The booming three-dimensional laser scanning technology can efficiently and effectively get spatial three-dimensional coordinates of the detected object surface and reconstruct the image at high speed, high precision and large capacity of information. Non-radiation, non-contact and the ability of visualization make it increasingly popular in three-dimensional surface medical mapping. This paper reviews the applications and developments of three-dimensional laser scanning technology in medical field, especially in stomatology, plastic surgery and orthopedics. Furthermore, the paper also discusses the application prospects in the future as well as the biomedical engineering problems it would encounter with.
Objective
To summarize the research progress of abdominoplasty.
Methods
The literature related to abdominoplasty in recent years was reviewed and the evolution of this surgical method and related surgical techniques were summarized.
Results
By removing excess skin adipose tissue from abdominal wall and strengthening loosening muscle fascia system, the abdominal wall contour can be improved by abdominoplasty. With the development of liposuction, selective flaps undermining, progressive tension sutures, and Scarpa fascia retention, the trauma and complications of abdominoplasty are significantly reduced, and better aesthetic result is achieved.
Conclusion
At present, the incidence of abdominoplasty complication is still the highest among cosmetic surgeries, and further exploration is needed to reduce complications and improve aesthetic effects.
ObjectiveTo explore the effectiveness of the zygomatic spindle-shaped osteotomy and internal push of titanium screw anchor for prominent malar.
MethodBetween July 2011 and January 2015, 58 patients with prominent malar underwent zygomatic spindle-shaped osteotomy and internal push of titanium screw anchor. There were 3 males and 55 females, aged 18-33 years (mean, 23 years). They had congenital bilateral prominent malar. Preoperative anteroposterior, lateral, supine position, 45°oblique photographs of the face were taken, three-dimensional CT reconstruction of face was performed. Simple prominent malar was observed in 30 cases, and prominent malar and zygomatic arch in 28 cases; zygomatic bone and zygomatic arch were symmetrical in 51 cases, and asymmetrical in 7 cases.
ResultsAll patients obtained stage I incision healing after operation, without infection or hematoma. Numbness of the upper lip occurred in 2 cases, limitation of mouth opening in 1 case, and nasolabial fold deepening in 1 case, which recovered spontaneously after 3 months. Fifty-eight cases were followed up 6-12 months (mean, 10 months). Zygomatic narrow spacing was 10.6-13.9 mm (mean, 11.2 mm). No ptosis of facial soft tissue, zygomatic step, facial nerve injury, raising eyebrow, dysfunction of eyes closure, or temporomandibular joint disorder syndrome occurred. Good bone healing was obtained, zygomatic facial sensation had no obvious abnormality, all patients were satisfied with the improvement of appearance.
ConclusionsZygomatic spindle-shaped osteotomy and internal push titanium screw anchor can effectively reduce the cheekbones, and maintain the natural curve of zygomatic body and zygomatic arch. Because of simple operation, less complications, and excellent results, it is an ideal plasty.
ObjectiveTo evaluate the effectiveness of autologous costal cartilage-based open rhinoplasty in the correction of secondary unilateral cleft lip nasal deformity.MethodsBetween January 2013 and June 2020, 30 patients with secondary unilateral cleft lip nasal deformity were treated, including 13 males and 17 females; aged 14-41 years, with an average of 21.7 years. Among them, 18 cases were cleft lip, 9 cases were cleft lip and palate, and 3 cases were cleft lip and palate with cleft alveolar. The autologous costal cartilage-based open rhinoplasty was used for the treatment, and the alar annular graft was used to correct the collapsed alar of the affected side. Before operation and at 6-12 months after operation, photos were taken in the anteroposterior position, nasal base position, oblique position, and left and right lateral positions, and the following indicators were measured: rhinofacial angle, nasolabial angle, deviation angle of central axis of columella, nostril height to width ratio, and bilateral nasal symmetry index (including nostril height, nostril width, and nostril height to width ratio).ResultsThe incisions healed by first intention after operation, and no complications such as acute infection occurred. All 30 patients were followed up 6 months to 2 years, with an average of 15.2 months. During the follow-up, the patients’ nasal shape remained good, the tip of the nose and columella were basically centered, the back of the nose was raised, the collapse of the affected side of nasal alar and the movement of the feet outside the nasal alar were all lessened than preoperatively. The basement was elevated compared to the front, and no cartilage was exposed or infection occurred. None of the patients had obvious cartilage absorption and recurrence of drooping nose. Except for the bilateral nostril width symmetry index before and after operation, there was no significant difference (t=1.950, P=0.061), the other indexes were significantly improved after operation when compared with preoperatively (P<0.05). Eleven patients (36.7%) requested revision operation, and the results were satisfactory after revision. The rest of the patients’ nasal deformities were greatly improved at one time, and they were satisfied with the effectiveness.ConclusionAutologous costal cartilage-based open rhinoplasty with the alar annular graft is a safe and effective treatment for secondary unilateral cleft lip nasal deformity.
ObjectiveTo systematically review the survival rate of different vascularized bone flaps in mandibular defect repair and reconstruction by Bayesian network meta-analysis. MethodsThe PubMed, EBSCO, Scopus, Web of Science, Cochrane Library, WanFang Data and CNKI databases were electronically searched to collect clinical studies related to the objectives from inception to February 2024. Two reviewers independently screened literature, extracted data and assessed the risk of bias of the included studies. The Bayesian network meta-analysis was carried out applying R software. ResultsA total of 24 studies involving 1 615 patients were included. The results of meta-analysis showed that the respective survival rates of fibula free flap (FFF), deep circumferential iliac artery flap (DCIA), scapula flap, and osteocutaneous radial forearm flap (ORFF) were 95.62%, 94.09%, 98.16%, and 93.75%. Moreover, the network meta-analysis failed to show a statistically significant difference between all comparators. Conclusion?Current evidence shows that different vascularized bone flaps have similar survival rates in mandibular defect repair and reconstruction. Due to the limited quality and quantity of the included studies, more high quality studies are needed to verify the above conclusion.
Objective To investigate the surgical procedures and outcomes of repairing the wound in the posterior wall of vaginal orifice by labium minus flap transfer, when vagina tightening plastic surgery is performed on the patient with scar in the posterior wall of vaginal orifice and labium minus hypertrophy. Methods From May 2007 to May 2008, 10 patients suffering from postpartum vaginal relaxation combined with scar in the posterior wall of vaginal orifice and labium minus hypertrophy were treated. The patients aged 28-40 years old and the width of their labium minus was 3-5 cm. Six ofthem had coitus pain. Vaginal tightening surgery was performed, meanwhile the hypertrophic labium minus was preparedinto the anterior-pedicle labium minus flap (4 cm × 1 cm-5 cm × 1 cm) and the posterior-pedicle labium minus flap (3 cm × 2 cm-4 cm × 3 cm), respectively. The posterior-pedicle labium minus flap was transferred inwards by 90° to repair the wound caused by the resection of the scar, and the anterior-pedicle labium minus flap was sutured in situ to form the new labium minus. Results All the posterior-pedicle labium minus flaps survived, except for 3 cases in which the epidermis 1 cm around the distal end of posterior-pedicle labium minus flap was exfol iated and recovered 2 weeks after hi p bath with potassium permanganate solution (1: 5 000). All the anterior-pedicle labium minus flaps survived, and all the incisions healed by first intention. Over the follow-up period of 2-8 months, all the patients were satisfied with their vulva configuration, good elasticity of vaginal orifice and no tenderness pain of vaginal orifice. The sensitivities to feel ing, such as touch and pain, of the transferred labium minus flap were similar to the normal labium minus. Postoperatively, the coitus pain disappeared, 7 cases had much better sex l ife and 3 cases had no significant improvement in sex l ife. Conclusion Transferring labium minus flap to vaginal orifice is an effective way to improve the coital pain resulted from the scar of vaginal orifice.
