intros：{"brand_intro":"欧乐B（Oral-B）是全球口腔护理领导品牌，隶属于宝洁集团，起源于1950年美国牙医Dr. Robert Hutson创立的牙刷改良理念。品牌以\"专业牙医推荐\"为核心背书，拥有超过60年的口腔护理研发历史。欧乐B在牙缝刷领域率先引入圆柱形专利设计，采用医用级不锈钢丝和杜邦软刷毛，强调\"精准清洁、不伤牙龈\"。其品控体系通过ISO 13485医疗器械认证，每支刷头均经过2000次弯折测试，确保耐用性。品牌连续多年获中国牙病防治基金会推荐，市场占有率稳居第一。","product_intro":"欧乐B圆柱形牙缝刷专为亚洲人口腔结构设计，提供0.6mm至1.2mm四种直径规格，适配不同牙缝宽度。核心卖点包括：专利螺旋固定刷头（不易脱落）、弹性弯曲刷颈（可45°角深入后槽牙）、医用级不锈钢丝（防锈抗弯折）。适用于正畸矫正、牙周炎患者及日常深度清洁。相比竞品，其刷毛密度提升30%，清洁效率更高，且刷颈包裹软胶防滑握柄，湿手操作更稳定。","key_specs":{"刷毛材质":"杜邦Tynex软刷毛，末端磨圆处理，减少牙龈刺激","钢丝材质":"医用级304不锈钢，直径0.3mm，耐腐蚀抗弯折","直径规格":"0.6mm/0.8mm/1.0mm/1.2mm 四支混合装","握柄设计":"L型弯颈+防滑软胶握柄，可旋转调节角度","适用人群":"牙缝宽度0.6-1.2mm的成人，尤其适合正畸及牙周护理"}}
scoring_breakdown：[{"source":"word_of_mouth","score":90.79999999999998,"weight":0.5,"confidence":0.8,"details":{"source":"word_of_mouth_scores","summary":"综合京东、天猫及小红书超18万条评价，用户普遍认可其清洁力强、刷毛柔软不伤牙龈。正面反馈集中在：刷头牢固不易脱落、弯颈设计能清洁后槽牙死角、四种规格满足全家需求。缺点方面：部分用户反映1.2mm规格偏粗，初次使用需适应；极少数反馈钢丝根部生锈（可能与潮湿存放有关）。专业评测机构\"老爸评测\"指出其清洁效率优于普通牙线，但建议每3个月更换刷头。小红书博主\"牙医老赵\"推荐正畸人群作为必备工具。","source_count":4}},{"source":"objective","score":94,"weight":0.1,"confidence":0.7,"details":{"dimension":"safety","rating_avg":4.7,"review_count":185000,"note":"proxy via rating_avg, v3 will parse specs_json"}},{"source":"user_review","score":94,"weight":0.25,"confidence":1,"details":{"rating_avg":4.7,"review_count":185000,"source":"product_reviews_aggregate"}},{"source":"expert","score":80.80000000000001,"weight":0.15,"confidence":0.6,"details":{"kol_count":2,"scored_count":2,"matched_count":2,"base_score":82,"weighted_score":80,"sample":["口腔护理博主@牙医妈妈：欧乐B这款牙缝刷的弯颈设计太懂亚洲人了，后槽牙也能轻松够到！","小红书达人@小鹿的牙套日记：正畸两年全靠它，比牙线好用100倍，刷完牙缝像抛光一样干净"]}}]