What Is Flap Surgery in Facial Reconstruction?
When patients are affected by severe orofacial trauma or injuries, or, as in accidents, they often experience severe debilitation both in terms of function and aesthetics of the face, head, and neck. When the results are usually suboptimal in reconstructive surgery, the operator often faces surgical challenges before grafting due to numerous revisions that may be deemed necessary. This occurs especially in the complicated areas of the human face, where flap prelamination is one of the most preferred techniques for the centralized reconstruction of damaged facial features, especially around the nose and the surrounding tissues such as the paranasal sinuses.
With the advent as well as the development of osseointegrated implants, reconstructive surgery has indeed been revolutionized in its surgical approach system when it comes to the esthetic and functional dental rehabilitation of patients affected by interfacial trauma or injuries. So let us now explore what importance flap prefabrication or flap prelamination procedures hold in modern-day facial reconstructive surgeries and then explore how osseointegrated dental implants in the final phase can help the patient be dentally rehabilitated as well, for restoring complete form and function or near normalcy.
What Is the Difference Between Flap Prefabrication and Prelamination?
In a majority of cases, reconstructive surgery, despite the best efforts of the operator's tactility and experience, would still only partially restore the esthetic and functional aspects of debilitated patients in orofacial trauma or post-surgery. Flap prefabrication does not necessarily need to be followed by prelamination, though both are very closely related concepts and are often confused with each other by some surgeons. Though the clinical applications of flap prefabrication and prelamination are competitively modern-day additions in the field of oral and maxillofacial or reconstructive plastic surgery, these are two distinct surgical techniques that can be used in firstly planning the patient's surgical procedure. Especially when conventional surgical techniques may not always work for complicated cases like severe grade three injuries, burn injuries, severe bony and facial defects, and extensive head and neck cancers, these concepts are implemented to maximum benefit in the reconstruction of the patient’s orofacial complex, keeping in mind both their esthetics and the functional restoration to be performed.
Flap Prefabrication: This is the initial step performed in the field of reconstructive maxillofacial surgery or plastic surgery as well. This term was first coined by surgeons with the introduction of reconstructive surgery techniques of the modern day, with clinical application and approval of this method by Reverend Shen in the early 1980s.
This procedure mainly starts with the surgeon introducing a vascular pedicle into the patient's desired donor tissue. The donor tissue must not have any type of axial blood supply on its own. This ensures that by selecting such a site, after an eight-week or two-month initial period of neovascularization, usually, then the donor tissue would be considered for application onto the recipient bed. After the neovascularization process of donor tissue is complete, it is transferred to the recipient defect based on the operator's consideration and operative assessment of the patient's newly acquired axial vasculature.
Flap Prelamination: This technique is distinct from the above method and was a term first coined in reconstructive surgery by Revered Pribaz and Fine in the year 1994. The definition of “lamination” as we know it is that there is an innate bonding of thin sheets that when combined or together produce a multilayered construction at once. In the field of reconstructive surgery as well, the term “flap prelamination” refers to the initial procedure that can be performed either as an additional step or an alternative to flap prefabrication by the reconstructive maxillofacial surgeon. The prelamination process is used to describe the phenomenon of two or more stages in the construction of a complex structure in perspective to the patient's vascular territory through the addition of composite grafts in layers. This is a three-dimensional concept that is implemented for healing and stabilizing the patient's vascular bed, and also to avoid local complications. Any leaks within this multilayered grafting or reconstruction of the vascular bed would lead to localized inflammation, pain, or other complications during reconstructive surgery. Structural leaks can generally be even more detrimental to patient prognosis and should be hence considered an extremely sensitive complication by the operator to prevent preoperative complications during flap prelamination.
Your maxillofacial or plastic surgeon would decide which technique would be adopted to suit your requirement or consider through pre-operative evaluation, determining the course best for your prognosis.
Flap Maturation: In comparison to the prefabricated flap, the time taken for a prelaminated flap is generally much shorter, according to documented clinical case reports and research studies in reconstructive surgery. This period of maturation or flap healing usually takes place around four to six weeks. The advantage of the flap prelamination technique over prefabrication is that in the composite grafts layered by the surgeon, the process of neovascularization tends to occur over a larger as well as thicker tissue dimension. In the case of a flap prefabrication procedure, there might be a need for intermediate manipulation of tissue again that can cause a procedural delay, or often there may be a need to add in additional graft material as well in prefabrication. With prelamination, these disadvantages are overcome easily, though it is, of course, more technique-sensitive.
Flap Transfer: This is one of the last stages, where the layered vascularization achieved through either technique listed above is now considered integral to the recipient site in the patient undergoing facial reconstruction. Many revisions are often necessary and are carried out by the oral and maxillofacial or plastic surgeons, keeping in mind the patient's expectations from a functional viewpoint.
Conclusion:
Though maxillofacial surgeons face several clinical challenges during the course of operation whether for mandibular or maxillary reconstruction, osseointegrated dental implants can still rehabilitate the patient's jaw effectively, but only after the facial grafting is state of the art or done without any localized complications.
Bone grafts as well as soft tissue grafts hold importance in reconstructive surgery. Without proper grafts in severe surgical cases, dental implants and rehabilitation can easily fail as well. This necessitates the need for effective surgical techniques in such severe cases of orofacial trauma or injuries.
