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Stability of paramedian inserted palatal mini‐implants at the initial healing period: a controlled clinical study
Author(s) -
Nienkemper Manuel,
Pauls Alexander,
Ludwig Björn,
Drescher Dieter
Publication year - 2015
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.12321
Subject(s) - resonance frequency analysis , medicine , implant , dentistry , nuclear medicine , orthodontics , surgery , osseointegration
Objectives To assess the stability development of paramedian in comparison with midpalatal inserted mini‐implants. Material and methods The test group consisted of 21 consecutively treated patients (13.7 ± 4.6 years). In each patient, a mini‐implant was inserted paramedian in the anterior palate. Measurement of the insertion depth ( ID ), the maximum insertion torque ( IT ), and resonance frequency analysis ( RFA ) was performed at T 0. RFA was repeated after 2 weeks ( T 1), 4 weeks ( T 2), and 6 weeks ( T 3). Correlations between measuring methods were calculated. RFA values at different times were tested for statistical differences. Data were compared with a group of patients who received median mini‐implants of the same size. Results Initial stability was 14.06 ± 4.35 Ncm ( IT ) and 26.60 ± 5.28 ISQ ( RFA ) with an ID of 7.02 ± 1.04 mm. RFA and IT ( r = 0.49, P = 0.023) showed a moderate significant correlation. Stability remained relatively constant, showing no significant differences between measurement times. Overall, RFA values decreased non‐significantly by 2.25 ± 6.85 ISQ to a level of 24.35 ± 5.39 after 6 weeks. Comparing development of stability over time, it was found that significant differences were present at T 0 and T 1 ( T 0: −9.54 ISQ , P < 0.0001; T 1: −3.69, P = 0.041). Conclusions Paramedian inserted mini‐implants provided sufficient stability. Showing a lower primary stability, RFA values did not differ from the control group from week four on, as no significant decrease in stability occurred at the initial healing period.