J Korean Acad Prosthodont.  2018 Apr;56(2):134-140. 10.4047/jkap.2018.56.2.134.

Considerations in the selection of method for clinical crown lengthening

Affiliations
  • 1Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea. doctorcj@gwnu.ac.kr

Abstract

Clinical crown lengthening procedure would be an effective method for overcoming adverse clinical condition such as short abutment length. There are three kinds of methods in clinical crown lengthening, those are, surgical crown lengthening, orthodontic extrusion and surgical extrusion. Clinicians have to try their best to choose a proper method among those for favorable results. This report aims to review the considerations in each method with various cases and to suggest a decision flow for appropriate selection.

Keyword

Clinical crown lengthening procedure; Surgical crown lengthening; Orthodontic extrusion; Surgical extrusion

MeSH Terms

Crown Lengthening*
Crowns*
Methods*
Orthodontic Extrusion

Figure

  • Fig. 1 Surgical crown lengthening. (A) Preprosthetic state, (B) Prosthetic restoration after surgical intervention, (C) Central incisor fracture, (D) Re-restoration with surgical re-entry.

  • Fig. 2 Fixed appliance for extrusion of central incisors.

  • Fig. 3 Fixed appliance for orthodontic extrusion. (A) For extrusion of first molar, (B) Pre-designed wire for extrusion on stone cast.

  • Fig. 4 Force measurement gauge for proper orthodontic movement.

  • Fig. 5 Orthodontic extrusion procedure. (A) Limited clinical crown length of right canine, (B) Fixed wire appliance and elastic chain, (C) Prosthetic restoration, (D) Infraoccluson status of canine.

  • Fig. 6 Surgical extrusion and retention with suture. (A) Pre-operative status, (B) Post-operative status.

  • Fig. 7 Decision flow for the selection of a optimal method among clinical crown lengthening procedures.


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