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186 rev port estomatol med dent cir maxilofac. 2019;60(4):175-188

bleeding disorders, or intake of medication for osteonecrosis Ethical disclosures
(e.g. oral bisphosphonates) have already been highlighted in
previous reviews. 70,71 Protection of human and animal subjects. The authors
Taking into consideration the possible effect of distal can- declare that the procedures followed were in accordance with
tilevers in implant-supported prostheses, the available evi- the regulations of the relevant clinical research ethics com-
dence does not support any correlation between peri-implant mittee and with those of the Code of Ethics of the World Med-
72
bone loss and cantilever extension. However, minor mechan- ical Association (Declaration of Helsinki).

ical complications were found when cantilevers were pres- Confidentiality of data. The authors declare that they have
73
ent. When this extension is greater than 14 mm and in oc-
clusion with a natural second molar, an increased mechanical followed the protocols of their work center on access to patient
data and for its publication.
74
risk can be expected. This factor was also considered a de-
ciding factor in the present classification. It should be noted Right to privacy and informed consent. The authors have
that the available evidence regarding the role of cantilevers is obtained the written informed consent of the patients or sub-
scarce, heterogeneous, lacks results of clinical trials reporting jects mentioned in the article. The corresponding author is in
appropriate outcomes and often excludes patients with para- possession of this document.
75
functional habits. Therefore, depending on the risk factors
identified during treatment planning, this classification sys-
tem proposes a decrease of tension and stress distribution Conflict of interest
across more implants or a minimally invasive approach when
required by the patient’s systemic condition. The authors have no conflicts of interest to declare.
The values proposed in each CC class may not match all
types of clinical cases as they represent a general averaged
standard. A retrospective cohort analysis reporting the implant
and prosthodontic success of each rehabilitation scheme will references
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16
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