Cervical margin relocation in indirect adhesive restorations: A literature review

Area of Science:

• Restorative Dentistry
• Periodontology
• Dental Materials

Background:

• Deep subgingival defects pose challenges for indirect adhesive restorations.
• Accurate marginal adaptation is crucial for restoration success.
• Cervical margin relocation (CMR) is a technique to manage deep margins.

Purpose of the Study:

• To review the scientific literature on the cervical margin relocation (CMR) technique.
• To summarize evidence regarding CMR before indirect adhesive restoration cementation.

Main Methods:

• Systematic electronic search of the MEDLINE database via PubMed.
• Keywords included "cervical margin relocation", "coronal margin relocation", "deep margin elevation", and "proximal box elevation".
• Included 7 in vitro studies and 5 clinical reports.

Main Results:

• In vitro studies primarily assessed marginal adaptation; some examined fracture behavior and bond strength.
• Clinical reports detailed treatment protocols.
• No randomized controlled trials or prospective/retrospective clinical studies on CMR were found.

Conclusions:

• Current scientific evidence does not strongly support or refute the use of CMR for deep subgingival defects.
• Randomized controlled clinical trials are essential to evaluate CMR's clinical performance, restoration longevity, and periodontal health.
• Further research is needed to establish reliable evidence for CMR technique.