Ninety percent success in palatal implants loaded 1 week after placement: a clinical evaluation by resonance frequency analysis

Abstract

To investigate the behaviour of early loaded palatal implants when observed with resonance frequency analysis (RFA). 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. 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). 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.

Indikationsspektrum von Gaumenimplantaten bei früh- und spätbelasteten Behandlungskonzepten

“…Initial clinical data on early loading of palatal implants show success rates ranging from 90% to 100% [4][5] and thus do not differ from the success rates associated with conventionally-loaded palatal implants [1-2, 12-13, 17-18]. However, these data refer to indirect forms of anchorage with orthodontic forces of up to 4 N only.…”

“…Initial clinical data on this subject focus on the fundamental applicability of early loading in individual indications [4][5]8].…”

“…Erste klinische Daten hierzu konzentrieren sich primär auf die prinzipielle Anwendbarkeit des frühzeitigen Belastungskonzeptes bei einzelnen Indikationen [4][5]8].…”

Early loading on a maxillary posterior single implant with deepened threads: a case report

“…The conditions for early loading on maxillary posterior single implants were set as 50 Ncm and 70 or more ISQ value/ The initial decrease in the ISQ values within the first 3 weeks has been reported in many studies. 19,20 However, ISQ values at the time of surgery and 1 or 2 weeks after surgery were not decreased but stable in this case. This case report is showing a new possibility of loading protocol at the maxillary posterior area with a deep threaded wide implant.…”

Clinical Study of Temporary Anchorage Devices for Orthodontic Treatment

“…Three implants failed early; they were lost during the healing phase within 12 weeks after placement. Crismani et al 11) reported a success rate of 90% in their study, in which 20 palatal implants were placed in 20 patients. Bantleon et al…”