Obturators: A proposed classification and its associated techniques.

Statement of problem: Multiple classifications exist for maxillectomy defects. However, none of the existing classifications describes the defects as favorable or unfavorable from the prosthodontist's standpoint. The most common problem with prosthetic treatment in such patients is in getting adequate retention, stability, and support. The size and location of the defect usually influence the amount of impairment and difficulty in prosthetic rehabilitation.

Proposed classification: A series of cases has been studied, and a newer type of maxillary defect is seen with a better presurgical involvement of the prosthodontist. This type of defects is not present in any of the existing classification; hence, a modification is proposed, and its requisite cast partial framework design is also given. Another treatment-based classification is also proposed for easy treatment planning in these cases. A case series of maxillectomy patients with varying types of defects rehabilitated with obturators with different designs, modes of retention, and fabrication procedure in accordance to the newer classification is described.

Discussion: Surgical intervention creates communication among the oral cavity, nasal cavity, and maxillary sinus. The obturator prosthesis is commonly used as an effective means for rehabilitating such cases. There is a plethora of classifications available for maxillectomy defects though none of them takes existing dentition into consideration. While remaining dentition and various other favorable and unfavorable factors decide on the final prognosis of the prosthesis. Hence, a newer classification was planned with keeping in mind newer treatment modalities.

Conclusions: Prosthodontic rehabilitation with obturator prosthesis design and manufactured by various principles and techniques restores the missing structures and acts as a barrier between the communication among the various cavities and definitely improving their quality of life. Considering the complexities of maxillary anatomy, the various permutations of the maxillectomy defect, the current trends in surgical management with presurgical prosthodontic planning, and various prosthodontic treatment options available, it is imperative that a more objective modification of the current classification described in this article is warranted for and could be more operator friendly in finalizing and communicating of the treatment plan.