 ± 9.51 versus ME 28.21 ± 10.43 minutes, P > 0.05). It is suggested that bracket bonding guided by measuring the distance from incisal edge may result in improved placement for anterior teeth. Archwire bending or bracket repositioning is still necessary to compensate for the inaccuracies with both techniques.

Did you know that deep bite has a relation to fusion of your cervical vertebra ?

Cervical vertebral body fusions in patients with skeletal deep biteLiselotte Sonnesen^*,** and Inger Kjær^*

The European Journal of Orthodontics 2007 29(5):464-470

Cervical column morphology was examined in 41 adult patients with a skeletal deep bite, 23 females aged 22–42 years (mean 27.9) and 18 males aged 21–44 years (mean 30.8) and compared with the cervical column morphology in an adult control group consisting of 21 subjects, 15 females, aged 23–40 years (mean 29.2 years) and six males aged 25–44 years (mean 32.8 years) with neutral occlusion and normal craniofacial morphology. None of the patients or control subjects had received orthodontic treatment.

In the deep bite group, 41.5 per cent had fusion of the cervical vertebrae and 9.8 per cent posterior arch deficiency. The fusion always occurred between C2 and C3. No statistically significant gender differences were found in the occurrence of morphological characteristics of the cervical column (females 43.5 per cent, males 38.9 per cent). Morphological deviations of the cervical column occurred significantly more often in the deep bite group compared with the control group.

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