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Ninety percent success in palatal implants loaded 1 week after placement: a clinical evaluation by resonance frequency analysis
Author(s) -
Crismani Adriano Giacomo,
Bernhart Thomas,
Schwarz Kerstin,
Čelar Aleš Gaetano,
Bantleon HansPeter,
Watzek Georg
Publication year - 2006
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/j.1600-0501.2005.01223.x
Subject(s) - resonance frequency analysis , implant stability quotient , medicine , dentistry , implant , orthodontics , mean value , surgery , osseointegration , mathematics , statistics
Purpose: To investigate the behaviour of early loaded palatal implants when observed with resonance frequency analysis (RFA). Subject, material and methods: Twenty patients (seven males and 13 females, mean age 26.4 years) received one palatal implant each (length: 4 mm, diameter: 3.3 mm; Orthosystem ® ) for maximum orthodontic anchorage. The implants' stability was observed by RFA. Measurements were carried out at the time of surgery, after first orthodontic loading and subsequently once a week over a period of 12 weeks. Results: Two palatal implants were lost. The other 18 remained stable. The average period from insertion to first loading was 6.7±0.8 days. The mean orthodontic force applied was 272.2±73.2 cN. The implant stability quotient (ISQ) value at the time of surgery averaged 69.4±3.9. The mean ISQ value 6.7 days after insertion was 69.8±3.6. Twelve weeks post‐surgery the mean ISQ value was 69.8±3.5. A statistically significant decrease in stability was observed after 2 and 3 weeks post‐surgery ( P =0.005 and 0.04). Conclusion: The behaviour of early loaded palatal implants showed an initial decrease of the ISQ values. From 6 weeks post‐surgery onward the ISQ values increased. Within the limitations of this study, the results suggest that the healing time of palatal implants reported in the literature (12 weeks) should be discussed. An orthodontic loading of palatal implants 6 weeks post‐surgery with a force up to 400 cN seems to be justified. Yet further investigations are necessary to evaluate the behaviour of early loaded palatal implants considering observation periods of over 12 weeks.