Analyse des Einflusses virtuell geplanter Unterkieferrekonstruktionen auf die postoperative Rekonstruktionsgenauigkeit und die gesundheitsbezogene Lebensqualität bei Patienten mit ausgedehntem oralen Plattenepithelkarzinom
Analysis of the influence of virtually planned mandibular reconstructions on postoperative reconstruction accuracy and health-related quality of life in patients with extensive oral squamous cell carcinoma
Doctoral thesis
Date of Examination:2023-09-14
Date of issue:2023-07-24
Advisor:PD Dr. Dr. Phillipp Brockmeyer
Referee:Prof. Dr. Philipp Franz Meyer-Marcotty
Referee:Prof. Dr. Thomas Meyer
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Abstract
English
Extensive oral squamous cell carcinoma (OSCC) is associated with functional loss in stomatology (chewing, swallowing, speaking), esthetic limitations, and an associated reduced health-related quality of life (HRQOL). The adjacent jaw bones, which are frequently affected, must be removed during tumor resection and replaced with a free bone graft. To achieve an adequate postoperative reconstructive outcome, surgery is now virtually planned and performed using CAD/CAM-based techniques. In 32 patients with extensive OSCC, we used an in-house procedure for virtual surgical planning and CAD/CAM-based reconstruction with a microvascular bone graft. We performed morphometric analysis of computed tomography scans to compare the accuracy of postoperative reconstruction results with the preoperative baseline. In addition, we assessed patients' quality of life preoperatively and up to one year postoperatively using the University of Washington Quality of Life Questionnaire, version 4 (UW-QOL v4), and investigated the influence of therapy intervention and reconstruction outcomes. We discuss various factors influencing reconstruction outcome and patients' HRQOL to provide meaningful information about possible improvements in the procedures.
Keywords: Oral squamous cell carcinoma; virtual surgical planning; guided surgery; CAD/CAM; HRQOL