Computer-Aided Design ; Humans ; Mandibular Fractures ; diagnostic imaging ; surgery ; Mandibular Neoplasms ; diagnostic imaging ; surgery ; Mandibular Reconstruction ; methods ; Surgery, Computer-Assisted ; methods ; Tomography, X-Ray Computed

At present, mandibular defect repair and reconstruction is not only a simple sense of mandibular continuity restoration, but also a restoration of the physiologically positional relationship and movement balance of the upper and lower jaws. Eventually, the implantation of osseointegrated dental implants and implant-supported dental restoration should be accomplished to complete the reconstruction of the functional mandible. The technique can integrate multiple procedures such as fibular bone grafting, simultaneous dental implants and traction osteogenesis, and the perfect integration with digital technology can significantly improve the accuracy of digital dental implant traction technique. This paper will summarize and conclude the key points of the application of digital dental implant traction technique in mandibular defect reconstruction, in order to provide new ideas for the development of digital technique.
Humans ; Mandibular Reconstruction ; Dental Implants ; Dental Implantation, Endosseous/methods* ; Mandibular Neoplasms/surgery* ; Fibula/transplantation* ; Bone Transplantation/methods* ; Mandible/surgery*

INTRODUCTIONA case of spontaneous bone regeneration after mandible resection is reported.

CASE REPORTA 6-year-old boy suffered from ameloblastoma in his right mandible. Six months after haemimandibulectomy, a bone regeneration forming a new form of mandible is seen.

HISTOPATHOLOGYLamellar mature bone was observed. Resection of the large portion of the mandible as the choice of treatment as the tumor was grown extensively. Spontaneous bone regeneration after a mandible resection.

CONCLUSIONUnexpected spontaneous bone regeneration may be explained by the fact that periosteum, as the source of osteogenic cells, might be responsible for this process.

Ameloblastoma ; surgery ; Bone Regeneration ; physiology ; Child ; Humans ; Male ; Mandible ; surgery ; Mandibular Neoplasms ; surgery

Adult ; Cementoma ; pathology ; surgery ; Diagnosis, Differential ; Humans ; Male ; Mandibular Neoplasms ; pathology ; surgery ; Tooth Root ; pathology ; surgery

OBJECTIVETo study the potential and advantages of internal distraction osteogenesis in mandibular functional reconstruction.

METHODSThree types of mandibular distractors were used in eight patients with various mandibular defects due to tumor or cyst resection. The average age of the patients was 31.5 years old (ages ranged from 8 to 54 years). For two patients with ramus defects, specially designed distractors were used to restore the normal ramus height. In two other patients, specially designed trifocal distractors were used. In three patients, vertical distractors were used.

RESULTSAll the mandibles were successfully reconstructed in accordance with the direction and distance designed before operation except in one patient. In that patient the distal 23 mm defect failed to be corrected because of loosening of transport block fixation screws.

CONCLUSIONSMandibular defects can be successfully corrected using internal distraction osteogenesis. Performing mandibular reconstruction using distraction osteogenesis is best done at the time of tumor or cyst resection.

Adult ; Child ; Female ; Humans ; Male ; Mandible ; surgery ; Mandibular Neoplasms ; surgery ; Middle Aged ; Osteogenesis, Distraction ; instrumentation

Adult ; Female ; Humans ; Mandibular Neoplasms ; diagnosis ; pathology ; surgery ; Plasmacytoma ; diagnosis ; pathology ; surgery

In the present study, a fibular osteotomy guide based on a computer simulation was applied to a patient who had undergone mandibular segmental ostectomy due to oncological complications. This patient was a 68-year-old woman who presented to our department with a biopsy-proven squamous cell carcinoma on her left gingival area. This lesion had destroyed the cortical bony structure, and the patient showed attenuation of her soft tissue along the inferior alveolar nerve, indicating perineural spread of the tumor. Prior to surgery, a three-dimensional computed tomography scan of the facial and fibular bones was performed. We then created a virtual computer simulation of the mandibular segmental defect through which we segmented the fibular to reconstruct the proper angulation in the original mandible. Approximately 2-cm segments were created on the basis of this simulation and applied to the virtually simulated mandibular segmental defect. Thus, we obtained a virtual model of the ideal mandibular reconstruction for this patient with a fibular free flap. We could then use this computer simulation for the subsequent surgery and minimize the bony gaps between the multiple fibular bony segments.
Aged ; Carcinoma, Squamous Cell ; Computer Simulation* ; Female ; Free Tissue Flaps ; Head and Neck Neoplasms ; Humans ; Mandible ; Mandibular Nerve ; Mandibular Reconstruction* ; Osteotomy* ; Surgery, Plastic

OBJECTIVETo investigate the application of double-step distraction osteogenesis in the reconstruction of mandibular segmental defects after tumor resection.

METHODSFrom January 2002 to December 2006, six cases of post-tumor unilateral mandibular segmental defects were reconstructed using distraction osteogenesis. The mandibular body was lengthened first, following by mandibular ramus distraction.

RESULTSNo infection or other complication was observed. The maximal distraction length reached 55 millimeter in the mandibular body, and 42 millimeter in the mandibular ramus. The average distraction length was 52 millimeter in the mandibular body, and 34 millimeter in the mandibular ramus. Both the aesthetic and functional result was excellent in all cases.

CONCLUSIONSDouble-step distraction osteogenesis is effective and easily performed in the reconstruction of unilateral mandibular segmental defects with less morbidities and complications. There is no need for donor site. However, the treatment period is relatively long with three staged operations.

Adolescent ; Adult ; Female ; Humans ; Male ; Mandibular Neoplasms ; surgery ; Middle Aged ; Osteogenesis, Distraction ; methods ; Reconstructive Surgical Procedures ; methods ; Young Adult

BACKGROUND: Free fibular flap is one of the most useful methods in the hard tissue reconstruction of the maxilla-mandible. Free fibular flap presents some advantages in which the reconstruction of both soft and hard tissues can be done at the same time. It also provides a safe and successful bone graft for the reconstruction, along with a low rate of complications. Despite these advantages and the rarity of a postoperative complication, particularly in oral and maxillofacial surgery procedures, a prolonged operation might exhibit some complications related with rhabdomyolysis. We experienced the rare event of rhabdomyolysis after oral cancer surgery. CASE PRESENTATION: In this article, we report the case of a patient who developed rhabdomyolysis after undergoing free fibular flap surgery. CONCLUSIONS: Despite the advantages of the free fibular flap operation, clinicians must be aware of the risk of complications because there are multiple factors that could result in rhabdomyolysis, such as duration of operation, position of the subject, and pre-existing conditions of diabetes and hypertension. Once the diagnosis of rhabdomyolysis is confirmed, a prompt treatment plan should be made and applied as soon as possible. This will increase the chance of a full recovery for the patient who is exhibiting symptoms of rhabdomyolysis.
Diagnosis ; Humans ; Hypertension ; Mandibular Reconstruction ; Mouth Neoplasms ; Postoperative Complications ; Preexisting Condition Coverage ; Renal Insufficiency ; Rhabdomyolysis ; Surgery, Oral ; Transplants

Unusual presentation of localized gingival enlargement associated with a subjacent tumoural pathology is reported. The patient was a 55-year-old black male, whose chief complaint was a progressive gingival overgrowth for more than ten years, in the buccal area of the anterior left mandible. According to the clinical features and the radiological diagnosis of odontogenic keratocyst, a conservative surgery with enucleation and curettage was performed. Tissue submitted for histopathological analysis rendered the diagnosis of odontogenic myxoma. After 12-month of follow-up, no evidence of recurrence was found. Clinicians should be cautious when facing any gingival enlargement to avoid diagnostic pitfalls and to indicate the appropriate treatment.
Diagnosis, Differential ; Gingival Overgrowth ; etiology ; pathology ; Humans ; Male ; Mandibular Neoplasms ; complications ; pathology ; surgery ; Middle Aged ; Myxoma ; complications ; pathology ; surgery ; Odontogenic Tumors ; complications ; pathology ; surgery