Application of the 3D digital ostectomy template (DOT) in mandibular angle ostectomy (MAO)

Zhang, Chao; Merry, W.; Xu, Jiajie; Lu, Jianjian; Xie, Fang; Yang, Liya; Li, Shuyuan; Wu, Huanhuan; Sun, Haofei; Yang, Biao; Teng, Li

doi:10.1016/j.jcms.2018.07.026

Cited by 23 publications

(10 citation statements)

References 14 publications

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“…36 Zhang et al use a round bur to mark the ostectomy line in their recent article. 37 We, instead, propose the use of ultrasonic technology to perform this specific procedure. The use of ultrasonic technology as a cutting tool in mandibular surgery has a number of advantages over conventional methods: (1) it ensures better control of the ostectomy because of the horizontal parallelism of the cut at the cortical level (both buccal and lingual); and (2) it minimizes possible damage to structures adjacent to the bone because of the inherent characteristics of the ultrasonic cut.…”

Section: Discussionmentioning

confidence: 99%

Facial Gender Confirmation Surgery: The Lower Jaw. Description of Surgical Techniques and Presentation of Results

Simón

Capitán

Bailón

et al. 2022

Plastic &Amp; Reconstructive Surgery

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Background: Of the primary procedures associated with facial gender confirmation surgery, those involving the mentomandibular complex have received the least attention in the literature. Methods: The authors present their experience with 837 trans feminine patients operated on for facial gender confirmation surgery who underwent mandibular bone contouring procedures, including bone contouring, chin and mandibular body and angle ostectomies, and osteotomies to reposition the chin. The authors describe the surgical techniques and materials used, and present a customized lower border–supported cutting guide designed by their team and used with 205 patients. A femininity perception score was calculated preoperatively and 12 months postoperatively, and satisfaction with the results was measured 12 months postoperatively. Results: The postoperative follow-up ranged from 12 to 110 months. The mean femininity perception score increased from 47.86 preoperatively to 76.41 at 12 months postoperatively (p < 0.001). No emergency surgical operations were required. In no case was there any permanent damage to the mental or inferior dental nerve. The reoperation percentage because of problems detected during the postoperative period was 2.63 percent (22 patients). Conclusions: With facial gender confirmation surgery of the jawline and chin, it is possible to modify the transverse and vertical components of the jaw; soften the gonial angles; change the format, bone volume, and position of the chin; and harmonize the entire mandibular line. The facial feminization achieved high satisfaction scores regarding the results and feminine gender appearance 12 months after surgery. The future of mandibular bone contouring techniques includes planning with virtual software and surgical support with patient-specific cutting guides.

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Section: Discussionmentioning

confidence: 99%

Facial Gender Confirmation Surgery: The Lower Jaw. Description of Surgical Techniques and Presentation of Results

Simón

Capitán

Bailón

et al. 2022

Plastic &Amp; Reconstructive Surgery

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“…Since 2013, computer image-guided templates and the 3D digital ostectomy template have been applied to mandibular angle ostectomy to improve the accuracy. [17][18][19][20] The main purpose of using the template was to improve the accuracy of surgical sawing and achieve curved bone resection. However, there have been few cases in these studies (n = 10, respectively), indicating that the template technology has not been widely used.…”

Section: Discussionmentioning

confidence: 99%

“…In this procedure sawn edge of the mandible was not smooth and had to be burred, and many bone blocks produced are difficult to remove. Since 2013, computer image-guided templates and the 3D digital ostectomy template have been applied to mandibular angle ostectomy to improve the accuracy 17–20. The main purpose of using the template was to improve the accuracy of surgical sawing and achieve curved bone resection.…”

Section: Discussionmentioning

confidence: 99%

Reconstructing the New Aesthetic Mandibular Angle With Two-Crossed Ostectomy at the Inferior and Posterior Margin of the Mandible

Zhang

et al. 2022

Journal of Craniofacial Surgery

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Background: Several operative procedures have been introduced to reshape the aesthetic mandibular angle, but unaesthetic results have occurred now and then. Most studies focused only on the facial shape in frontal view but not on the new gonion angle and gonial position in lateral view. The authors describe a new and satisfactory surgical method of mandibular angle contouring to reconstruct the new aesthetic mandibular angle and reshape an oval face for the excessive prominence of the mandibular angle. Patients and Methods: The surgery was carried out with the two-crossed ostectomy at the inferior and posterior margin of the mandible, respectively. For 10 years from 2009 to 2019, the two-crossed ostectomy of mandibular angle has been performed in 1217 consecutive series of Chinese patients. The gonion angle degree, the facial width between the dual gonions, and the horizontal and vertical distances from the gonial point to auricular lobule were measured and recorded before and after an operation. Results: After the two-crossed ostectomy, the patient’s gonion angle significantly changed to 123 to 128 degrees in both women and men. The vertical distance from the horizontal line of the auricular lobule to the gonial point decreased by 2 to 2.5 cm markedly, and the gonial point became located at about 0.85 cm in front of the vertical line of the auricular lobule. The two-crossed ostectomy of the mandibular angle effectively reconstructed the new aesthetic gonion angle and gonial position, reshaped the oval face, and achieved a highly satisfactory result. Conclusions: For patients with excessively prominent mandibular angle, the two-crossed ostectomy at the mandibular ramus and the body could reconstruct the new aesthetic gonial angle and position, make the lower one third of the face attractive from the lateral and anterior perspectives, and deliver greater patient satisfaction and surgical safety.

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“…The inferior alveolar nerve was located using a 3D technique and the osteotomy lines were drawn far away from the nerve 9 . With the aid of ostectomy templates, the safety and accuracy were ensured 10,11 . All surgeries were successfully performed by the same surgeon, using a traditional intra-oral approach.…”

Section: Methodsmentioning

confidence: 99%

Hyperbaric CO2 Cryotherapy for Managing Swelling After Mandibular Angle Ostectomy

Chen

Ma²,

Aung³

et al. 2020

Journal of Craniofacial Surgery

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Postoperative facial swelling after mandibular angle ostectomy is a concern for patients as it affects their quality of life. This study aimed to evaluate the effect of hyperbaric CO 2 cryotherapy in relieving postoperative swelling. Thirty-seven patients (mean age: 22.95 AE 3.49 years) who underwent bilateral mandibular angle ostectomy from April to October 2019, were included in this study. A split-mouth design was adopted and through a random sequence, either side of the face was designated as the experimental side. Both received routine nursing care, while the experimental side underwent an additional hyperbaric CO 2 cryotherapy treatment. The facial structure was recorded by a 3dimensional laser scanner pre-and postoperatively. Geomagic Studio was used for alignment, visualization, and quantification of the swelling. The largest deviation value on each side was adopted to assess the overall swelling. Parameters were compared using the paired t-test, and P<0.05 was considered statistically significant. No necrosis of the skin and adjacent structures or other complications occurred in these patients. After the first day of cryotherapy, the deviation in the experimental and the control groups was (8.40 AE 1.95) mm and (10.42 AE 2.03) mm, respectively. The next day, after cryotherapy, the value further reduced to (5.42 AE 1.36) mm and (8.24 AE 2.22) mm for the experimental and control groups, respectively. And the effect remained till the seventh day. No difference was observed in terms of volume of drainage. Hyperbaric CO 2 cryotherapy is safe and effective in relieving postoperative swelling and seems to be more effective than the traditional cold-pack treatment after mandibular angle ostectomy.

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Application of the 3D digital ostectomy template (DOT) in mandibular angle ostectomy (MAO)

Cited by 23 publications

References 14 publications

Facial Gender Confirmation Surgery: The Lower Jaw. Description of Surgical Techniques and Presentation of Results

Facial Gender Confirmation Surgery: The Lower Jaw. Description of Surgical Techniques and Presentation of Results

Reconstructing the New Aesthetic Mandibular Angle With Two-Crossed Ostectomy at the Inferior and Posterior Margin of the Mandible

Hyperbaric CO2 Cryotherapy for Managing Swelling After Mandibular Angle Ostectomy

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