Skip to main content

Mouth Retractors for Buccal Mucosa Graft Harvest

Adequate intraoral exposure is the first and most underappreciated step of a successful buccal mucosa graft (BMG) harvest. Good exposure shortens harvest time, reduces graft trauma, and avoids inadvertent injury to the parotid duct or the lower lip. Several mouth-retractor options exist — most surgeons develop a preference for one based on the mouth size they typically encounter and the side (unilateral vs bilateral) they plan to harvest.

Options​

Denhardt Mouth Gag​

A ratcheted, spring-loaded jaw opener with flat tooth-pad blades that fits between the molars. Provides stable mouth opening with a fixed separation once set, freeing the surgeon and assistant from actively holding the mouth open.

  • Good for: solo or lightly assisted harvest, longer harvests, bilateral harvest
  • Trade-off: wider profile; can obstruct access to the posterior cheek mucosa in a small mouth

Molt Mouth Gag​

A ratcheted spreader similar in concept to the Denhardt, with narrower tooth pads and a compact profile. Common in oral and maxillofacial surgery; works well for BMG when the Denhardt is too bulky.

  • Good for: small mouths, posterior cheek exposure
  • Trade-off: less stable than the Denhardt for prolonged cases

Jennings Mouth Gag​

A side-opening spreader with curved blades that fit against the molars laterally. Provides excellent lateral jaw separation without occupying the midline.

  • Good for: anterior floor-of-mouth work (not typical for BMG) — less used for buccal harvest
  • Mentioned for completeness; some teams use it when the mouth-gag storage is limited

Minnesota Retractor (Cheek Retractor)​

A single-handed curved blade retractor for lateral cheek retraction — does not hold the mouth open on its own but retracts the cheek laterally once the mouth is opened (by bite-block or gag).

  • Good for: assistant-driven lateral retraction while the surgeon harvests
  • Standard pairing with a bite block or Denhardt for intraoperative BMG access

Seldin / Lip Retractor​

A simple lip retractor (often Seldin-style) that pulls the lower or upper lip outward and protects the lip vermillion from stretching injury during harvest.

  • Good for: protecting the lip during prolonged retraction
  • Used with other retractors, not alone

Bite Block​

Not strictly a retractor, but an essential adjunct — a soft plastic or rubber block placed between the contralateral molars holds the mouth open passively when the patient is relaxed under anesthesia. Often combined with a Minnesota for cheek retraction.

  • Good for: small, quick harvests where a formal mouth gag is excessive
  • Trade-off: less stable than a ratcheted gag for extended exposure

Choosing a Setup​

A reasonable default setup for BMG harvest:

  • Denhardt mouth gag on the contralateral side (or across the arch)
  • Minnesota retractor for cheek retraction on the harvest side
  • Lip retractor to protect the ipsilateral corner of the mouth
  • Stay sutures at the superior and inferior edges of the planned graft outline, tied to the cheek retractor to flatten the donor surface

Local preference and institutional availability drive most of the variation. The principles are constant: mouth held open stably, cheek retracted laterally, lip protected, graft site taut and dry, parotid duct (Stensen's duct, opposite the second maxillary molar) identified and avoided.

See also: Buccal Mucosa Graft, The Oral Cavity.