The Hip book

Surface Coating for Press Fit Femoral / Acetabular Components:

– Discussion:     – see bone ingrowth      – most important factor for initial success of cementless THR;     – reduces micromotion between implant and bone along entire length of implant;     – pore size:             – porous ingrowth surfaces w/ beads or wires that create pore-interconnection … Read more

Characteristics of Metals and Implants

– Discussion:        – Biomechanics Menu        – Metal Fatigue        – Ultimate Tensile Strength        – Yield Strength:         – Types of Metals:                   – Cobalt Based Alloys                   – Titanium                   – Vitallium                   – Stainless steel         – Combinations of Metals:            – dissimilar metal alloys are used in combination … Read more

Cervical Spine Clearance in the Trauma Patient:

– Discussion:    – truama workup     – radiology of the cervical spine             – flourscopy of C-spine             – MRI of the spine              – CT in cervical frx              – pediatric C-spine              – SCIWORA syndrome      – distribution of injuries in c-spine trauma:             – MVA:  1st > 5th > 6th … Read more

Flouroscopy in the Clearance of the Cervical Spine:

– Discussion:             – in the report by Davis, et al (2001), the authors evaluated the efficacy and safety of dynamic fluoroscopy flexion-extension  examinations in identifying ligamentous cervical spine injury and clearing the cervical spine in patients with altered mental status after trauma;              – protocol required visualization of the entire cervical spine, through T1, through full extension … Read more

Cervical Disc Herniation

– See:       – Cervical Spondylosis:       – SCIWORA Syndrome – Discussion:     – are most frequent at C 6-7 level but also occur at C 5-6 & to a lesser extent at C4-5 & other levels;     – in relatively younger persons soft disk protrussion is more common … Read more

Amyotrophic Lateral Sclerosis

– See: – El Escorial Revisited: Revised Criteria for the Diagnosis of Amyotrophic Lateral Sclerosis       – Disorders of Nerves:       – Anterior Horn Cell Disorders:       – ALS Society Homepage – Discussion:     – amyotrophic lateral sclerosis is a syndrome characterized by both upper and lower motor neuron … Read more

Technique for King-Moe Type I or II

Technique Overview: The strategy for instrumenting a King-Moe Type I or II curve (Figure 19) is similar to that used for a Type III curve. The primary difference is that the lumbar curve is fractionally instrumented with use of a down-going hook at L1 on the convex lumbar, concave thoracic side and an up-going hook … Read more