Excessive occlusal load on chemically modified and moderately rough titanium implants restored with cantilever reconstructions. An experimental study in dogs.

Lima, Luiz A; Bosshardt, Dieter D.; Chambrone, Leandro; Araújo, Mauricio G; Lang, Niklaus P. (2019). Excessive occlusal load on chemically modified and moderately rough titanium implants restored with cantilever reconstructions. An experimental study in dogs. Clinical oral implants research, 30(11), pp. 1142-1154. Wiley-Blackwell 10.1111/clr.13539

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OBJECTIVE To evaluate the outcomes of excessively loaded implants. MATERIAL AND METHODS In five dogs, all mandibular premolars were extracted. After 3 months, six implants (three SLA® and three SLActive®) were placed (S). After 4 weeks, implants were restored: one single crown with stable occlusal contacts (SC), one crown and a cantilever unit with excessive occlusal contacts (OL), and a non-loaded implant (NL). Bleeding-on-probing (BoP), attachment level (AL), mucosal margin (GM) were assessed. Resonance frequency analysis (RFA) was assessed weekly. Standardized X-rays were taken at S, 4 and 24 weeks. RESULTS Similar findings were observed for SLA® and SLActive® implants regarding PlI, GI, GM, AL, and BL. No significant differences were detected between baseline and 24-weeks or between treatment modalities for all clinical parameters (p > .05). Six months after loading, RFA values were significantly greater than at implant placement. No significant differences between treatment modalities were found. Linear radiographic measurements yielded similar results between SLA® and SLActive® implants. SLA® OL implants yielded a statistically significant gain on peri-implant bone density over all other groups (p = .012). Radiographic results were confirmed by descriptive histology. Technically, loosened occlusal screws occurred in 13.3% (SC = 3.3%; OL = 10%), while abutment fractures totalized 23.3% (SC = 6.6%; OL = 16.6%). CONCLUSIONS Excessive occlusal load applied to implants (SLA® or SLActive®) restored with cantilevers did not cause loss of osseointegration or significant changes in their clinical, radiographic, or histologic outcomes. Early excessive occlusal load on SLA® implants promoted a gain in peri-implant bone density. Excessively loaded implants showed more technical complications.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > School of Dental Medicine > School of Dental Medicine, Periodontics Research
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Craniomaxillofacial Surgery

UniBE Contributor:

Bosshardt, Dieter and Lang, Niklaus Peter


600 Technology > 610 Medicine & health








Caroline Dominique Zürcher

Date Deposited:

03 Dec 2019 12:42

Last Modified:

03 Dec 2019 12:52

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

animal experiment cantilever extensions early load excessive occlusal load marginal bone level occlusal overload osseointegration technical complications titanium implants titanium surface





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