Correlation among different profile planes used to evaluate lower lip position

The objective of this study was to correlate the soft tissue profile planes proposed by Rickett [Eline], Steiner [S-line], Burstone [B-line], and Holdaway [H-line] used to determine the lower lip position. Pretreatment cephalograms of 150 patients [age 16.2 +/- 4.1 years] were evaluated. Lower lip [labrale inferiorus] position was measured relative to Rickett's E-line, Steiner's S-line, Burstone's B-line and Holdaway's H-line. Pearson correlation was used to determine the degree of correlation between the lower lip positions determined by the four reference planes. All the pairs of variables showed statistically significant correlation [p<0.01]. Strong correlation was found between E-line and S-line [0.868], and between S-line and B-line [0.733]. Rest of the pairs showed moderate to weak correlations. H-line showed weak correlations with rest of the reference lines. This study found little difference in validity among Ricketts E-line, the Steiners S-line or Burstone's B-line. Holdaway's H-line may be used in conjunction with these reference planes

Success rate and pain perception in orthodontic patients receiving bone screws for anchorage: a pilot study

Anchorage enhancement through implants has received much consideration in the past decade. Recently small diameter orthodontic mini screws have been used to reinforce anchorage in orthodontic patients. Added discomfort may influence the patients decision to elect screws as alternatives to more conventional reinforcement systems. The purpose of this study was to evaluate the success rate, and pain anticipation before screw placement, and actual perception after placement based on a ten point Visual Analog Scale. 1.4mm diameter Biotech self tapping mini screws were placed in 11 patients selected for implants. Questionnaires were filled by patients on the first post operative appointment. Results showed that the success rate of mini screws was 86.36%. There was no significant different between the level of pain anticipated and that actually perceived by patients. Conclusively, a large scale study may throw further light on the acceptability and success rate of Orthodontic Mini Screws