Repair of segmental bone defects in the maxilla by transport disc distraction osteogenesis: Clinical experience with a new device

Boonzaier, James; Vicatos, George; Hendricks, Rushdi

doi:10.4103/2231-0746.161087

Cited by 1 publication

(2 citation statements)

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“…Concurrently, the new design of the distractor allows the mobile component to be split into segments; hence, the term “Tandem distractor.” This concept eliminated the problem of the weak anchoring of the transport disk onto its cradle as previously described by Boonzaier et al in 2015. [18]…”

Section: Discussionmentioning

confidence: 99%

“…[121314151617] However, the creation of bone and soft tissue along a curved trajectory has only recently been successfully accomplished in the maxilla. [1819] The present distractor is an improvement on the previous three prototypes[14] and employs the concept of tetrafocal distraction by means of hybridizing the bone with the tooth in the transport disk segment [Figure 1]. This article describes the new design as well as the modification of the surgical protocol.…”

Section: Introductionmentioning

confidence: 99%

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Creation of bone and soft tissue in postmaxillectomy patients using curvilinear transport distraction osteogenesis

Hendricks

Vicatos

2019

Ann Maxillofac Surg

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Background:Large surgical defects in the maxilla due to trauma or tumor are usually reconstructed with revascularized-free fibula flaps (RFFF). In the past, the use of curvilinear transport distraction osteogenesis (CTDO) has been shown to be an efficacious way in closing large defects in the maxilla, but it had limitations which have now been overcome by the present development. The present distractor is an improvement upon the previous three prototypes and employs the concept of tetrafocal distraction by means of hybridizing the bone with the tooth in the transport disc segment. This article aims to prove that tetrafocal distraction provides a viable alternative to the RFFF.Materials and Method:In a prospective cohort study of six postmaxillectomy patients, the method of CTDO was applied and investigated to ascertain the outcome. The regenerate bone was compared with the parent bone, using a new maxillary transport distractor. A linear bicortical fracture was created in the maxilla in a vertical direction (segmentally) to develop a mobile, vascularized transport disk. This transport disk underwent further subdivision to produce the concept of tetrafocal distraction.Results:After osseointegration of the dental implants, prosthetic rehabilitation of the dentition was successful. The authors report the successful outcome of two of the six cases subjected to CTDO to treat defects ranging from 25 mm (using bifocal distraction) to 80 mm along a curved trajectory (using tetrafocal distraction).Conclusions:The production of curvilinear bone and soft tissue along a horizontal plane has been demonstrated. From a clinical perspective, the new alveolar bone achieved the correct width and height to create a physiological vestibule and an esthetic zone for dental implants. In addition, the shape of the palatal vault is also reconstituted. The tetrafocal method of the CTDO is a reliable method of maxillary reconstruction.

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Section: Discussionmentioning

confidence: 99%