Garn N W
Am J Orthod. 1976 Apr;69(4):455-63. doi: 10.1016/0002-9416(76)90212-8.
One hundred twenty-four metal and seventy-three plastic brackets were bonded with an ultraviolet-sensitive adhesive system to all available teeth width the exception of maxillary first molars, which were banded, of ten orthodontic patients. Following approximately 7 months of orthodontic treatment, the relative adhesion of metal and plastic brackets in maxillary and mandibular arches and on anterior and posterior teeth was clinically and statistically evaluated. Metal brackets bonded in both maxillary and mandibular arches maintained a 95 per cent success rate, while plastic brackets bonded in the maxillary arch exhibited an 89 per cent success rate during the 7-month treatment period. The direct bonding system and brackets utilized in this clinical study can be confidently used in conjunction with banded orthodontic appliances to obtain the maximum in benefits from both banding and direct bonding. It is recommended that bands be placed on maxillary and mandibular molars and on any other teeth located posteriorly in the dental arch where isolation during bonding may be difficult. Plastic brackets should be confined to maxillary anterior teeth to minimize wing breakage. Torque requirements with plastic brackets may be effected with torquing auxilliaries off round arch wires.
在十名正畸患者的所有可用牙齿（上颌第一磨牙除外，上颌第一磨牙使用带环）上，用一种紫外线敏感型粘结系统粘结了124个金属托槽和73个塑料托槽。在大约7个月的正畸治疗后，对金属和塑料托槽在上颌和下颌牙弓以及前牙和后牙上的相对粘结情况进行了临床和统计学评估。在上颌和下颌牙弓粘结的金属托槽在7个月的治疗期内保持了95%的成功率，而上颌牙弓粘结的塑料托槽成功率为89%。本临床研究中使用的直接粘结系统和托槽可以放心地与带环正畸矫治器联合使用，以从带环和直接粘结中获得最大益处。建议在上颌和下颌磨牙以及牙弓后部任何粘结时可能难以隔离的其他牙齿上放置带环。塑料托槽应限于上颌前牙，以尽量减少翼片折断。塑料托槽的扭矩要求可通过圆形弓丝上的扭矩辅助装置来实现。
