摘要: In a climate of on-line opinion blogs, internet puffery, proprietary advocacy, persuasive testimonials, distain for evidence, and the patient's confusion second or third referrals, resistance seems futile embracing most any trend in orthodontics. No matter propriety, utility, evidence basis, it seems: anything goes. olden days, glimpse expansion was looked on as something not fashion. Today, so much. Early late timing, arches wider maintained, forces heavy light, extracted expanded, passive active, are all perpetually debated. As Cole Porter wrote, " I know that am bound to answer, when you propose ." But, there is really only one question merit answer we get down brass tacks arch length orthodontia: more bone less teeth. Which?