From the Department of Aesthetic and Reconstructive Breast Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Ann Plast Surg. 2023 Jan 1;90(1):19-26. doi: 10.1097/SAP.0000000000003353.
The choice of implant shape (anatomic or round) is one of the most critical issues for breast augmentation. Determining whether there are differences in the postoperative breast morphology of the 2 implants is pivotal for surgical planning. This issue has been controversial and lacking in evidence. The aim of this study was to provide reference for implant selection by comparing breast morphology after dual-plane augmentation with anatomic and round implants using 3-dimensional scanning technology.
Patients with implant volume less than 300 mL who underwent transaxillary dual-plane augmentation were included in this study and were grouped according to implant shape. Three-dimensional scans were performed preoperatively and 6 months postoperatively. Postoperative breast height (BH), breast width (BW), BH of upper pole (BHUP), BH of lower pole (BHLP), breast projection (BP), BP of upper pole (BPUP), and BP of lower pole (BPLP) were measured separately, resulting in corresponding ratios (BH/BW, BHUP/BHLP, BP/BH, BPUP/BPLP). Breast volume, and the volumes of each pole (breast volume of upper pole [BVUP], breast volume of lower pole [BVLP]) and its ratio (BVUP/BVLP) were calculated. Correlation and regression analysis on the influencing factors of breast volume were performed.
Thirty patients with anatomic implants and 26 with round implants were enrolled in this study. The mean volumes of anatomic and round implants were 260.5 ± 26.7 and 267.9 ± 21.7 mL (P = 0.192). The ratios of BH/BW in the 2 groups were 1.39 ± 0.12 and 1.37 ± 0.19, respectively (P = 0.582). The BHUP/BHLP values of 2 groups were 1.35 ± 0.22 and 1.41 ± 0.25 (P = 0.160). Two sets of BPUP/BPLP were 0.68 ± 0.19 and 0.73 ± 0.17 (P = 0.133). The ratios of BP/BH in the 2 groups were 0.39 ± 0.08 and 0.39 ± 0.06 (P = 0.830). The BVUP/BVLP ratios for both groups were 0.75 ± 0.11 and 0.77 ± 0.12 (P = 0.287). There was a volume loss rate of 13.3% ± 3.9% and 13.9% ± 5% (P = 0.489). The postoperative volume showed a positive correlation with both the preoperative volume and the implant volume.
For patients with breast dysplasia undergoing transaxillary dual-plane augmentation with anatomic or round implants less than 300 mL, the difference in postoperative breast morphology is not obvious. Using these 2 shapes of implants results in a similar degree of volume loss.
植入物形状（解剖型或圆形）的选择是乳房增大术最重要的问题之一。确定这两种植入物的术后乳房形态是否存在差异对于手术规划至关重要。这个问题一直存在争议，缺乏证据。本研究旨在通过使用三维扫描技术比较解剖型和圆形植入物的双平面隆乳术后的乳房形态，为植入物选择提供参考。
纳入接受经腋路双平面隆乳且植入物体积小于 300mL 的患者，并根据植入物形状进行分组。术前和术后 6 个月进行三维扫描。分别测量术后乳房高度（BH）、乳房宽度（BW）、上极 BH（BHUP）、下极 BH（BHLP）、乳房突出度（BP）、上极 BP（BPUP）和下极 BP（BPLP），得出相应的比值（BH/BW、BHUP/BHLP、BP/BH、BPUP/BPLP）。计算乳房体积和每个极的体积（上极乳房体积[BVUP]、下极乳房体积[BVLP]）及其比值（BVUP/BVLP）。对乳房体积的影响因素进行相关性和回归分析。
本研究纳入了 30 例解剖型植入物患者和 26 例圆形植入物患者。解剖型和圆形植入物的平均体积分别为 260.5±26.7 和 267.9±21.7mL（P=0.192）。两组 BH/BW 的比值分别为 1.39±0.12 和 1.37±0.19（P=0.582）。两组 BHUP/BHLP 值分别为 1.35±0.22 和 1.41±0.25（P=0.160）。两组 BPUP/BPLP 分别为 0.68±0.19 和 0.73±0.17（P=0.133）。两组 BP/BH 的比值分别为 0.39±0.08 和 0.39±0.06（P=0.830）。两组 BVUP/BVLP 的比值分别为 0.75±0.11 和 0.77±0.12（P=0.287）。两组的体积损失率分别为 13.3%±3.9%和 13.9%±5%（P=0.489）。术后体积与术前体积和植入物体积呈正相关。
对于接受经腋路双平面隆乳且植入物体积小于 300mL 的乳房发育不良患者，两种形状植入物的术后乳房形态差异不明显。使用这两种形状的植入物会导致相似程度的体积损失。
