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上颌横向发育不足是错n 畸形的重要表现之一，由于横向发育停止相对较早，早期对其进行准确的诊断和预测尤为重要。目前，国内外针对横向不调的诊断方式较多，包括临床检查、模型测量、头颅后前位X线片测量和锥形束CT测量。本文回顾现有文献中针对上颌横向发育不足所采用的诊断及预测方法，以协助正畸医师较全面地了解相关诊断方式及其优缺点。n “,”Maxillary transverse deficiency is one of the critical manifestations of malocclusion. It is of vital importance to diagnose maxillary transverse deficiency at the early stage because maxillary development in the transverse dimension stops early. Currently, there are several approaches to diagnose maxillary transverse deficiency, including clinical examination, dental cast measurement, poster-anterior cephalogram, and cone-beam CT. This narrative review will review these diagnostic and predictive approaches of maxillary transverse deficiency.