Background: Recording jaw movement rhythms in patients with jaw defects is challenging using conventional tracking devices. However, masticatory rhythm is crucial for masticatory performance and nutritional intake. Th...Background: Recording jaw movement rhythms in patients with jaw defects is challenging using conventional tracking devices. However, masticatory rhythm is crucial for masticatory performance and nutritional intake. This study aimed to explore the impact of using a maxillofacial prosthesis to restore masticatory rhythm in mandibulectomy patients with a novel wearable device. Methods: Twelve patients who underwent mandibulectomy and were rehabilitated with maxillofacial prosthesis were recruited. Chewing rate, cycle durations, coefficient of variation of cycle durations (CV), changing times of skin morphology on the back of the ear pinna area (SM), and masticatory performance were measured during gum chewing without and with a denture using a wearable jaw movement rhythm tracking device. A paired t-test and the Pearson correlation coefficient were used for statistical analysis. Results: The chewing rate increased by 8.6 cycles/min with dentures (P P = 0.01). The CV and SM decreased with dentures (P = 0.004 and P = 0.01, respectively). Significant correlations were found between the CV and SM without dentures (P = 0.004). Conclusion: 1. Wearing maxillofacial prostheses can improve masticatory rhythm in patients who undergo mandibulectomy with Eichner B2 occlusal supports. 2. The wearable device is available for measuring masticatory rhythm in patients with jaw defects in clinics. 3. Changing times of the skin morphology on the back of the ear pinna indicate jaw movement stability through a simpler process than the coefficient of variation of cycle durations.展开更多
Mandibulectomy is a surgery that leads to heavy aesthetic and functional sequelae. Surgical complications have been noted but have not yet been evaluated. The aim of this study was to evaluate the surgical complicatio...Mandibulectomy is a surgery that leads to heavy aesthetic and functional sequelae. Surgical complications have been noted but have not yet been evaluated. The aim of this study was to evaluate the surgical complications of mandibulectomy. This is a retrospective descriptive and analytical study of patients who underwent mandibulectomy in the Department of Maxillofacial Surgery of the CHU JDR Befelatanana between January 2017 and December 2020. A correlation between the occurrence of complications, parameters related to the patients and those related to the surgery was sought. Patient-related parameters were: age and sex, comorbidities, toxic habits and body mass index. The parameters related to the surgery which were studied were the duration of the intervention, the size and the seat of the bone defect, the interruption or not of the mandibular continuity. Forty-six cases were selected. The average age was 36.98 years and the sex ratio was 0.7. Fifty percent of patients developed surgical complications. The total number of complications was 38. Salivary fistula was the most frequent complication (26.32%). No correlation was found between the occurrence of complications and patient-related parameters. There were 69.57% of complications when the procedure lasted more than 180 minutes (p = 0.003). A correlation was found between the occurrence of complications and the size of the resected bone (p = 0.009). Among the complications, 56.52% occurred when the size exceeded 130 mm (p = 0.03). The complication rate is high. The size of the resected bone and the duration of the operation influence the occurrence of complications.展开更多
Introduction: Oral health management is often difficult in patients after surgical tumor resection and/or radiotherapy due to defects, bulky flaps, limitation of tongue movement, and trismus. In addition, patients who...Introduction: Oral health management is often difficult in patients after surgical tumor resection and/or radiotherapy due to defects, bulky flaps, limitation of tongue movement, and trismus. In addition, patients who have undergone radiotherapy have serious disabilities such as oral mucositis, mucosal weakening, soft tissue fibrosis, salivary gland disorder, and osteoradionecrosis. Dental hygienists must understand the characteristics of patients after surgical tumor resection and/or radiotherapy. In this report, the oral health management of three patients after maxillectomy, mandibulectomy, and radiotherapy was shown. Case Description: Case 1: A 53-year-old male patient visited our clinic after chemotherapy, radiotherapy, and partial maxillectomy for cancer of the right maxillary gingiva. Case 2: A 65-year-old male patient visited our clinic after radiotherapy for a right-sided tongue cancer, partial mandibulectomy of the right tongue to the oropharynx, a right-sided segmental mandibulectomy and a speech aid and a mandibular prosthesis were provided. Case 3: A 36-year-old female visited our clinic for radiotherapy for left-sided tongue cancer. Dental hygienists provided oral health management to the patients. In oral health management, it was suggested that intervention before cancer treatment, oral hygiene instructions tailored to patients’ symptoms, and frequent professional care are important. Conclusion: Oral health management by dental hygienists is extremely important for patients undergoing maxillofacial cancer treatment to maintain their quality of life in the long term.展开更多
Microvascular free flap surgery has become a successful and reliable method of reconstruction following head and neck cancer resection. The effectiveness of free flap reconstruction has increased with improved surgica...Microvascular free flap surgery has become a successful and reliable method of reconstruction following head and neck cancer resection. The effectiveness of free flap reconstruction has increased with improved surgical technique as well as technological refinement in vessel selection and flap monitoring. Few papers have studied the factors that influence success or failure rates of free flap reconstructions, particularly with an eye towards the technologic advancements that have refined the procedure in the last several decades. Here we present a comprehensive review of perioperative and intraoperative considerations that influence free flap outcomes as well methods of vessel selection and flap monitoring important during microvascular reconstruction of the head and neck.展开更多
BACKGROUND Ossifying fibroma is a type of benign fibro-osseous lesion.Most lesions affect the mandible region,particularly the molar and pre-molar areas.It predominantly affects females between the second to fourth de...BACKGROUND Ossifying fibroma is a type of benign fibro-osseous lesion.Most lesions affect the mandible region,particularly the molar and pre-molar areas.It predominantly affects females between the second to fourth decades of life.Larger ossifying fibroma tumors require more extensive resection.CASE SUMMARY A 39-year-old female complained of occasional pain and tumor enlargement on her left jaw for the 3 years prior to presentation.Intraoral examination revealed a firm swelling on her left lower gum.Extraoral examination revealed swelling on the left mandible body with no erythema and superficial ulcer.Computed tomography scan revealed a circular-shaped lesion on the patient’s left mandible body with a well-defined radiolucent border,sized 3.2 cm×2.8 cm×0.9 cm.The tumor was removed by marginal mandibulectomy.Biopsy from the resected tumor suggested cemento-ossifying fibroma(COF).CONCLUSION COF is often unnoticed,but this slow-growing tumor can cause significant symptoms regarding its distortion into adjacent structures.展开更多
The subscapular system can confer numerous flaps for the reconstruction of composite mandibular defects.This chapter aims to review the indications,advantages,and anatomy of subscapular system flaps in the reconstruct...The subscapular system can confer numerous flaps for the reconstruction of composite mandibular defects.This chapter aims to review the indications,advantages,and anatomy of subscapular system flaps in the reconstruction of the mandible.The subscapular system can serve as an alternative to the fibula free flap in the presence of significant atherosclerotic disease or other contraindications.The flexibility and abundance of its soft tissue components make this system particularly advantageous for complex composite defects.Avoiding a fibula free flap for osseous reconstruction of the mandible permits early patient mobilization and may prevent adverse postoperative complications.A long pedicle can be harvested with subscapular flaps,which may prove useful in the face of limited available recipient vessels.Critics of the subscapular system cite longer operative times due to the need for patient repositioning and concerns over the integrity of the bone stock.Positioning modifications may permit a two-team approach to subscapular reconstruction,thus limiting operative times.Subscapular harvest does incur shoulder morbidity;however,this does not appear to affect the quality of life significantly.The flap is reliable and can support endosseous implants if properly planned,though it may be more susceptible to bone resorption when compared to the fibula.Overall,the subscapular system remains a versatile donor that can achieve ideal reconstructive outcomes with minimal morbidity.展开更多
文摘Background: Recording jaw movement rhythms in patients with jaw defects is challenging using conventional tracking devices. However, masticatory rhythm is crucial for masticatory performance and nutritional intake. This study aimed to explore the impact of using a maxillofacial prosthesis to restore masticatory rhythm in mandibulectomy patients with a novel wearable device. Methods: Twelve patients who underwent mandibulectomy and were rehabilitated with maxillofacial prosthesis were recruited. Chewing rate, cycle durations, coefficient of variation of cycle durations (CV), changing times of skin morphology on the back of the ear pinna area (SM), and masticatory performance were measured during gum chewing without and with a denture using a wearable jaw movement rhythm tracking device. A paired t-test and the Pearson correlation coefficient were used for statistical analysis. Results: The chewing rate increased by 8.6 cycles/min with dentures (P P = 0.01). The CV and SM decreased with dentures (P = 0.004 and P = 0.01, respectively). Significant correlations were found between the CV and SM without dentures (P = 0.004). Conclusion: 1. Wearing maxillofacial prostheses can improve masticatory rhythm in patients who undergo mandibulectomy with Eichner B2 occlusal supports. 2. The wearable device is available for measuring masticatory rhythm in patients with jaw defects in clinics. 3. Changing times of the skin morphology on the back of the ear pinna indicate jaw movement stability through a simpler process than the coefficient of variation of cycle durations.
文摘Mandibulectomy is a surgery that leads to heavy aesthetic and functional sequelae. Surgical complications have been noted but have not yet been evaluated. The aim of this study was to evaluate the surgical complications of mandibulectomy. This is a retrospective descriptive and analytical study of patients who underwent mandibulectomy in the Department of Maxillofacial Surgery of the CHU JDR Befelatanana between January 2017 and December 2020. A correlation between the occurrence of complications, parameters related to the patients and those related to the surgery was sought. Patient-related parameters were: age and sex, comorbidities, toxic habits and body mass index. The parameters related to the surgery which were studied were the duration of the intervention, the size and the seat of the bone defect, the interruption or not of the mandibular continuity. Forty-six cases were selected. The average age was 36.98 years and the sex ratio was 0.7. Fifty percent of patients developed surgical complications. The total number of complications was 38. Salivary fistula was the most frequent complication (26.32%). No correlation was found between the occurrence of complications and patient-related parameters. There were 69.57% of complications when the procedure lasted more than 180 minutes (p = 0.003). A correlation was found between the occurrence of complications and the size of the resected bone (p = 0.009). Among the complications, 56.52% occurred when the size exceeded 130 mm (p = 0.03). The complication rate is high. The size of the resected bone and the duration of the operation influence the occurrence of complications.
文摘Introduction: Oral health management is often difficult in patients after surgical tumor resection and/or radiotherapy due to defects, bulky flaps, limitation of tongue movement, and trismus. In addition, patients who have undergone radiotherapy have serious disabilities such as oral mucositis, mucosal weakening, soft tissue fibrosis, salivary gland disorder, and osteoradionecrosis. Dental hygienists must understand the characteristics of patients after surgical tumor resection and/or radiotherapy. In this report, the oral health management of three patients after maxillectomy, mandibulectomy, and radiotherapy was shown. Case Description: Case 1: A 53-year-old male patient visited our clinic after chemotherapy, radiotherapy, and partial maxillectomy for cancer of the right maxillary gingiva. Case 2: A 65-year-old male patient visited our clinic after radiotherapy for a right-sided tongue cancer, partial mandibulectomy of the right tongue to the oropharynx, a right-sided segmental mandibulectomy and a speech aid and a mandibular prosthesis were provided. Case 3: A 36-year-old female visited our clinic for radiotherapy for left-sided tongue cancer. Dental hygienists provided oral health management to the patients. In oral health management, it was suggested that intervention before cancer treatment, oral hygiene instructions tailored to patients’ symptoms, and frequent professional care are important. Conclusion: Oral health management by dental hygienists is extremely important for patients undergoing maxillofacial cancer treatment to maintain their quality of life in the long term.
文摘Microvascular free flap surgery has become a successful and reliable method of reconstruction following head and neck cancer resection. The effectiveness of free flap reconstruction has increased with improved surgical technique as well as technological refinement in vessel selection and flap monitoring. Few papers have studied the factors that influence success or failure rates of free flap reconstructions, particularly with an eye towards the technologic advancements that have refined the procedure in the last several decades. Here we present a comprehensive review of perioperative and intraoperative considerations that influence free flap outcomes as well methods of vessel selection and flap monitoring important during microvascular reconstruction of the head and neck.
文摘BACKGROUND Ossifying fibroma is a type of benign fibro-osseous lesion.Most lesions affect the mandible region,particularly the molar and pre-molar areas.It predominantly affects females between the second to fourth decades of life.Larger ossifying fibroma tumors require more extensive resection.CASE SUMMARY A 39-year-old female complained of occasional pain and tumor enlargement on her left jaw for the 3 years prior to presentation.Intraoral examination revealed a firm swelling on her left lower gum.Extraoral examination revealed swelling on the left mandible body with no erythema and superficial ulcer.Computed tomography scan revealed a circular-shaped lesion on the patient’s left mandible body with a well-defined radiolucent border,sized 3.2 cm×2.8 cm×0.9 cm.The tumor was removed by marginal mandibulectomy.Biopsy from the resected tumor suggested cemento-ossifying fibroma(COF).CONCLUSION COF is often unnoticed,but this slow-growing tumor can cause significant symptoms regarding its distortion into adjacent structures.
文摘The subscapular system can confer numerous flaps for the reconstruction of composite mandibular defects.This chapter aims to review the indications,advantages,and anatomy of subscapular system flaps in the reconstruction of the mandible.The subscapular system can serve as an alternative to the fibula free flap in the presence of significant atherosclerotic disease or other contraindications.The flexibility and abundance of its soft tissue components make this system particularly advantageous for complex composite defects.Avoiding a fibula free flap for osseous reconstruction of the mandible permits early patient mobilization and may prevent adverse postoperative complications.A long pedicle can be harvested with subscapular flaps,which may prove useful in the face of limited available recipient vessels.Critics of the subscapular system cite longer operative times due to the need for patient repositioning and concerns over the integrity of the bone stock.Positioning modifications may permit a two-team approach to subscapular reconstruction,thus limiting operative times.Subscapular harvest does incur shoulder morbidity;however,this does not appear to affect the quality of life significantly.The flap is reliable and can support endosseous implants if properly planned,though it may be more susceptible to bone resorption when compared to the fibula.Overall,the subscapular system remains a versatile donor that can achieve ideal reconstructive outcomes with minimal morbidity.
