Registry to Collect Data on Patients Undergoing Segmental Mandibular Defect Reconstruction Following Oral Squamous Cell Carcinoma Resection and Drugs-induced Osteonecrosis

Condition(s) studied

Investigational drug(s) / intervention(s)

Surgical Resection and Reconstruction: One stage reconstruction: Osseous reconstruction is performed in the same surgery of the tumor/mandibular resection. It is also known as immediate or primary reconstruction. Second stage reconstruction: Osseous reconstruction is performed after the tumor/mandibular resection surgery as an independent surgery. After the mandibular resection a temporary alloplastic bridging might be put in place. It is also known as delayed or secondary reconstruction.

Study summary

Prospective will be collected in a minimum of 300 patients presenting with an acquired segmental mandibular defect ≥ 2 cm secondary to OSSC removal and drugs-induced osteonecrosis, and who require mandibular reconstruction.

Eligibility

Primary outcome measure(s)

• Demographics — Baseline until resection surgery approximately 4 weeks
  Demographics (year of birth, height in cm and weight in kilogram, race)
• Comorbidities — Baseline until resection surgery approximately 4 weeks
  Comorbidities assessed by Charlson Comorbidity Index (this score assesses the comorbidity level by considering both the number and severity of predefined comorbidity conditions. It provides a weighted score of a patient's comorbidities which can be used to predict mortality rates
• Nicotine consumption — Baseline until resection surgery approximately 4 weeks
  Current and previous nicotine use will be collected: * Number of years * Time (years) since stopped using (if applicable) * Amount of cigarettes/day
• Patient reported outcome: Oral Health Impact Profile (OHIP) — Baseline/ 3months/ 6 months/ 12 months/ 18 months/ 24 months
  Change in the OHIP over the follow-up period. The Oral Health Impact Profile is providing a comprehensive measure of self-reported dysfunction, discomfort and disability attributed to oral conditions. The OHIP is concerned with impairment and three functional status dimensions (social, psychological, and physical). Respondents are asked to indicate on a five-point Likert scale how frequently they experienced each problem. Response categories for the five-point scale are: "Very often", "Fairly often", "Occasionally", "Hardly ever" and "Never". The OHIP consists of 14 questions in which higher scores indicate worse outcomes.
• Difference of tumor locations of the oral squamous cell cancer — Baseline until resection surgery ( approximately 4 weeks)
  Oral squamous cell carcinoma locations acoording to follwoing regions: * Anterior compartment which includes lower lip, buccal mucosa, anterior vestibule, anterior ridge and anterior floor mouth * Lateral compartment which includes posterior vestibule, posterior alveolar ridge, posterior (lateral) floor of mouth * Retromolar compartment which includes alveolar ridge posterior to last molar, region of wisdom teeth, retromolar triangle ie buccal cheek, soft palate (arch), tonsillar regions * Tongue which includes ventral tongue (undersurface of tongue), lateral rim of tongue, base of tongue
• Difference of tumor staging according to the TNM system — Baseline until resection surgery ( approximately 4 weeks)
  Oral squamous cell carcinoma staging according to TNM (Tumor, Node, Metastasis) system. In the TNM system the "T" refers to the size and extent of the main tumor likert from T0 to T4 whereas T0 is the smallest and T4 the biggest size. The main tumor is usually called the primary tumor. The "N" refers to the number of nearby lymph nodes that have cancer likert for N0 to N3 whereas N0 is the single nearby lymphnode and N3 multiple lymphnodes. The "M" refers to whether the cancer has metastasized likert from M0 to M1 whereas M0 is no distant metastasis and M1 is distant metastasis.
• Difference of surgical duration and hospital stay if resection and reconstruction was performed in one or two stages — Day of resection surgery until day of reconstruction surgery up to 18 months
  * Duration of surgery (skin to skin) in minutes * Length of hospital stay in days * Date of osseous reconstruction (if different from resection surgery) in days
• Difference of surgical procedures of osseous reconstruction — Day of resection surgery until day of reconstruction surgery up to 18 months
  * Numers of Bone and soft tissue flaps to reconstruct the mandible: ie number of pieces in which the donor bone(s) is cut to shape the reconstructed mandible * Type of bone donor/ bone transfer site(s): Vascularized bone flap(s) or composite flaps (ie bone and adjacent soft tissue harvested within the same flap) and type(s)
• Different surgical parameters of tumor and segmental mandibular resection if VSP planning was used — Day of resection surgery until day of reconstruction surgery up to 18 months
  * Use of virtual surgical planning (VSP) for resection: Yes/No. * Only virtual planning and simulation of resection (no 3D printing):Yes/No. * 3D-printed biomodels: Yes/No

Trial sites (19)

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