ANSWERS

What is crown lengthening?

Crown lengthening is a surgical procedure that removes gum tissue, and sometimes bone, to expose more of a tooth's structure above the gumline. Periodontists and oral surgeons perform it before restorative work when a tooth lacks enough vertical height for a crown to seat properly, or to correct a gummy smile.

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Why it works this way

Why crown lengthening exists in the restorative workflow

Crown lengthening solves a structural problem: there isn't enough sound tooth above the gumline for a crown margin to grip. The American Academy of Periodontology defines the biologic width as roughly 2.04 mm of soft tissue attachment above the alveolar crest. If a crown margin violates that zone, the body responds with chronic inflammation, bone loss, or both. Crown lengthening repositions the gingiva and, in functional cases, the bone, so the restoration sits in a stable environment.

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How long after crown lengthening can the final crown be seated?

Most restorative workflows wait 6 to 12 weeks after functional crown lengthening before taking final impressions. Soft tissue continues to mature for up to 6 months, but the gingival margin is stable enough for a final prep and scan by week 6 to 8 in most cases. Anterior esthetic cases benefit from waiting closer to 12 weeks because the gingival zenith position drives the final result. Provisionals carry the tooth during the healing window.

Does crown lengthening always involve bone removal?

No. Gingivectomy-only crown lengthening (soft tissue removal without osseous recontouring) is appropriate when the biologic width can be re-established by removing gum tissue alone, typically in esthetic cases where there is excess keratinized tissue. Functional cases where decay or fracture extends below the alveolar crest require osseous recontouring to re-establish the 2 to 3 mm of sound tooth structure above the bone that a crown margin needs for long-term stability.

What information should be on the lab prescription for a crown lengthening case?

Note the date of the crown lengthening surgery, the type performed (soft tissue only vs osseous recontouring), and which teeth were involved. Include the pre-op scan if one was taken and flag the post-op scan date so the lab knows tissue has had time to mature. At Dani Dental the technician assigned to the case is named on the case docket, and the referring dentist gets a direct line for shade verification or contour questions before the crown is seated.

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This answer is one piece of a larger workflow. The pillar page covers materials, turnaround, and how we build the case to your specification.

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